Merge acorn 1.0.0 (formerly 'update to modular acorn' in original history).
This commit is contained in:
Logan Smyth
commit
01b39d67f0
@ -1,4 +0,0 @@
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# Acorn
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Embedded version with Babel-specific modifications of the excellent
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[acorn](https://github.com/marijnh/acorn) parser.
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61
package.json
Normal file → Executable file
61
package.json
Normal file → Executable file
@ -1,23 +1,44 @@
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{
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"name": "acorn",
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"description": "ECMAScript parser",
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"homepage": "http://marijnhaverbeke.nl/acorn/",
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"main": "acorn.js",
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"version": "0.12.1",
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"engines": {"node": ">=0.4.0"},
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"browser": "acorn_csp.js",
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"maintainers": [{"name": "Marijn Haverbeke",
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"email": "marijnh@gmail.com",
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"web": "http://marijnhaverbeke.nl"}],
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"repository": {"type": "git",
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"url": "http://marijnhaverbeke.nl/git/acorn"},
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"licenses": [{"type": "MIT",
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"url": "http://marijnhaverbeke.nl/acorn/LICENSE"}],
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"scripts": {
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"test": "node test/run.js",
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"prepublish": "node bin/without_eval > acorn_csp.js"
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"name": "acorn",
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"description": "ECMAScript parser",
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"homepage": "https://github.com/marijnh/acorn",
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"main": "src/index.js",
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"version": "1.0.0",
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"engines": {
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"node": ">=0.4.0"
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},
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"maintainers": [
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{
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"name": "Marijn Haverbeke",
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"email": "marijnh@gmail.com",
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"web": "http://marijnhaverbeke.nl"
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},
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"bin": {"acorn": "./bin/acorn"},
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"devDependencies": {"regenerate": "~0.6.2",
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"unicode-7.0.0": "~0.1.5"}
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{
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||||
"name": "Ingvar Stepanyan",
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"email": "me@rreverser.com",
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"web": "http://rreverser.com/"
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}
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],
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"repository": {
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"type": "git",
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"url": "https://github.com/marijnh/acorn.git"
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},
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"licenses": [
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{
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"type": "MIT",
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"url": "https://raw.githubusercontent.com/marijnh/acorn/master/LICENSE"
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}
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],
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"scripts": {
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"test": "node test/run.js",
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"prepublish": "node bin/prepublish.sh"
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},
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"bin": {
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"acorn": "./bin/acorn"
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},
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"devDependencies": {
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"babelify": "^5.0.4",
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"browserify": "^9.0.3",
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"unicode-7.0.0": "~0.1.5"
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}
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}
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824
plugins/flow.js
824
plugins/flow.js
File diff suppressed because it is too large
Load Diff
@ -1,4 +1,4 @@
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var acorn = require("../acorn");
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var acorn = require("..")
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var tt = acorn.tokTypes;
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var tc = acorn.tokContexts;
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@ -437,7 +437,7 @@ pp.jsx_parseIdentifier = function() {
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// Parse namespaced identifier.
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pp.jsx_parseNamespacedName = function() {
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var start = this.currentPos();
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var start = this.markPosition();
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var name = this.jsx_parseIdentifier();
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if (!this.eat(tt.colon)) return name;
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var node = this.startNodeAt(start);
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@ -450,7 +450,7 @@ pp.jsx_parseNamespacedName = function() {
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// or single identifier.
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pp.jsx_parseElementName = function() {
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var start = this.currentPos();
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var start = this.markPosition();
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var node = this.jsx_parseNamespacedName();
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while (this.eat(tt.dot)) {
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var newNode = this.startNodeAt(start);
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@ -559,7 +559,7 @@ pp.jsx_parseElementAt = function(start) {
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contents: for (;;) {
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switch (this.type) {
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case tt.jsxTagStart:
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start = this.currentPos();
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start = this.markPosition();
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this.next();
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if (this.eat(tt.slash)) {
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closingElement = this.jsx_parseClosingElementAt(start);
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@ -595,7 +595,7 @@ pp.jsx_parseElementAt = function(start) {
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// Parses entire JSX element from current position.
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pp.jsx_parseElement = function() {
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var start = this.currentPos();
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var start = this.markPosition();
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this.next();
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return this.jsx_parseElementAt(start);
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};
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@ -634,7 +634,6 @@ acorn.plugins.jsx = function(instance) {
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++this.pos;
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return this.finishToken(tt.jsxTagStart);
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}
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return inner.call(this, code);
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};
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});
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668
src/.subladf.tmp
Normal file
668
src/.subladf.tmp
Normal file
@ -0,0 +1,668 @@
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// A recursive descent parser operates by defining functions for all
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// syntactic elements, and recursively calling those, each function
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// advancing the input stream and returning an AST node. Precedence
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// of constructs (for example, the fact that `!x[1]` means `!(x[1])`
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// instead of `(!x)[1]` is handled by the fact that the parser
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// function that parses unary prefix operators is called first, and
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// in turn calls the function that parses `[]` subscripts — that
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// way, it'll receive the node for `x[1]` already parsed, and wraps
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// *that* in the unary operator node.
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//
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// Acorn uses an [operator precedence parser][opp] to handle binary
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// operator precedence, because it is much more compact than using
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// the technique outlined above, which uses different, nesting
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// functions to specify precedence, for all of the ten binary
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// precedence levels that JavaScript defines.
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//
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// [opp]: http://en.wikipedia.org/wiki/Operator-precedence_parser
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import {types as tt} from "./tokentype"
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import {Parser} from "./state"
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import {reservedWords} from "./identifier"
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import {has} from "./util"
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const pp = Parser.prototype
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// Check if property name clashes with already added.
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// Object/class getters and setters are not allowed to clash —
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// either with each other or with an init property — and in
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// strict mode, init properties are also not allowed to be repeated.
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pp.checkPropClash = function(prop, propHash) {
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if (this.options.ecmaVersion >= 6) return
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let key = prop.key, name
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switch (key.type) {
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case "Identifier": name = key.name; break
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||||
case "Literal": name = String(key.value); break
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||||
default: return
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}
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let kind = prop.kind || "init", other
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if (has(propHash, name)) {
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other = propHash[name]
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let isGetSet = kind !== "init"
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if ((this.strict || isGetSet) && other[kind] || !(isGetSet ^ other.init))
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this.raise(key.start, "Redefinition of property")
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} else {
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||||
other = propHash[name] = {
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init: false,
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get: false,
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set: false
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||||
}
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||||
}
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other[kind] = true
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||||
}
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// ### Expression parsing
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||||
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||||
// These nest, from the most general expression type at the top to
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// 'atomic', nondivisible expression types at the bottom. Most of
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// the functions will simply let the function(s) below them parse,
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// and, *if* the syntactic construct they handle is present, wrap
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||||
// the AST node that the inner parser gave them in another node.
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||||
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||||
// Parse a full expression. The optional arguments are used to
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// forbid the `in` operator (in for loops initalization expressions)
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// and provide reference for storing '=' operator inside shorthand
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// property assignment in contexts where both object expression
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// and object pattern might appear (so it's possible to raise
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// delayed syntax error at correct position).
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pp.parseExpression = function(noIn, refShorthandDefaultPos) {
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let start = this.markPosition()
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let expr = this.parseMaybeAssign(noIn, refShorthandDefaultPos)
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if (this.type === tt.comma) {
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||||
let node = this.startNodeAt(start)
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node.expressions = [expr]
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while (this.eat(tt.comma)) node.expressions.push(this.parseMaybeAssign(noIn, refShorthandDefaultPos))
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return this.finishNode(node, "SequenceExpression")
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}
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return expr
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}
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// Parse an assignment expression. This includes applications of
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// operators like `+=`.
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pp.parseMaybeAssign = function(noIn, refShorthandDefaultPos) {
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if (this.type == tt._yield && this.inGenerator) return this.parseYield()
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let failOnShorthandAssign
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if (!refShorthandDefaultPos) {
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refShorthandDefaultPos = {start: 0}
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failOnShorthandAssign = true
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} else {
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failOnShorthandAssign = false
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||||
}
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let start = this.markPosition()
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let left = this.parseMaybeConditional(noIn, refShorthandDefaultPos)
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if (this.type.isAssign) {
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let node = this.startNodeAt(start)
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node.operator = this.value
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node.left = this.type === tt.eq ? this.toAssignable(left) : left
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refShorthandDefaultPos.start = 0; // reset because shorthand default was used correctly
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||||
this.checkLVal(left)
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this.next()
|
||||
node.right = this.parseMaybeAssign(noIn)
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return this.finishNode(node, "AssignmentExpression")
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} else if (failOnShorthandAssign && refShorthandDefaultPos.start) {
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||||
this.unexpected(refShorthandDefaultPos.start)
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}
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return left
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}
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// Parse a ternary conditional (`?:`) operator.
|
||||
|
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pp.parseMaybeConditional = function(noIn, refShorthandDefaultPos) {
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let start = this.markPosition()
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let expr = this.parseExprOps(noIn, refShorthandDefaultPos)
|
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if (refShorthandDefaultPos && refShorthandDefaultPos.start) return expr
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if (this.eat(tt.question)) {
|
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let node = this.startNodeAt(start)
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node.test = expr
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||||
node.consequent = this.parseMaybeAssign()
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||||
this.expect(tt.colon)
|
||||
node.alternate = this.parseMaybeAssign(noIn)
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return this.finishNode(node, "ConditionalExpression")
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||||
}
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return expr
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}
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|
||||
// Start the precedence parser.
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pp.parseExprOps = function(noIn, refShorthandDefaultPos) {
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let start = this.markPosition()
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let expr = this.parseMaybeUnary(refShorthandDefaultPos)
|
||||
if (refShorthandDefaultPos && refShorthandDefaultPos.start) return expr
|
||||
return this.parseExprOp(expr, start, -1, noIn)
|
||||
}
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||||
|
||||
// Parse binary operators with the operator precedence parsing
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// algorithm. `left` is the left-hand side of the operator.
|
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// `minPrec` provides context that allows the function to stop and
|
||||
// defer further parser to one of its callers when it encounters an
|
||||
// operator that has a lower precedence than the set it is parsing.
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|
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pp.parseExprOp = function(left, leftStart, minPrec, noIn) {
|
||||
let prec = this.type.binop
|
||||
if (prec != null && (!noIn || this.type !== tt._in)) {
|
||||
if (prec > minPrec) {
|
||||
let node = this.startNodeAt(leftStart)
|
||||
node.left = left
|
||||
node.operator = this.value
|
||||
let op = this.type
|
||||
this.next()
|
||||
let start = this.markPosition()
|
||||
node.right = this.parseExprOp(this.parseMaybeUnary(), start, op.rightAssociative ? (prec - 1) : prec, noIn)
|
||||
this.finishNode(node, (op === tt.logicalOR || op === tt.logicalAND) ? "LogicalExpression" : "BinaryExpression")
|
||||
return this.parseExprOp(node, leftStart, minPrec, noIn)
|
||||
}
|
||||
}
|
||||
return left
|
||||
}
|
||||
|
||||
// Parse unary operators, both prefix and postfix.
|
||||
|
||||
pp.parseMaybeUnary = function(refShorthandDefaultPos) {
|
||||
if (this.type.prefix) {
|
||||
let node = this.startNode(), update = this.type === tt.incDec
|
||||
node.operator = this.value
|
||||
node.prefix = true
|
||||
this.next()
|
||||
node.argument = this.parseMaybeUnary()
|
||||
if (refShorthandDefaultPos && refShorthandDefaultPos.start) this.unexpected(refShorthandDefaultPos.start)
|
||||
if (update) this.checkLVal(node.argument)
|
||||
else if (this.strict && node.operator === "delete" &&
|
||||
node.argument.type === "Identifier")
|
||||
this.raise(node.start, "Deleting local variable in strict mode")
|
||||
return this.finishNode(node, update ? "UpdateExpression" : "UnaryExpression")
|
||||
}
|
||||
let start = this.markPosition()
|
||||
let expr = this.parseExprSubscripts(refShorthandDefaultPos)
|
||||
if (refShorthandDefaultPos && refShorthandDefaultPos.start) return expr
|
||||
while (this.type.postfix && !this.canInsertSemicolon()) {
|
||||
let node = this.startNodeAt(start)
|
||||
node.operator = this.value
|
||||
node.prefix = false
|
||||
node.argument = expr
|
||||
this.checkLVal(expr)
|
||||
this.next()
|
||||
expr = this.finishNode(node, "UpdateExpression")
|
||||
}
|
||||
return expr
|
||||
}
|
||||
|
||||
// Parse call, dot, and `[]`-subscript expressions.
|
||||
|
||||
pp.parseExprSubscripts = function(refShorthandDefaultPos) {
|
||||
let start = this.markPosition()
|
||||
let expr = this.parseExprAtom(refShorthandDefaultPos)
|
||||
if (refShorthandDefaultPos && refShorthandDefaultPos.start) return expr
|
||||
return this.parseSubscripts(expr, start)
|
||||
}
|
||||
|
||||
pp.parseSubscripts = function(base, start, noCalls) {
|
||||
if (this.eat(tt.dot)) {
|
||||
let node = this.startNodeAt(start)
|
||||
node.object = base
|
||||
node.property = this.parseIdent(true)
|
||||
node.computed = false
|
||||
return this.parseSubscripts(this.finishNode(node, "MemberExpression"), start, noCalls)
|
||||
} else if (this.eat(tt.bracketL)) {
|
||||
let node = this.startNodeAt(start)
|
||||
node.object = base
|
||||
node.property = this.parseExpression()
|
||||
node.computed = true
|
||||
this.expect(tt.bracketR)
|
||||
return this.parseSubscripts(this.finishNode(node, "MemberExpression"), start, noCalls)
|
||||
} else if (!noCalls && this.eat(tt.parenL)) {
|
||||
let node = this.startNodeAt(start)
|
||||
node.callee = base
|
||||
node.arguments = this.parseExprList(tt.parenR, false)
|
||||
return this.parseSubscripts(this.finishNode(node, "CallExpression"), start, noCalls)
|
||||
} else if (this.type === tt.backQuote) {
|
||||
let node = this.startNodeAt(start)
|
||||
node.tag = base
|
||||
node.quasi = this.parseTemplate()
|
||||
return this.parseSubscripts(this.finishNode(node, "TaggedTemplateExpression"), start, noCalls)
|
||||
} return base
|
||||
}
|
||||
|
||||
// Parse an atomic expression — either a single token that is an
|
||||
// expression, an expression started by a keyword like `function` or
|
||||
// `new`, or an expression wrapped in punctuation like `()`, `[]`,
|
||||
// or `{}`.
|
||||
|
||||
pp.parseExprAtom = function(refShorthandDefaultPos) {
|
||||
let node
|
||||
switch (this.type) {
|
||||
case tt._this:
|
||||
case tt._super:
|
||||
let type = this.type === tt._this ? "ThisExpression" : "Super"
|
||||
node = this.startNode()
|
||||
this.next()
|
||||
return this.finishNode(node, type)
|
||||
|
||||
case tt._yield:
|
||||
if (this.inGenerator) unexpected()
|
||||
|
||||
case tt.name:
|
||||
let start = this.markPosition()
|
||||
let id = this.parseIdent(this.type !== tt.name)
|
||||
if (!this.canInsertSemicolon() && this.eat(tt.arrow)) {
|
||||
return this.parseArrowExpression(this.startNodeAt(start), [id])
|
||||
}
|
||||
return id
|
||||
|
||||
case tt.regexp:
|
||||
let value = this.value
|
||||
node = this.parseLiteral(value.value)
|
||||
node.regex = {pattern: value.pattern, flags: value.flags}
|
||||
return node
|
||||
|
||||
case tt.num: case tt.string:
|
||||
return this.parseLiteral(this.value)
|
||||
|
||||
case tt._null: case tt._true: case tt._false:
|
||||
node = this.startNode()
|
||||
node.value = this.type === tt._null ? null : this.type === tt._true
|
||||
node.raw = this.type.keyword
|
||||
this.next()
|
||||
return this.finishNode(node, "Literal")
|
||||
|
||||
case tt.parenL:
|
||||
return this.parseParenAndDistinguishExpression()
|
||||
|
||||
case tt.bracketL:
|
||||
node = this.startNode()
|
||||
this.next()
|
||||
// check whether this is array comprehension or regular array
|
||||
if ((this.options.ecmaVersion >= 7 || this.option.features["es7.comprehensions"]) && this.type === tt._for) {
|
||||
return this.parseComprehension(node, false)
|
||||
}
|
||||
node.elements = this.parseExprList(tt.bracketR, true, true, refShorthandDefaultPos)
|
||||
return this.finishNode(node, "ArrayExpression")
|
||||
|
||||
case tt.braceL:
|
||||
return this.parseObj(false, refShorthandDefaultPos)
|
||||
|
||||
case tt._function:
|
||||
node = this.startNode()
|
||||
this.next()
|
||||
return this.parseFunction(node, false)
|
||||
|
||||
case tt._class:
|
||||
return this.parseClass(this.startNode(), false)
|
||||
|
||||
case tt._new:
|
||||
return this.parseNew()
|
||||
|
||||
case tt.backQuote:
|
||||
return this.parseTemplate()
|
||||
|
||||
default:
|
||||
this.unexpected()
|
||||
}
|
||||
}
|
||||
|
||||
pp.parseLiteral = function(value) {
|
||||
let node = this.startNode()
|
||||
node.value = value
|
||||
node.raw = this.input.slice(this.start, this.end)
|
||||
this.next()
|
||||
return this.finishNode(node, "Literal")
|
||||
}
|
||||
|
||||
pp.parseParenExpression = function() {
|
||||
this.expect(tt.parenL)
|
||||
let val = this.parseExpression()
|
||||
this.expect(tt.parenR)
|
||||
return val
|
||||
}
|
||||
|
||||
pp.parseParenAndDistinguishExpression = function(start, isAsync) {
|
||||
start = start || this.markPosition()
|
||||
var val
|
||||
if (this.options.ecmaVersion >= 6) {
|
||||
this.next()
|
||||
|
||||
if ((this.options.features["es7.comprehensions"] || this.options.ecmaVersion >= 7) && this.type === tt._for) {
|
||||
return this.parseComprehension(this.startNodeAt(start), true)
|
||||
}
|
||||
|
||||
var innerStart = this.markPosition(), exprList = [], first = true
|
||||
var refShorthandDefaultPos = {start: 0}, spreadStart, innerParenStart
|
||||
while (this.type !== tt.parenR) {
|
||||
first ? first = false : this.expect(tt.comma)
|
||||
if (this.type === tt.ellipsis) {
|
||||
var spreadNodeStart = this.markPosition()
|
||||
spreadStart = this.start
|
||||
exprList.push(this.parseParenItem(this.parseRest(), spreadNodeStart))
|
||||
break
|
||||
} else {
|
||||
if (this.type === tt.parenL && !innerParenStart) {
|
||||
innerParenStart = this.start
|
||||
}
|
||||
exprList.push(this.parseMaybeAssign(false, refShorthandDefaultPos, this.parseParenItem))
|
||||
}
|
||||
}
|
||||
var innerEnd = this.markPosition()
|
||||
this.expect(tt.parenR)
|
||||
|
||||
if (!this.canInsertSemicolon() && this.eat(tt.arrow)) {
|
||||
if (innerParenStart) this.unexpected(innerParenStart)
|
||||
return this.parseParenArrowList(start, exprList, isAsync)
|
||||
}
|
||||
|
||||
if (!exprList.length) this.unexpected(this.lastTokStart)
|
||||
if (spreadStart) this.unexpected(spreadStart)
|
||||
if (refShorthandDefaultPos.start) this.unexpected(refShorthandDefaultPos.start)
|
||||
|
||||
if (exprList.length > 1) {
|
||||
val = this.startNodeAt(innerStart)
|
||||
val.expressions = exprList
|
||||
this.finishNodeAt(val, "SequenceExpression", innerEnd)
|
||||
} else {
|
||||
val = exprList[0]
|
||||
}
|
||||
} else {
|
||||
val = this.parseParenExpression()
|
||||
}
|
||||
|
||||
if (this.options.preserveParens) {
|
||||
var par = this.startNodeAt(start)
|
||||
par.expression = val
|
||||
return this.finishNode(par, "ParenthesizedExpression")
|
||||
} else {
|
||||
return val
|
||||
}
|
||||
}
|
||||
|
||||
pp.parseParenArrowList = function (start, exprList, isAsync) {
|
||||
return this.parseArrowExpression(this.startNodeAt(start), exprList, isAsync)
|
||||
}
|
||||
|
||||
pp.parseParenItem = function (node, start) {
|
||||
return node
|
||||
}
|
||||
|
||||
// New's precedence is slightly tricky. It must allow its argument
|
||||
// to be a `[]` or dot subscript expression, but not a call — at
|
||||
// least, not without wrapping it in parentheses. Thus, it uses the
|
||||
|
||||
const empty = []
|
||||
|
||||
pp.parseNew = function() {
|
||||
let node = this.startNode()
|
||||
let meta = this.parseIdent(true)
|
||||
if (this.options.ecmaVersion >= 6 && this.eat(tt.dot)) {
|
||||
node.meta = meta
|
||||
node.property = this.parseIdent(true)
|
||||
if (node.property.name !== "target")
|
||||
this.raise(node.property.start, "The only valid meta property for new is new.target")
|
||||
return this.finishNode(node, "MetaProperty")
|
||||
}
|
||||
let start = this.markPosition()
|
||||
node.callee = this.parseSubscripts(this.parseExprAtom(), start, true)
|
||||
if (this.eat(tt.parenL)) node.arguments = this.parseExprList(tt.parenR, false)
|
||||
else node.arguments = empty
|
||||
return this.finishNode(node, "NewExpression")
|
||||
}
|
||||
|
||||
// Parse template expression.
|
||||
|
||||
pp.parseTemplateElement = function() {
|
||||
let elem = this.startNode()
|
||||
elem.value = {
|
||||
raw: this.input.slice(this.start, this.end),
|
||||
cooked: this.value
|
||||
}
|
||||
this.next()
|
||||
elem.tail = this.type === tt.backQuote
|
||||
return this.finishNode(elem, "TemplateElement")
|
||||
}
|
||||
|
||||
pp.parseTemplate = function() {
|
||||
let node = this.startNode()
|
||||
this.next()
|
||||
node.expressions = []
|
||||
let curElt = this.parseTemplateElement()
|
||||
node.quasis = [curElt]
|
||||
while (!curElt.tail) {
|
||||
this.expect(tt.dollarBraceL)
|
||||
node.expressions.push(this.parseExpression())
|
||||
this.expect(tt.braceR)
|
||||
node.quasis.push(curElt = this.parseTemplateElement())
|
||||
}
|
||||
this.next()
|
||||
return this.finishNode(node, "TemplateLiteral")
|
||||
}
|
||||
|
||||
// Parse an object literal or binding pattern.
|
||||
|
||||
pp.parseObj = function(isPattern, refShorthandDefaultPos) {
|
||||
let node = this.startNode(), first = true, propHash = {}
|
||||
node.properties = []
|
||||
this.next()
|
||||
while (!this.eat(tt.braceR)) {
|
||||
if (!first) {
|
||||
this.expect(tt.comma)
|
||||
if (this.afterTrailingComma(tt.braceR)) break
|
||||
} else first = false
|
||||
|
||||
let prop = this.startNode(), isGenerator, start
|
||||
if (this.options.ecmaVersion >= 6) {
|
||||
prop.method = false
|
||||
prop.shorthand = false
|
||||
if (isPattern || refShorthandDefaultPos)
|
||||
start = this.markPosition()
|
||||
if (!isPattern)
|
||||
isGenerator = this.eat(tt.star)
|
||||
}
|
||||
this.parsePropertyName(prop)
|
||||
if (this.eat(tt.colon)) {
|
||||
prop.value = isPattern ? this.parseMaybeDefault() : this.parseMaybeAssign(false, refShorthandDefaultPos)
|
||||
prop.kind = "init"
|
||||
} else if (this.options.ecmaVersion >= 6 && this.type === tt.parenL) {
|
||||
if (isPattern) this.unexpected()
|
||||
prop.kind = "init"
|
||||
prop.method = true
|
||||
prop.value = this.parseMethod(isGenerator)
|
||||
} else if (this.options.ecmaVersion >= 5 && !prop.computed && prop.key.type === "Identifier" &&
|
||||
(prop.key.name === "get" || prop.key.name === "set") &&
|
||||
(this.type != tt.comma && this.type != tt.braceR)) {
|
||||
if (isGenerator || isPattern) this.unexpected()
|
||||
prop.kind = prop.key.name
|
||||
this.parsePropertyName(prop)
|
||||
prop.value = this.parseMethod(false)
|
||||
} else if (this.options.ecmaVersion >= 6 && !prop.computed && prop.key.type === "Identifier") {
|
||||
prop.kind = "init"
|
||||
if (isPattern) {
|
||||
if (this.isKeyword(prop.key.name) ||
|
||||
(this.strict && (reservedWords.strictBind(prop.key.name) || reservedWords.strict(prop.key.name))) ||
|
||||
(!this.options.allowReserved && this.isReservedWord(prop.key.name)))
|
||||
this.raise(prop.key.start, "Binding " + prop.key.name)
|
||||
prop.value = this.parseMaybeDefault(start, prop.key)
|
||||
} else if (this.type === tt.eq && refShorthandDefaultPos) {
|
||||
if (!refShorthandDefaultPos.start)
|
||||
refShorthandDefaultPos.start = this.start
|
||||
prop.value = this.parseMaybeDefault(start, prop.key)
|
||||
} else {
|
||||
prop.value = prop.key
|
||||
}
|
||||
prop.shorthand = true
|
||||
} else this.unexpected()
|
||||
|
||||
this.checkPropClash(prop, propHash)
|
||||
node.properties.push(this.finishNode(prop, "Property"))
|
||||
}
|
||||
return this.finishNode(node, isPattern ? "ObjectPattern" : "ObjectExpression")
|
||||
}
|
||||
|
||||
pp.parsePropertyName = function(prop) {
|
||||
if (this.options.ecmaVersion >= 6) {
|
||||
if (this.eat(tt.bracketL)) {
|
||||
prop.computed = true
|
||||
prop.key = this.parseMaybeAssign()
|
||||
this.expect(tt.bracketR)
|
||||
return
|
||||
} else {
|
||||
prop.computed = false
|
||||
}
|
||||
}
|
||||
prop.key = (this.type === tt.num || this.type === tt.string) ? this.parseExprAtom() : this.parseIdent(true)
|
||||
}
|
||||
|
||||
// Initialize empty function node.
|
||||
|
||||
pp.initFunction = function(node) {
|
||||
node.id = null
|
||||
if (this.options.ecmaVersion >= 6) {
|
||||
node.generator = false
|
||||
node.expression = false
|
||||
}
|
||||
}
|
||||
|
||||
// Parse object or class method.
|
||||
|
||||
pp.parseMethod = function(isGenerator) {
|
||||
let node = this.startNode()
|
||||
this.initFunction(node)
|
||||
this.expect(tt.parenL)
|
||||
node.params = this.parseBindingList(tt.parenR, false, false)
|
||||
let allowExpressionBody
|
||||
if (this.options.ecmaVersion >= 6) {
|
||||
node.generator = isGenerator
|
||||
allowExpressionBody = true
|
||||
} else {
|
||||
allowExpressionBody = false
|
||||
}
|
||||
this.parseFunctionBody(node, allowExpressionBody)
|
||||
return this.finishNode(node, "FunctionExpression")
|
||||
}
|
||||
|
||||
// Parse arrow function expression with given parameters.
|
||||
|
||||
pp.parseArrowExpression = function(node, params) {
|
||||
this.initFunction(node)
|
||||
node.params = this.toAssignableList(params, true)
|
||||
this.parseFunctionBody(node, true)
|
||||
return this.finishNode(node, "ArrowFunctionExpression")
|
||||
}
|
||||
|
||||
// Parse function body and check parameters.
|
||||
|
||||
pp.parseFunctionBody = function(node, allowExpression) {
|
||||
let isExpression = allowExpression && this.type !== tt.braceL
|
||||
|
||||
if (isExpression) {
|
||||
node.body = this.parseMaybeAssign()
|
||||
node.expression = true
|
||||
} else {
|
||||
// Start a new scope with regard to labels and the `inFunction`
|
||||
// flag (restore them to their old value afterwards).
|
||||
let oldInFunc = this.inFunction, oldInGen = this.inGenerator, oldLabels = this.labels
|
||||
this.inFunction = true; this.inGenerator = node.generator; this.labels = []
|
||||
node.body = this.parseBlock(true)
|
||||
node.expression = false
|
||||
this.inFunction = oldInFunc; this.inGenerator = oldInGen; this.labels = oldLabels
|
||||
}
|
||||
|
||||
// If this is a strict mode function, verify that argument names
|
||||
// are not repeated, and it does not try to bind the words `eval`
|
||||
// or `arguments`.
|
||||
if (this.strict || !isExpression && node.body.body.length && this.isUseStrict(node.body.body[0])) {
|
||||
let nameHash = {}, oldStrict = this.strict
|
||||
this.strict = true
|
||||
if (node.id)
|
||||
this.checkLVal(node.id, true)
|
||||
for (let i = 0; i < node.params.length; i++)
|
||||
this.checkLVal(node.params[i], true, nameHash)
|
||||
this.strict = oldStrict
|
||||
}
|
||||
}
|
||||
|
||||
// Parses a comma-separated list of expressions, and returns them as
|
||||
// an array. `close` is the token type that ends the list, and
|
||||
// `allowEmpty` can be turned on to allow subsequent commas with
|
||||
// nothing in between them to be parsed as `null` (which is needed
|
||||
// for array literals).
|
||||
|
||||
pp.parseExprList = function(close, allowTrailingComma, allowEmpty, refShorthandDefaultPos) {
|
||||
let elts = [], first = true
|
||||
while (!this.eat(close)) {
|
||||
if (!first) {
|
||||
this.expect(tt.comma)
|
||||
if (allowTrailingComma && this.afterTrailingComma(close)) break
|
||||
} else first = false
|
||||
|
||||
if (allowEmpty && this.type === tt.comma) {
|
||||
elts.push(null)
|
||||
} else {
|
||||
if (this.type === tt.ellipsis)
|
||||
elts.push(this.parseSpread(refShorthandDefaultPos))
|
||||
else
|
||||
elts.push(this.parseMaybeAssign(false, refShorthandDefaultPos))
|
||||
}
|
||||
}
|
||||
return elts
|
||||
}
|
||||
|
||||
// Parse the next token as an identifier. If `liberal` is true (used
|
||||
// when parsing properties), it will also convert keywords into
|
||||
// identifiers.
|
||||
|
||||
pp.parseIdent = function(liberal) {
|
||||
let node = this.startNode()
|
||||
if (liberal && this.options.allowReserved == "never") liberal = false
|
||||
if (this.type === tt.name) {
|
||||
if (!liberal &&
|
||||
((!this.options.allowReserved && this.isReservedWord(this.value)) ||
|
||||
(this.strict && reservedWords.strict(this.value)) &&
|
||||
(this.options.ecmaVersion >= 6 ||
|
||||
this.input.slice(this.start, this.end).indexOf("\\") == -1)))
|
||||
this.raise(this.start, "The keyword '" + this.value + "' is reserved")
|
||||
node.name = this.value
|
||||
} else if (liberal && this.type.keyword) {
|
||||
node.name = this.type.keyword
|
||||
} else {
|
||||
this.unexpected()
|
||||
}
|
||||
this.next()
|
||||
return this.finishNode(node, "Identifier")
|
||||
}
|
||||
|
||||
// Parses yield expression inside generator.
|
||||
|
||||
pp.parseYield = function() {
|
||||
let node = this.startNode()
|
||||
this.next()
|
||||
if (this.type == tt.semi || this.canInsertSemicolon() || (this.type != tt.star && !this.type.startsExpr)) {
|
||||
node.delegate = false
|
||||
node.argument = null
|
||||
} else {
|
||||
node.delegate = this.eat(tt.star)
|
||||
node.argument = this.parseMaybeAssign()
|
||||
}
|
||||
return this.finishNode(node, "YieldExpression")
|
||||
}
|
||||
|
||||
// Parses array and generator comprehensions.
|
||||
|
||||
pp.parseComprehension = function(node, isGenerator) {
|
||||
node.blocks = []
|
||||
while (this.type === tt._for) {
|
||||
let block = this.startNode()
|
||||
this.next()
|
||||
this.expect(tt.parenL)
|
||||
block.left = this.parseBindingAtom()
|
||||
this.checkLVal(block.left, true)
|
||||
this.expectContextual("of")
|
||||
block.right = this.parseExpression()
|
||||
this.expect(tt.parenR)
|
||||
node.blocks.push(this.finishNode(block, "ComprehensionBlock"))
|
||||
}
|
||||
node.filter = this.eat(tt._if) ? this.parseParenExpression() : null
|
||||
node.body = this.parseExpression()
|
||||
this.expect(isGenerator ? tt.parenR : tt.bracketR)
|
||||
node.generator = isGenerator
|
||||
return this.finishNode(node, "ComprehensionExpression")
|
||||
}
|
||||
743
src/expression.js
Executable file
743
src/expression.js
Executable file
@ -0,0 +1,743 @@
|
||||
// A recursive descent parser operates by defining functions for all
|
||||
// syntactic elements, and recursively calling those, each function
|
||||
// advancing the input stream and returning an AST node. Precedence
|
||||
// of constructs (for example, the fact that `!x[1]` means `!(x[1])`
|
||||
// instead of `(!x)[1]` is handled by the fact that the parser
|
||||
// function that parses unary prefix operators is called first, and
|
||||
// in turn calls the function that parses `[]` subscripts — that
|
||||
// way, it'll receive the node for `x[1]` already parsed, and wraps
|
||||
// *that* in the unary operator node.
|
||||
//
|
||||
// Acorn uses an [operator precedence parser][opp] to handle binary
|
||||
// operator precedence, because it is much more compact than using
|
||||
// the technique outlined above, which uses different, nesting
|
||||
// functions to specify precedence, for all of the ten binary
|
||||
// precedence levels that JavaScript defines.
|
||||
//
|
||||
// [opp]: http://en.wikipedia.org/wiki/Operator-precedence_parser
|
||||
|
||||
import {types as tt} from "./tokentype"
|
||||
import {Parser} from "./state"
|
||||
import {reservedWords} from "./identifier"
|
||||
import {has} from "./util"
|
||||
|
||||
const pp = Parser.prototype
|
||||
|
||||
// Check if property name clashes with already added.
|
||||
// Object/class getters and setters are not allowed to clash —
|
||||
// either with each other or with an init property — and in
|
||||
// strict mode, init properties are also not allowed to be repeated.
|
||||
|
||||
pp.checkPropClash = function(prop, propHash) {
|
||||
if (this.options.ecmaVersion >= 6) return
|
||||
let key = prop.key, name
|
||||
switch (key.type) {
|
||||
case "Identifier": name = key.name; break
|
||||
case "Literal": name = String(key.value); break
|
||||
default: return
|
||||
}
|
||||
let kind = prop.kind || "init", other
|
||||
if (has(propHash, name)) {
|
||||
other = propHash[name]
|
||||
let isGetSet = kind !== "init"
|
||||
if ((this.strict || isGetSet) && other[kind] || !(isGetSet ^ other.init))
|
||||
this.raise(key.start, "Redefinition of property")
|
||||
} else {
|
||||
other = propHash[name] = {
|
||||
init: false,
|
||||
get: false,
|
||||
set: false
|
||||
}
|
||||
}
|
||||
other[kind] = true
|
||||
}
|
||||
|
||||
// ### Expression parsing
|
||||
|
||||
// These nest, from the most general expression type at the top to
|
||||
// 'atomic', nondivisible expression types at the bottom. Most of
|
||||
// the functions will simply let the function(s) below them parse,
|
||||
// and, *if* the syntactic construct they handle is present, wrap
|
||||
// the AST node that the inner parser gave them in another node.
|
||||
|
||||
// Parse a full expression. The optional arguments are used to
|
||||
// forbid the `in` operator (in for loops initalization expressions)
|
||||
// and provide reference for storing '=' operator inside shorthand
|
||||
// property assignment in contexts where both object expression
|
||||
// and object pattern might appear (so it's possible to raise
|
||||
// delayed syntax error at correct position).
|
||||
|
||||
pp.parseExpression = function(noIn, refShorthandDefaultPos) {
|
||||
let start = this.markPosition()
|
||||
let expr = this.parseMaybeAssign(noIn, refShorthandDefaultPos)
|
||||
if (this.type === tt.comma) {
|
||||
let node = this.startNodeAt(start)
|
||||
node.expressions = [expr]
|
||||
while (this.eat(tt.comma)) node.expressions.push(this.parseMaybeAssign(noIn, refShorthandDefaultPos))
|
||||
return this.finishNode(node, "SequenceExpression")
|
||||
}
|
||||
return expr
|
||||
}
|
||||
|
||||
// Parse an assignment expression. This includes applications of
|
||||
// operators like `+=`.
|
||||
|
||||
pp.parseMaybeAssign = function(noIn, refShorthandDefaultPos, afterLeftParse) {
|
||||
if (this.type == tt._yield && this.inGenerator) return this.parseYield()
|
||||
|
||||
let failOnShorthandAssign
|
||||
if (!refShorthandDefaultPos) {
|
||||
refShorthandDefaultPos = {start: 0}
|
||||
failOnShorthandAssign = true
|
||||
} else {
|
||||
failOnShorthandAssign = false
|
||||
}
|
||||
let start = this.markPosition()
|
||||
let left = this.parseMaybeConditional(noIn, refShorthandDefaultPos)
|
||||
if (afterLeftParse) left = afterLeftParse.call(this, left, start)
|
||||
if (this.type.isAssign) {
|
||||
let node = this.startNodeAt(start)
|
||||
node.operator = this.value
|
||||
node.left = this.type === tt.eq ? this.toAssignable(left) : left
|
||||
refShorthandDefaultPos.start = 0; // reset because shorthand default was used correctly
|
||||
this.checkLVal(left)
|
||||
this.next()
|
||||
node.right = this.parseMaybeAssign(noIn)
|
||||
return this.finishNode(node, "AssignmentExpression")
|
||||
} else if (failOnShorthandAssign && refShorthandDefaultPos.start) {
|
||||
this.unexpected(refShorthandDefaultPos.start)
|
||||
}
|
||||
return left
|
||||
}
|
||||
|
||||
// Parse a ternary conditional (`?:`) operator.
|
||||
|
||||
pp.parseMaybeConditional = function(noIn, refShorthandDefaultPos) {
|
||||
let start = this.markPosition()
|
||||
let expr = this.parseExprOps(noIn, refShorthandDefaultPos)
|
||||
if (refShorthandDefaultPos && refShorthandDefaultPos.start) return expr
|
||||
if (this.eat(tt.question)) {
|
||||
let node = this.startNodeAt(start)
|
||||
node.test = expr
|
||||
node.consequent = this.parseMaybeAssign()
|
||||
this.expect(tt.colon)
|
||||
node.alternate = this.parseMaybeAssign(noIn)
|
||||
return this.finishNode(node, "ConditionalExpression")
|
||||
}
|
||||
return expr
|
||||
}
|
||||
|
||||
// Start the precedence parser.
|
||||
|
||||
pp.parseExprOps = function(noIn, refShorthandDefaultPos) {
|
||||
let start = this.markPosition()
|
||||
let expr = this.parseMaybeUnary(refShorthandDefaultPos)
|
||||
if (refShorthandDefaultPos && refShorthandDefaultPos.start) return expr
|
||||
return this.parseExprOp(expr, start, -1, noIn)
|
||||
}
|
||||
|
||||
// Parse binary operators with the operator precedence parsing
|
||||
// algorithm. `left` is the left-hand side of the operator.
|
||||
// `minPrec` provides context that allows the function to stop and
|
||||
// defer further parser to one of its callers when it encounters an
|
||||
// operator that has a lower precedence than the set it is parsing.
|
||||
|
||||
pp.parseExprOp = function(left, leftStart, minPrec, noIn) {
|
||||
let prec = this.type.binop
|
||||
if (prec != null && (!noIn || this.type !== tt._in)) {
|
||||
if (prec > minPrec) {
|
||||
let node = this.startNodeAt(leftStart)
|
||||
node.left = left
|
||||
node.operator = this.value
|
||||
let op = this.type
|
||||
this.next()
|
||||
let start = this.markPosition()
|
||||
node.right = this.parseExprOp(this.parseMaybeUnary(), start, op.rightAssociative ? (prec - 1) : prec, noIn)
|
||||
this.finishNode(node, (op === tt.logicalOR || op === tt.logicalAND) ? "LogicalExpression" : "BinaryExpression")
|
||||
return this.parseExprOp(node, leftStart, minPrec, noIn)
|
||||
}
|
||||
}
|
||||
return left
|
||||
}
|
||||
|
||||
// Parse unary operators, both prefix and postfix.
|
||||
|
||||
pp.parseMaybeUnary = function(refShorthandDefaultPos) {
|
||||
if (this.type.prefix) {
|
||||
let node = this.startNode(), update = this.type === tt.incDec
|
||||
node.operator = this.value
|
||||
node.prefix = true
|
||||
this.next()
|
||||
node.argument = this.parseMaybeUnary()
|
||||
if (refShorthandDefaultPos && refShorthandDefaultPos.start) this.unexpected(refShorthandDefaultPos.start)
|
||||
if (update) this.checkLVal(node.argument)
|
||||
else if (this.strict && node.operator === "delete" &&
|
||||
node.argument.type === "Identifier")
|
||||
this.raise(node.start, "Deleting local variable in strict mode")
|
||||
return this.finishNode(node, update ? "UpdateExpression" : "UnaryExpression")
|
||||
}
|
||||
let start = this.markPosition()
|
||||
let expr = this.parseExprSubscripts(refShorthandDefaultPos)
|
||||
if (refShorthandDefaultPos && refShorthandDefaultPos.start) return expr
|
||||
while (this.type.postfix && !this.canInsertSemicolon()) {
|
||||
let node = this.startNodeAt(start)
|
||||
node.operator = this.value
|
||||
node.prefix = false
|
||||
node.argument = expr
|
||||
this.checkLVal(expr)
|
||||
this.next()
|
||||
expr = this.finishNode(node, "UpdateExpression")
|
||||
}
|
||||
return expr
|
||||
}
|
||||
|
||||
// Parse call, dot, and `[]`-subscript expressions.
|
||||
|
||||
pp.parseExprSubscripts = function(refShorthandDefaultPos) {
|
||||
let start = this.markPosition()
|
||||
let expr = this.parseExprAtom(refShorthandDefaultPos)
|
||||
if (refShorthandDefaultPos && refShorthandDefaultPos.start) return expr
|
||||
return this.parseSubscripts(expr, start)
|
||||
}
|
||||
|
||||
pp.parseSubscripts = function(base, start, noCalls) {
|
||||
if (this.eat(tt.dot)) {
|
||||
let node = this.startNodeAt(start)
|
||||
node.object = base
|
||||
node.property = this.parseIdent(true)
|
||||
node.computed = false
|
||||
return this.parseSubscripts(this.finishNode(node, "MemberExpression"), start, noCalls)
|
||||
} else if (this.eat(tt.bracketL)) {
|
||||
let node = this.startNodeAt(start)
|
||||
node.object = base
|
||||
node.property = this.parseExpression()
|
||||
node.computed = true
|
||||
this.expect(tt.bracketR)
|
||||
return this.parseSubscripts(this.finishNode(node, "MemberExpression"), start, noCalls)
|
||||
} else if (!noCalls && this.eat(tt.parenL)) {
|
||||
let node = this.startNodeAt(start)
|
||||
node.callee = base
|
||||
node.arguments = this.parseExprList(tt.parenR, false)
|
||||
return this.parseSubscripts(this.finishNode(node, "CallExpression"), start, noCalls)
|
||||
} else if (this.type === tt.backQuote) {
|
||||
let node = this.startNodeAt(start)
|
||||
node.tag = base
|
||||
node.quasi = this.parseTemplate()
|
||||
return this.parseSubscripts(this.finishNode(node, "TaggedTemplateExpression"), start, noCalls)
|
||||
} return base
|
||||
}
|
||||
|
||||
// Parse an atomic expression — either a single token that is an
|
||||
// expression, an expression started by a keyword like `function` or
|
||||
// `new`, or an expression wrapped in punctuation like `()`, `[]`,
|
||||
// or `{}`.
|
||||
|
||||
pp.parseExprAtom = function(refShorthandDefaultPos) {
|
||||
let node
|
||||
switch (this.type) {
|
||||
case tt._this:
|
||||
case tt._super:
|
||||
let type = this.type === tt._this ? "ThisExpression" : "Super"
|
||||
node = this.startNode()
|
||||
this.next()
|
||||
return this.finishNode(node, type)
|
||||
|
||||
case tt._yield:
|
||||
if (this.inGenerator) unexpected()
|
||||
|
||||
case tt.name:
|
||||
let start = this.markPosition()
|
||||
node = this.startNode()
|
||||
let id = this.parseIdent(this.type !== tt.name)
|
||||
|
||||
//
|
||||
if (this.options.features["es7.asyncFunctions"]) {
|
||||
// async functions!
|
||||
if (id.name === "async") {
|
||||
// arrow functions
|
||||
if (this.type === tt.parenL) {
|
||||
let expr = this.parseParenAndDistinguishExpression(start, true)
|
||||
if (expr.type === "ArrowFunctionExpression") {
|
||||
return expr
|
||||
} else {
|
||||
node.callee = id
|
||||
if (expr.type === "SequenceExpression") {
|
||||
node.arguments = expr.expressions
|
||||
} else {
|
||||
node.arguments = [expr]
|
||||
}
|
||||
return this.parseSubscripts(this.finishNode(node, "CallExpression"), start)
|
||||
}
|
||||
} else if (this.type === tt.name) {
|
||||
id = this.parseIdent()
|
||||
this.expect(tt.arrow)
|
||||
return this.parseArrowExpression(node, [id], true)
|
||||
}
|
||||
|
||||
// normal functions
|
||||
if (this.type === tt._function && !this.canInsertSemicolon()) {
|
||||
this.next()
|
||||
return this.parseFunction(node, false, false, true)
|
||||
}
|
||||
} else if (id.name === "await") {
|
||||
if (this.inAsync) return this.parseAwait(node)
|
||||
}
|
||||
}
|
||||
//
|
||||
|
||||
if (!this.canInsertSemicolon() && this.eat(tt.arrow)) {
|
||||
return this.parseArrowExpression(this.startNodeAt(start), [id])
|
||||
}
|
||||
return id
|
||||
|
||||
case tt.regexp:
|
||||
let value = this.value
|
||||
node = this.parseLiteral(value.value)
|
||||
node.regex = {pattern: value.pattern, flags: value.flags}
|
||||
return node
|
||||
|
||||
case tt.num: case tt.string:
|
||||
return this.parseLiteral(this.value)
|
||||
|
||||
case tt._null: case tt._true: case tt._false:
|
||||
node = this.startNode()
|
||||
node.value = this.type === tt._null ? null : this.type === tt._true
|
||||
node.raw = this.type.keyword
|
||||
this.next()
|
||||
return this.finishNode(node, "Literal")
|
||||
|
||||
case tt.parenL:
|
||||
return this.parseParenAndDistinguishExpression()
|
||||
|
||||
case tt.bracketL:
|
||||
node = this.startNode()
|
||||
this.next()
|
||||
// check whether this is array comprehension or regular array
|
||||
if ((this.options.ecmaVersion >= 7 || this.options.features["es7.comprehensions"]) && this.type === tt._for) {
|
||||
return this.parseComprehension(node, false)
|
||||
}
|
||||
node.elements = this.parseExprList(tt.bracketR, true, true, refShorthandDefaultPos)
|
||||
return this.finishNode(node, "ArrayExpression")
|
||||
|
||||
case tt.braceL:
|
||||
return this.parseObj(false, refShorthandDefaultPos)
|
||||
|
||||
case tt._function:
|
||||
node = this.startNode()
|
||||
this.next()
|
||||
return this.parseFunction(node, false)
|
||||
|
||||
case tt._class:
|
||||
return this.parseClass(this.startNode(), false)
|
||||
|
||||
case tt._new:
|
||||
return this.parseNew()
|
||||
|
||||
case tt.backQuote:
|
||||
return this.parseTemplate()
|
||||
|
||||
default:
|
||||
this.unexpected()
|
||||
}
|
||||
}
|
||||
|
||||
pp.parseLiteral = function(value) {
|
||||
let node = this.startNode()
|
||||
node.value = value
|
||||
node.raw = this.input.slice(this.start, this.end)
|
||||
this.next()
|
||||
return this.finishNode(node, "Literal")
|
||||
}
|
||||
|
||||
pp.parseParenExpression = function() {
|
||||
this.expect(tt.parenL)
|
||||
let val = this.parseExpression()
|
||||
this.expect(tt.parenR)
|
||||
return val
|
||||
}
|
||||
|
||||
pp.parseParenAndDistinguishExpression = function(start, isAsync) {
|
||||
start = start || this.markPosition()
|
||||
let val
|
||||
if (this.options.ecmaVersion >= 6) {
|
||||
this.next()
|
||||
|
||||
if ((this.options.features["es7.comprehensions"] || this.options.ecmaVersion >= 7) && this.type === tt._for) {
|
||||
return this.parseComprehension(this.startNodeAt(start), true)
|
||||
}
|
||||
|
||||
let innerStart = this.markPosition(), exprList = [], first = true
|
||||
let refShorthandDefaultPos = {start: 0}, spreadStart, innerParenStart
|
||||
while (this.type !== tt.parenR) {
|
||||
first ? first = false : this.expect(tt.comma)
|
||||
if (this.type === tt.ellipsis) {
|
||||
let spreadNodeStart = this.markPosition()
|
||||
spreadStart = this.start
|
||||
exprList.push(this.parseParenItem(this.parseRest(), spreadNodeStart))
|
||||
break
|
||||
} else {
|
||||
if (this.type === tt.parenL && !innerParenStart) {
|
||||
innerParenStart = this.start
|
||||
}
|
||||
exprList.push(this.parseMaybeAssign(false, refShorthandDefaultPos, this.parseParenItem))
|
||||
}
|
||||
}
|
||||
let innerEnd = this.markPosition()
|
||||
this.expect(tt.parenR)
|
||||
|
||||
if (!this.canInsertSemicolon() && this.eat(tt.arrow)) {
|
||||
if (innerParenStart) this.unexpected(innerParenStart)
|
||||
return this.parseParenArrowList(start, exprList, isAsync)
|
||||
}
|
||||
|
||||
if (!exprList.length) this.unexpected(this.lastTokStart)
|
||||
if (spreadStart) this.unexpected(spreadStart)
|
||||
if (refShorthandDefaultPos.start) this.unexpected(refShorthandDefaultPos.start)
|
||||
|
||||
if (exprList.length > 1) {
|
||||
val = this.startNodeAt(innerStart)
|
||||
val.expressions = exprList
|
||||
this.finishNodeAt(val, "SequenceExpression", innerEnd)
|
||||
} else {
|
||||
val = exprList[0]
|
||||
}
|
||||
} else {
|
||||
val = this.parseParenExpression()
|
||||
}
|
||||
|
||||
if (this.options.preserveParens) {
|
||||
let par = this.startNodeAt(start)
|
||||
par.expression = val
|
||||
return this.finishNode(par, "ParenthesizedExpression")
|
||||
} else {
|
||||
return val
|
||||
}
|
||||
}
|
||||
|
||||
pp.parseParenArrowList = function(start, exprList, isAsync) {
|
||||
return this.parseArrowExpression(this.startNodeAt(start), exprList, isAsync)
|
||||
}
|
||||
|
||||
pp.parseParenItem = function(node, start) {
|
||||
return node
|
||||
}
|
||||
|
||||
// New's precedence is slightly tricky. It must allow its argument
|
||||
// to be a `[]` or dot subscript expression, but not a call — at
|
||||
// least, not without wrapping it in parentheses. Thus, it uses the
|
||||
|
||||
const empty = []
|
||||
|
||||
pp.parseNew = function() {
|
||||
let node = this.startNode()
|
||||
let meta = this.parseIdent(true)
|
||||
if (this.options.ecmaVersion >= 6 && this.eat(tt.dot)) {
|
||||
node.meta = meta
|
||||
node.property = this.parseIdent(true)
|
||||
if (node.property.name !== "target")
|
||||
this.raise(node.property.start, "The only valid meta property for new is new.target")
|
||||
return this.finishNode(node, "MetaProperty")
|
||||
}
|
||||
let start = this.markPosition()
|
||||
node.callee = this.parseSubscripts(this.parseExprAtom(), start, true)
|
||||
if (this.eat(tt.parenL)) node.arguments = this.parseExprList(tt.parenR, false)
|
||||
else node.arguments = empty
|
||||
return this.finishNode(node, "NewExpression")
|
||||
}
|
||||
|
||||
// Parse template expression.
|
||||
|
||||
pp.parseTemplateElement = function() {
|
||||
let elem = this.startNode()
|
||||
elem.value = {
|
||||
raw: this.input.slice(this.start, this.end),
|
||||
cooked: this.value
|
||||
}
|
||||
this.next()
|
||||
elem.tail = this.type === tt.backQuote
|
||||
return this.finishNode(elem, "TemplateElement")
|
||||
}
|
||||
|
||||
pp.parseTemplate = function() {
|
||||
let node = this.startNode()
|
||||
this.next()
|
||||
node.expressions = []
|
||||
let curElt = this.parseTemplateElement()
|
||||
node.quasis = [curElt]
|
||||
while (!curElt.tail) {
|
||||
this.expect(tt.dollarBraceL)
|
||||
node.expressions.push(this.parseExpression())
|
||||
this.expect(tt.braceR)
|
||||
node.quasis.push(curElt = this.parseTemplateElement())
|
||||
}
|
||||
this.next()
|
||||
return this.finishNode(node, "TemplateLiteral")
|
||||
}
|
||||
|
||||
// Parse an object literal or binding pattern.
|
||||
|
||||
pp.parseObj = function(isPattern, refShorthandDefaultPos) {
|
||||
let node = this.startNode(), first = true, propHash = {}
|
||||
node.properties = []
|
||||
this.next()
|
||||
while (!this.eat(tt.braceR)) {
|
||||
if (!first) {
|
||||
this.expect(tt.comma)
|
||||
if (this.afterTrailingComma(tt.braceR)) break
|
||||
} else first = false
|
||||
|
||||
let prop = this.startNode(), isGenerator = false, isAsync = false, start
|
||||
if (this.options.features["es7.objectRestSpread"] && this.type === tt.ellipsis) {
|
||||
prop = this.parseSpread()
|
||||
prop.type = "SpreadProperty"
|
||||
node.properties.push(prop)
|
||||
continue
|
||||
}
|
||||
if (this.options.ecmaVersion >= 6) {
|
||||
prop.method = false
|
||||
prop.shorthand = false
|
||||
if (isPattern || refShorthandDefaultPos)
|
||||
start = this.markPosition()
|
||||
if (!isPattern)
|
||||
isGenerator = this.eat(tt.star)
|
||||
}
|
||||
if (this.options.features["es7.asyncFunctions"] && this.isContextual("async")) {
|
||||
if (isGenerator || isPattern) this.unexpected()
|
||||
var asyncId = this.parseIdent()
|
||||
if (this.type === tt.colon || this.type === tt.parenL) {
|
||||
prop.key = asyncId
|
||||
} else {
|
||||
isAsync = true
|
||||
this.parsePropertyName(prop)
|
||||
}
|
||||
} else {
|
||||
this.parsePropertyName(prop)
|
||||
}
|
||||
this.parseObjPropValue(prop, start, isGenerator, isAsync, isPattern, refShorthandDefaultPos);
|
||||
this.checkPropClash(prop, propHash)
|
||||
node.properties.push(this.finishNode(prop, "Property"))
|
||||
}
|
||||
return this.finishNode(node, isPattern ? "ObjectPattern" : "ObjectExpression")
|
||||
}
|
||||
|
||||
pp.parseObjPropValue = function (prop, start, isGenerator, isAsync, isPattern, refShorthandDefaultPos) {
|
||||
if (this.eat(tt.colon)) {
|
||||
prop.value = isPattern ? this.parseMaybeDefault() : this.parseMaybeAssign(false, refShorthandDefaultPos)
|
||||
prop.kind = "init"
|
||||
} else if (this.options.ecmaVersion >= 6 && this.type === tt.parenL) {
|
||||
if (isPattern) this.unexpected()
|
||||
prop.kind = "init"
|
||||
prop.method = true
|
||||
prop.value = this.parseMethod(isGenerator, isAsync)
|
||||
} else if (this.options.ecmaVersion >= 5 && !prop.computed && prop.key.type === "Identifier" &&
|
||||
(prop.key.name === "get" || prop.key.name === "set") &&
|
||||
(this.type != tt.comma && this.type != tt.braceR)) {
|
||||
if (isGenerator || isAsync || isPattern) this.unexpected()
|
||||
prop.kind = prop.key.name
|
||||
this.parsePropertyName(prop)
|
||||
prop.value = this.parseMethod(false)
|
||||
} else if (this.options.ecmaVersion >= 6 && !prop.computed && prop.key.type === "Identifier") {
|
||||
prop.kind = "init"
|
||||
if (isPattern) {
|
||||
if (this.isKeyword(prop.key.name) ||
|
||||
(this.strict && (reservedWords.strictBind(prop.key.name) || reservedWords.strict(prop.key.name))) ||
|
||||
(!this.options.allowReserved && this.isReservedWord(prop.key.name)))
|
||||
this.raise(prop.key.start, "Binding " + prop.key.name)
|
||||
prop.value = this.parseMaybeDefault(start, prop.key)
|
||||
} else if (this.type === tt.eq && refShorthandDefaultPos) {
|
||||
if (!refShorthandDefaultPos.start)
|
||||
refShorthandDefaultPos.start = this.start
|
||||
prop.value = this.parseMaybeDefault(start, prop.key)
|
||||
} else {
|
||||
prop.value = prop.key
|
||||
}
|
||||
prop.shorthand = true
|
||||
} else this.unexpected()
|
||||
}
|
||||
|
||||
pp.parsePropertyName = function(prop) {
|
||||
if (this.options.ecmaVersion >= 6) {
|
||||
if (this.eat(tt.bracketL)) {
|
||||
prop.computed = true
|
||||
prop.key = this.parseMaybeAssign()
|
||||
this.expect(tt.bracketR)
|
||||
return
|
||||
} else {
|
||||
prop.computed = false
|
||||
}
|
||||
}
|
||||
prop.key = (this.type === tt.num || this.type === tt.string) ? this.parseExprAtom() : this.parseIdent(true)
|
||||
}
|
||||
|
||||
// Initialize empty function node.
|
||||
|
||||
pp.initFunction = function(node, isAsync) {
|
||||
node.id = null
|
||||
if (this.options.ecmaVersion >= 6) {
|
||||
node.generator = false
|
||||
node.expression = false
|
||||
}
|
||||
if (this.options.features["es7.asyncFunctions"]) {
|
||||
node.async = !!isAsync
|
||||
}
|
||||
}
|
||||
|
||||
// Parse object or class method.
|
||||
|
||||
pp.parseMethod = function(isGenerator, isAsync) {
|
||||
let node = this.startNode()
|
||||
this.initFunction(node, isAsync)
|
||||
this.expect(tt.parenL)
|
||||
node.params = this.parseBindingList(tt.parenR, false, false)
|
||||
let allowExpressionBody
|
||||
if (this.options.ecmaVersion >= 6) {
|
||||
node.generator = isGenerator
|
||||
allowExpressionBody = true
|
||||
} else {
|
||||
allowExpressionBody = false
|
||||
}
|
||||
this.parseFunctionBody(node, allowExpressionBody)
|
||||
return this.finishNode(node, "FunctionExpression")
|
||||
}
|
||||
|
||||
// Parse arrow function expression with given parameters.
|
||||
|
||||
pp.parseArrowExpression = function(node, params, isAsync) {
|
||||
this.initFunction(node, isAsync)
|
||||
node.params = this.toAssignableList(params, true)
|
||||
this.parseFunctionBody(node, true)
|
||||
return this.finishNode(node, "ArrowFunctionExpression")
|
||||
}
|
||||
|
||||
// Parse function body and check parameters.
|
||||
|
||||
pp.parseFunctionBody = function(node, allowExpression) {
|
||||
let isExpression = allowExpression && this.type !== tt.braceL
|
||||
|
||||
var oldInAsync = this.inAsync
|
||||
this.inAsync = node.async
|
||||
if (isExpression) {
|
||||
node.body = this.parseMaybeAssign()
|
||||
node.expression = true
|
||||
} else {
|
||||
// Start a new scope with regard to labels and the `inFunction`
|
||||
// flag (restore them to their old value afterwards).
|
||||
let oldInFunc = this.inFunction, oldInGen = this.inGenerator, oldLabels = this.labels
|
||||
this.inFunction = true; this.inGenerator = node.generator; this.labels = []
|
||||
node.body = this.parseBlock(true)
|
||||
node.expression = false
|
||||
this.inFunction = oldInFunc; this.inGenerator = oldInGen; this.labels = oldLabels
|
||||
}
|
||||
this.inAsync = oldInAsync
|
||||
|
||||
// If this is a strict mode function, verify that argument names
|
||||
// are not repeated, and it does not try to bind the words `eval`
|
||||
// or `arguments`.
|
||||
if (this.strict || !isExpression && node.body.body.length && this.isUseStrict(node.body.body[0])) {
|
||||
let nameHash = {}, oldStrict = this.strict
|
||||
this.strict = true
|
||||
if (node.id)
|
||||
this.checkLVal(node.id, true)
|
||||
for (let i = 0; i < node.params.length; i++)
|
||||
this.checkLVal(node.params[i], true, nameHash)
|
||||
this.strict = oldStrict
|
||||
}
|
||||
}
|
||||
|
||||
// Parses a comma-separated list of expressions, and returns them as
|
||||
// an array. `close` is the token type that ends the list, and
|
||||
// `allowEmpty` can be turned on to allow subsequent commas with
|
||||
// nothing in between them to be parsed as `null` (which is needed
|
||||
// for array literals).
|
||||
|
||||
pp.parseExprList = function(close, allowTrailingComma, allowEmpty, refShorthandDefaultPos) {
|
||||
let elts = [], first = true
|
||||
while (!this.eat(close)) {
|
||||
if (!first) {
|
||||
this.expect(tt.comma)
|
||||
if (allowTrailingComma && this.afterTrailingComma(close)) break
|
||||
} else first = false
|
||||
|
||||
if (allowEmpty && this.type === tt.comma) {
|
||||
elts.push(null)
|
||||
} else {
|
||||
if (this.type === tt.ellipsis)
|
||||
elts.push(this.parseSpread(refShorthandDefaultPos))
|
||||
else
|
||||
elts.push(this.parseMaybeAssign(false, refShorthandDefaultPos))
|
||||
}
|
||||
}
|
||||
return elts
|
||||
}
|
||||
|
||||
// Parse the next token as an identifier. If `liberal` is true (used
|
||||
// when parsing properties), it will also convert keywords into
|
||||
// identifiers.
|
||||
|
||||
pp.parseIdent = function(liberal) {
|
||||
let node = this.startNode()
|
||||
if (liberal && this.options.allowReserved == "never") liberal = false
|
||||
if (this.type === tt.name) {
|
||||
if (!liberal &&
|
||||
((!this.options.allowReserved && this.isReservedWord(this.value)) ||
|
||||
(this.strict && reservedWords.strict(this.value)) &&
|
||||
(this.options.ecmaVersion >= 6 ||
|
||||
this.input.slice(this.start, this.end).indexOf("\\") == -1)))
|
||||
this.raise(this.start, "The keyword '" + this.value + "' is reserved")
|
||||
node.name = this.value
|
||||
} else if (liberal && this.type.keyword) {
|
||||
node.name = this.type.keyword
|
||||
} else {
|
||||
this.unexpected()
|
||||
}
|
||||
this.next()
|
||||
return this.finishNode(node, "Identifier")
|
||||
}
|
||||
|
||||
// Parses await expression inside async function.
|
||||
|
||||
pp.parseAwait = function (node) {
|
||||
if (this.eat(tt.semi) || this.canInsertSemicolon()) {
|
||||
this.unexpected()
|
||||
}
|
||||
node.all = this.eat(tt.star)
|
||||
node.argument = this.parseMaybeAssign(true)
|
||||
return this.finishNode(node, "AwaitExpression")
|
||||
};
|
||||
|
||||
// Parses yield expression inside generator.
|
||||
|
||||
pp.parseYield = function() {
|
||||
let node = this.startNode()
|
||||
this.next()
|
||||
if (this.type == tt.semi || this.canInsertSemicolon() || (this.type != tt.star && !this.type.startsExpr)) {
|
||||
node.delegate = false
|
||||
node.argument = null
|
||||
} else {
|
||||
node.delegate = this.eat(tt.star)
|
||||
node.argument = this.parseMaybeAssign()
|
||||
}
|
||||
return this.finishNode(node, "YieldExpression")
|
||||
}
|
||||
|
||||
// Parses array and generator comprehensions.
|
||||
|
||||
pp.parseComprehension = function(node, isGenerator) {
|
||||
node.blocks = []
|
||||
while (this.type === tt._for) {
|
||||
let block = this.startNode()
|
||||
this.next()
|
||||
this.expect(tt.parenL)
|
||||
block.left = this.parseBindingAtom()
|
||||
this.checkLVal(block.left, true)
|
||||
this.expectContextual("of")
|
||||
block.right = this.parseExpression()
|
||||
this.expect(tt.parenR)
|
||||
node.blocks.push(this.finishNode(block, "ComprehensionBlock"))
|
||||
}
|
||||
node.filter = this.eat(tt._if) ? this.parseParenExpression() : null
|
||||
node.body = this.parseExpression()
|
||||
this.expect(isGenerator ? tt.parenR : tt.bracketR)
|
||||
node.generator = isGenerator
|
||||
return this.finishNode(node, "ComprehensionExpression")
|
||||
}
|
||||
129
src/identifier.js
Executable file
129
src/identifier.js
Executable file
@ -0,0 +1,129 @@
|
||||
// This is a trick taken from Esprima. It turns out that, on
|
||||
// non-Chrome browsers, to check whether a string is in a set, a
|
||||
// predicate containing a big ugly `switch` statement is faster than
|
||||
// a regular expression, and on Chrome the two are about on par.
|
||||
// This function uses `eval` (non-lexical) to produce such a
|
||||
// predicate from a space-separated string of words.
|
||||
//
|
||||
// It starts by sorting the words by length.
|
||||
|
||||
function makePredicate(words) {
|
||||
words = words.split(" ")
|
||||
let f = "", cats = []
|
||||
out: for (let i = 0; i < words.length; ++i) {
|
||||
for (let j = 0; j < cats.length; ++j)
|
||||
if (cats[j][0].length == words[i].length) {
|
||||
cats[j].push(words[i])
|
||||
continue out
|
||||
}
|
||||
cats.push([words[i]])
|
||||
}
|
||||
function compareTo(arr) {
|
||||
if (arr.length == 1) return f += "return str === " + JSON.stringify(arr[0]) + ";"
|
||||
f += "switch(str){"
|
||||
for (let i = 0; i < arr.length; ++i) f += "case " + JSON.stringify(arr[i]) + ":"
|
||||
f += "return true}return false;"
|
||||
}
|
||||
|
||||
// When there are more than three length categories, an outer
|
||||
// switch first dispatches on the lengths, to save on comparisons.
|
||||
|
||||
if (cats.length > 3) {
|
||||
cats.sort((a, b) => b.length - a.length)
|
||||
f += "switch(str.length){"
|
||||
for (let i = 0; i < cats.length; ++i) {
|
||||
let cat = cats[i]
|
||||
f += "case " + cat[0].length + ":"
|
||||
compareTo(cat)
|
||||
}
|
||||
f += "}"
|
||||
|
||||
// Otherwise, simply generate a flat `switch` statement.
|
||||
|
||||
} else {
|
||||
compareTo(words)
|
||||
}
|
||||
return new Function("str", f)
|
||||
}
|
||||
|
||||
// Reserved word lists for various dialects of the language
|
||||
|
||||
export const reservedWords = {
|
||||
3: makePredicate("abstract boolean byte char class double enum export extends final float goto implements import int interface long native package private protected public short static super synchronized throws transient volatile"),
|
||||
5: makePredicate("class enum extends super const export import"),
|
||||
6: makePredicate("enum await"),
|
||||
strict: makePredicate("implements interface let package private protected public static yield"),
|
||||
strictBind: makePredicate("eval arguments")
|
||||
}
|
||||
|
||||
// And the keywords
|
||||
|
||||
var ecma5AndLessKeywords = "break case catch continue debugger default do else finally for function if return switch throw try var while with null true false instanceof typeof void delete new in this"
|
||||
|
||||
export const keywords = {
|
||||
5: makePredicate(ecma5AndLessKeywords),
|
||||
6: makePredicate(ecma5AndLessKeywords + " let const class extends export import yield super")
|
||||
}
|
||||
|
||||
// ## Character categories
|
||||
|
||||
// Big ugly regular expressions that match characters in the
|
||||
// whitespace, identifier, and identifier-start categories. These
|
||||
// are only applied when a character is found to actually have a
|
||||
// code point above 128.
|
||||
// Generated by `tools/generate-identifier-regex.js`.
|
||||
|
||||
let nonASCIIidentifierStartChars = "\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376\u0377\u037a-\u037d\u037f\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u052f\u0531-\u0556\u0559\u0561-\u0587\u05d0-\u05ea\u05f0-\u05f2\u0620-\u064a\u066e\u066f\u0671-\u06d3\u06d5\u06e5\u06e6\u06ee\u06ef\u06fa-\u06fc\u06ff\u0710\u0712-\u072f\u074d-\u07a5\u07b1\u07ca-\u07ea\u07f4\u07f5\u07fa\u0800-\u0815\u081a\u0824\u0828\u0840-\u0858\u08a0-\u08b2\u0904-\u0939\u093d\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bd\u09ce\u09dc\u09dd\u09df-\u09e1\u09f0\u09f1\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abd\u0ad0\u0ae0\u0ae1\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3d\u0b5c\u0b5d\u0b5f-\u0b61\u0b71\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bd0\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c39\u0c3d\u0c58\u0c59\u0c60\u0c61\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\u0cde\u0ce0\u0ce1\u0cf1\u0cf2\u0d05-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d\u0d4e\u0d60\u0d61\u0d7a-\u0d7f\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0e01-\u0e30\u0e32\u0e33\u0e40-\u0e46\u0e81\u0e82\u0e84\u0e87\u0e88\u0e8a\u0e8d\u0e94-\u0e97\u0e99-\u0e9f\u0ea1-\u0ea3\u0ea5\u0ea7\u0eaa\u0eab\u0ead-\u0eb0\u0eb2\u0eb3\u0ebd\u0ec0-\u0ec4\u0ec6\u0edc-\u0edf\u0f00\u0f40-\u0f47\u0f49-\u0f6c\u0f88-\u0f8c\u1000-\u102a\u103f\u1050-\u1055\u105a-\u105d\u1061\u1065\u1066\u106e-\u1070\u1075-\u1081\u108e\u10a0-\u10c5\u10c7\u10cd\u10d0-\u10fa\u10fc-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u1380-\u138f\u13a0-\u13f4\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f8\u1700-\u170c\u170e-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17d7\u17dc\u1820-\u1877\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191e\u1950-\u196d\u1970-\u1974\u1980-\u19ab\u19c1-\u19c7\u1a00-\u1a16\u1a20-\u1a54\u1aa7\u1b05-\u1b33\u1b45-\u1b4b\u1b83-\u1ba0\u1bae\u1baf\u1bba-\u1be5\u1c00-\u1c23\u1c4d-\u1c4f\u1c5a-\u1c7d\u1ce9-\u1cec\u1cee-\u1cf1\u1cf5\u1cf6\u1d00-\u1dbf\u1e00-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u2071\u207f\u2090-\u209c\u2102\u2107\u210a-\u2113\u2115\u2118-\u211d\u2124\u2126\u2128\u212a-\u2139\u213c-\u213f\u2145-\u2149\u214e\u2160-\u2188\u2c00-\u2c2e\u2c30-\u2c5e\u2c60-\u2ce4\u2ceb-\u2cee\u2cf2\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d80-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303c\u3041-\u3096\u309b-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312d\u3131-\u318e\u31a0-\u31ba\u31f0-\u31ff\u3400-\u4db5\u4e00-\u9fcc\ua000-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a\ua62b\ua640-\ua66e\ua67f-\ua69d\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua78e\ua790-\ua7ad\ua7b0\ua7b1\ua7f7-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua90a-\ua925\ua930-\ua946\ua960-\ua97c\ua984-\ua9b2\ua9cf\ua9e0-\ua9e4\ua9e6-\ua9ef\ua9fa-\ua9fe\uaa00-\uaa28\uaa40-\uaa42\uaa44-\uaa4b\uaa60-\uaa76\uaa7a\uaa7e-\uaaaf\uaab1\uaab5\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaadd\uaae0-\uaaea\uaaf2-\uaaf4\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uab30-\uab5a\uab5c-\uab5f\uab64\uab65\uabc0-\uabe2\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d\ufb1f-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40\ufb41\ufb43\ufb44\ufb46-\ufbb1\ufbd3-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdfb\ufe70-\ufe74\ufe76-\ufefc\uff21-\uff3a\uff41-\uff5a\uff66-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc"
|
||||
let nonASCIIidentifierChars = "\u200c\u200d\xb7\u0300-\u036f\u0387\u0483-\u0487\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u0669\u0670\u06d6-\u06dc\u06df-\u06e4\u06e7\u06e8\u06ea-\u06ed\u06f0-\u06f9\u0711\u0730-\u074a\u07a6-\u07b0\u07c0-\u07c9\u07eb-\u07f3\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0859-\u085b\u08e4-\u0903\u093a-\u093c\u093e-\u094f\u0951-\u0957\u0962\u0963\u0966-\u096f\u0981-\u0983\u09bc\u09be-\u09c4\u09c7\u09c8\u09cb-\u09cd\u09d7\u09e2\u09e3\u09e6-\u09ef\u0a01-\u0a03\u0a3c\u0a3e-\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a66-\u0a71\u0a75\u0a81-\u0a83\u0abc\u0abe-\u0ac5\u0ac7-\u0ac9\u0acb-\u0acd\u0ae2\u0ae3\u0ae6-\u0aef\u0b01-\u0b03\u0b3c\u0b3e-\u0b44\u0b47\u0b48\u0b4b-\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b66-\u0b6f\u0b82\u0bbe-\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcd\u0bd7\u0be6-\u0bef\u0c00-\u0c03\u0c3e-\u0c44\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0c66-\u0c6f\u0c81-\u0c83\u0cbc\u0cbe-\u0cc4\u0cc6-\u0cc8\u0cca-\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0ce6-\u0cef\u0d01-\u0d03\u0d3e-\u0d44\u0d46-\u0d48\u0d4a-\u0d4d\u0d57\u0d62\u0d63\u0d66-\u0d6f\u0d82\u0d83\u0dca\u0dcf-\u0dd4\u0dd6\u0dd8-\u0ddf\u0de6-\u0def\u0df2\u0df3\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0e50-\u0e59\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0ed0-\u0ed9\u0f18\u0f19\u0f20-\u0f29\u0f35\u0f37\u0f39\u0f3e\u0f3f\u0f71-\u0f84\u0f86\u0f87\u0f8d-\u0f97\u0f99-\u0fbc\u0fc6\u102b-\u103e\u1040-\u1049\u1056-\u1059\u105e-\u1060\u1062-\u1064\u1067-\u106d\u1071-\u1074\u1082-\u108d\u108f-\u109d\u135d-\u135f\u1369-\u1371\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b4-\u17d3\u17dd\u17e0-\u17e9\u180b-\u180d\u1810-\u1819\u18a9\u1920-\u192b\u1930-\u193b\u1946-\u194f\u19b0-\u19c0\u19c8\u19c9\u19d0-\u19da\u1a17-\u1a1b\u1a55-\u1a5e\u1a60-\u1a7c\u1a7f-\u1a89\u1a90-\u1a99\u1ab0-\u1abd\u1b00-\u1b04\u1b34-\u1b44\u1b50-\u1b59\u1b6b-\u1b73\u1b80-\u1b82\u1ba1-\u1bad\u1bb0-\u1bb9\u1be6-\u1bf3\u1c24-\u1c37\u1c40-\u1c49\u1c50-\u1c59\u1cd0-\u1cd2\u1cd4-\u1ce8\u1ced\u1cf2-\u1cf4\u1cf8\u1cf9\u1dc0-\u1df5\u1dfc-\u1dff\u203f\u2040\u2054\u20d0-\u20dc\u20e1\u20e5-\u20f0\u2cef-\u2cf1\u2d7f\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua620-\ua629\ua66f\ua674-\ua67d\ua69f\ua6f0\ua6f1\ua802\ua806\ua80b\ua823-\ua827\ua880\ua881\ua8b4-\ua8c4\ua8d0-\ua8d9\ua8e0-\ua8f1\ua900-\ua909\ua926-\ua92d\ua947-\ua953\ua980-\ua983\ua9b3-\ua9c0\ua9d0-\ua9d9\ua9e5\ua9f0-\ua9f9\uaa29-\uaa36\uaa43\uaa4c\uaa4d\uaa50-\uaa59\uaa7b-\uaa7d\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uaaeb-\uaaef\uaaf5\uaaf6\uabe3-\uabea\uabec\uabed\uabf0-\uabf9\ufb1e\ufe00-\ufe0f\ufe20-\ufe2d\ufe33\ufe34\ufe4d-\ufe4f\uff10-\uff19\uff3f"
|
||||
|
||||
const nonASCIIidentifierStart = new RegExp("[" + nonASCIIidentifierStartChars + "]")
|
||||
const nonASCIIidentifier = new RegExp("[" + nonASCIIidentifierStartChars + nonASCIIidentifierChars + "]")
|
||||
|
||||
nonASCIIidentifierStartChars = nonASCIIidentifierChars = null
|
||||
|
||||
// These are a run-length and offset encoded representation of the
|
||||
// >0xffff code points that are a valid part of identifiers. The
|
||||
// offset starts at 0x10000, and each pair of numbers represents an
|
||||
// offset to the next range, and then a size of the range. They were
|
||||
// generated by tools/generate-identifier-regex.js
|
||||
var astralIdentifierStartCodes = [0,11,2,25,2,18,2,1,2,14,3,13,35,122,70,52,268,28,4,48,48,31,17,26,6,37,11,29,3,35,5,7,2,4,43,157,99,39,9,51,157,310,10,21,11,7,153,5,3,0,2,43,2,1,4,0,3,22,11,22,10,30,98,21,11,25,71,55,7,1,65,0,16,3,2,2,2,26,45,28,4,28,36,7,2,27,28,53,11,21,11,18,14,17,111,72,955,52,76,44,33,24,27,35,42,34,4,0,13,47,15,3,22,0,38,17,2,24,133,46,39,7,3,1,3,21,2,6,2,1,2,4,4,0,32,4,287,47,21,1,2,0,185,46,82,47,21,0,60,42,502,63,32,0,449,56,1288,920,104,110,2962,1070,13266,568,8,30,114,29,19,47,17,3,32,20,6,18,881,68,12,0,67,12,16481,1,3071,106,6,12,4,8,8,9,5991,84,2,70,2,1,3,0,3,1,3,3,2,11,2,0,2,6,2,64,2,3,3,7,2,6,2,27,2,3,2,4,2,0,4,6,2,339,3,24,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,7,4149,196,1340,3,2,26,2,1,2,0,3,0,2,9,2,3,2,0,2,0,7,0,5,0,2,0,2,0,2,2,2,1,2,0,3,0,2,0,2,0,2,0,2,0,2,1,2,0,3,3,2,6,2,3,2,3,2,0,2,9,2,16,6,2,2,4,2,16,4421,42710,42,4148,12,221,16355,541]
|
||||
var astralIdentifierCodes = [509,0,227,0,150,4,294,9,1368,2,2,1,6,3,41,2,5,0,166,1,1306,2,54,14,32,9,16,3,46,10,54,9,7,2,37,13,2,9,52,0,13,2,49,13,16,9,83,11,168,11,6,9,8,2,57,0,2,6,3,1,3,2,10,0,11,1,3,6,4,4,316,19,13,9,214,6,3,8,112,16,16,9,82,12,9,9,535,9,20855,9,135,4,60,6,26,9,1016,45,17,3,19723,1,5319,4,4,5,9,7,3,6,31,3,149,2,1418,49,4305,6,792618,239]
|
||||
|
||||
// This has a complexity linear to the value of the code. The
|
||||
// assumption is that looking up astral identifier characters is
|
||||
// rare.
|
||||
function isInAstralSet(code, set) {
|
||||
let pos = 0x10000
|
||||
for (let i = 0; i < set.length; i += 2) {
|
||||
pos += set[i]
|
||||
if (pos > code) return false
|
||||
pos += set[i + 1]
|
||||
if (pos >= code) return true
|
||||
}
|
||||
}
|
||||
|
||||
// Test whether a given character code starts an identifier.
|
||||
|
||||
export function isIdentifierStart(code, astral) {
|
||||
if (code < 65) return code === 36
|
||||
if (code < 91) return true
|
||||
if (code < 97) return code === 95
|
||||
if (code < 123) return true
|
||||
if (code <= 0xffff) return code >= 0xaa && nonASCIIidentifierStart.test(String.fromCharCode(code))
|
||||
if (astral === false) return false
|
||||
return isInAstralSet(code, astralIdentifierStartCodes)
|
||||
}
|
||||
|
||||
// Test whether a given character is part of an identifier.
|
||||
|
||||
export function isIdentifierChar(code, astral) {
|
||||
if (code < 48) return code === 36
|
||||
if (code < 58) return true
|
||||
if (code < 65) return false
|
||||
if (code < 91) return true
|
||||
if (code < 97) return code === 95
|
||||
if (code < 123) return true
|
||||
if (code <= 0xffff) return code >= 0xaa && nonASCIIidentifier.test(String.fromCharCode(code))
|
||||
if (astral === false) return false
|
||||
return isInAstralSet(code, astralIdentifierStartCodes) || isInAstralSet(code, astralIdentifierCodes)
|
||||
}
|
||||
82
src/index.js
Executable file
82
src/index.js
Executable file
@ -0,0 +1,82 @@
|
||||
// Acorn is a tiny, fast JavaScript parser written in JavaScript.
|
||||
//
|
||||
// Acorn was written by Marijn Haverbeke, Ingvar Stepanyan, and
|
||||
// various contributors and released under an MIT license.
|
||||
//
|
||||
// Git repositories for Acorn are available at
|
||||
//
|
||||
// http://marijnhaverbeke.nl/git/acorn
|
||||
// https://github.com/marijnh/acorn.git
|
||||
//
|
||||
// Please use the [github bug tracker][ghbt] to report issues.
|
||||
//
|
||||
// [ghbt]: https://github.com/marijnh/acorn/issues
|
||||
//
|
||||
// This file defines the main parser interface. The library also comes
|
||||
// with a [error-tolerant parser][dammit] and an
|
||||
// [abstract syntax tree walker][walk], defined in other files.
|
||||
//
|
||||
// [dammit]: acorn_loose.js
|
||||
// [walk]: util/walk.js
|
||||
|
||||
import {Parser} from "./state"
|
||||
import {getOptions} from "./options"
|
||||
import "./parseutil"
|
||||
import "./statement"
|
||||
import "./lval"
|
||||
import "./expression"
|
||||
import "./lookahead"
|
||||
|
||||
export {Parser, plugins} from "./state"
|
||||
export {defaultOptions} from "./options"
|
||||
export {SourceLocation} from "./location"
|
||||
export {getLineInfo} from "./location"
|
||||
export {Node} from "./node"
|
||||
export {TokenType, types as tokTypes} from "./tokentype"
|
||||
export {TokContext, types as tokContexts} from "./tokencontext"
|
||||
export {isIdentifierChar, isIdentifierStart} from "./identifier"
|
||||
export {Token} from "./tokenize"
|
||||
export {isNewLine, lineBreak, lineBreakG} from "./whitespace"
|
||||
|
||||
import "../plugins/flow";
|
||||
import "../plugins/jsx";
|
||||
|
||||
export const version = "1.0.0"
|
||||
|
||||
// The main exported interface (under `self.acorn` when in the
|
||||
// browser) is a `parse` function that takes a code string and
|
||||
// returns an abstract syntax tree as specified by [Mozilla parser
|
||||
// API][api].
|
||||
//
|
||||
// [api]: https://developer.mozilla.org/en-US/docs/SpiderMonkey/Parser_API
|
||||
|
||||
export function parse(input, options) {
|
||||
let p = parser(options, input)
|
||||
let startPos = p.options.locations ? [p.pos, p.curPosition()] : p.pos
|
||||
p.nextToken()
|
||||
return p.parseTopLevel(p.options.program || p.startNodeAt(startPos))
|
||||
}
|
||||
|
||||
// This function tries to parse a single expression at a given
|
||||
// offset in a string. Useful for parsing mixed-language formats
|
||||
// that embed JavaScript expressions.
|
||||
|
||||
export function parseExpressionAt(input, pos, options) {
|
||||
let p = parser(options, input, pos)
|
||||
p.nextToken()
|
||||
return p.parseExpression()
|
||||
}
|
||||
|
||||
// Acorn is organized as a tokenizer and a recursive-descent parser.
|
||||
// The `tokenize` export provides an interface to the tokenizer.
|
||||
// Because the tokenizer is optimized for being efficiently used by
|
||||
// the Acorn parser itself, this interface is somewhat crude and not
|
||||
// very modular.
|
||||
|
||||
export function tokenizer(input, options) {
|
||||
return parser(options, input)
|
||||
}
|
||||
|
||||
function parser(options, input) {
|
||||
return new Parser(getOptions(options), String(input))
|
||||
}
|
||||
67
src/location.js
Executable file
67
src/location.js
Executable file
@ -0,0 +1,67 @@
|
||||
import {Parser} from "./state"
|
||||
import {lineBreakG} from "./whitespace"
|
||||
|
||||
// These are used when `options.locations` is on, for the
|
||||
// `startLoc` and `endLoc` properties.
|
||||
|
||||
export class Position {
|
||||
constructor(line, col) {
|
||||
this.line = line
|
||||
this.column = col
|
||||
}
|
||||
|
||||
offset(n) {
|
||||
return new Position(this.line, this.column + n)
|
||||
}
|
||||
}
|
||||
|
||||
export class SourceLocation {
|
||||
constructor(p, start, end) {
|
||||
this.start = start
|
||||
this.end = end
|
||||
if (p.sourceFile !== null) this.source = p.sourceFile
|
||||
}
|
||||
}
|
||||
|
||||
// The `getLineInfo` function is mostly useful when the
|
||||
// `locations` option is off (for performance reasons) and you
|
||||
// want to find the line/column position for a given character
|
||||
// offset. `input` should be the code string that the offset refers
|
||||
// into.
|
||||
|
||||
export function getLineInfo(input, offset) {
|
||||
for (let line = 1, cur = 0;;) {
|
||||
lineBreakG.lastIndex = cur
|
||||
let match = lineBreakG.exec(input)
|
||||
if (match && match.index < offset) {
|
||||
++line
|
||||
cur = match.index + match[0].length
|
||||
} else {
|
||||
return new Position(line, offset - cur)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
const pp = Parser.prototype
|
||||
|
||||
// This function is used to raise exceptions on parse errors. It
|
||||
// takes an offset integer (into the current `input`) to indicate
|
||||
// the location of the error, attaches the position to the end
|
||||
// of the error message, and then raises a `SyntaxError` with that
|
||||
// message.
|
||||
|
||||
pp.raise = function(pos, message) {
|
||||
let loc = getLineInfo(this.input, pos)
|
||||
message += " (" + loc.line + ":" + loc.column + ")"
|
||||
let err = new SyntaxError(message)
|
||||
err.pos = pos; err.loc = loc; err.raisedAt = this.pos
|
||||
throw err
|
||||
}
|
||||
|
||||
pp.curPosition = function() {
|
||||
return new Position(this.curLine, this.pos - this.lineStart)
|
||||
}
|
||||
|
||||
pp.markPosition = function() {
|
||||
return this.options.locations ? [this.start, this.startLoc] : this.start
|
||||
}
|
||||
35
src/lookahead.js
Normal file
35
src/lookahead.js
Normal file
@ -0,0 +1,35 @@
|
||||
import {Parser} from "./state"
|
||||
|
||||
const pp = Parser.prototype
|
||||
|
||||
var STATE_KEYS = [
|
||||
"lastTokStartLoc",
|
||||
"lastTokEndLoc",
|
||||
"lastTokStart",
|
||||
"lastTokEnd",
|
||||
"lineStart",
|
||||
"startLoc",
|
||||
"endLoc",
|
||||
"start",
|
||||
"pos",
|
||||
"end",
|
||||
"type",
|
||||
"value"
|
||||
];
|
||||
|
||||
pp.getState = function () {
|
||||
var state = {};
|
||||
for (var i = 0; i < STATE_KEYS.length; i++) {
|
||||
var key = STATE_KEYS[i];
|
||||
state[key] = this[key];
|
||||
}
|
||||
return state;
|
||||
};
|
||||
|
||||
pp.lookahead = function() {
|
||||
var old = this.getState();
|
||||
this.next();
|
||||
var curr = this.getState();
|
||||
for (var key in old) this[key] = old[key];
|
||||
return curr;
|
||||
};
|
||||
197
src/lval.js
Executable file
197
src/lval.js
Executable file
@ -0,0 +1,197 @@
|
||||
import {types as tt} from "./tokentype"
|
||||
import {Parser} from "./state"
|
||||
import {reservedWords} from "./identifier"
|
||||
import {has} from "./util"
|
||||
|
||||
const pp = Parser.prototype
|
||||
|
||||
// Convert existing expression atom to assignable pattern
|
||||
// if possible.
|
||||
|
||||
pp.toAssignable = function(node, isBinding) {
|
||||
if (this.options.ecmaVersion >= 6 && node) {
|
||||
switch (node.type) {
|
||||
case "Identifier":
|
||||
case "ObjectPattern":
|
||||
case "ArrayPattern":
|
||||
case "AssignmentPattern":
|
||||
break
|
||||
|
||||
case "ObjectExpression":
|
||||
node.type = "ObjectPattern"
|
||||
for (let i = 0; i < node.properties.length; i++) {
|
||||
let prop = node.properties[i]
|
||||
if (prop.kind !== "init") this.raise(prop.key.start, "Object pattern can't contain getter or setter")
|
||||
this.toAssignable(prop.value, isBinding)
|
||||
}
|
||||
break
|
||||
|
||||
case "ArrayExpression":
|
||||
node.type = "ArrayPattern"
|
||||
this.toAssignableList(node.elements, isBinding)
|
||||
break
|
||||
|
||||
case "AssignmentExpression":
|
||||
if (node.operator === "=") {
|
||||
node.type = "AssignmentPattern"
|
||||
} else {
|
||||
this.raise(node.left.end, "Only '=' operator can be used for specifying default value.")
|
||||
}
|
||||
break
|
||||
|
||||
case "MemberExpression":
|
||||
if (!isBinding) break
|
||||
|
||||
default:
|
||||
this.raise(node.start, "Assigning to rvalue")
|
||||
}
|
||||
}
|
||||
return node
|
||||
}
|
||||
|
||||
// Convert list of expression atoms to binding list.
|
||||
|
||||
pp.toAssignableList = function(exprList, isBinding) {
|
||||
let end = exprList.length
|
||||
if (end) {
|
||||
let last = exprList[end - 1]
|
||||
if (last && last.type == "RestElement") {
|
||||
--end
|
||||
} else if (last && last.type == "SpreadElement") {
|
||||
last.type = "RestElement"
|
||||
let arg = last.argument
|
||||
this.toAssignable(arg, isBinding)
|
||||
if (arg.type !== "Identifier" && arg.type !== "MemberExpression" && arg.type !== "ArrayPattern")
|
||||
this.unexpected(arg.start)
|
||||
--end
|
||||
}
|
||||
}
|
||||
for (let i = 0; i < end; i++) {
|
||||
let elt = exprList[i]
|
||||
if (elt) this.toAssignable(elt, isBinding)
|
||||
}
|
||||
return exprList
|
||||
}
|
||||
|
||||
// Parses spread element.
|
||||
|
||||
pp.parseSpread = function(refShorthandDefaultPos) {
|
||||
let node = this.startNode()
|
||||
this.next()
|
||||
node.argument = this.parseMaybeAssign(refShorthandDefaultPos)
|
||||
return this.finishNode(node, "SpreadElement")
|
||||
}
|
||||
|
||||
pp.parseRest = function() {
|
||||
let node = this.startNode()
|
||||
this.next()
|
||||
node.argument = this.type === tt.name || this.type === tt.bracketL ? this.parseBindingAtom() : this.unexpected()
|
||||
return this.finishNode(node, "RestElement")
|
||||
}
|
||||
|
||||
// Parses lvalue (assignable) atom.
|
||||
|
||||
pp.parseBindingAtom = function() {
|
||||
if (this.options.ecmaVersion < 6) return this.parseIdent()
|
||||
switch (this.type) {
|
||||
case tt.name:
|
||||
return this.parseIdent()
|
||||
|
||||
case tt.bracketL:
|
||||
let node = this.startNode()
|
||||
this.next()
|
||||
node.elements = this.parseBindingList(tt.bracketR, true, true)
|
||||
return this.finishNode(node, "ArrayPattern")
|
||||
|
||||
case tt.braceL:
|
||||
return this.parseObj(true)
|
||||
|
||||
default:
|
||||
this.unexpected()
|
||||
}
|
||||
}
|
||||
|
||||
pp.parseBindingList = function(close, allowEmpty, allowTrailingComma) {
|
||||
var elts = [], first = true
|
||||
while (!this.eat(close)) {
|
||||
if (first) first = false
|
||||
else this.expect(tt.comma)
|
||||
if (allowEmpty && this.type === tt.comma) {
|
||||
elts.push(null)
|
||||
} else if (allowTrailingComma && this.afterTrailingComma(close)) {
|
||||
break
|
||||
} else if (this.type === tt.ellipsis) {
|
||||
elts.push(this.parseAssignableListItemTypes(this.parseRest()))
|
||||
this.expect(close)
|
||||
break
|
||||
} else {
|
||||
elts.push(this.parseAssignableListItemTypes(this.parseMaybeDefault()))
|
||||
}
|
||||
}
|
||||
return elts
|
||||
}
|
||||
|
||||
pp.parseAssignableListItemTypes = function(param) {
|
||||
return param
|
||||
}
|
||||
|
||||
// Parses assignment pattern around given atom if possible.
|
||||
|
||||
pp.parseMaybeDefault = function(startPos, left) {
|
||||
startPos = startPos || this.markPosition()
|
||||
left = left || this.parseBindingAtom()
|
||||
if (!this.eat(tt.eq)) return left
|
||||
let node = this.startNodeAt(startPos)
|
||||
node.operator = "="
|
||||
node.left = left
|
||||
node.right = this.parseMaybeAssign()
|
||||
return this.finishNode(node, "AssignmentPattern")
|
||||
}
|
||||
|
||||
// Verify that a node is an lval — something that can be assigned
|
||||
// to.
|
||||
|
||||
pp.checkLVal = function(expr, isBinding, checkClashes) {
|
||||
switch (expr.type) {
|
||||
case "Identifier":
|
||||
if (this.strict && (reservedWords.strictBind(expr.name) || reservedWords.strict(expr.name)))
|
||||
this.raise(expr.start, (isBinding ? "Binding " : "Assigning to ") + expr.name + " in strict mode")
|
||||
if (checkClashes) {
|
||||
if (has(checkClashes, expr.name))
|
||||
this.raise(expr.start, "Argument name clash in strict mode")
|
||||
checkClashes[expr.name] = true
|
||||
}
|
||||
break
|
||||
|
||||
case "MemberExpression":
|
||||
if (isBinding) this.raise(expr.start, (isBinding ? "Binding" : "Assigning to") + " member expression")
|
||||
break
|
||||
|
||||
case "ObjectPattern":
|
||||
for (let i = 0; i < expr.properties.length; i++) {
|
||||
var prop = expr.properties[i];
|
||||
if (prop.type === "Property") prop = prop.value;
|
||||
this.checkLVal(prop, isBinding, checkClashes)
|
||||
}
|
||||
break
|
||||
|
||||
case "ArrayPattern":
|
||||
for (let i = 0; i < expr.elements.length; i++) {
|
||||
let elem = expr.elements[i]
|
||||
if (elem) this.checkLVal(elem, isBinding, checkClashes)
|
||||
}
|
||||
break
|
||||
|
||||
case "AssignmentPattern":
|
||||
this.checkLVal(expr.left, isBinding, checkClashes)
|
||||
break
|
||||
|
||||
case "SpreadProperty":
|
||||
case "RestElement":
|
||||
this.checkLVal(expr.argument, isBinding, checkClashes)
|
||||
break
|
||||
|
||||
default:
|
||||
this.raise(expr.start, (isBinding ? "Binding" : "Assigning to") + " rvalue")
|
||||
}
|
||||
}
|
||||
57
src/node.js
Executable file
57
src/node.js
Executable file
@ -0,0 +1,57 @@
|
||||
import {Parser} from "./state"
|
||||
import {SourceLocation} from "./location"
|
||||
|
||||
// Start an AST node, attaching a start offset.
|
||||
|
||||
const pp = Parser.prototype
|
||||
|
||||
export class Node {}
|
||||
|
||||
pp.startNode = function() {
|
||||
let node = new Node
|
||||
node.start = this.start
|
||||
if (this.options.locations)
|
||||
node.loc = new SourceLocation(this, this.startLoc)
|
||||
if (this.options.directSourceFile)
|
||||
node.sourceFile = this.options.directSourceFile
|
||||
if (this.options.ranges)
|
||||
node.range = [this.start, 0]
|
||||
return node
|
||||
}
|
||||
|
||||
pp.startNodeAt = function(pos) {
|
||||
let node = new Node, start = pos
|
||||
if (this.options.locations) {
|
||||
node.loc = new SourceLocation(this, start[1])
|
||||
start = pos[0]
|
||||
}
|
||||
node.start = start
|
||||
if (this.options.directSourceFile)
|
||||
node.sourceFile = this.options.directSourceFile
|
||||
if (this.options.ranges)
|
||||
node.range = [start, 0]
|
||||
return node
|
||||
}
|
||||
|
||||
// Finish an AST node, adding `type` and `end` properties.
|
||||
|
||||
pp.finishNode = function(node, type) {
|
||||
node.type = type
|
||||
node.end = this.lastTokEnd
|
||||
if (this.options.locations)
|
||||
node.loc.end = this.lastTokEndLoc
|
||||
if (this.options.ranges)
|
||||
node.range[1] = this.lastTokEnd
|
||||
return node
|
||||
}
|
||||
|
||||
// Finish node at given position
|
||||
|
||||
pp.finishNodeAt = function(node, type, pos) {
|
||||
if (this.options.locations) { node.loc.end = pos[1]; pos = pos[0] }
|
||||
node.type = type
|
||||
node.end = pos
|
||||
if (this.options.ranges)
|
||||
node.range[1] = pos
|
||||
return node
|
||||
}
|
||||
122
src/options.js
Executable file
122
src/options.js
Executable file
@ -0,0 +1,122 @@
|
||||
import {has, isArray} from "./util"
|
||||
import {SourceLocation} from "./location"
|
||||
|
||||
// A second optional argument can be given to further configure
|
||||
// the parser process. These options are recognized:
|
||||
|
||||
export const defaultOptions = {
|
||||
// `ecmaVersion` indicates the ECMAScript version to parse. Must
|
||||
// be either 3, or 5, or 6. This influences support for strict
|
||||
// mode, the set of reserved words, support for getters and
|
||||
// setters and other features.
|
||||
ecmaVersion: 5,
|
||||
// Source type ("script" or "module") for different semantics
|
||||
sourceType: "script",
|
||||
// `onInsertedSemicolon` can be a callback that will be called
|
||||
// when a semicolon is automatically inserted. It will be passed
|
||||
// th position of the comma as an offset, and if `locations` is
|
||||
// enabled, it is given the location as a `{line, column}` object
|
||||
// as second argument.
|
||||
onInsertedSemicolon: null,
|
||||
// `onTrailingComma` is similar to `onInsertedSemicolon`, but for
|
||||
// trailing commas.
|
||||
onTrailingComma: null,
|
||||
// By default, reserved words are not enforced. Disable
|
||||
// `allowReserved` to enforce them. When this option has the
|
||||
// value "never", reserved words and keywords can also not be
|
||||
// used as property names.
|
||||
allowReserved: true,
|
||||
// When enabled, a return at the top level is not considered an
|
||||
// error.
|
||||
allowReturnOutsideFunction: false,
|
||||
// When enabled, import/export statements are not constrained to
|
||||
// appearing at the top of the program.
|
||||
allowImportExportEverywhere: false,
|
||||
// When enabled, hashbang directive in the beginning of file
|
||||
// is allowed and treated as a line comment.
|
||||
allowHashBang: false,
|
||||
// When `locations` is on, `loc` properties holding objects with
|
||||
// `start` and `end` properties in `{line, column}` form (with
|
||||
// line being 1-based and column 0-based) will be attached to the
|
||||
// nodes.
|
||||
locations: false,
|
||||
// A function can be passed as `onToken` option, which will
|
||||
// cause Acorn to call that function with object in the same
|
||||
// format as tokenize() returns. Note that you are not
|
||||
// allowed to call the parser from the callback—that will
|
||||
// corrupt its internal state.
|
||||
onToken: null,
|
||||
// A function can be passed as `onComment` option, which will
|
||||
// cause Acorn to call that function with `(block, text, start,
|
||||
// end)` parameters whenever a comment is skipped. `block` is a
|
||||
// boolean indicating whether this is a block (`/* */`) comment,
|
||||
// `text` is the content of the comment, and `start` and `end` are
|
||||
// character offsets that denote the start and end of the comment.
|
||||
// When the `locations` option is on, two more parameters are
|
||||
// passed, the full `{line, column}` locations of the start and
|
||||
// end of the comments. Note that you are not allowed to call the
|
||||
// parser from the callback—that will corrupt its internal state.
|
||||
onComment: null,
|
||||
// Nodes have their start and end characters offsets recorded in
|
||||
// `start` and `end` properties (directly on the node, rather than
|
||||
// the `loc` object, which holds line/column data. To also add a
|
||||
// [semi-standardized][range] `range` property holding a `[start,
|
||||
// end]` array with the same numbers, set the `ranges` option to
|
||||
// `true`.
|
||||
//
|
||||
// [range]: https://bugzilla.mozilla.org/show_bug.cgi?id=745678
|
||||
ranges: false,
|
||||
// It is possible to parse multiple files into a single AST by
|
||||
// passing the tree produced by parsing the first file as
|
||||
// `program` option in subsequent parses. This will add the
|
||||
// toplevel forms of the parsed file to the `Program` (top) node
|
||||
// of an existing parse tree.
|
||||
program: null,
|
||||
// When `locations` is on, you can pass this to record the source
|
||||
// file in every node's `loc` object.
|
||||
sourceFile: null,
|
||||
// This value, if given, is stored in every node, whether
|
||||
// `locations` is on or off.
|
||||
directSourceFile: null,
|
||||
// When enabled, parenthesized expressions are represented by
|
||||
// (non-standard) ParenthesizedExpression nodes
|
||||
preserveParens: false,
|
||||
plugins: {},
|
||||
// Babel-specific options
|
||||
features: {},
|
||||
strictMode: null
|
||||
}
|
||||
|
||||
// Interpret and default an options object
|
||||
|
||||
export function getOptions(opts) {
|
||||
let options = {}
|
||||
for (let opt in defaultOptions)
|
||||
options[opt] = opts && has(opts, opt) ? opts[opt] : defaultOptions[opt]
|
||||
|
||||
if (isArray(options.onToken)) {
|
||||
let tokens = options.onToken
|
||||
options.onToken = (token) => tokens.push(token)
|
||||
}
|
||||
if (isArray(options.onComment))
|
||||
options.onComment = pushComment(options, options.onComment)
|
||||
|
||||
return options
|
||||
}
|
||||
|
||||
function pushComment(options, array) {
|
||||
return function (block, text, start, end, startLoc, endLoc) {
|
||||
let comment = {
|
||||
type: block ? 'Block' : 'Line',
|
||||
value: text,
|
||||
start: start,
|
||||
end: end
|
||||
}
|
||||
if (options.locations)
|
||||
comment.loc = new SourceLocation(this, startLoc, endLoc)
|
||||
if (options.ranges)
|
||||
comment.range = [start, end]
|
||||
array.push(comment)
|
||||
}
|
||||
}
|
||||
|
||||
89
src/parseutil.js
Executable file
89
src/parseutil.js
Executable file
@ -0,0 +1,89 @@
|
||||
import {types as tt} from "./tokentype"
|
||||
import {Parser} from "./state"
|
||||
import {lineBreak} from "./whitespace"
|
||||
|
||||
const pp = Parser.prototype
|
||||
|
||||
// ## Parser utilities
|
||||
|
||||
// Test whether a statement node is the string literal `"use strict"`.
|
||||
|
||||
pp.isUseStrict = function(stmt) {
|
||||
return this.options.ecmaVersion >= 5 && stmt.type === "ExpressionStatement" &&
|
||||
stmt.expression.type === "Literal" && stmt.expression.value === "use strict"
|
||||
}
|
||||
|
||||
// Predicate that tests whether the next token is of the given
|
||||
// type, and if yes, consumes it as a side effect.
|
||||
|
||||
pp.eat = function(type) {
|
||||
if (this.type === type) {
|
||||
this.next()
|
||||
return true
|
||||
} else {
|
||||
return false
|
||||
}
|
||||
}
|
||||
|
||||
// Tests whether parsed token is a contextual keyword.
|
||||
|
||||
pp.isContextual = function(name) {
|
||||
return this.type === tt.name && this.value === name
|
||||
}
|
||||
|
||||
// Consumes contextual keyword if possible.
|
||||
|
||||
pp.eatContextual = function(name) {
|
||||
return this.value === name && this.eat(tt.name)
|
||||
}
|
||||
|
||||
// Asserts that following token is given contextual keyword.
|
||||
|
||||
pp.expectContextual = function(name) {
|
||||
if (!this.eatContextual(name)) this.unexpected()
|
||||
}
|
||||
|
||||
// Test whether a semicolon can be inserted at the current position.
|
||||
|
||||
pp.canInsertSemicolon = function() {
|
||||
return this.type === tt.eof ||
|
||||
this.type === tt.braceR ||
|
||||
lineBreak.test(this.input.slice(this.lastTokEnd, this.start))
|
||||
}
|
||||
|
||||
pp.insertSemicolon = function() {
|
||||
if (this.canInsertSemicolon()) {
|
||||
if (this.options.onInsertedSemicolon)
|
||||
this.options.onInsertedSemicolon(this.lastTokEnd, this.lastTokEndLoc)
|
||||
return true
|
||||
}
|
||||
}
|
||||
|
||||
// Consume a semicolon, or, failing that, see if we are allowed to
|
||||
// pretend that there is a semicolon at this position.
|
||||
|
||||
pp.semicolon = function() {
|
||||
if (!this.eat(tt.semi) && !this.insertSemicolon()) this.unexpected()
|
||||
}
|
||||
|
||||
pp.afterTrailingComma = function(tokType) {
|
||||
if (this.type == tokType) {
|
||||
if (this.options.onTrailingComma)
|
||||
this.options.onTrailingComma(this.lastTokStart, this.lastTokStartLoc)
|
||||
this.next()
|
||||
return true
|
||||
}
|
||||
}
|
||||
|
||||
// Expect a token of a given type. If found, consume it, otherwise,
|
||||
// raise an unexpected token error.
|
||||
|
||||
pp.expect = function(type) {
|
||||
this.eat(type) || this.unexpected()
|
||||
}
|
||||
|
||||
// Raise an unexpected token error.
|
||||
|
||||
pp.unexpected = function(pos) {
|
||||
this.raise(pos != null ? pos : this.start, "Unexpected token")
|
||||
}
|
||||
73
src/state.js
Executable file
73
src/state.js
Executable file
@ -0,0 +1,73 @@
|
||||
import {reservedWords, keywords} from "./identifier"
|
||||
import {types as tt, lineBreak} from "./tokentype"
|
||||
|
||||
export function Parser(options, input, startPos) {
|
||||
this.options = options
|
||||
this.loadPlugins(this.options.plugins)
|
||||
this.sourceFile = this.options.sourceFile || null
|
||||
this.isKeyword = keywords[this.options.ecmaVersion >= 6 ? 6 : 5]
|
||||
this.isReservedWord = reservedWords[this.options.ecmaVersion]
|
||||
this.input = input
|
||||
|
||||
// Set up token state
|
||||
|
||||
// The current position of the tokenizer in the input.
|
||||
if (startPos) {
|
||||
this.pos = startPos
|
||||
this.lineStart = Math.max(0, this.input.lastIndexOf("\n", startPos))
|
||||
this.curLine = this.input.slice(0, this.lineStart).split(lineBreak).length
|
||||
} else {
|
||||
this.pos = this.lineStart = 0
|
||||
this.curLine = 1
|
||||
}
|
||||
|
||||
// Properties of the current token:
|
||||
// Its type
|
||||
this.type = tt.eof
|
||||
// For tokens that include more information than their type, the value
|
||||
this.value = null
|
||||
// Its start and end offset
|
||||
this.start = this.end = this.pos
|
||||
// And, if locations are used, the {line, column} object
|
||||
// corresponding to those offsets
|
||||
this.startLoc = this.endLoc = null
|
||||
|
||||
// Position information for the previous token
|
||||
this.lastTokEndLoc = this.lastTokStartLoc = null
|
||||
this.lastTokStart = this.lastTokEnd = this.pos
|
||||
|
||||
// The context stack is used to superficially track syntactic
|
||||
// context to predict whether a regular expression is allowed in a
|
||||
// given position.
|
||||
this.context = this.initialContext()
|
||||
this.exprAllowed = true
|
||||
|
||||
// Figure out if it's a module code.
|
||||
this.inModule = this.options.sourceType === "module"
|
||||
this.strict = this.options.strictMode === false ? false : this.inModule
|
||||
|
||||
// Flags to track whether we are in a function, a generator.
|
||||
this.inFunction = this.inGenerator = false
|
||||
// Labels in scope.
|
||||
this.labels = []
|
||||
|
||||
// If enabled, skip leading hashbang line.
|
||||
if (this.pos === 0 && this.options.allowHashBang && this.input.slice(0, 2) === '#!')
|
||||
this.skipLineComment(2)
|
||||
}
|
||||
|
||||
Parser.prototype.extend = function(name, f) {
|
||||
this[name] = f(this[name])
|
||||
}
|
||||
|
||||
// Registered plugins
|
||||
|
||||
export const plugins = {}
|
||||
|
||||
Parser.prototype.loadPlugins = function(plugins) {
|
||||
for (let name in plugins) {
|
||||
let plugin = exports.plugins[name]
|
||||
if (!plugin) throw new Error("Plugin '" + name + "' not found")
|
||||
plugin(this, plugins[name])
|
||||
}
|
||||
}
|
||||
653
src/statement.js
Executable file
653
src/statement.js
Executable file
@ -0,0 +1,653 @@
|
||||
import {types as tt} from "./tokentype"
|
||||
import {Parser} from "./state"
|
||||
import {lineBreak} from "./whitespace"
|
||||
|
||||
const pp = Parser.prototype
|
||||
|
||||
// ### Statement parsing
|
||||
|
||||
// Parse a program. Initializes the parser, reads any number of
|
||||
// statements, and wraps them in a Program node. Optionally takes a
|
||||
// `program` argument. If present, the statements will be appended
|
||||
// to its body instead of creating a new node.
|
||||
|
||||
pp.parseTopLevel = function(node) {
|
||||
let first = true
|
||||
if (!node.body) node.body = []
|
||||
while (this.type !== tt.eof) {
|
||||
let stmt = this.parseStatement(true, true)
|
||||
node.body.push(stmt)
|
||||
if (first && this.isUseStrict(stmt)) this.setStrict(true)
|
||||
first = false
|
||||
}
|
||||
this.next()
|
||||
if (this.options.ecmaVersion >= 6) {
|
||||
node.sourceType = this.options.sourceType
|
||||
}
|
||||
return this.finishNode(node, "Program")
|
||||
}
|
||||
|
||||
const loopLabel = {kind: "loop"}, switchLabel = {kind: "switch"}
|
||||
|
||||
// Parse a single statement.
|
||||
//
|
||||
// If expecting a statement and finding a slash operator, parse a
|
||||
// regular expression literal. This is to handle cases like
|
||||
// `if (foo) /blah/.exec(foo)`, where looking at the previous token
|
||||
// does not help.
|
||||
|
||||
pp.parseStatement = function(declaration, topLevel) {
|
||||
let starttype = this.type, node = this.startNode()
|
||||
|
||||
// Most types of statements are recognized by the keyword they
|
||||
// start with. Many are trivial to parse, some require a bit of
|
||||
// complexity.
|
||||
|
||||
switch (starttype) {
|
||||
case tt._break: case tt._continue: return this.parseBreakContinueStatement(node, starttype.keyword)
|
||||
case tt._debugger: return this.parseDebuggerStatement(node)
|
||||
case tt._do: return this.parseDoStatement(node)
|
||||
case tt._for: return this.parseForStatement(node)
|
||||
case tt._function:
|
||||
if (!declaration && this.options.ecmaVersion >= 6) this.unexpected()
|
||||
return this.parseFunctionStatement(node)
|
||||
case tt._class:
|
||||
if (!declaration) this.unexpected()
|
||||
return this.parseClass(node, true)
|
||||
case tt._if: return this.parseIfStatement(node)
|
||||
case tt._return: return this.parseReturnStatement(node)
|
||||
case tt._switch: return this.parseSwitchStatement(node)
|
||||
case tt._throw: return this.parseThrowStatement(node)
|
||||
case tt._try: return this.parseTryStatement(node)
|
||||
case tt._let: case tt._const: if (!declaration) this.unexpected() // NOTE: falls through to _var
|
||||
case tt._var: return this.parseVarStatement(node, starttype)
|
||||
case tt._while: return this.parseWhileStatement(node)
|
||||
case tt._with: return this.parseWithStatement(node)
|
||||
case tt.braceL: return this.parseBlock()
|
||||
case tt.semi: return this.parseEmptyStatement(node)
|
||||
case tt._export:
|
||||
case tt._import:
|
||||
if (!this.options.allowImportExportEverywhere) {
|
||||
if (!topLevel)
|
||||
this.raise(this.start, "'import' and 'export' may only appear at the top level")
|
||||
if (!this.inModule)
|
||||
this.raise(this.start, "'import' and 'export' may appear only with 'sourceType: module'")
|
||||
}
|
||||
return starttype === tt._import ? this.parseImport(node) : this.parseExport(node)
|
||||
|
||||
case tt.name:
|
||||
if (this.options.features["es7.asyncFunctions"] && this.value === "async") {
|
||||
// check to see if `function ` appears after this token, this is
|
||||
// pretty hacky
|
||||
if (this.lookahead().type === tt._function) {
|
||||
this.next();
|
||||
this.expect(tt._function);
|
||||
return this.parseFunction(node, true, false, true);
|
||||
}
|
||||
}
|
||||
|
||||
// If the statement does not start with a statement keyword or a
|
||||
// brace, it's an ExpressionStatement or LabeledStatement. We
|
||||
// simply start parsing an expression, and afterwards, if the
|
||||
// next token is a colon and the expression was a simple
|
||||
// Identifier node, we switch to interpreting it as a label.
|
||||
default:
|
||||
let maybeName = this.value, expr = this.parseExpression()
|
||||
if (starttype === tt.name && expr.type === "Identifier" && this.eat(tt.colon))
|
||||
return this.parseLabeledStatement(node, maybeName, expr)
|
||||
else return this.parseExpressionStatement(node, expr)
|
||||
}
|
||||
}
|
||||
|
||||
pp.parseBreakContinueStatement = function(node, keyword) {
|
||||
let isBreak = keyword == "break"
|
||||
this.next()
|
||||
if (this.eat(tt.semi) || this.insertSemicolon()) node.label = null
|
||||
else if (this.type !== tt.name) this.unexpected()
|
||||
else {
|
||||
node.label = this.parseIdent()
|
||||
this.semicolon()
|
||||
}
|
||||
|
||||
// Verify that there is an actual destination to break or
|
||||
// continue to.
|
||||
for (var i = 0; i < this.labels.length; ++i) {
|
||||
let lab = this.labels[i]
|
||||
if (node.label == null || lab.name === node.label.name) {
|
||||
if (lab.kind != null && (isBreak || lab.kind === "loop")) break
|
||||
if (node.label && isBreak) break
|
||||
}
|
||||
}
|
||||
if (i === this.labels.length) this.raise(node.start, "Unsyntactic " + keyword)
|
||||
return this.finishNode(node, isBreak ? "BreakStatement" : "ContinueStatement")
|
||||
}
|
||||
|
||||
pp.parseDebuggerStatement = function(node) {
|
||||
this.next()
|
||||
this.semicolon()
|
||||
return this.finishNode(node, "DebuggerStatement")
|
||||
}
|
||||
|
||||
pp.parseDoStatement = function(node) {
|
||||
this.next()
|
||||
this.labels.push(loopLabel)
|
||||
node.body = this.parseStatement(false)
|
||||
this.labels.pop()
|
||||
this.expect(tt._while)
|
||||
node.test = this.parseParenExpression()
|
||||
if (this.options.ecmaVersion >= 6)
|
||||
this.eat(tt.semi)
|
||||
else
|
||||
this.semicolon()
|
||||
return this.finishNode(node, "DoWhileStatement")
|
||||
}
|
||||
|
||||
// Disambiguating between a `for` and a `for`/`in` or `for`/`of`
|
||||
// loop is non-trivial. Basically, we have to parse the init `var`
|
||||
// statement or expression, disallowing the `in` operator (see
|
||||
// the second parameter to `parseExpression`), and then check
|
||||
// whether the next token is `in` or `of`. When there is no init
|
||||
// part (semicolon immediately after the opening parenthesis), it
|
||||
// is a regular `for` loop.
|
||||
|
||||
pp.parseForStatement = function(node) {
|
||||
this.next()
|
||||
this.labels.push(loopLabel)
|
||||
this.expect(tt.parenL)
|
||||
if (this.type === tt.semi) return this.parseFor(node, null)
|
||||
if (this.type === tt._var || this.type === tt._let || this.type === tt._const) {
|
||||
let init = this.startNode(), varKind = this.type
|
||||
this.next()
|
||||
this.parseVar(init, true, varKind)
|
||||
this.finishNode(init, "VariableDeclaration")
|
||||
if ((this.type === tt._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) && init.declarations.length === 1 &&
|
||||
!(varKind !== tt._var && init.declarations[0].init))
|
||||
return this.parseForIn(node, init)
|
||||
return this.parseFor(node, init)
|
||||
}
|
||||
let refShorthandDefaultPos = {start: 0}
|
||||
let init = this.parseExpression(true, refShorthandDefaultPos)
|
||||
if (this.type === tt._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) {
|
||||
this.toAssignable(init)
|
||||
this.checkLVal(init)
|
||||
return this.parseForIn(node, init)
|
||||
} else if (refShorthandDefaultPos.start) {
|
||||
this.unexpected(refShorthandDefaultPos.start)
|
||||
}
|
||||
return this.parseFor(node, init)
|
||||
}
|
||||
|
||||
pp.parseFunctionStatement = function(node) {
|
||||
this.next()
|
||||
return this.parseFunction(node, true)
|
||||
}
|
||||
|
||||
pp.parseIfStatement = function(node) {
|
||||
this.next()
|
||||
node.test = this.parseParenExpression()
|
||||
node.consequent = this.parseStatement(false)
|
||||
node.alternate = this.eat(tt._else) ? this.parseStatement(false) : null
|
||||
return this.finishNode(node, "IfStatement")
|
||||
}
|
||||
|
||||
pp.parseReturnStatement = function(node) {
|
||||
if (!this.inFunction && !this.options.allowReturnOutsideFunction)
|
||||
this.raise(this.start, "'return' outside of function")
|
||||
this.next()
|
||||
|
||||
// In `return` (and `break`/`continue`), the keywords with
|
||||
// optional arguments, we eagerly look for a semicolon or the
|
||||
// possibility to insert one.
|
||||
|
||||
if (this.eat(tt.semi) || this.insertSemicolon()) node.argument = null
|
||||
else { node.argument = this.parseExpression(); this.semicolon() }
|
||||
return this.finishNode(node, "ReturnStatement")
|
||||
}
|
||||
|
||||
pp.parseSwitchStatement = function(node) {
|
||||
this.next()
|
||||
node.discriminant = this.parseParenExpression()
|
||||
node.cases = []
|
||||
this.expect(tt.braceL)
|
||||
this.labels.push(switchLabel)
|
||||
|
||||
// Statements under must be grouped (by label) in SwitchCase
|
||||
// nodes. `cur` is used to keep the node that we are currently
|
||||
// adding statements to.
|
||||
|
||||
for (var cur, sawDefault; this.type != tt.braceR;) {
|
||||
if (this.type === tt._case || this.type === tt._default) {
|
||||
let isCase = this.type === tt._case
|
||||
if (cur) this.finishNode(cur, "SwitchCase")
|
||||
node.cases.push(cur = this.startNode())
|
||||
cur.consequent = []
|
||||
this.next()
|
||||
if (isCase) {
|
||||
cur.test = this.parseExpression()
|
||||
} else {
|
||||
if (sawDefault) this.raise(this.lastTokStart, "Multiple default clauses")
|
||||
sawDefault = true
|
||||
cur.test = null
|
||||
}
|
||||
this.expect(tt.colon)
|
||||
} else {
|
||||
if (!cur) this.unexpected()
|
||||
cur.consequent.push(this.parseStatement(true))
|
||||
}
|
||||
}
|
||||
if (cur) this.finishNode(cur, "SwitchCase")
|
||||
this.next() // Closing brace
|
||||
this.labels.pop()
|
||||
return this.finishNode(node, "SwitchStatement")
|
||||
}
|
||||
|
||||
pp.parseThrowStatement = function(node) {
|
||||
this.next()
|
||||
if (lineBreak.test(this.input.slice(this.lastTokEnd, this.start)))
|
||||
this.raise(this.lastTokEnd, "Illegal newline after throw")
|
||||
node.argument = this.parseExpression()
|
||||
this.semicolon()
|
||||
return this.finishNode(node, "ThrowStatement")
|
||||
}
|
||||
|
||||
// Reused empty array added for node fields that are always empty.
|
||||
|
||||
const empty = []
|
||||
|
||||
pp.parseTryStatement = function(node) {
|
||||
this.next()
|
||||
node.block = this.parseBlock()
|
||||
node.handler = null
|
||||
if (this.type === tt._catch) {
|
||||
let clause = this.startNode()
|
||||
this.next()
|
||||
this.expect(tt.parenL)
|
||||
clause.param = this.parseBindingAtom()
|
||||
this.checkLVal(clause.param, true)
|
||||
this.expect(tt.parenR)
|
||||
clause.guard = null
|
||||
clause.body = this.parseBlock()
|
||||
node.handler = this.finishNode(clause, "CatchClause")
|
||||
}
|
||||
node.guardedHandlers = empty
|
||||
node.finalizer = this.eat(tt._finally) ? this.parseBlock() : null
|
||||
if (!node.handler && !node.finalizer)
|
||||
this.raise(node.start, "Missing catch or finally clause")
|
||||
return this.finishNode(node, "TryStatement")
|
||||
}
|
||||
|
||||
pp.parseVarStatement = function(node, kind) {
|
||||
this.next()
|
||||
this.parseVar(node, false, kind)
|
||||
this.semicolon()
|
||||
return this.finishNode(node, "VariableDeclaration")
|
||||
}
|
||||
|
||||
pp.parseWhileStatement = function(node) {
|
||||
this.next()
|
||||
node.test = this.parseParenExpression()
|
||||
this.labels.push(loopLabel)
|
||||
node.body = this.parseStatement(false)
|
||||
this.labels.pop()
|
||||
return this.finishNode(node, "WhileStatement")
|
||||
}
|
||||
|
||||
pp.parseWithStatement = function(node) {
|
||||
if (this.strict) this.raise(this.start, "'with' in strict mode")
|
||||
this.next()
|
||||
node.object = this.parseParenExpression()
|
||||
node.body = this.parseStatement(false)
|
||||
return this.finishNode(node, "WithStatement")
|
||||
}
|
||||
|
||||
pp.parseEmptyStatement = function(node) {
|
||||
this.next()
|
||||
return this.finishNode(node, "EmptyStatement")
|
||||
}
|
||||
|
||||
pp.parseLabeledStatement = function(node, maybeName, expr) {
|
||||
for (let i = 0; i < this.labels.length; ++i)
|
||||
if (this.labels[i].name === maybeName) this.raise(expr.start, "Label '" + maybeName + "' is already declared")
|
||||
let kind = this.type.isLoop ? "loop" : this.type === tt._switch ? "switch" : null
|
||||
this.labels.push({name: maybeName, kind: kind})
|
||||
node.body = this.parseStatement(true)
|
||||
this.labels.pop()
|
||||
node.label = expr
|
||||
return this.finishNode(node, "LabeledStatement")
|
||||
}
|
||||
|
||||
pp.parseExpressionStatement = function(node, expr) {
|
||||
node.expression = expr
|
||||
this.semicolon()
|
||||
return this.finishNode(node, "ExpressionStatement")
|
||||
}
|
||||
|
||||
// Parse a semicolon-enclosed block of statements, handling `"use
|
||||
// strict"` declarations when `allowStrict` is true (used for
|
||||
// function bodies).
|
||||
|
||||
pp.parseBlock = function(allowStrict) {
|
||||
let node = this.startNode(), first = true, oldStrict
|
||||
node.body = []
|
||||
this.expect(tt.braceL)
|
||||
while (!this.eat(tt.braceR)) {
|
||||
let stmt = this.parseStatement(true)
|
||||
node.body.push(stmt)
|
||||
if (first && allowStrict && this.isUseStrict(stmt)) {
|
||||
oldStrict = this.strict
|
||||
this.setStrict(this.strict = true)
|
||||
}
|
||||
first = false
|
||||
}
|
||||
if (oldStrict === false) this.setStrict(false)
|
||||
return this.finishNode(node, "BlockStatement")
|
||||
}
|
||||
|
||||
// Parse a regular `for` loop. The disambiguation code in
|
||||
// `parseStatement` will already have parsed the init statement or
|
||||
// expression.
|
||||
|
||||
pp.parseFor = function(node, init) {
|
||||
node.init = init
|
||||
this.expect(tt.semi)
|
||||
node.test = this.type === tt.semi ? null : this.parseExpression()
|
||||
this.expect(tt.semi)
|
||||
node.update = this.type === tt.parenR ? null : this.parseExpression()
|
||||
this.expect(tt.parenR)
|
||||
node.body = this.parseStatement(false)
|
||||
this.labels.pop()
|
||||
return this.finishNode(node, "ForStatement")
|
||||
}
|
||||
|
||||
// Parse a `for`/`in` and `for`/`of` loop, which are almost
|
||||
// same from parser's perspective.
|
||||
|
||||
pp.parseForIn = function(node, init) {
|
||||
let type = this.type === tt._in ? "ForInStatement" : "ForOfStatement"
|
||||
this.next()
|
||||
node.left = init
|
||||
node.right = this.parseExpression()
|
||||
this.expect(tt.parenR)
|
||||
node.body = this.parseStatement(false)
|
||||
this.labels.pop()
|
||||
return this.finishNode(node, type)
|
||||
}
|
||||
|
||||
// Parse a list of variable declarations.
|
||||
|
||||
pp.parseVar = function(node, isFor, kind) {
|
||||
node.declarations = []
|
||||
node.kind = kind.keyword
|
||||
for (;;) {
|
||||
let decl = this.startNode()
|
||||
this.parseVarHead(decl)
|
||||
if (this.eat(tt.eq)) {
|
||||
decl.init = this.parseMaybeAssign(isFor)
|
||||
} else if (kind === tt._const && !(this.type === tt._in || (this.options.ecmaVersion >= 6 && this.isContextual("of")))) {
|
||||
this.unexpected()
|
||||
} else if (decl.id.type != "Identifier" && !(isFor && (this.type === tt._in || this.isContextual("of")))) {
|
||||
this.raise(this.lastTokEnd, "Complex binding patterns require an initialization value")
|
||||
} else {
|
||||
decl.init = null
|
||||
}
|
||||
node.declarations.push(this.finishNode(decl, "VariableDeclarator"))
|
||||
if (!this.eat(tt.comma)) break
|
||||
}
|
||||
return node
|
||||
}
|
||||
|
||||
pp.parseVarHead = function (decl) {
|
||||
decl.id = this.parseBindingAtom()
|
||||
this.checkLVal(decl.id, true)
|
||||
}
|
||||
|
||||
// Parse a function declaration or literal (depending on the
|
||||
// `isStatement` parameter).
|
||||
|
||||
pp.parseFunction = function(node, isStatement, allowExpressionBody, isAsync) {
|
||||
this.initFunction(node, isAsync)
|
||||
if (this.options.ecmaVersion >= 6)
|
||||
node.generator = this.eat(tt.star)
|
||||
if (isStatement || this.type === tt.name)
|
||||
node.id = this.parseIdent()
|
||||
this.parseFunctionParams(node);
|
||||
this.parseFunctionBody(node, allowExpressionBody)
|
||||
return this.finishNode(node, isStatement ? "FunctionDeclaration" : "FunctionExpression")
|
||||
}
|
||||
|
||||
pp.parseFunctionParams = function(node) {
|
||||
this.expect(tt.parenL)
|
||||
node.params = this.parseBindingList(tt.parenR, false, false)
|
||||
}
|
||||
|
||||
// Parse a class declaration or literal (depending on the
|
||||
// `isStatement` parameter).
|
||||
|
||||
pp.parseClass = function(node, isStatement) {
|
||||
this.next()
|
||||
node.id = this.type === tt.name ? this.parseIdent() : isStatement ? this.unexpected() : null
|
||||
node.superClass = this.eat(tt._extends) ? this.parseExprSubscripts() : null
|
||||
let classBody = this.startNode()
|
||||
classBody.body = []
|
||||
this.expect(tt.braceL)
|
||||
while (!this.eat(tt.braceR)) {
|
||||
if (this.eat(tt.semi)) continue
|
||||
let method = this.startNode()
|
||||
let isGenerator = this.eat(tt.star)
|
||||
this.parsePropertyName(method)
|
||||
if (this.type !== tt.parenL && !method.computed && method.key.type === "Identifier" &&
|
||||
method.key.name === "static") {
|
||||
if (isGenerator) this.unexpected()
|
||||
method['static'] = true
|
||||
isGenerator = this.eat(tt.star)
|
||||
this.parsePropertyName(method)
|
||||
} else {
|
||||
method['static'] = false
|
||||
}
|
||||
if (this.options.features["es7.asyncFunctions"] && this.type !== tt.parenL &&
|
||||
!method.computed && method.key.type === "Identifier" && method.key.name === "async") {
|
||||
isAsync = true;
|
||||
this.parsePropertyName(method);
|
||||
}
|
||||
method.kind = "method"
|
||||
if (!method.computed && !isGenerator) {
|
||||
if (method.key.type === "Identifier") {
|
||||
if (this.type !== tt.parenL && (method.key.name === "get" || method.key.name === "set")) {
|
||||
method.kind = method.key.name
|
||||
this.parsePropertyName(method)
|
||||
} else if (!method['static'] && method.key.name === "constructor") {
|
||||
method.kind = "constructor"
|
||||
}
|
||||
} else if (!method['static'] && method.key.type === "Literal" && method.key.value === "constructor") {
|
||||
method.kind = "constructor"
|
||||
}
|
||||
}
|
||||
method.value = this.parseMethod(isGenerator)
|
||||
classBody.body.push(this.finishNode(method, "MethodDefinition"))
|
||||
}
|
||||
node.body = this.finishNode(classBody, "ClassBody")
|
||||
return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression")
|
||||
}
|
||||
|
||||
pp.parseClass = function(node, isStatement) {
|
||||
this.next()
|
||||
this.parseClassId(node, isStatement)
|
||||
this.parseClassSuper(node)
|
||||
var classBody = this.startNode()
|
||||
classBody.body = []
|
||||
this.expect(tt.braceL)
|
||||
while (!this.eat(tt.braceR)) {
|
||||
if (this.eat(tt.semi)) continue
|
||||
var method = this.startNode()
|
||||
var isGenerator = this.eat(tt.star), isAsync = false
|
||||
this.parsePropertyName(method)
|
||||
if (this.type !== tt.parenL && !method.computed && method.key.type === "Identifier" &&
|
||||
method.key.name === "static") {
|
||||
if (isGenerator) this.unexpected()
|
||||
method['static'] = true
|
||||
isGenerator = this.eat(tt.star)
|
||||
this.parsePropertyName(method)
|
||||
} else {
|
||||
method['static'] = false
|
||||
}
|
||||
if (this.options.features["es7.asyncFunctions"] && this.type !== tt.parenL &&
|
||||
!method.computed && method.key.type === "Identifier" && method.key.name === "async") {
|
||||
isAsync = true
|
||||
this.parsePropertyName(method)
|
||||
}
|
||||
method.kind = "method"
|
||||
if (!method.computed && !isGenerator) {
|
||||
if (method.key.type === "Identifier") {
|
||||
if (this.type !== tt.parenL && (method.key.name === "get" || method.key.name === "set")) {
|
||||
method.kind = method.key.name
|
||||
this.parsePropertyName(method)
|
||||
} else if (!method['static'] && method.key.name === "constructor") {
|
||||
method.kind = "constructor"
|
||||
}
|
||||
} else if (!method['static'] && method.key.type === "Literal" && method.key.value === "constructor") {
|
||||
method.kind = "constructor"
|
||||
}
|
||||
}
|
||||
this.parseClassMethod(classBody, method, isGenerator, isAsync)
|
||||
}
|
||||
node.body = this.finishNode(classBody, "ClassBody")
|
||||
return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression")
|
||||
}
|
||||
|
||||
pp.parseClassMethod = function (classBody, method, isGenerator, isAsync) {
|
||||
method.value = this.parseMethod(isGenerator, isAsync)
|
||||
classBody.body.push(this.finishNode(method, "MethodDefinition"))
|
||||
}
|
||||
|
||||
pp.parseClassId = function (node, isStatement) {
|
||||
node.id = this.type === tt.name ? this.parseIdent() : isStatement ? this.unexpected() : null
|
||||
}
|
||||
|
||||
pp.parseClassSuper = function (node) {
|
||||
node.superClass = this.eat(tt._extends) ? this.parseExprSubscripts() : null
|
||||
}
|
||||
|
||||
// Parses module export declaration.
|
||||
|
||||
pp.parseExport = function(node) {
|
||||
this.next()
|
||||
// export * from '...'
|
||||
if (this.eat(tt.star)) {
|
||||
this.expectContextual("from")
|
||||
node.source = this.type === tt.string ? this.parseExprAtom() : this.unexpected()
|
||||
this.semicolon()
|
||||
return this.finishNode(node, "ExportAllDeclaration")
|
||||
}
|
||||
if (this.eat(tt._default)) { // export default ...
|
||||
let expr = this.parseMaybeAssign()
|
||||
let needsSemi = false
|
||||
if (expr.id) switch (expr.type) {
|
||||
case "FunctionExpression": expr.type = "FunctionDeclaration"; break
|
||||
case "ClassExpression": expr.type = "ClassDeclaration"; break
|
||||
default: needsSemi = true
|
||||
}
|
||||
node.declaration = expr
|
||||
if (needsSemi) this.semicolon()
|
||||
return this.finishNode(node, "ExportDefaultDeclaration")
|
||||
}
|
||||
// export var|const|let|function|class ...
|
||||
if (this.type.keyword || this.shouldParseExportDeclaration()) {
|
||||
node.declaration = this.parseStatement(true)
|
||||
node.specifiers = []
|
||||
node.source = null
|
||||
} else { // export { x, y as z } [from '...']
|
||||
node.declaration = null
|
||||
node.specifiers = this.parseExportSpecifiers()
|
||||
if (this.eatContextual("from")) {
|
||||
node.source = this.type === tt.string ? this.parseExprAtom() : this.unexpected()
|
||||
} else {
|
||||
node.source = null
|
||||
}
|
||||
this.semicolon()
|
||||
}
|
||||
return this.finishNode(node, "ExportNamedDeclaration")
|
||||
}
|
||||
|
||||
pp.shouldParseExportDeclaration = function () {
|
||||
return this.options.features["es7.asyncFunctions"] && this.isContextual("async")
|
||||
}
|
||||
|
||||
// Parses a comma-separated list of module exports.
|
||||
|
||||
pp.parseExportSpecifiers = function() {
|
||||
let nodes = [], first = true
|
||||
// export { x, y as z } [from '...']
|
||||
this.expect(tt.braceL)
|
||||
while (!this.eat(tt.braceR)) {
|
||||
if (!first) {
|
||||
this.expect(tt.comma)
|
||||
if (this.afterTrailingComma(tt.braceR)) break
|
||||
} else first = false
|
||||
|
||||
let node = this.startNode()
|
||||
node.local = this.parseIdent(this.type === tt._default)
|
||||
node.exported = this.eatContextual("as") ? this.parseIdent(true) : node.local
|
||||
nodes.push(this.finishNode(node, "ExportSpecifier"))
|
||||
}
|
||||
return nodes
|
||||
}
|
||||
|
||||
// Parses import declaration.
|
||||
|
||||
pp.parseImport = function(node) {
|
||||
this.next()
|
||||
// import '...'
|
||||
if (this.type === tt.string) {
|
||||
node.specifiers = empty
|
||||
node.source = this.parseExprAtom()
|
||||
node.kind = ""
|
||||
} else {
|
||||
node.specifiers = []
|
||||
this.parseImportSpecifiers(node)
|
||||
this.expectContextual("from")
|
||||
node.source = this.type === tt.string ? this.parseExprAtom() : this.unexpected()
|
||||
}
|
||||
this.semicolon()
|
||||
return this.finishNode(node, "ImportDeclaration")
|
||||
}
|
||||
|
||||
// Parses a comma-separated list of module imports.
|
||||
|
||||
pp.parseImportSpecifiers = function(node) {
|
||||
var first = true
|
||||
if (this.type === tt.name) {
|
||||
// import defaultObj, { x, y as z } from '...'
|
||||
var start = this.markPosition()
|
||||
node.specifiers.push(this.parseImportSpecifierDefault(this.parseIdent(), start))
|
||||
if (!this.eat(tt.comma)) return
|
||||
}
|
||||
if (this.type === tt.star) {
|
||||
var specifier = this.startNode()
|
||||
this.next()
|
||||
this.expectContextual("as")
|
||||
specifier.local = this.parseIdent()
|
||||
this.checkLVal(specifier.local, true)
|
||||
node.specifiers.push(this.finishNode(specifier, "ImportNamespaceSpecifier"))
|
||||
return
|
||||
}
|
||||
this.expect(tt.braceL)
|
||||
while (!this.eat(tt.braceR)) {
|
||||
if (!first) {
|
||||
this.expect(tt.comma)
|
||||
if (this.afterTrailingComma(tt.braceR)) break
|
||||
} else first = false
|
||||
|
||||
var specifier = this.startNode()
|
||||
specifier.imported = this.parseIdent(true)
|
||||
specifier.local = this.eatContextual("as") ? this.parseIdent() : specifier.imported
|
||||
this.checkLVal(specifier.local, true)
|
||||
node.specifiers.push(this.finishNode(specifier, "ImportSpecifier"))
|
||||
}
|
||||
}
|
||||
|
||||
pp.parseImportSpecifierDefault = function (id, start) {
|
||||
var node = this.startNodeAt(start)
|
||||
node.local = id
|
||||
this.checkLVal(node.local, true)
|
||||
return this.finishNode(node, "ImportDefaultSpecifier")
|
||||
}
|
||||
103
src/tokencontext.js
Executable file
103
src/tokencontext.js
Executable file
@ -0,0 +1,103 @@
|
||||
// The algorithm used to determine whether a regexp can appear at a
|
||||
// given point in the program is loosely based on sweet.js' approach.
|
||||
// See https://github.com/mozilla/sweet.js/wiki/design
|
||||
|
||||
import {Parser} from "./state"
|
||||
import {types as tt} from "./tokentype"
|
||||
import {lineBreak} from "./whitespace"
|
||||
|
||||
export class TokContext {
|
||||
constructor(token, isExpr, preserveSpace, override) {
|
||||
this.token = token
|
||||
this.isExpr = isExpr
|
||||
this.preserveSpace = preserveSpace
|
||||
this.override = override
|
||||
}
|
||||
}
|
||||
|
||||
export const types = {
|
||||
b_stat: new TokContext("{", false),
|
||||
b_expr: new TokContext("{", true),
|
||||
b_tmpl: new TokContext("${", true),
|
||||
p_stat: new TokContext("(", false),
|
||||
p_expr: new TokContext("(", true),
|
||||
q_tmpl: new TokContext("`", true, true, p => p.readTmplToken()),
|
||||
f_expr: new TokContext("function", true)
|
||||
}
|
||||
|
||||
const pp = Parser.prototype
|
||||
|
||||
pp.initialContext = function() {
|
||||
return [types.b_stat]
|
||||
}
|
||||
|
||||
pp.braceIsBlock = function(prevType) {
|
||||
let parent
|
||||
if (prevType === tt.colon && (parent = this.curContext()).token == "{")
|
||||
return !parent.isExpr
|
||||
if (prevType === tt._return)
|
||||
return lineBreak.test(this.input.slice(this.lastTokEnd, this.start))
|
||||
if (prevType === tt._else || prevType === tt.semi || prevType === tt.eof)
|
||||
return true
|
||||
if (prevType == tt.braceL)
|
||||
return this.curContext() === types.b_stat
|
||||
return !this.exprAllowed
|
||||
}
|
||||
|
||||
pp.updateContext = function(prevType) {
|
||||
let update, type = this.type
|
||||
if (type.keyword && prevType == tt.dot)
|
||||
this.exprAllowed = false
|
||||
else if (update = type.updateContext)
|
||||
update.call(this, prevType)
|
||||
else
|
||||
this.exprAllowed = type.beforeExpr
|
||||
}
|
||||
|
||||
// Token-specific context update code
|
||||
|
||||
tt.parenR.updateContext = tt.braceR.updateContext = function() {
|
||||
let out = this.context.pop()
|
||||
if (out === types.b_stat && this.curContext() === types.f_expr) {
|
||||
this.context.pop()
|
||||
this.exprAllowed = false
|
||||
} else if (out === types.b_tmpl) {
|
||||
this.exprAllowed = true
|
||||
} else {
|
||||
this.exprAllowed = !(out && out.isExpr)
|
||||
}
|
||||
}
|
||||
|
||||
tt.braceL.updateContext = function(prevType) {
|
||||
this.context.push(this.braceIsBlock(prevType) ? types.b_stat : types.b_expr)
|
||||
this.exprAllowed = true
|
||||
}
|
||||
|
||||
tt.dollarBraceL.updateContext = function() {
|
||||
this.context.push(types.b_tmpl)
|
||||
this.exprAllowed = true
|
||||
}
|
||||
|
||||
tt.parenL.updateContext = function(prevType) {
|
||||
let statementParens = prevType === tt._if || prevType === tt._for || prevType === tt._with || prevType === tt._while
|
||||
this.context.push(statementParens ? types.p_stat : types.p_expr)
|
||||
this.exprAllowed = true
|
||||
}
|
||||
|
||||
tt.incDec.updateContext = function() {
|
||||
// tokExprAllowed stays unchanged
|
||||
}
|
||||
|
||||
tt._function.updateContext = function() {
|
||||
if (this.curContext() !== types.b_stat)
|
||||
this.context.push(types.f_expr)
|
||||
this.exprAllowed = false
|
||||
}
|
||||
|
||||
tt.backQuote.updateContext = function() {
|
||||
if (this.curContext() === types.q_tmpl)
|
||||
this.context.pop()
|
||||
else
|
||||
this.context.push(types.q_tmpl)
|
||||
this.exprAllowed = false
|
||||
}
|
||||
680
src/tokenize.js
Executable file
680
src/tokenize.js
Executable file
@ -0,0 +1,680 @@
|
||||
import {isIdentifierStart, isIdentifierChar} from "./identifier"
|
||||
import {types as tt, keywords as keywordTypes} from "./tokentype"
|
||||
import {Parser} from "./state"
|
||||
import {SourceLocation} from "./location"
|
||||
import {lineBreak, lineBreakG, isNewLine, nonASCIIwhitespace} from "./whitespace"
|
||||
|
||||
// Object type used to represent tokens. Note that normally, tokens
|
||||
// simply exist as properties on the parser object. This is only
|
||||
// used for the onToken callback and the external tokenizer.
|
||||
|
||||
export class Token {
|
||||
constructor(p) {
|
||||
this.type = p.type
|
||||
this.value = p.value
|
||||
this.start = p.start
|
||||
this.end = p.end
|
||||
if (p.options.locations)
|
||||
this.loc = new SourceLocation(p, p.startLoc, p.endLoc)
|
||||
if (p.options.ranges)
|
||||
this.range = [p.start, p.end]
|
||||
}
|
||||
}
|
||||
|
||||
// ## Tokenizer
|
||||
|
||||
const pp = Parser.prototype
|
||||
|
||||
// Move to the next token
|
||||
|
||||
pp.next = function() {
|
||||
if (this.options.onToken)
|
||||
this.options.onToken(new Token(this))
|
||||
|
||||
this.lastTokEnd = this.end
|
||||
this.lastTokStart = this.start
|
||||
this.lastTokEndLoc = this.endLoc
|
||||
this.lastTokStartLoc = this.startLoc
|
||||
this.nextToken()
|
||||
}
|
||||
|
||||
pp.getToken = function() {
|
||||
this.next()
|
||||
return new Token(this)
|
||||
}
|
||||
|
||||
// If we're in an ES6 environment, make parsers iterable
|
||||
if (typeof Symbol !== "undefined")
|
||||
pp[Symbol.iterator] = function () {
|
||||
let self = this
|
||||
return {next: function () {
|
||||
let token = self.getToken()
|
||||
return {
|
||||
done: token.type === tt.eof,
|
||||
value: token
|
||||
}
|
||||
}}
|
||||
}
|
||||
|
||||
// Toggle strict mode. Re-reads the next number or string to please
|
||||
// pedantic tests (`"use strict"; 010;` should fail).
|
||||
|
||||
pp.setStrict = function(strict) {
|
||||
this.strict = strict
|
||||
if (this.type !== tt.num && this.type !== tt.string) return
|
||||
this.pos = this.start
|
||||
if (this.options.locations) {
|
||||
while (this.pos < this.lineStart) {
|
||||
this.lineStart = this.input.lastIndexOf("\n", this.lineStart - 2) + 1
|
||||
--this.curLine
|
||||
}
|
||||
}
|
||||
this.nextToken()
|
||||
}
|
||||
|
||||
pp.curContext = function() {
|
||||
return this.context[this.context.length - 1]
|
||||
}
|
||||
|
||||
// Read a single token, updating the parser object's token-related
|
||||
// properties.
|
||||
|
||||
pp.nextToken = function() {
|
||||
let curContext = this.curContext()
|
||||
if (!curContext || !curContext.preserveSpace) this.skipSpace()
|
||||
|
||||
this.start = this.pos
|
||||
if (this.options.locations) this.startLoc = this.curPosition()
|
||||
if (this.pos >= this.input.length) return this.finishToken(tt.eof)
|
||||
|
||||
if (curContext.override) return curContext.override(this)
|
||||
else this.readToken(this.fullCharCodeAtPos())
|
||||
}
|
||||
|
||||
pp.readToken = function(code) {
|
||||
// Identifier or keyword. '\uXXXX' sequences are allowed in
|
||||
// identifiers, so '\' also dispatches to that.
|
||||
if (isIdentifierStart(code, this.options.ecmaVersion >= 6) || code === 92 /* '\' */)
|
||||
return this.readWord()
|
||||
|
||||
return this.getTokenFromCode(code)
|
||||
}
|
||||
|
||||
pp.fullCharCodeAtPos = function() {
|
||||
let code = this.input.charCodeAt(this.pos)
|
||||
if (code <= 0xd7ff || code >= 0xe000) return code
|
||||
let next = this.input.charCodeAt(this.pos + 1)
|
||||
return (code << 10) + next - 0x35fdc00
|
||||
}
|
||||
|
||||
pp.skipBlockComment = function() {
|
||||
let startLoc = this.options.onComment && this.options.locations && this.curPosition()
|
||||
let start = this.pos, end = this.input.indexOf("*/", this.pos += 2)
|
||||
if (end === -1) this.raise(this.pos - 2, "Unterminated comment")
|
||||
this.pos = end + 2
|
||||
if (this.options.locations) {
|
||||
lineBreakG.lastIndex = start
|
||||
let match
|
||||
while ((match = lineBreakG.exec(this.input)) && match.index < this.pos) {
|
||||
++this.curLine
|
||||
this.lineStart = match.index + match[0].length
|
||||
}
|
||||
}
|
||||
if (this.options.onComment)
|
||||
this.options.onComment(true, this.input.slice(start + 2, end), start, this.pos,
|
||||
startLoc, this.options.locations && this.curPosition())
|
||||
}
|
||||
|
||||
pp.skipLineComment = function(startSkip) {
|
||||
let start = this.pos
|
||||
let startLoc = this.options.onComment && this.options.locations && this.curPosition()
|
||||
let ch = this.input.charCodeAt(this.pos+=startSkip)
|
||||
while (this.pos < this.input.length && ch !== 10 && ch !== 13 && ch !== 8232 && ch !== 8233) {
|
||||
++this.pos
|
||||
ch = this.input.charCodeAt(this.pos)
|
||||
}
|
||||
if (this.options.onComment)
|
||||
this.options.onComment(false, this.input.slice(start + startSkip, this.pos), start, this.pos,
|
||||
startLoc, this.options.locations && this.curPosition())
|
||||
}
|
||||
|
||||
// Called at the start of the parse and after every token. Skips
|
||||
// whitespace and comments, and.
|
||||
|
||||
pp.skipSpace = function() {
|
||||
while (this.pos < this.input.length) {
|
||||
let ch = this.input.charCodeAt(this.pos)
|
||||
if (ch === 32) { // ' '
|
||||
++this.pos
|
||||
} else if (ch === 13) {
|
||||
++this.pos
|
||||
let next = this.input.charCodeAt(this.pos)
|
||||
if (next === 10) {
|
||||
++this.pos
|
||||
}
|
||||
if (this.options.locations) {
|
||||
++this.curLine
|
||||
this.lineStart = this.pos
|
||||
}
|
||||
} else if (ch === 10 || ch === 8232 || ch === 8233) {
|
||||
++this.pos
|
||||
if (this.options.locations) {
|
||||
++this.curLine
|
||||
this.lineStart = this.pos
|
||||
}
|
||||
} else if (ch > 8 && ch < 14) {
|
||||
++this.pos
|
||||
} else if (ch === 47) { // '/'
|
||||
let next = this.input.charCodeAt(this.pos + 1)
|
||||
if (next === 42) { // '*'
|
||||
this.skipBlockComment()
|
||||
} else if (next === 47) { // '/'
|
||||
this.skipLineComment(2)
|
||||
} else break
|
||||
} else if (ch === 160) { // '\xa0'
|
||||
++this.pos
|
||||
} else if (ch >= 5760 && nonASCIIwhitespace.test(String.fromCharCode(ch))) {
|
||||
++this.pos
|
||||
} else {
|
||||
break
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Called at the end of every token. Sets `end`, `val`, and
|
||||
// maintains `context` and `exprAllowed`, and skips the space after
|
||||
// the token, so that the next one's `start` will point at the
|
||||
// right position.
|
||||
|
||||
pp.finishToken = function(type, val) {
|
||||
this.end = this.pos
|
||||
if (this.options.locations) this.endLoc = this.curPosition()
|
||||
let prevType = this.type
|
||||
this.type = type
|
||||
this.value = val
|
||||
|
||||
this.updateContext(prevType)
|
||||
}
|
||||
|
||||
// ### Token reading
|
||||
|
||||
// This is the function that is called to fetch the next token. It
|
||||
// is somewhat obscure, because it works in character codes rather
|
||||
// than characters, and because operator parsing has been inlined
|
||||
// into it.
|
||||
//
|
||||
// All in the name of speed.
|
||||
//
|
||||
pp.readToken_dot = function() {
|
||||
let next = this.input.charCodeAt(this.pos + 1)
|
||||
if (next >= 48 && next <= 57) return this.readNumber(true)
|
||||
let next2 = this.input.charCodeAt(this.pos + 2)
|
||||
if (this.options.ecmaVersion >= 6 && next === 46 && next2 === 46) { // 46 = dot '.'
|
||||
this.pos += 3
|
||||
return this.finishToken(tt.ellipsis)
|
||||
} else {
|
||||
++this.pos
|
||||
return this.finishToken(tt.dot)
|
||||
}
|
||||
}
|
||||
|
||||
pp.readToken_slash = function() { // '/'
|
||||
let next = this.input.charCodeAt(this.pos + 1)
|
||||
if (this.exprAllowed) {++this.pos; return this.readRegexp();}
|
||||
if (next === 61) return this.finishOp(tt.assign, 2)
|
||||
return this.finishOp(tt.slash, 1)
|
||||
}
|
||||
|
||||
pp.readToken_mult_modulo = function(code) { // '%*'
|
||||
var type = code === 42 ? tt.star : tt.modulo
|
||||
var width = 1
|
||||
var next = this.input.charCodeAt(this.pos + 1)
|
||||
|
||||
if (next === 42) { // '*'
|
||||
width++
|
||||
next = this.input.charCodeAt(this.pos + 2)
|
||||
type = tt.exponent
|
||||
}
|
||||
|
||||
if (next === 61) {
|
||||
width++
|
||||
type = tt.assign
|
||||
}
|
||||
|
||||
return this.finishOp(type, width)
|
||||
}
|
||||
|
||||
pp.readToken_pipe_amp = function(code) { // '|&'
|
||||
let next = this.input.charCodeAt(this.pos + 1)
|
||||
if (next === code) return this.finishOp(code === 124 ? tt.logicalOR : tt.logicalAND, 2)
|
||||
if (next === 61) return this.finishOp(tt.assign, 2)
|
||||
return this.finishOp(code === 124 ? tt.bitwiseOR : tt.bitwiseAND, 1)
|
||||
}
|
||||
|
||||
pp.readToken_caret = function() { // '^'
|
||||
let next = this.input.charCodeAt(this.pos + 1)
|
||||
if (next === 61) return this.finishOp(tt.assign, 2)
|
||||
return this.finishOp(tt.bitwiseXOR, 1)
|
||||
}
|
||||
|
||||
pp.readToken_plus_min = function(code) { // '+-'
|
||||
let next = this.input.charCodeAt(this.pos + 1)
|
||||
if (next === code) {
|
||||
if (next == 45 && this.input.charCodeAt(this.pos + 2) == 62 &&
|
||||
lineBreak.test(this.input.slice(this.lastTokEnd, this.pos))) {
|
||||
// A `-->` line comment
|
||||
this.skipLineComment(3)
|
||||
this.skipSpace()
|
||||
return this.nextToken()
|
||||
}
|
||||
return this.finishOp(tt.incDec, 2)
|
||||
}
|
||||
if (next === 61) return this.finishOp(tt.assign, 2)
|
||||
return this.finishOp(tt.plusMin, 1)
|
||||
}
|
||||
|
||||
pp.readToken_lt_gt = function(code) { // '<>'
|
||||
let next = this.input.charCodeAt(this.pos + 1)
|
||||
let size = 1
|
||||
if (next === code) {
|
||||
size = code === 62 && this.input.charCodeAt(this.pos + 2) === 62 ? 3 : 2
|
||||
if (this.input.charCodeAt(this.pos + size) === 61) return this.finishOp(tt.assign, size + 1)
|
||||
return this.finishOp(tt.bitShift, size)
|
||||
}
|
||||
if (next == 33 && code == 60 && this.input.charCodeAt(this.pos + 2) == 45 &&
|
||||
this.input.charCodeAt(this.pos + 3) == 45) {
|
||||
if (this.inModule) unexpected()
|
||||
// `<!--`, an XML-style comment that should be interpreted as a line comment
|
||||
this.skipLineComment(4)
|
||||
this.skipSpace()
|
||||
return this.nextToken()
|
||||
}
|
||||
if (next === 61)
|
||||
size = this.input.charCodeAt(this.pos + 2) === 61 ? 3 : 2
|
||||
return this.finishOp(tt.relational, size)
|
||||
}
|
||||
|
||||
pp.readToken_eq_excl = function(code) { // '=!'
|
||||
let next = this.input.charCodeAt(this.pos + 1)
|
||||
if (next === 61) return this.finishOp(tt.equality, this.input.charCodeAt(this.pos + 2) === 61 ? 3 : 2)
|
||||
if (code === 61 && next === 62 && this.options.ecmaVersion >= 6) { // '=>'
|
||||
this.pos += 2
|
||||
return this.finishToken(tt.arrow)
|
||||
}
|
||||
return this.finishOp(code === 61 ? tt.eq : tt.prefix, 1)
|
||||
}
|
||||
|
||||
pp.getTokenFromCode = function(code) {
|
||||
switch (code) {
|
||||
// The interpretation of a dot depends on whether it is followed
|
||||
// by a digit or another two dots.
|
||||
case 46: // '.'
|
||||
return this.readToken_dot()
|
||||
|
||||
// Punctuation tokens.
|
||||
case 40: ++this.pos; return this.finishToken(tt.parenL)
|
||||
case 41: ++this.pos; return this.finishToken(tt.parenR)
|
||||
case 59: ++this.pos; return this.finishToken(tt.semi)
|
||||
case 44: ++this.pos; return this.finishToken(tt.comma)
|
||||
case 91: ++this.pos; return this.finishToken(tt.bracketL)
|
||||
case 93: ++this.pos; return this.finishToken(tt.bracketR)
|
||||
case 123: ++this.pos; return this.finishToken(tt.braceL)
|
||||
case 125: ++this.pos; return this.finishToken(tt.braceR)
|
||||
case 58: ++this.pos; return this.finishToken(tt.colon)
|
||||
case 63: ++this.pos; return this.finishToken(tt.question)
|
||||
|
||||
case 96: // '`'
|
||||
if (this.options.ecmaVersion < 6) break
|
||||
++this.pos
|
||||
return this.finishToken(tt.backQuote)
|
||||
|
||||
case 48: // '0'
|
||||
let next = this.input.charCodeAt(this.pos + 1)
|
||||
if (next === 120 || next === 88) return this.readRadixNumber(16); // '0x', '0X' - hex number
|
||||
if (this.options.ecmaVersion >= 6) {
|
||||
if (next === 111 || next === 79) return this.readRadixNumber(8); // '0o', '0O' - octal number
|
||||
if (next === 98 || next === 66) return this.readRadixNumber(2); // '0b', '0B' - binary number
|
||||
}
|
||||
// Anything else beginning with a digit is an integer, octal
|
||||
// number, or float.
|
||||
case 49: case 50: case 51: case 52: case 53: case 54: case 55: case 56: case 57: // 1-9
|
||||
return this.readNumber(false)
|
||||
|
||||
// Quotes produce strings.
|
||||
case 34: case 39: // '"', "'"
|
||||
return this.readString(code)
|
||||
|
||||
// Operators are parsed inline in tiny state machines. '=' (61) is
|
||||
// often referred to. `finishOp` simply skips the amount of
|
||||
// characters it is given as second argument, and returns a token
|
||||
// of the type given by its first argument.
|
||||
|
||||
case 47: // '/'
|
||||
return this.readToken_slash()
|
||||
|
||||
case 37: case 42: // '%*'
|
||||
return this.readToken_mult_modulo(code)
|
||||
|
||||
case 124: case 38: // '|&'
|
||||
return this.readToken_pipe_amp(code)
|
||||
|
||||
case 94: // '^'
|
||||
return this.readToken_caret()
|
||||
|
||||
case 43: case 45: // '+-'
|
||||
return this.readToken_plus_min(code)
|
||||
|
||||
case 60: case 62: // '<>'
|
||||
return this.readToken_lt_gt(code)
|
||||
|
||||
case 61: case 33: // '=!'
|
||||
return this.readToken_eq_excl(code)
|
||||
|
||||
case 126: // '~'
|
||||
return this.finishOp(tt.prefix, 1)
|
||||
}
|
||||
|
||||
this.raise(this.pos, "Unexpected character '" + codePointToString(code) + "'")
|
||||
}
|
||||
|
||||
pp.finishOp = function(type, size) {
|
||||
let str = this.input.slice(this.pos, this.pos + size)
|
||||
this.pos += size
|
||||
return this.finishToken(type, str)
|
||||
}
|
||||
|
||||
var regexpUnicodeSupport = false
|
||||
try { new RegExp("\uffff", "u"); regexpUnicodeSupport = true }
|
||||
catch(e) {}
|
||||
|
||||
// Parse a regular expression. Some context-awareness is necessary,
|
||||
// since a '/' inside a '[]' set does not end the expression.
|
||||
|
||||
pp.readRegexp = function() {
|
||||
let escaped, inClass, start = this.pos
|
||||
for (;;) {
|
||||
if (this.pos >= this.input.length) this.raise(start, "Unterminated regular expression")
|
||||
let ch = this.input.charAt(this.pos)
|
||||
if (lineBreak.test(ch)) this.raise(start, "Unterminated regular expression")
|
||||
if (!escaped) {
|
||||
if (ch === "[") inClass = true
|
||||
else if (ch === "]" && inClass) inClass = false
|
||||
else if (ch === "/" && !inClass) break
|
||||
escaped = ch === "\\"
|
||||
} else escaped = false
|
||||
++this.pos
|
||||
}
|
||||
let content = this.input.slice(start, this.pos)
|
||||
++this.pos
|
||||
// Need to use `readWord1` because '\uXXXX' sequences are allowed
|
||||
// here (don't ask).
|
||||
let mods = this.readWord1()
|
||||
let tmp = content
|
||||
if (mods) {
|
||||
let validFlags = /^[gmsiy]*$/
|
||||
if (this.options.ecmaVersion >= 6) validFlags = /^[gmsiyu]*$/
|
||||
if (!validFlags.test(mods)) this.raise(start, "Invalid regular expression flag")
|
||||
if (mods.indexOf('u') >= 0 && !regexpUnicodeSupport) {
|
||||
// Replace each astral symbol and every Unicode escape sequence that
|
||||
// possibly represents an astral symbol or a paired surrogate with a
|
||||
// single ASCII symbol to avoid throwing on regular expressions that
|
||||
// are only valid in combination with the `/u` flag.
|
||||
// Note: replacing with the ASCII symbol `x` might cause false
|
||||
// negatives in unlikely scenarios. For example, `[\u{61}-b]` is a
|
||||
// perfectly valid pattern that is equivalent to `[a-b]`, but it would
|
||||
// be replaced by `[x-b]` which throws an error.
|
||||
tmp = tmp.replace(/\\u([a-fA-F0-9]{4})|\\u\{([0-9a-fA-F]+)\}|[\uD800-\uDBFF][\uDC00-\uDFFF]/g, "x")
|
||||
}
|
||||
}
|
||||
// Detect invalid regular expressions.
|
||||
try {
|
||||
new RegExp(tmp)
|
||||
} catch (e) {
|
||||
if (e instanceof SyntaxError) this.raise(start, "Error parsing regular expression: " + e.message)
|
||||
this.raise(e)
|
||||
}
|
||||
// Get a regular expression object for this pattern-flag pair, or `null` in
|
||||
// case the current environment doesn't support the flags it uses.
|
||||
let value
|
||||
try {
|
||||
value = new RegExp(content, mods)
|
||||
} catch (err) {
|
||||
value = null
|
||||
}
|
||||
return this.finishToken(tt.regexp, {pattern: content, flags: mods, value: value})
|
||||
}
|
||||
|
||||
// Read an integer in the given radix. Return null if zero digits
|
||||
// were read, the integer value otherwise. When `len` is given, this
|
||||
// will return `null` unless the integer has exactly `len` digits.
|
||||
|
||||
pp.readInt = function(radix, len) {
|
||||
let start = this.pos, total = 0
|
||||
for (let i = 0, e = len == null ? Infinity : len; i < e; ++i) {
|
||||
let code = this.input.charCodeAt(this.pos), val
|
||||
if (code >= 97) val = code - 97 + 10; // a
|
||||
else if (code >= 65) val = code - 65 + 10; // A
|
||||
else if (code >= 48 && code <= 57) val = code - 48; // 0-9
|
||||
else val = Infinity
|
||||
if (val >= radix) break
|
||||
++this.pos
|
||||
total = total * radix + val
|
||||
}
|
||||
if (this.pos === start || len != null && this.pos - start !== len) return null
|
||||
|
||||
return total
|
||||
}
|
||||
|
||||
pp.readRadixNumber = function(radix) {
|
||||
this.pos += 2; // 0x
|
||||
let val = this.readInt(radix)
|
||||
if (val == null) this.raise(this.start + 2, "Expected number in radix " + radix)
|
||||
if (isIdentifierStart(this.fullCharCodeAtPos())) this.raise(this.pos, "Identifier directly after number")
|
||||
return this.finishToken(tt.num, val)
|
||||
}
|
||||
|
||||
// Read an integer, octal integer, or floating-point number.
|
||||
|
||||
pp.readNumber = function(startsWithDot) {
|
||||
let start = this.pos, isFloat = false, octal = this.input.charCodeAt(this.pos) === 48
|
||||
if (!startsWithDot && this.readInt(10) === null) this.raise(start, "Invalid number")
|
||||
if (this.input.charCodeAt(this.pos) === 46) {
|
||||
++this.pos
|
||||
this.readInt(10)
|
||||
isFloat = true
|
||||
}
|
||||
let next = this.input.charCodeAt(this.pos)
|
||||
if (next === 69 || next === 101) { // 'eE'
|
||||
next = this.input.charCodeAt(++this.pos)
|
||||
if (next === 43 || next === 45) ++this.pos; // '+-'
|
||||
if (this.readInt(10) === null) this.raise(start, "Invalid number")
|
||||
isFloat = true
|
||||
}
|
||||
if (isIdentifierStart(this.fullCharCodeAtPos())) this.raise(this.pos, "Identifier directly after number")
|
||||
|
||||
let str = this.input.slice(start, this.pos), val
|
||||
if (isFloat) val = parseFloat(str)
|
||||
else if (!octal || str.length === 1) val = parseInt(str, 10)
|
||||
else if (/[89]/.test(str) || this.strict) this.raise(start, "Invalid number")
|
||||
else val = parseInt(str, 8)
|
||||
return this.finishToken(tt.num, val)
|
||||
}
|
||||
|
||||
// Read a string value, interpreting backslash-escapes.
|
||||
|
||||
pp.readCodePoint = function() {
|
||||
let ch = this.input.charCodeAt(this.pos), code
|
||||
|
||||
if (ch === 123) {
|
||||
if (this.options.ecmaVersion < 6) this.unexpected()
|
||||
++this.pos
|
||||
code = this.readHexChar(this.input.indexOf('}', this.pos) - this.pos)
|
||||
++this.pos
|
||||
if (code > 0x10FFFF) this.unexpected()
|
||||
} else {
|
||||
code = this.readHexChar(4)
|
||||
}
|
||||
return code
|
||||
}
|
||||
|
||||
function codePointToString(code) {
|
||||
// UTF-16 Decoding
|
||||
if (code <= 0xFFFF) return String.fromCharCode(code)
|
||||
return String.fromCharCode(((code - 0x10000) >> 10) + 0xD800,
|
||||
((code - 0x10000) & 1023) + 0xDC00)
|
||||
}
|
||||
|
||||
pp.readString = function(quote) {
|
||||
let out = "", chunkStart = ++this.pos
|
||||
for (;;) {
|
||||
if (this.pos >= this.input.length) this.raise(this.start, "Unterminated string constant")
|
||||
let ch = this.input.charCodeAt(this.pos)
|
||||
if (ch === quote) break
|
||||
if (ch === 92) { // '\'
|
||||
out += this.input.slice(chunkStart, this.pos)
|
||||
out += this.readEscapedChar()
|
||||
chunkStart = this.pos
|
||||
} else {
|
||||
if (isNewLine(ch)) this.raise(this.start, "Unterminated string constant")
|
||||
++this.pos
|
||||
}
|
||||
}
|
||||
out += this.input.slice(chunkStart, this.pos++)
|
||||
return this.finishToken(tt.string, out)
|
||||
}
|
||||
|
||||
// Reads template string tokens.
|
||||
|
||||
pp.readTmplToken = function() {
|
||||
let out = "", chunkStart = this.pos
|
||||
for (;;) {
|
||||
if (this.pos >= this.input.length) this.raise(this.start, "Unterminated template")
|
||||
let ch = this.input.charCodeAt(this.pos)
|
||||
if (ch === 96 || ch === 36 && this.input.charCodeAt(this.pos + 1) === 123) { // '`', '${'
|
||||
if (this.pos === this.start && this.type === tt.template) {
|
||||
if (ch === 36) {
|
||||
this.pos += 2
|
||||
return this.finishToken(tt.dollarBraceL)
|
||||
} else {
|
||||
++this.pos
|
||||
return this.finishToken(tt.backQuote)
|
||||
}
|
||||
}
|
||||
out += this.input.slice(chunkStart, this.pos)
|
||||
return this.finishToken(tt.template, out)
|
||||
}
|
||||
if (ch === 92) { // '\'
|
||||
out += this.input.slice(chunkStart, this.pos)
|
||||
out += this.readEscapedChar()
|
||||
chunkStart = this.pos
|
||||
} else if (isNewLine(ch)) {
|
||||
out += this.input.slice(chunkStart, this.pos)
|
||||
++this.pos
|
||||
if (ch === 13 && this.input.charCodeAt(this.pos) === 10) {
|
||||
++this.pos
|
||||
out += "\n"
|
||||
} else {
|
||||
out += String.fromCharCode(ch)
|
||||
}
|
||||
if (this.options.locations) {
|
||||
++this.curLine
|
||||
this.lineStart = this.pos
|
||||
}
|
||||
chunkStart = this.pos
|
||||
} else {
|
||||
++this.pos
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Used to read escaped characters
|
||||
|
||||
pp.readEscapedChar = function() {
|
||||
let ch = this.input.charCodeAt(++this.pos)
|
||||
let octal = /^[0-7]+/.exec(this.input.slice(this.pos, this.pos + 3))
|
||||
if (octal) octal = octal[0]
|
||||
while (octal && parseInt(octal, 8) > 255) octal = octal.slice(0, -1)
|
||||
if (octal === "0") octal = null
|
||||
++this.pos
|
||||
if (octal) {
|
||||
if (this.strict) this.raise(this.pos - 2, "Octal literal in strict mode")
|
||||
this.pos += octal.length - 1
|
||||
return String.fromCharCode(parseInt(octal, 8))
|
||||
} else {
|
||||
switch (ch) {
|
||||
case 110: return "\n"; // 'n' -> '\n'
|
||||
case 114: return "\r"; // 'r' -> '\r'
|
||||
case 120: return String.fromCharCode(this.readHexChar(2)); // 'x'
|
||||
case 117: return codePointToString(this.readCodePoint()); // 'u'
|
||||
case 116: return "\t"; // 't' -> '\t'
|
||||
case 98: return "\b"; // 'b' -> '\b'
|
||||
case 118: return "\u000b"; // 'v' -> '\u000b'
|
||||
case 102: return "\f"; // 'f' -> '\f'
|
||||
case 48: return "\0"; // 0 -> '\0'
|
||||
case 13: if (this.input.charCodeAt(this.pos) === 10) ++this.pos; // '\r\n'
|
||||
case 10: // ' \n'
|
||||
if (this.options.locations) { this.lineStart = this.pos; ++this.curLine }
|
||||
return ""
|
||||
default: return String.fromCharCode(ch)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Used to read character escape sequences ('\x', '\u', '\U').
|
||||
|
||||
pp.readHexChar = function(len) {
|
||||
let n = this.readInt(16, len)
|
||||
if (n === null) this.raise(this.start, "Bad character escape sequence")
|
||||
return n
|
||||
}
|
||||
|
||||
// Used to signal to callers of `readWord1` whether the word
|
||||
// contained any escape sequences. This is needed because words with
|
||||
// escape sequences must not be interpreted as keywords.
|
||||
|
||||
var containsEsc
|
||||
|
||||
// Read an identifier, and return it as a string. Sets `containsEsc`
|
||||
// to whether the word contained a '\u' escape.
|
||||
//
|
||||
// Incrementally adds only escaped chars, adding other chunks as-is
|
||||
// as a micro-optimization.
|
||||
|
||||
pp.readWord1 = function() {
|
||||
containsEsc = false
|
||||
let word = "", first = true, chunkStart = this.pos
|
||||
let astral = this.options.ecmaVersion >= 6
|
||||
while (this.pos < this.input.length) {
|
||||
let ch = this.fullCharCodeAtPos()
|
||||
if (isIdentifierChar(ch, astral)) {
|
||||
this.pos += ch <= 0xffff ? 1 : 2
|
||||
} else if (ch === 92) { // "\"
|
||||
containsEsc = true
|
||||
word += this.input.slice(chunkStart, this.pos)
|
||||
let escStart = this.pos
|
||||
if (this.input.charCodeAt(++this.pos) != 117) // "u"
|
||||
this.raise(this.pos, "Expecting Unicode escape sequence \\uXXXX")
|
||||
++this.pos
|
||||
let esc = this.readCodePoint()
|
||||
if (!(first ? isIdentifierStart : isIdentifierChar)(esc, astral))
|
||||
this.raise(escStart, "Invalid Unicode escape")
|
||||
word += codePointToString(esc)
|
||||
chunkStart = this.pos
|
||||
} else {
|
||||
break
|
||||
}
|
||||
first = false
|
||||
}
|
||||
return word + this.input.slice(chunkStart, this.pos)
|
||||
}
|
||||
|
||||
// Read an identifier or keyword token. Will check for reserved
|
||||
// words when necessary.
|
||||
|
||||
pp.readWord = function() {
|
||||
let word = this.readWord1()
|
||||
let type = tt.name
|
||||
if ((this.options.ecmaVersion >= 6 || !containsEsc) && this.isKeyword(word))
|
||||
type = keywordTypes[word]
|
||||
return this.finishToken(type, word)
|
||||
}
|
||||
144
src/tokentype.js
Executable file
144
src/tokentype.js
Executable file
@ -0,0 +1,144 @@
|
||||
// ## Token types
|
||||
|
||||
// The assignment of fine-grained, information-carrying type objects
|
||||
// allows the tokenizer to store the information it has about a
|
||||
// token in a way that is very cheap for the parser to look up.
|
||||
|
||||
// All token type variables start with an underscore, to make them
|
||||
// easy to recognize.
|
||||
|
||||
// The `beforeExpr` property is used to disambiguate between regular
|
||||
// expressions and divisions. It is set on all token types that can
|
||||
// be followed by an expression (thus, a slash after them would be a
|
||||
// regular expression).
|
||||
//
|
||||
// `isLoop` marks a keyword as starting a loop, which is important
|
||||
// to know when parsing a label, in order to allow or disallow
|
||||
// continue jumps to that label.
|
||||
|
||||
export class TokenType {
|
||||
constructor(label, conf = {}) {
|
||||
this.label = label
|
||||
this.keyword = conf.keyword
|
||||
this.beforeExpr = !!conf.beforeExpr
|
||||
this.startsExpr = !!conf.startsExpr
|
||||
this.rightAssociative = !!conf.rightAssociative
|
||||
this.isLoop = !!conf.isLoop
|
||||
this.isAssign = !!conf.isAssign
|
||||
this.prefix = !!conf.prefix
|
||||
this.postfix = !!conf.postfix
|
||||
this.binop = conf.binop || null
|
||||
this.updateContext = null
|
||||
}
|
||||
}
|
||||
|
||||
function binop(name, prec) {
|
||||
return new TokenType(name, {beforeExpr: true, binop: prec})
|
||||
}
|
||||
const beforeExpr = {beforeExpr: true}, startsExpr = {startsExpr: true}
|
||||
|
||||
export const types = {
|
||||
num: new TokenType("num", startsExpr),
|
||||
regexp: new TokenType("regexp", startsExpr),
|
||||
string: new TokenType("string", startsExpr),
|
||||
name: new TokenType("name", startsExpr),
|
||||
eof: new TokenType("eof"),
|
||||
|
||||
// Punctuation token types.
|
||||
bracketL: new TokenType("[", {beforeExpr: true, startsExpr: true}),
|
||||
bracketR: new TokenType("]"),
|
||||
braceL: new TokenType("{", {beforeExpr: true, startsExpr: true}),
|
||||
braceR: new TokenType("}"),
|
||||
parenL: new TokenType("(", {beforeExpr: true, startsExpr: true}),
|
||||
parenR: new TokenType(")"),
|
||||
comma: new TokenType(",", beforeExpr),
|
||||
semi: new TokenType(";", beforeExpr),
|
||||
colon: new TokenType(":", beforeExpr),
|
||||
dot: new TokenType("."),
|
||||
question: new TokenType("?", beforeExpr),
|
||||
arrow: new TokenType("=>", beforeExpr),
|
||||
template: new TokenType("template"),
|
||||
ellipsis: new TokenType("...", beforeExpr),
|
||||
backQuote: new TokenType("`", startsExpr),
|
||||
dollarBraceL: new TokenType("${", {beforeExpr: true, startsExpr: true}),
|
||||
|
||||
// Operators. These carry several kinds of properties to help the
|
||||
// parser use them properly (the presence of these properties is
|
||||
// what categorizes them as operators).
|
||||
//
|
||||
// `binop`, when present, specifies that this operator is a binary
|
||||
// operator, and will refer to its precedence.
|
||||
//
|
||||
// `prefix` and `postfix` mark the operator as a prefix or postfix
|
||||
// unary operator.
|
||||
//
|
||||
// `isAssign` marks all of `=`, `+=`, `-=` etcetera, which act as
|
||||
// binary operators with a very low precedence, that should result
|
||||
// in AssignmentExpression nodes.
|
||||
|
||||
eq: new TokenType("=", {beforeExpr: true, isAssign: true}),
|
||||
assign: new TokenType("_=", {beforeExpr: true, isAssign: true}),
|
||||
incDec: new TokenType("++/--", {prefix: true, postfix: true, startsExpr: true}),
|
||||
prefix: new TokenType("prefix", {beforeExpr: true, prefix: true, startsExpr: true}),
|
||||
logicalOR: binop("||", 1),
|
||||
logicalAND: binop("&&", 2),
|
||||
bitwiseOR: binop("|", 3),
|
||||
bitwiseXOR: binop("^", 4),
|
||||
bitwiseAND: binop("&", 5),
|
||||
equality: binop("==/!=", 6),
|
||||
relational: binop("</>", 7),
|
||||
bitShift: binop("<</>>", 8),
|
||||
plusMin: new TokenType("+/-", {beforeExpr: true, binop: 9, prefix: true, startsExpr: true}),
|
||||
modulo: binop("%", 10),
|
||||
star: binop("*", 10),
|
||||
slash: binop("/", 10),
|
||||
exponent: new TokenType("**", {beforeExpr: true, binop: 11, rightAssociative: true})
|
||||
}
|
||||
|
||||
// Map keyword names to token types.
|
||||
|
||||
export const keywords = {}
|
||||
|
||||
// Succinct definitions of keyword token types
|
||||
function kw(name, options = {}) {
|
||||
options.keyword = name
|
||||
keywords[name] = types["_" + name] = new TokenType(name, options)
|
||||
}
|
||||
|
||||
kw("break")
|
||||
kw("case", beforeExpr)
|
||||
kw("catch")
|
||||
kw("continue")
|
||||
kw("debugger")
|
||||
kw("default")
|
||||
kw("do", {isLoop: true})
|
||||
kw("else", beforeExpr)
|
||||
kw("finally")
|
||||
kw("for", {isLoop: true})
|
||||
kw("function")
|
||||
kw("if")
|
||||
kw("return", beforeExpr)
|
||||
kw("switch")
|
||||
kw("throw", beforeExpr)
|
||||
kw("try")
|
||||
kw("var")
|
||||
kw("let")
|
||||
kw("const")
|
||||
kw("while", {isLoop: true})
|
||||
kw("with")
|
||||
kw("new", {beforeExpr: true, startsExpr: true})
|
||||
kw("this", startsExpr)
|
||||
kw("super", startsExpr)
|
||||
kw("class")
|
||||
kw("extends", beforeExpr)
|
||||
kw("export")
|
||||
kw("import")
|
||||
kw("yield", {beforeExpr: true, startsExpr: true})
|
||||
kw("null", startsExpr)
|
||||
kw("true", startsExpr)
|
||||
kw("false", startsExpr)
|
||||
kw("in", {beforeExpr: true, binop: 7})
|
||||
kw("instanceof", {beforeExpr: true, binop: 7})
|
||||
kw("typeof", {beforeExpr: true, prefix: true, startsExpr: true})
|
||||
kw("void", {beforeExpr: true, prefix: true, startsExpr: true})
|
||||
kw("delete", {beforeExpr: true, prefix: true, startsExpr: true})
|
||||
9
src/util.js
Executable file
9
src/util.js
Executable file
@ -0,0 +1,9 @@
|
||||
export function isArray(obj) {
|
||||
return Object.prototype.toString.call(obj) === "[object Array]"
|
||||
}
|
||||
|
||||
// Checks if an object has a property.
|
||||
|
||||
export function has(obj, propName) {
|
||||
return Object.prototype.hasOwnProperty.call(obj, propName)
|
||||
}
|
||||
12
src/whitespace.js
Executable file
12
src/whitespace.js
Executable file
@ -0,0 +1,12 @@
|
||||
// Matches a whole line break (where CRLF is considered a single
|
||||
// line break). Used to count lines.
|
||||
|
||||
export const lineBreak = /\r\n?|\n|\u2028|\u2029/
|
||||
export const lineBreakG = new RegExp(lineBreak.source, "g")
|
||||
|
||||
export function isNewLine(code) {
|
||||
return code === 10 || code === 13 || code === 0x2028 || code == 0x2029
|
||||
}
|
||||
|
||||
export const nonASCIIwhitespace = /[\u1680\u180e\u2000-\u200a\u202f\u205f\u3000\ufeff]/
|
||||
|
||||
112
test/.subl38b.tmp
Normal file
112
test/.subl38b.tmp
Normal file
@ -0,0 +1,112 @@
|
||||
(function() {
|
||||
var driver, acorn;
|
||||
|
||||
if (typeof require !== "undefined") {
|
||||
driver = require("./driver.js");
|
||||
require("./tests.js");
|
||||
require("./tests-harmony.js");
|
||||
require("babel/register")
|
||||
acorn = require("../src")
|
||||
} else {
|
||||
driver = window;
|
||||
acorn = window.acorn;
|
||||
}
|
||||
|
||||
var htmlLog = typeof document === "object" && document.getElementById('log');
|
||||
var htmlGroup = htmlLog;
|
||||
|
||||
function group(name) {
|
||||
if (htmlGroup) {
|
||||
var parentGroup = htmlGroup;
|
||||
htmlGroup = document.createElement("ul");
|
||||
var item = document.createElement("li");
|
||||
item.textContent = name;
|
||||
item.appendChild(htmlGroup);
|
||||
parentGroup.appendChild(item);
|
||||
}
|
||||
if (typeof console === "object" && console.group) {
|
||||
console.group(name);
|
||||
}
|
||||
}
|
||||
|
||||
function groupEnd() {
|
||||
if (htmlGroup) {
|
||||
htmlGroup = htmlGroup.parentElement.parentElement;
|
||||
}
|
||||
if (typeof console === "object" && console.groupEnd) {
|
||||
console.groupEnd(name);
|
||||
}
|
||||
}
|
||||
|
||||
function log(title, message) {
|
||||
if (htmlGroup) {
|
||||
var elem = document.createElement("li");
|
||||
elem.innerHTML = "<b>" + title + "</b> " + message;
|
||||
htmlGroup.appendChild(elem);
|
||||
}
|
||||
if (typeof console === "object") console.log(title, message);
|
||||
}
|
||||
|
||||
var stats, modes = {
|
||||
Normal: {
|
||||
config: {
|
||||
parse: acorn.parse
|
||||
}
|
||||
},
|
||||
Loose: {
|
||||
config: {
|
||||
parse: acorn.parse_dammit,
|
||||
loose: true,
|
||||
filter: function (test) {
|
||||
var opts = test.options || {};
|
||||
if (opts.loose === false) return false;
|
||||
return (opts.ecmaVersion || 5) <= 6;
|
||||
}
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
function report(state, code, message) {
|
||||
if (state != "ok") {++stats.failed; log(code, message);}
|
||||
++stats.testsRun;
|
||||
}
|
||||
|
||||
group("Errors");
|
||||
|
||||
for (var name in modes) {
|
||||
group(name);
|
||||
var mode = modes[name];
|
||||
stats = mode.stats = {testsRun: 0, failed: 0};
|
||||
var t0 = +new Date;
|
||||
driver.runTests(mode.config, report);
|
||||
mode.stats.duration = +new Date - t0;
|
||||
groupEnd();
|
||||
}
|
||||
|
||||
groupEnd();
|
||||
|
||||
function outputStats(name, stats) {
|
||||
log(name + ":", stats.testsRun + " tests run in " + stats.duration + "ms; " +
|
||||
(stats.failed ? stats.failed + " failures." : "all passed."));
|
||||
}
|
||||
|
||||
var total = {testsRun: 0, failed: 0, duration: 0};
|
||||
|
||||
group("Stats");
|
||||
|
||||
for (var name in modes) {
|
||||
var stats = modes[name].stats;
|
||||
outputStats(name + " parser", stats);
|
||||
for (var key in stats) total[key] += stats[key];
|
||||
}
|
||||
|
||||
outputStats("Total", total);
|
||||
|
||||
groupEnd();
|
||||
|
||||
if (total.failed && typeof process === "object") {
|
||||
process.stdout.write("", function() {
|
||||
process.exit(1);
|
||||
});
|
||||
}
|
||||
})();
|
||||
File diff suppressed because one or more lines are too long
File diff suppressed because one or more lines are too long
23623
test/compare/traceur.js
23623
test/compare/traceur.js
File diff suppressed because one or more lines are too long
7
test/driver.js
Normal file → Executable file
7
test/driver.js
Normal file → Executable file
@ -27,13 +27,13 @@
|
||||
try {
|
||||
var ast = parse(test.code, testOpts);
|
||||
} catch(e) {
|
||||
if (!(e instanceof SyntaxError)) throw e;
|
||||
if (!(e instanceof SyntaxError)) { console.log(e.stack); throw e; }
|
||||
if (test.error) {
|
||||
if (e.message == test.error) callback("ok", test.code);
|
||||
else callback("fail", test.code,
|
||||
"Expected error message: " + test.error + "\nGot error message: " + e.message);
|
||||
} else {
|
||||
callback("error", test.code, e.stack || e.toString());
|
||||
callback("error", test.code, e.message || e.toString());
|
||||
}
|
||||
continue
|
||||
}
|
||||
@ -69,7 +69,8 @@
|
||||
|
||||
var misMatch = exports.misMatch = function(exp, act) {
|
||||
if (!exp || !act || (typeof exp != "object") || (typeof act != "object")) {
|
||||
if (exp !== act) return ppJSON(exp) + " !== " + ppJSON(act);
|
||||
if (exp !== act && typeof exp != "function")
|
||||
return ppJSON(exp) + " !== " + ppJSON(act);
|
||||
} else if (exp instanceof RegExp || act instanceof RegExp) {
|
||||
var left = ppJSON(exp), right = ppJSON(act);
|
||||
if (left !== right) return left + " !== " + right;
|
||||
|
||||
@ -2,8 +2,8 @@
|
||||
<head>
|
||||
<meta charset="utf-8">
|
||||
<title>Acorn test suite</title>
|
||||
<script src="../acorn.js"></script>
|
||||
<script src="../acorn_loose.js"></script>
|
||||
<script src="../dist/acorn.js"></script>
|
||||
<script src="../dist/acorn_loose.js"></script>
|
||||
<script src="driver.js"></script>
|
||||
<script src="tests.js" charset="utf-8"></script>
|
||||
<script src="tests-harmony.js" charset="utf-8"></script>
|
||||
|
||||
10316
test/jquery-string.js
vendored
10316
test/jquery-string.js
vendored
File diff suppressed because one or more lines are too long
9
test/run.js
Normal file → Executable file
9
test/run.js
Normal file → Executable file
@ -1,15 +1,18 @@
|
||||
(function() {
|
||||
var driver;
|
||||
var driver, acorn;
|
||||
|
||||
if (typeof require !== "undefined") {
|
||||
driver = require("./driver.js");
|
||||
require("./tests.js");
|
||||
require("./tests-harmony.js");
|
||||
require("./tests-flow.js");
|
||||
require("./tests-babel.js");
|
||||
require("./tests-jsx.js");
|
||||
require("./tests-babel.js");
|
||||
require("babel/register")
|
||||
acorn = require("../src")
|
||||
} else {
|
||||
driver = window;
|
||||
acorn = window.acorn;
|
||||
}
|
||||
|
||||
var htmlLog = typeof document === "object" && document.getElementById('log');
|
||||
@ -50,7 +53,7 @@
|
||||
var stats, modes = {
|
||||
Normal: {
|
||||
config: {
|
||||
parse: (typeof require === "undefined" ? window.acorn : require("../acorn.js")).parse
|
||||
parse: acorn.parse
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
80
test/tests-harmony.js
Normal file → Executable file
80
test/tests-harmony.js
Normal file → Executable file
@ -7463,7 +7463,7 @@ test("\"use strict\"; (class A {constructor() { super() }})", {
|
||||
expression: {
|
||||
type: "CallExpression",
|
||||
callee: {
|
||||
type: "SuperExpression",
|
||||
type: "Super",
|
||||
loc: {
|
||||
start: {line: 1, column: 40},
|
||||
end: {line: 1, column: 45}
|
||||
@ -7794,7 +7794,7 @@ test("\"use strict\"; (class A { static constructor() { super() }})", {
|
||||
expression: {
|
||||
type: "CallExpression",
|
||||
callee: {
|
||||
type: "SuperExpression",
|
||||
type: "Super",
|
||||
loc: {
|
||||
start: {line: 1, column: 48},
|
||||
end: {line: 1, column: 53}
|
||||
@ -13995,7 +13995,7 @@ testFail("x \n isnt y", "Unexpected token (2:6)", {ecmaVersion: 6});
|
||||
|
||||
testFail("function default() {}", "Unexpected token (1:9)", {ecmaVersion: 6});
|
||||
|
||||
testFail("function hello() {'use strict'; ({ i: 10, s(eval) { } }); }", "Defining 'eval' in strict mode (1:44)", {ecmaVersion: 6});
|
||||
testFail("function hello() {'use strict'; ({ i: 10, s(eval) { } }); }", "Binding eval in strict mode (1:44)", {ecmaVersion: 6});
|
||||
|
||||
testFail("function a() { \"use strict\"; ({ b(t, t) { } }); }", "Argument name clash in strict mode (1:37)", {ecmaVersion: 6});
|
||||
|
||||
@ -14027,15 +14027,15 @@ testFail("(a, (b)) => 42", "Unexpected token (1:4)", {ecmaVersion: 6});
|
||||
|
||||
testFail("\"use strict\"; (eval = 10) => 42", "Assigning to eval in strict mode (1:15)", {ecmaVersion: 6});
|
||||
|
||||
testFail("\"use strict\"; eval => 42", "Defining 'eval' in strict mode (1:14)", {ecmaVersion: 6});
|
||||
testFail("\"use strict\"; eval => 42", "Binding eval in strict mode (1:14)", {ecmaVersion: 6});
|
||||
|
||||
testFail("\"use strict\"; arguments => 42", "Defining 'arguments' in strict mode (1:14)", {ecmaVersion: 6});
|
||||
testFail("\"use strict\"; arguments => 42", "Binding arguments in strict mode (1:14)", {ecmaVersion: 6});
|
||||
|
||||
testFail("\"use strict\"; (eval, a) => 42", "Defining 'eval' in strict mode (1:15)", {ecmaVersion: 6});
|
||||
testFail("\"use strict\"; (eval, a) => 42", "Binding eval in strict mode (1:15)", {ecmaVersion: 6});
|
||||
|
||||
testFail("\"use strict\"; (arguments, a) => 42", "Defining 'arguments' in strict mode (1:15)", {ecmaVersion: 6});
|
||||
testFail("\"use strict\"; (arguments, a) => 42", "Binding arguments in strict mode (1:15)", {ecmaVersion: 6});
|
||||
|
||||
testFail("\"use strict\"; (eval, a = 10) => 42", "Defining 'eval' in strict mode (1:15)", {ecmaVersion: 6});
|
||||
testFail("\"use strict\"; (eval, a = 10) => 42", "Binding eval in strict mode (1:15)", {ecmaVersion: 6});
|
||||
|
||||
testFail("\"use strict\"; (a, a) => 42", "Argument name clash in strict mode (1:18)", {ecmaVersion: 6});
|
||||
|
||||
@ -14051,6 +14051,8 @@ testFail("yield v", "Unexpected token (1:6)", {ecmaVersion: 6});
|
||||
|
||||
testFail("yield 10", "Unexpected token (1:6)", {ecmaVersion: 6});
|
||||
|
||||
testFail("void { [1, 2]: 3 };", "Unexpected token (1:9)", {ecmaVersion: 6});
|
||||
|
||||
test("yield* 10", {
|
||||
type: "Program",
|
||||
body: [{
|
||||
@ -14289,7 +14291,7 @@ testFail("[...{ a }] = b", "Unexpected token (1:4)", {ecmaVersion: 6});
|
||||
|
||||
testFail("[...a, b] = c", "Assigning to rvalue (1:1)", {ecmaVersion: 6});
|
||||
|
||||
testFail("({ t(eval) { \"use strict\"; } });", "Defining 'eval' in strict mode (1:5)", {ecmaVersion: 6});
|
||||
testFail("({ t(eval) { \"use strict\"; } });", "Binding eval in strict mode (1:5)", {ecmaVersion: 6});
|
||||
|
||||
testFail("\"use strict\"; `${test}\\02`;", "Octal literal in strict mode (1:22)", {ecmaVersion: 6});
|
||||
|
||||
@ -14358,9 +14360,9 @@ testFail("(b, ...a)", "Unexpected token (1:4)", {ecmaVersion: 6});
|
||||
|
||||
testFail("switch (cond) { case 10: let a = 20; ", "Unexpected token (1:37)", {ecmaVersion: 6});
|
||||
|
||||
testFail("\"use strict\"; (eval) => 42", "Defining 'eval' in strict mode (1:15)", {ecmaVersion: 6});
|
||||
testFail("\"use strict\"; (eval) => 42", "Binding eval in strict mode (1:15)", {ecmaVersion: 6});
|
||||
|
||||
testFail("(eval) => { \"use strict\"; 42 }", "Defining 'eval' in strict mode (1:1)", {ecmaVersion: 6});
|
||||
testFail("(eval) => { \"use strict\"; 42 }", "Binding eval in strict mode (1:1)", {ecmaVersion: 6});
|
||||
|
||||
testFail("({ get test() { } }) => 42", "Object pattern can't contain getter or setter (1:7)", {ecmaVersion: 6});
|
||||
|
||||
@ -15522,6 +15524,47 @@ test("[x,,] = 1", {
|
||||
]
|
||||
}, {ecmaVersion: 6});
|
||||
|
||||
test("for (var [name, value] in obj) {}", {
|
||||
body: [
|
||||
{
|
||||
left: {
|
||||
declarations: [
|
||||
{
|
||||
id: {
|
||||
elements: [
|
||||
{
|
||||
name: "name",
|
||||
type: "Identifier"
|
||||
},
|
||||
{
|
||||
name: "value",
|
||||
type: "Identifier"
|
||||
}
|
||||
],
|
||||
type: "ArrayPattern"
|
||||
},
|
||||
init: null,
|
||||
type: "VariableDeclarator"
|
||||
}
|
||||
],
|
||||
kind: "var",
|
||||
type: "VariableDeclaration"
|
||||
},
|
||||
right: {
|
||||
name: "obj",
|
||||
type: "Identifier"
|
||||
},
|
||||
body: {
|
||||
body: [],
|
||||
type: "BlockStatement"
|
||||
},
|
||||
type: "ForInStatement"
|
||||
}
|
||||
],
|
||||
sourceType: "script",
|
||||
type: "Program"
|
||||
}, {ecmaVersion: 6})
|
||||
|
||||
testFail("let [x]", "Complex binding patterns require an initialization value (1:7)", {ecmaVersion: 6})
|
||||
testFail("var [x]", "Complex binding patterns require an initialization value (1:7)", {ecmaVersion: 6})
|
||||
testFail("var _𖫵 = 11;", "Unexpected character '𖫵' (1:5)", {ecmaVersion: 6});
|
||||
@ -15538,3 +15581,18 @@ testFail("'use strict'; ({eval = defValue} = obj)", "Assigning to eval in strict
|
||||
testFail("[...eval] = arr", "Assigning to eval in strict mode (1:4)", {ecmaVersion: 6, sourceType: "module"});
|
||||
|
||||
testFail("function* y({yield}) {}", "Binding yield (1:13)", {ecmaVersion: 6});
|
||||
|
||||
test("new.target", {
|
||||
type: "Program",
|
||||
body: [{
|
||||
type: "ExpressionStatement",
|
||||
expression: {
|
||||
type: "MetaProperty",
|
||||
meta: {type: "Identifier", name: "new"},
|
||||
property: {type: "Identifier", name: "target"}
|
||||
}
|
||||
}],
|
||||
sourceType: "script"
|
||||
}, {ecmaVersion: 6});
|
||||
|
||||
testFail("new.prop", "The only valid meta property for new is new.target (1:4)", {ecmaVersion: 6});
|
||||
|
||||
79
test/tests.js
Normal file → Executable file
79
test/tests.js
Normal file → Executable file
@ -27261,55 +27261,55 @@ testFail("function hello() {'use strict'; arguments--; }",
|
||||
"Assigning to arguments in strict mode (1:32)");
|
||||
|
||||
testFail("function hello() {'use strict'; function eval() { } }",
|
||||
"Defining 'eval' in strict mode (1:41)");
|
||||
"Binding eval in strict mode (1:41)");
|
||||
|
||||
testFail("function hello() {'use strict'; function arguments() { } }",
|
||||
"Defining 'arguments' in strict mode (1:41)");
|
||||
"Binding arguments in strict mode (1:41)");
|
||||
|
||||
testFail("function eval() {'use strict'; }",
|
||||
"Defining 'eval' in strict mode (1:9)");
|
||||
"Binding eval in strict mode (1:9)");
|
||||
|
||||
testFail("function arguments() {'use strict'; }",
|
||||
"Defining 'arguments' in strict mode (1:9)");
|
||||
"Binding arguments in strict mode (1:9)");
|
||||
|
||||
testFail("function hello() {'use strict'; (function eval() { }()) }",
|
||||
"Defining 'eval' in strict mode (1:42)");
|
||||
"Binding eval in strict mode (1:42)");
|
||||
|
||||
testFail("function hello() {'use strict'; (function arguments() { }()) }",
|
||||
"Defining 'arguments' in strict mode (1:42)");
|
||||
"Binding arguments in strict mode (1:42)");
|
||||
|
||||
testFail("(function eval() {'use strict'; })()",
|
||||
"Defining 'eval' in strict mode (1:10)");
|
||||
"Binding eval in strict mode (1:10)");
|
||||
|
||||
testFail("(function arguments() {'use strict'; })()",
|
||||
"Defining 'arguments' in strict mode (1:10)");
|
||||
"Binding arguments in strict mode (1:10)");
|
||||
|
||||
testFail("function hello() {'use strict'; ({ s: function eval() { } }); }",
|
||||
"Defining 'eval' in strict mode (1:47)");
|
||||
"Binding eval in strict mode (1:47)");
|
||||
|
||||
testFail("(function package() {'use strict'; })()",
|
||||
"Defining 'package' in strict mode (1:10)");
|
||||
"Binding package in strict mode (1:10)");
|
||||
|
||||
testFail("function hello() {'use strict'; ({ i: 10, set s(eval) { } }); }",
|
||||
"Defining 'eval' in strict mode (1:48)");
|
||||
"Binding eval in strict mode (1:48)");
|
||||
|
||||
testFail("function hello() {'use strict'; ({ set s(eval) { } }); }",
|
||||
"Defining 'eval' in strict mode (1:41)");
|
||||
"Binding eval in strict mode (1:41)");
|
||||
|
||||
testFail("function hello() {'use strict'; ({ s: function s(eval) { } }); }",
|
||||
"Defining 'eval' in strict mode (1:49)");
|
||||
"Binding eval in strict mode (1:49)");
|
||||
|
||||
testFail("function hello(eval) {'use strict';}",
|
||||
"Defining 'eval' in strict mode (1:15)");
|
||||
"Binding eval in strict mode (1:15)");
|
||||
|
||||
testFail("function hello(arguments) {'use strict';}",
|
||||
"Defining 'arguments' in strict mode (1:15)");
|
||||
"Binding arguments in strict mode (1:15)");
|
||||
|
||||
testFail("function hello() { 'use strict'; function inner(eval) {} }",
|
||||
"Defining 'eval' in strict mode (1:48)");
|
||||
"Binding eval in strict mode (1:48)");
|
||||
|
||||
testFail("function hello() { 'use strict'; function inner(arguments) {} }",
|
||||
"Defining 'arguments' in strict mode (1:48)");
|
||||
"Binding arguments in strict mode (1:48)");
|
||||
|
||||
testFail("function hello() { 'use strict'; \"\\1\"; }",
|
||||
"Octal literal in strict mode (1:34)");
|
||||
@ -27348,10 +27348,10 @@ testFail("function hello() { \"use strict\"; var static; }",
|
||||
"The keyword 'static' is reserved (1:37)");
|
||||
|
||||
testFail("function hello(static) { \"use strict\"; }",
|
||||
"Defining 'static' in strict mode (1:15)");
|
||||
"Binding static in strict mode (1:15)");
|
||||
|
||||
testFail("function static() { \"use strict\"; }",
|
||||
"Defining 'static' in strict mode (1:9)");
|
||||
"Binding static in strict mode (1:9)");
|
||||
|
||||
testFail("\"use strict\"; function static() { }",
|
||||
"The keyword 'static' is reserved (1:23)");
|
||||
@ -27360,10 +27360,10 @@ testFail("function a(t, t) { \"use strict\"; }",
|
||||
"Argument name clash in strict mode (1:14)");
|
||||
|
||||
testFail("function a(eval) { \"use strict\"; }",
|
||||
"Defining 'eval' in strict mode (1:11)");
|
||||
"Binding eval in strict mode (1:11)");
|
||||
|
||||
testFail("function a(package) { \"use strict\"; }",
|
||||
"Defining 'package' in strict mode (1:11)");
|
||||
"Binding package in strict mode (1:11)");
|
||||
|
||||
testFail("function a() { \"use strict\"; function b(t, t) { }; }",
|
||||
"Argument name clash in strict mode (1:43)");
|
||||
@ -27375,10 +27375,10 @@ testFail("function a() { \"use strict\"; (function b(t, t) { }); }",
|
||||
"Argument name clash in strict mode (1:44)");
|
||||
|
||||
testFail("(function a(eval) { \"use strict\"; })",
|
||||
"Defining 'eval' in strict mode (1:12)");
|
||||
"Binding eval in strict mode (1:12)");
|
||||
|
||||
testFail("(function a(package) { \"use strict\"; })",
|
||||
"Defining 'package' in strict mode (1:12)");
|
||||
"Binding package in strict mode (1:12)");
|
||||
|
||||
testFail("\"use strict\";function foo(){\"use strict\";}function bar(){var v = 015}",
|
||||
"Invalid number (1:65)");
|
||||
@ -28720,39 +28720,6 @@ testFail("for(x of a);", "Unexpected token (1:6)");
|
||||
|
||||
testFail("for(var x of a);", "Unexpected token (1:10)");
|
||||
|
||||
// Assertion Tests
|
||||
test(function TestComments() {
|
||||
// Bear class
|
||||
function Bear(x,y,z) {
|
||||
this.position = [x||0,y||0,z||0]
|
||||
}
|
||||
|
||||
Bear.prototype.roar = function(message) {
|
||||
return 'RAWWW: ' + message; // Whatever
|
||||
};
|
||||
|
||||
function Cat() {
|
||||
/* 1
|
||||
2
|
||||
3*/
|
||||
}
|
||||
|
||||
Cat.prototype.roar = function(message) {
|
||||
return 'MEOOWW: ' + /*stuff*/ message;
|
||||
};
|
||||
}.toString().replace(/\r\n/g, '\n'), {}, {
|
||||
onComment: [
|
||||
{type: "Line", value: " Bear class"},
|
||||
{type: "Line", value: " Whatever"},
|
||||
{type: "Block", value: [
|
||||
" 1",
|
||||
" 2",
|
||||
" 3"
|
||||
].join('\n')},
|
||||
{type: "Block", value: "stuff"}
|
||||
]
|
||||
});
|
||||
|
||||
test("<!--\n;", {
|
||||
type: "Program",
|
||||
body: [{
|
||||
|
||||
@ -1,47 +0,0 @@
|
||||
// Note: run `npm install unicode-7.0.0` first.
|
||||
|
||||
// Which Unicode version should be used?
|
||||
var version = '7.0.0';
|
||||
|
||||
var start = require('unicode-' + version + '/properties/ID_Start/code-points')
|
||||
.filter(function(ch) { return ch > 127; });
|
||||
var cont = [0x200c, 0x200d].concat(require('unicode-' + version + '/properties/ID_Continue/code-points')
|
||||
.filter(function(ch) { return ch > 127 && start.indexOf(ch) == -1; }));
|
||||
|
||||
function pad(str, width) {
|
||||
while (str.length < width) str = "0" + str;
|
||||
return str;
|
||||
}
|
||||
|
||||
function esc(code) {
|
||||
var hex = code.toString(16);
|
||||
if (hex.length <= 2) return "\\x" + pad(hex, 2);
|
||||
else return "\\u" + pad(hex, 4);
|
||||
}
|
||||
|
||||
function generate(chars) {
|
||||
var astral = [], re = "";
|
||||
for (var i = 0, at = 0x10000; i < chars.length; i++) {
|
||||
var from = chars[i], to = from;
|
||||
while (i < chars.length - 1 && chars[i + 1] == to + 1) {
|
||||
i++;
|
||||
to++;
|
||||
}
|
||||
if (to <= 0xffff) {
|
||||
if (from == to) re += esc(from);
|
||||
else if (from + 1 == to) re += esc(from) + esc(to);
|
||||
else re += esc(from) + "-" + esc(to);
|
||||
} else {
|
||||
astral.push(from - at, to - from);
|
||||
at = to;
|
||||
}
|
||||
}
|
||||
return {nonASCII: re, astral: astral};
|
||||
}
|
||||
|
||||
var startData = generate(start), contData = generate(cont);
|
||||
|
||||
console.log(" var nonASCIIidentifierStartChars = \"" + startData.nonASCII + "\";");
|
||||
console.log(" var nonASCIIidentifierChars = \"" + contData.nonASCII + "\";");
|
||||
console.log(" var astralIdentifierStartCodes = " + JSON.stringify(startData.astral) + ";");
|
||||
console.log(" var astralIdentifierCodes = " + JSON.stringify(contData.astral) + ";");
|
||||
Loading…
x
Reference in New Issue
Block a user