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Loose: arrow functions.

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This commit is contained in:
Ingvar Stepanyan 2014-10-27 02:01:31 +02:00 committed by Marijn Haverbeke
parent ede10a079c
commit 992fc0503d
1 changed files with 22 additions and 5 deletions
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27
acorn_loose.js
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@ -674,8 +674,12 @@
var node = startNode();
next();
return finishNode(node, "ThisExpression");
case tt.name:
return parseIdent();
var start = storeCurrentPos();
var id = parseIdent();
return eat(tt.arrow) ? parseArrowExpression(startNodeAt(start), [id]) : id;
case tt.num: case tt.string: case tt.regexp:
var node = startNode();
node.value = token.value;
@ -695,6 +699,9 @@
next();
var val = parseExpression();
expect(tt.parenR);
if (eat(tt.arrow)) {
return parseArrowExpression(startNodeAt(start), val.expressions || (isDummy(val) ? [] : [val]));
}
if (options.preserveParens) {
var par = startNodeAt(start);
par.expression = val;
@ -880,11 +887,13 @@
return checkLVal(node);
}
function parseFunctionParams(node) {
function parseFunctionParams(node, params) {
var defaults = [], hasDefaults = false;
pushCx();
var params = parseExprList(tt.parenR);
if (!params) {
pushCx();
params = parseExprList(tt.parenR);
}
for (var i = 0; i < params.length; i++) {
var param = params[i], defValue = null;
if (param.type === "AssignmentExpression") {
@ -923,12 +932,20 @@
var node = startNode();
initFunction(node);
parseFunctionParams(node);
node.generator = isGenerator;
node.generator = isGenerator || false;
node.expression = options.ecmaVersion >= 6 && token.type !== tt.braceL;
node.body = node.expression ? parseExpression(true) : parseBlock();
return finishNode(node, "FunctionExpression");
}
function parseArrowExpression(node, params) {
initFunction(node);
parseFunctionParams(node, params);
node.expression = token.type !== tt.braceL;
node.body = node.expression ? parseExpression(true) : parseBlock();
return finishNode(node, "ArrowFunctionExpression");
}
function parseExprList(close, allowEmpty) {
var indent = curIndent, line = curLineStart, elts = [], continuedLine = nextLineStart;
next(); // Opening bracket