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add babylon hasFeature util method

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This commit is contained in:
Sebastian McKenzie
2015-09-15 06:15:19 +01:00
parent e1575c468c
commit 5ea5d47d7f
3 changed files with 10 additions and 11 deletions
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16
packages/babylon/src/parser/statement.js
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@@ -96,7 +96,7 @@ pp.parseStatement = function (declaration, topLevel) {
return starttype === tt._import ? this.parseImport(node) : this.parseExport(node);
case tt.name:
if (this.options.features["es7.asyncFunctions"] && this.state.value === "async") {
if (this.hasFeature("asyncFunctions") && this.state.value === "async") {
// peek ahead and see if next token is a function
let state = this.state.clone();
this.next();
@@ -145,7 +145,7 @@ pp.parseDecorators = function (allowExport) {
};
pp.parseDecorator = function () {
if (!this.options.features["es7.decorators"]) {
if (!this.hasFeature("decorators")) {
this.unexpected();
}
let node = this.startNode();
@@ -511,7 +511,7 @@ pp.parseFunction = function (node, isStatement, allowExpressionBody, isAsync, op
pp.parseFunctionParams = function (node) {
this.expect(tt.parenL);
node.params = this.parseBindingList(tt.parenR, false, this.options.features["es7.trailingFunctionCommas"]);
node.params = this.parseBindingList(tt.parenR, false, this.hasFeature("trailingFunctionCommas"));
};
// Parse a class declaration or literal (depending on the
@@ -550,7 +550,7 @@ pp.parseClass = function (node, isStatement, optionalId) {
classBody.body.push(this.parseClassProperty(method));
continue;
}
if (this.options.features["es7.asyncFunctions"] && !this.match(tt.parenL) &&
if (this.hasFeature("asyncFunctions") && !this.match(tt.parenL) &&
!method.computed && method.key.type === "Identifier" && method.key.name === "async") {
isAsync = true;
this.parsePropertyName(method);
@@ -605,7 +605,7 @@ pp.isClassProperty = function () {
pp.parseClassProperty = function (node) {
if (this.match(tt.eq)) {
if (!this.options.features["es7.classProperties"]) this.unexpected();
if (!this.hasFeature("classProperties")) this.unexpected();
this.next();
node.value = this.parseMaybeAssign();
} else {
@@ -644,7 +644,7 @@ pp.parseExport = function (node) {
if (this.match(tt.star)) {
let specifier = this.startNode();
this.next();
if (this.options.features["es7.exportExtensions"] && this.eatContextual("as")) {
if (this.hasFeature("exportExtensions") && this.eatContextual("as")) {
specifier.exported = this.parseIdentifier();
node.specifiers = [this.finishNode(specifier, "ExportNamespaceSpecifier")];
this.parseExportSpecifiersMaybe(node);
@@ -653,7 +653,7 @@ pp.parseExport = function (node) {
this.parseExportFrom(node, true);
return this.finishNode(node, "ExportAllDeclaration");
}
} else if (this.options.features["es7.exportExtensions"] && this.isExportDefaultSpecifier()) {
} else if (this.hasFeature("exportExtensions") && this.isExportDefaultSpecifier()) {
let specifier = this.startNode();
specifier.exported = this.parseIdentifier(true);
node.specifiers = [this.finishNode(specifier, "ExportDefaultSpecifier")];
@@ -735,7 +735,7 @@ pp.parseExportFrom = function (node, expect?) {
};
pp.shouldParseExportDeclaration = function () {
return this.options.features["es7.asyncFunctions"] && this.isContextual("async");
return this.hasFeature("asyncFunctions") && this.isContextual("async");
};
pp.checkExport = function (node) {