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Fix lookahead to not add comments to arrays which are not cloned (#76)

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We do not clone arrays in lookahead() but comments were added
to leading/trailing arrays during lookahead, leading to leak to the next next() call.

Also extracted parsing of JSXSpreadChild to own parse function.
This commit is contained in:
Daniel Tschinder
2016-07-17 11:08:25 +02:00
committed by GitHub
parent 97325592fa
commit 88d7e2012c
2 changed files with 17 additions and 10 deletions
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24
src/plugins/jsx/index.js
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@@ -265,6 +265,18 @@ pp.jsxParseEmptyExpression = function() {
return this.finishNodeAt(node, "JSXEmptyExpression", this.start, this.startLoc);
};
// Parse JSX spread child
pp.jsxParseSpreadChild = function() {
let node = this.startNode();
this.expect(tt.braceL);
this.expect(tt.ellipsis);
node.expression = this.parseExpression();
this.expect(tt.braceR);
return this.finishNode(node, "JSXSpreadChild");
};
// Parses JSX expression enclosed into curly brackets.
@@ -346,15 +358,11 @@ pp.jsxParseElementAt = function(startPos, startLoc) {
case tt.braceL:
if (this.lookahead().type === tt.ellipsis) {
let node = this.startNode();
this.next();
this.next();
node.expression = this.parseExpression();
this.expect(tt.braceR);
children.push(this.finishNode(node, "JSXSpreadChild"));
break;
children.push(this.jsxParseSpreadChild());
} else {
children.push(this.jsxParseExpressionContainer());
}
children.push(this.jsxParseExpressionContainer());
break;
default: