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Loose: added support for holes in arrays (but disallows trailing comma).

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This commit is contained in:
Ingvar Stepanyan 2014-10-26 23:14:06 +02:00 committed by Marijn Haverbeke
parent a14a5c8192
commit eba8a5646c
1 changed files with 7 additions and 3 deletions
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10
acorn_loose.js
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@ -702,7 +702,7 @@
case tt.bracketL:
var node = startNode();
pushCx();
node.elements = parseExprList(tt.bracketR);
node.elements = parseExprList(tt.bracketR, true);
return finishNode(node, "ArrayExpression");
case tt.braceL:
@ -861,11 +861,15 @@
return finishNode(node, isStatement ? "FunctionDeclaration" : "FunctionExpression");
}
function parseExprList(close) {
function parseExprList(close, allowEmpty) {
var indent = curIndent, line = curLineStart, elts = [], continuedLine = nextLineStart;
next(); // Opening bracket
if (curLineStart > continuedLine) continuedLine = curLineStart;
while (!closes(close, indent + (curLineStart <= continuedLine ? 1 : 0), line)) {
if (allowEmpty && eat(tt.comma)) {
elts.push(null);
continue;
}
var elt = parseExpression(true);
if (isDummy(elt)) {
if (closes(close, indent, line)) break;
@ -873,7 +877,7 @@
} else {
elts.push(elt);
}
while (eat(tt.comma)) {}
eat(tt.comma);
}
popCx();
eat(close);