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Loose: for-of statement.

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Ingvar Stepanyan 2014-10-27 02:05:38 +02:00 committed by Marijn Haverbeke
parent 992fc0503d
commit bdce88c184
1 changed files with 11 additions and 6 deletions
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17
acorn_loose.js
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@ -338,12 +338,17 @@
if (token.type === tt.semi) return parseFor(node, null);
if (token.type === tt._var || token.type === tt._let) {
var init = parseVar(true);
if (init.declarations.length === 1 && eat(tt._in))
return parseForIn(node, init);
if (init.declarations.length === 1) {
if (eat(tt._in)) return parseForIn(node, init);
if (token.type === tt.name && token.value === "of") {
next();
return parseForIn(node, init, true);
}
}
return parseFor(node, init);
}
var init = parseExpression(false, true);
if (eat(tt._in)) {return parseForIn(node, checkLVal(init));}
if (eat(tt._in)) return parseForIn(node, checkLVal(init));
return parseFor(node, init);
case tt._function:
@ -488,13 +493,13 @@
return finishNode(node, "ForStatement");
}
function parseForIn(node, init) {
function parseForIn(node, init, isOf) {
node.left = init;
node.right = parseExpression();
popCx();
expect(tt.parenR);
node.body = parseStatement();
return finishNode(node, "ForInStatement");
return finishNode(node, isOf ? "ForOfStatement" : "ForInStatement");
}
function parseVar(noIn) {
@ -680,7 +685,7 @@
var id = parseIdent();
return eat(tt.arrow) ? parseArrowExpression(startNodeAt(start), [id]) : id;
case tt.num: case tt.string: case tt.regexp:
case tt.num: case tt.string: case tt.regexp:
var node = startNode();
node.value = token.value;
node.raw = input.slice(token.start, token.end);