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remove strict-mode specific optimizations due to unsolvable ambiguities

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This commit is contained in:
Ondrej Kraus 2015-02-25 15:24:45 +01:00
parent c3f4091b6d
commit a808742c19
1 changed files with 4 additions and 15 deletions
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19
src/babel/transformation/transformers/es6/parameters.rest.js
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@ -18,8 +18,7 @@ var memberExpressionVisitor = {
if (t.isMemberExpression(parent)) {
var prop = parent.property;
if (state.strictMode ||
typeof prop.value === "number" ||
if (typeof prop.value === "number" ||
t.isUnaryExpression(prop) ||
t.isBinaryExpression(prop)) {
state.candidates.push({ node, parent });
@ -32,7 +31,7 @@ var memberExpressionVisitor = {
}
};
function optimizeMemberExpression(node, parent, offset, strictMode) {
function optimizeMemberExpression(node, parent, offset) {
var newExpr;
var prop = parent.property;
@ -40,19 +39,10 @@ function optimizeMemberExpression(node, parent, offset, strictMode) {
node.name = "arguments";
prop.value += offset;
prop.raw = String(prop.value);
} else if (t.isUnaryExpression(prop)) {
} else {
node.name = "arguments";
newExpr = t.binaryExpression("+", prop, t.literal(offset));
parent.property = newExpr;
} else if (t.isBinaryExpression(prop)) {
node.name = "arguments";
newExpr = t.binaryExpression("+", prop, t.literal(offset));
parent.property = newExpr;
}
if (strictMode && node.name !== "arguments") {
node.name = "arguments";
parent.property = t.binaryExpression("+", prop, t.literal(offset));
}
}
@ -87,8 +77,7 @@ exports.Function = function (node, parent, scope, file) {
name: rest.name,
outerDeclar: restOuterDeclar,
isOptimizable: true,
candidates: [],
strictMode: file.transformers.useStrict.canRun()
candidates: []
};
scope.traverse(node, memberExpressionVisitor, state);