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ignore this and arguments when performing TCO on shadowed functions - fixes #1564

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Sebastian McKenzie
2015-05-18 22:41:27 +01:00
parent 9be3d9c8e1
commit b4cd2df745
3 changed files with 29 additions and 5 deletions
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13
src/babel/transformation/transformers/es6/tail-call.js
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@@ -44,12 +44,14 @@ var visitor = {
},
ThisExpression(node, parent, scope, state) {
state.needsThis = true;
state.thisPaths.push(this);
if (!state.isShadowed) {
state.needsThis = true;
state.thisPaths.push(this);
}
},
ReferencedIdentifier(node, parent, scope, state) {
if (node.name === "arguments") {
if (node.name === "arguments" && !state.isShadowed) {
state.needsArguments = true;
state.argumentsPaths.push(this);
}
@@ -67,8 +69,9 @@ class TailCallTransformer {
this.needsThis = false;
this.thisPaths = [];
this.ownerId = path.node.id;
this.vars = [];
this.isShadowed = path.isArrowFunctionExpression() || path.is("shadow");
this.ownerId = path.node.id;
this.vars = [];
this.scope = scope;
this.path = path;