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hoist param declaration when performing tco - fixes #1478

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Sebastian McKenzie
2015-05-07 23:14:03 +01:00
parent 11af066956
commit a5cda5caa7
6 changed files with 15 additions and 11 deletions
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6
src/babel/transformation/transformers/es6/tail-call.js
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@@ -181,9 +181,11 @@ class TailCallTransformer {
var declarations = flatten(map(this.vars, function (decl) {
return decl.declarations;
}));
var assignment = reduceRight(declarations, function (expr, decl) {
return t.assignmentExpression("=", decl.id, expr);
}, t.identifier("undefined"));
var statement = t.expressionStatement(assignment);
statement._blockHoist = Infinity;
body.unshift(statement);
@@ -191,7 +193,9 @@ class TailCallTransformer {
var paramDecls = this.paramDecls;
if (paramDecls.length > 0) {
body.unshift(t.variableDeclaration("var", paramDecls));
var paramDecl = t.variableDeclaration("var", paramDecls);
paramDecl._blockHoist = Infinity;
body.unshift(paramDecl);
}
body.unshift(t.expressionStatement(