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create new lexical environment for the body of converted loop (#12831)

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This commit is contained in:
Vladimir Matveev
2016-12-12 10:18:30 -08:00
committed by GitHub
parent a604d84f5c
commit 496a14a021
6 changed files with 128 additions and 3 deletions
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9
src/compiler/transformers/es2015.ts
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@@ -2286,14 +2286,19 @@ namespace ts {
}
}
startLexicalEnvironment();
let loopBody = visitNode(node.statement, visitor, isStatement);
const lexicalEnvironment = endLexicalEnvironment();
const currentState = convertedLoopState;
convertedLoopState = outerConvertedLoopState;
if (loopOutParameters.length) {
if (loopOutParameters.length || lexicalEnvironment) {
const statements = isBlock(loopBody) ? (<Block>loopBody).statements.slice() : [loopBody];
copyOutParameters(loopOutParameters, CopyDirection.ToOutParameter, statements);
if (loopOutParameters.length) {
copyOutParameters(loopOutParameters, CopyDirection.ToOutParameter, statements);
}
addRange(statements, lexicalEnvironment)
loopBody = createBlock(statements, /*location*/ undefined, /*multiline*/ true);
}