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Merge pull request #16279 from Microsoft/fix15928

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Fix for..await emit for es2017
This commit is contained in:
Ron Buckton
2017-06-05 18:03:09 -07:00
committed by GitHub
parent c179d9a22d a05a53b2a2
commit d9ec08ceaf
5 changed files with 276 additions and 5 deletions
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12
src/compiler/transformers/esnext.ts
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@@ -351,8 +351,10 @@ namespace ts {
);
}
function awaitAsYield(expression: Expression) {
return createYield(/*asteriskToken*/ undefined, enclosingFunctionFlags & FunctionFlags.Generator ? createAwaitHelper(context, expression) : expression);
function createDownlevelAwait(expression: Expression) {
return enclosingFunctionFlags & FunctionFlags.Generator
? createYield(/*asteriskToken*/ undefined, createAwaitHelper(context, expression))
: createAwait(expression);
}
function transformForAwaitOfStatement(node: ForOfStatement, outermostLabeledStatement: LabeledStatement) {
@@ -385,11 +387,11 @@ namespace ts {
EmitFlags.NoHoisting
),
/*condition*/ createComma(
createAssignment(result, awaitAsYield(callNext)),
createAssignment(result, createDownlevelAwait(callNext)),
createLogicalNot(getDone)
),
/*incrementor*/ undefined,
/*statement*/ convertForOfStatementHead(node, awaitAsYield(getValue))
/*statement*/ convertForOfStatementHead(node, createDownlevelAwait(getValue))
),
/*location*/ node
),
@@ -434,7 +436,7 @@ namespace ts {
createPropertyAccess(iterator, "return")
)
),
createStatement(awaitAsYield(callReturn))
createStatement(createDownlevelAwait(callReturn))
),
EmitFlags.SingleLine
)