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Add super to control flow.

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It is handled the same way as 'this'
This commit is contained in:
Nathan Shively-Sanders 2017-03-31 14:17:37 -07:00
parent 0459987673
commit a4a7669a4b
2 changed files with 4 additions and 0 deletions
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1
src/compiler/binder.ts
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@ -703,6 +703,7 @@ namespace ts {
function isNarrowableReference(expr: Expression): boolean {
return expr.kind === SyntaxKind.Identifier ||
expr.kind === SyntaxKind.ThisKeyword ||
expr.kind === SyntaxKind.SuperKeyword ||
expr.kind === SyntaxKind.PropertyAccessExpression && isNarrowableReference((<PropertyAccessExpression>expr).expression);
}

3
src/compiler/checker.ts
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@ -10347,6 +10347,8 @@ namespace ts {
getExportSymbolOfValueSymbolIfExported(getResolvedSymbol(<Identifier>source)) === getSymbolOfNode(target);
case SyntaxKind.ThisKeyword:
return target.kind === SyntaxKind.ThisKeyword;
case SyntaxKind.SuperKeyword:
return target.kind === SyntaxKind.SuperKeyword;
case SyntaxKind.PropertyAccessExpression:
return target.kind === SyntaxKind.PropertyAccessExpression &&
(<PropertyAccessExpression>source).name.text === (<PropertyAccessExpression>target).name.text &&
@ -11483,6 +11485,7 @@ namespace ts {
switch (expr.kind) {
case SyntaxKind.Identifier:
case SyntaxKind.ThisKeyword:
case SyntaxKind.SuperKeyword:
case SyntaxKind.PropertyAccessExpression:
return narrowTypeByTruthiness(type, expr, assumeTrue);
case SyntaxKind.CallExpression: