66 lines
1.1 KiB
Plaintext
66 lines
1.1 KiB
Plaintext
=== tests/cases/conformance/controlFlow/controlFlowForInStatement2.ts ===
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const keywordA = 'a';
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>keywordA : "a"
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>'a' : "a"
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const keywordB = 'b';
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>keywordB : "b"
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>'b' : "b"
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type A = { [keywordA]: number };
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>A : A
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>[keywordA] : number
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>keywordA : "a"
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type B = { [keywordB]: string };
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>B : B
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>[keywordB] : string
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>keywordB : "b"
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declare const c: A | B;
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>c : A | B
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if ('a' in c) {
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>'a' in c : boolean
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>'a' : "a"
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>c : A | B
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c; // narrowed to `A`
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>c : A
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}
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if (keywordA in c) {
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>keywordA in c : boolean
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>keywordA : "a"
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>c : A | B
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c; // also narrowed to `A`
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>c : A
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}
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let stringB: string = 'b';
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>stringB : string
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>'b' : "b"
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if ((stringB as 'b') in c) {
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>(stringB as 'b') in c : boolean
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>(stringB as 'b') : "b"
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>stringB as 'b' : "b"
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>stringB : string
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>c : A | B
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c; // narrowed to `B`
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>c : B
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}
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if ((stringB as ('a' | 'b')) in c) {
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>(stringB as ('a' | 'b')) in c : boolean
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>(stringB as ('a' | 'b')) : "a" | "b"
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>stringB as ('a' | 'b') : "a" | "b"
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>stringB : string
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>c : A | B
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c; // not narrowed
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>c : A | B
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}
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