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Symbol-named properties do not need to align with string indexer type #21217

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Merged
rbuckton merged 1 commit into from
Jan 17, 2018
Merged

Symbol-named properties do not need to align with string indexer type #21217

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3 changes: 2 additions & 1 deletion src/compiler/checker.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -22298,7 +22298,8 @@ namespace ts {
indexType: Type,
indexKind: IndexKind): void {

if (!indexType) {
// ESSymbol properties apply to neither string nor numeric indexers.
if (!indexType || isKnownSymbol(prop)) {
return;
}

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25 changes: 25 additions & 0 deletions tests/baselines/reference/symbolProperty60.js
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@@ -0,0 +1,25 @@
//// [symbolProperty60.ts]
// https://github.com/Microsoft/TypeScript/issues/20146
interface I1 {
[Symbol.toStringTag]: string;
[key: string]: number;
}

interface I2 {
[Symbol.toStringTag]: string;
[key: number]: boolean;
}

declare const mySymbol: unique symbol;

interface I3 {
[mySymbol]: string;
[key: string]: number;
}

interface I4 {
[mySymbol]: string;
[key: number]: boolean;
}

//// [symbolProperty60.js]
48 changes: 48 additions & 0 deletions tests/baselines/reference/symbolProperty60.symbols
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@@ -0,0 +1,48 @@
=== tests/cases/conformance/es6/Symbols/symbolProperty60.ts ===
// https://github.com/Microsoft/TypeScript/issues/20146
interface I1 {
>I1 : Symbol(I1, Decl(symbolProperty60.ts, 0, 0))

[Symbol.toStringTag]: string;
>Symbol.toStringTag : Symbol(SymbolConstructor.toStringTag, Decl(lib.es2015.symbol.wellknown.d.ts, --, --))
>Symbol : Symbol(Symbol, Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2015.symbol.d.ts, --, --), Decl(lib.es2015.symbol.d.ts, --, --))
>toStringTag : Symbol(SymbolConstructor.toStringTag, Decl(lib.es2015.symbol.wellknown.d.ts, --, --))

[key: string]: number;
>key : Symbol(key, Decl(symbolProperty60.ts, 3, 5))
}

interface I2 {
>I2 : Symbol(I2, Decl(symbolProperty60.ts, 4, 1))

[Symbol.toStringTag]: string;
>Symbol.toStringTag : Symbol(SymbolConstructor.toStringTag, Decl(lib.es2015.symbol.wellknown.d.ts, --, --))
>Symbol : Symbol(Symbol, Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2015.symbol.d.ts, --, --), Decl(lib.es2015.symbol.d.ts, --, --))
>toStringTag : Symbol(SymbolConstructor.toStringTag, Decl(lib.es2015.symbol.wellknown.d.ts, --, --))

[key: number]: boolean;
>key : Symbol(key, Decl(symbolProperty60.ts, 8, 5))
}

declare const mySymbol: unique symbol;
>mySymbol : Symbol(mySymbol, Decl(symbolProperty60.ts, 11, 13))

interface I3 {
>I3 : Symbol(I3, Decl(symbolProperty60.ts, 11, 38))

[mySymbol]: string;
>mySymbol : Symbol(mySymbol, Decl(symbolProperty60.ts, 11, 13))

[key: string]: number;
>key : Symbol(key, Decl(symbolProperty60.ts, 15, 5))
}

interface I4 {
>I4 : Symbol(I4, Decl(symbolProperty60.ts, 16, 1))

[mySymbol]: string;
>mySymbol : Symbol(mySymbol, Decl(symbolProperty60.ts, 11, 13))

[key: number]: boolean;
>key : Symbol(key, Decl(symbolProperty60.ts, 20, 5))
}
48 changes: 48 additions & 0 deletions tests/baselines/reference/symbolProperty60.types
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=== tests/cases/conformance/es6/Symbols/symbolProperty60.ts ===
// https://github.com/Microsoft/TypeScript/issues/20146
interface I1 {
>I1 : I1

[Symbol.toStringTag]: string;
>Symbol.toStringTag : symbol
>Symbol : SymbolConstructor
>toStringTag : symbol

[key: string]: number;
>key : string
}

interface I2 {
>I2 : I2

[Symbol.toStringTag]: string;
>Symbol.toStringTag : symbol
>Symbol : SymbolConstructor
>toStringTag : symbol

[key: number]: boolean;
>key : number
}

declare const mySymbol: unique symbol;
>mySymbol : unique symbol

interface I3 {
>I3 : I3

[mySymbol]: string;
>mySymbol : unique symbol

[key: string]: number;
>key : string
}

interface I4 {
>I4 : I4

[mySymbol]: string;
>mySymbol : unique symbol

[key: number]: boolean;
>key : number
}
23 changes: 23 additions & 0 deletions tests/cases/conformance/es6/Symbols/symbolProperty60.ts
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@@ -0,0 +1,23 @@
// @target: es2015
// https://github.com/Microsoft/TypeScript/issues/20146
interface I1 {
[Symbol.toStringTag]: string;
[key: string]: number;
}

interface I2 {
[Symbol.toStringTag]: string;
[key: number]: boolean;
}

declare const mySymbol: unique symbol;

interface I3 {
[mySymbol]: string;
[key: string]: number;
}

interface I4 {
[mySymbol]: string;
[key: number]: boolean;
}