TypeScript/tests/baselines/reference/genericCallWithObjectTypeArgsAndIndexers.types
Anders Hejlsberg 0e905be42b
Index signatures for symbols and template literal strings (#44512)
* Switch index signature storage to 'indexInfos: IndexInfo[]' property

* Accept new baselines

* Remove another usage of IndexKind enum

* Update getIndexedAccessType and resolveMappedTypeMembers

* Accept new baselines

* Update grammar checking for index signatures

* Accept new baselines

* Consider all index signatures in mapped types and union types

* Accept new baselines

* Update getIndexType

* Accept new baselines

* Intersect multiple applicable index signatures

* Use getApplicableIndexInfo instead of hardwired string/number handling

* Update index signature relationship checking

* Report type for which index signature is missing

* Report type for which index signature is missing

* Accept new baselines

* Make 'number' index signatures consistently apply to numeric strings

* Accept new baselines

* Update fourslash test

* Revise index constraint checking

* Accept new baselines

* Update error messages

* Accept new baselines

* Update type inference from index signatures

* Update isKnownProperty

* Update contextual typing based on index signatures

* Accept new baselines

* Support union types in index signature declarations

* Accept new baselines

* Check duplicate index signatures / remove redundant template literals from unions with string

* Accept new baselines

* Include key type in diagnostic / check symbol-named properties

* Accept new baselines

* Minor fix

* Add tests

* Accept new baselines

* Add optimized findApplicableIndexInfoForName

* Accept new baselines

* Another place we don't need to obtain literal type for property name

* Accept new baselines

* Don't create literal types that are going to be discarded

* Individual maps for string, number, bigint, and enum literal types

* Remove ineffective optimizations

* Accept new baselines

* Permit intersections as key types in index signatures

* Index expression in element access is template literal context

* Add tests

* Accept new baselines

* Symbol index signatures from object literals with computed symbol properties

* Accept new baselines

* Add more tests

* Accept new baselines

* Implement Go To Definition for all applicable index signatures

* Add fourslash test

* Accept new API baselines
2021-06-21 11:25:42 -07:00

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=== tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithObjectTypeArgsAndIndexers.ts ===
// Type inference infers from indexers in target type, no errors expected
function foo<T>(x: T) {
>foo : <T>(x: T) => T
>x : T
return x;
>x : T
}
var a: {
>a : { [x: string]: Object; [x: number]: Date; }
[x: string]: Object;
>x : string
[x: number]: Date;
>x : number
};
var r = foo(a);
>r : { [x: string]: Object; [x: number]: Date; }
>foo(a) : { [x: string]: Object; [x: number]: Date; }
>foo : <T>(x: T) => T
>a : { [x: string]: Object; [x: number]: Date; }
function other<T extends Date>(arg: T) {
>other : <T extends Date>(arg: T) => void
>arg : T
var b: {
>b : { [x: string]: Object; [x: number]: T; }
[x: string]: Object;
>x : string
[x: number]: T
>x : number
};
var r2 = foo(b);
>r2 : { [x: string]: Object; [x: number]: T; }
>foo(b) : { [x: string]: Object; [x: number]: T; }
>foo : <T>(x: T) => T
>b : { [x: string]: Object; [x: number]: T; }
var d = r2[1];
>d : T
>r2[1] : T
>r2 : { [x: string]: Object; [x: number]: T; }
>1 : 1
var e = r2['1'];
>e : T
>r2['1'] : T
>r2 : { [x: string]: Object; [x: number]: T; }
>'1' : "1"
}