0e905be42b
* 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
48 lines
1.7 KiB
Plaintext
48 lines
1.7 KiB
Plaintext
tests/cases/compiler/derivedTypeIncompatibleSignatures.ts(21,11): error TS2430: Interface 'F' incorrectly extends interface 'E'.
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'string' index signatures are incompatible.
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Type 'number' is not assignable to type 'string'.
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tests/cases/compiler/derivedTypeIncompatibleSignatures.ts(29,11): error TS2430: Interface 'H' incorrectly extends interface 'G'.
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'number' index signatures are incompatible.
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Type 'number' is not assignable to type 'string'.
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==== tests/cases/compiler/derivedTypeIncompatibleSignatures.ts (2 errors) ====
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interface A {
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(a: string): string;
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}
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interface B extends A {
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(a: string): number; // Number is not a subtype of string. Should error.
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}
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interface C {
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new (a: string): string;
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}
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interface D extends C {
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new (a: string): number; // Number is not a subtype of string. Should error.
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}
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interface E {
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[a: string]: string;
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}
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interface F extends E {
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~
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!!! error TS2430: Interface 'F' incorrectly extends interface 'E'.
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!!! error TS2430: 'string' index signatures are incompatible.
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!!! error TS2430: Type 'number' is not assignable to type 'string'.
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[a: string]: number; // Number is not a subtype of string. Should error.
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}
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interface G {
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[a: number]: string;
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}
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interface H extends G {
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~
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!!! error TS2430: Interface 'H' incorrectly extends interface 'G'.
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!!! error TS2430: 'number' index signatures are incompatible.
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!!! error TS2430: Type 'number' is not assignable to type 'string'.
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[a: number]: number; // Should error for the same reason
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} |