37 lines
1 KiB
Plaintext
37 lines
1 KiB
Plaintext
==== tests/cases/compiler/inheritedStringIndexersFromDifferentBaseTypes.ts (2 errors) ====
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// string indexer tests
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interface A {
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[s: string]: number;
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}
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interface B {
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[s: string]: number;
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}
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interface C extends A, B { } // ok
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interface D {
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[s: string]: string;
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}
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interface E extends A, D { } // error
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~
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!!! Interface 'E' incorrectly extends interface 'D':
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!!! Index signatures are incompatible:
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!!! Type 'number' is not assignable to type 'string'.
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// Same tests for number indexer
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interface A2 {
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[s: number]: number;
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}
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interface B2 {
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[s: number]: number;
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}
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interface C2 extends A2, B2 { } // ok
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interface D2 {
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[s: number]: string;
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}
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interface E2 extends A2, D2 { } // error
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~~
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!!! Interface 'E2' incorrectly extends interface 'D2':
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!!! Index signatures are incompatible:
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!!! Type 'number' is not assignable to type 'string'. |