57 lines
1.7 KiB
Plaintext
57 lines
1.7 KiB
Plaintext
==== tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations2.ts (7 errors) ====
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// String indexer providing a constraint of a user defined type
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class A {
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foo(): string { return ''; }
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}
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class B extends A {
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bar(): string { return ''; }
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}
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class Foo {
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[x: string]: A;
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a: A; // ok
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b: B; // ok
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c: number; // error
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~~~~~~~~~~
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!!! Property 'c' of type 'number' is not assignable to string index type 'A'.
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d: string; // error
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~~~~~~~~~~
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!!! Property 'd' of type 'string' is not assignable to string index type 'A'.
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}
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interface Foo2 {
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[x: string]: A;
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a: A; // ok
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b: B; // ok
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c: number; // error
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~~~~~~~~~~
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!!! Property 'c' of type 'number' is not assignable to string index type 'A'.
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d: string; // error
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~~~~~~~~~~
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!!! Property 'd' of type 'string' is not assignable to string index type 'A'.
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}
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var a: {
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[x: string]: A;
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a: A; // ok
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b: B; // ok
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c: number; // error
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~~~~~~~~~~
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!!! Property 'c' of type 'number' is not assignable to string index type 'A'.
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d: string; // error
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~~~~~~~~~~
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!!! Property 'd' of type 'string' is not assignable to string index type 'A'.
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};
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// error
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var b: { [x: string]: A } = {
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~
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!!! Type '{ [x: string]: typeof A; a: typeof A; b: typeof B; }' is not assignable to type '{ [x: string]: A; }':
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!!! Index signatures are incompatible:
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!!! Type 'typeof A' is not assignable to type 'A':
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!!! Property 'foo' is missing in type 'typeof A'.
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a: A,
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b: B
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} |