c5db1614f6
Type inference now supports inferring from string index signatures to numeric index signatures. Fixes #167.
31 lines
804 B
JavaScript
31 lines
804 B
JavaScript
//// [indexSignatureTypeInference.ts]
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interface NumberMap<T> {
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[index: number]: T;
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}
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interface StringMap<T> {
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[index: string]: T;
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}
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declare function numberMapToArray<T>(object: NumberMap<T>): T[];
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declare function stringMapToArray<T>(object: StringMap<T>): T[];
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var numberMap: NumberMap<Function>;
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var stringMap: StringMap<Function>;
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var v1: Function[];
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var v1 = numberMapToArray(numberMap); // Ok
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var v1 = numberMapToArray(stringMap); // Ok
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var v1 = stringMapToArray(numberMap); // Error expected here
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var v1 = stringMapToArray(stringMap); // Ok
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//// [indexSignatureTypeInference.js]
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var numberMap;
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var stringMap;
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var v1;
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var v1 = numberMapToArray(numberMap);
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var v1 = numberMapToArray(stringMap);
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var v1 = stringMapToArray(numberMap);
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var v1 = stringMapToArray(stringMap);
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