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tests/cases/conformance/types/typeRelationships/typeInference/indexSignatureTypeInference.ts(18,27): error TS2345: Argument of type 'NumberMap<Function>' is not assignable to parameter of type 'StringMap<{}>'.
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Index signature is missing in type 'NumberMap<Function>'.
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==== tests/cases/conformance/types/typeRelationships/typeInference/indexSignatureTypeInference.ts (1 errors) ====
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interface NumberMap<T> {
[index: number]: T;
}
interface StringMap<T> {
[index: string]: T;
}
declare function numberMapToArray<T>(object: NumberMap<T>): T[];
declare function stringMapToArray<T>(object: StringMap<T>): T[];
var numberMap: NumberMap<Function>;
var stringMap: StringMap<Function>;
var v1: Function[];
var v1 = numberMapToArray(numberMap); // Ok
var v1 = numberMapToArray(stringMap); // Ok
var v1 = stringMapToArray(numberMap); // Error expected here
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~~~~~~~~~
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!!! error TS2345: Argument of type 'NumberMap<Function>' is not assignable to parameter of type 'StringMap<{}>'.
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!!! error TS2345: Index signature is missing in type 'NumberMap<Function>'.
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var v1 = stringMapToArray(stringMap); // Ok