tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithOverloadedConstructorTypedArguments.ts(36,14): error TS2453: The type argument for type parameter 'T' cannot be inferred from the usage. Consider specifying the type arguments explicitly. Type argument candidate 'boolean' is not a valid type argument because it is not a supertype of candidate 'number'. ==== tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithOverloadedConstructorTypedArguments.ts (1 errors) ==== // Function typed arguments with multiple signatures must be passed an implementation that matches all of them // Inferences are made quadratic-pairwise to and from these overload sets module NonGenericParameter { var a: { new(x: boolean): boolean; new(x: string): string; } function foo4(cb: typeof a) { return new cb(null); } var r = foo4(a); var b: { new (x: T): T }; var r2 = foo4(b); } module GenericParameter { function foo5(cb: { new(x: T): string; new(x: number): T }) { return cb; } var a: { new (x: boolean): string; new (x: number): boolean; } var r5 = foo5(a); // new{} => string; new(x:number) => {} var b: { new(x: T): string; new(x: number): T; } var r7 = foo5(b); // new any => string; new(x:number) => any function foo6(cb: { new(x: T): string; new(x: T, y?: T): string }) { return cb; } var r8 = foo6(a); // error ~~~~ !!! error TS2453: The type argument for type parameter 'T' cannot be inferred from the usage. Consider specifying the type arguments explicitly. !!! error TS2453: Type argument candidate 'boolean' is not a valid type argument because it is not a supertype of candidate 'number'. var r9 = foo6(b); // new any => string; new(x:any, y?:any) => string function foo7(x:T, cb: { new(x: T): string; new(x: T, y?: T): string }) { return cb; } var r13 = foo7(1, b); // new any => string; new(x:any, y?:any) => string var c: { new (x: T): string; (x: number): T; } var c2: { new (x: T): string; new(x: number): T; } var r14 = foo7(1, c); // new any => string; new(x:any, y?:any) => string var r15 = foo7(1, c2); // new any => string; new(x:any, y?:any) => string }