tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(9,47): error TS2345: Argument of type 'string' is not assignable to parameter of type 'number'. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(10,33): error TS2345: Argument of type 'boolean' is not assignable to parameter of type 'string'. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(15,33): error TS2345: Argument of type 'boolean' is not assignable to parameter of type 'string'. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(16,1): error TS2346: Supplied parameters do not match any signature of call target. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(19,1): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(20,1): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(21,1): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(24,1): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(25,1): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(26,1): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(29,1): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(30,1): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(31,1): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(36,53): error TS2345: Argument of type 'string' is not assignable to parameter of type 'number'. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(37,12): error TS2346: Supplied parameters do not match any signature of call target. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(40,12): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(41,12): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(42,12): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(43,12): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(46,12): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(47,12): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(48,12): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(49,12): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(55,49): error TS2345: Argument of type 'string' is not assignable to parameter of type 'number'. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(56,12): error TS2346: Supplied parameters do not match any signature of call target. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(59,12): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(60,12): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(61,12): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(62,12): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(63,12): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(66,12): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(67,12): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(68,12): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(69,12): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. tests/cases/conformance/types/union/unionTypeConstructSignatures.ts(70,12): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. ==== tests/cases/conformance/types/union/unionTypeConstructSignatures.ts (35 errors) ==== var numOrDate: number | Date; var strOrBoolean: string | boolean; var strOrNum: string | number; // If each type in U has construct signatures and the sets of construct signatures are identical ignoring return types, // U has the same set of construct signatures, but with return types that are unions of the return types of the respective construct signatures from each type in U. var unionOfDifferentReturnType: { new (a: number): number; } | { new (a: number): Date; }; numOrDate = new unionOfDifferentReturnType(10); strOrBoolean = new unionOfDifferentReturnType("hello"); // error ~~~~~~~ !!! error TS2345: Argument of type 'string' is not assignable to parameter of type 'number'. new unionOfDifferentReturnType1(true); // error in type of parameter ~~~~ !!! error TS2345: Argument of type 'boolean' is not assignable to parameter of type 'string'. var unionOfDifferentReturnType1: { new (a: number): number; new (a: string): string; } | { new (a: number): Date; new (a: string): boolean; }; numOrDate = new unionOfDifferentReturnType1(10); strOrBoolean = new unionOfDifferentReturnType1("hello"); new unionOfDifferentReturnType1(true); // error in type of parameter ~~~~ !!! error TS2345: Argument of type 'boolean' is not assignable to parameter of type 'string'. new unionOfDifferentReturnType1(); // error missing parameter ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ !!! error TS2346: Supplied parameters do not match any signature of call target. var unionOfDifferentParameterTypes: { new (a: number): number; } | { new (a: string): Date; }; new unionOfDifferentParameterTypes(10);// error - no call signatures ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. new unionOfDifferentParameterTypes("hello");// error - no call signatures ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. new unionOfDifferentParameterTypes();// error - no call signatures ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. var unionOfDifferentNumberOfSignatures: { new (a: number): number; } | { new (a: number): Date; new (a: string): boolean; }; new unionOfDifferentNumberOfSignatures(); // error - no call signatures ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. new unionOfDifferentNumberOfSignatures(10); // error - no call signatures ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. new unionOfDifferentNumberOfSignatures("hello"); // error - no call signatures ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. var unionWithDifferentParameterCount: { new (a: string): string; } | { new (a: string, b: number): number; }; new unionWithDifferentParameterCount();// no call signature ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. new unionWithDifferentParameterCount("hello");// no call signature ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. new unionWithDifferentParameterCount("hello", 10);// no call signature ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. var unionWithOptionalParameter1: { new (a: string, b?: number): string; } | { new (a: string, b?: number): number; }; strOrNum = new unionWithOptionalParameter1('hello'); strOrNum = new unionWithOptionalParameter1('hello', 10); strOrNum = new unionWithOptionalParameter1('hello', "hello"); // error in parameter type ~~~~~~~ !!! error TS2345: Argument of type 'string' is not assignable to parameter of type 'number'. strOrNum = new unionWithOptionalParameter1(); // error ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ !!! error TS2346: Supplied parameters do not match any signature of call target. var unionWithOptionalParameter2: { new (a: string, b?: number): string; } | { new (a: string, b: number): number }; strOrNum = new unionWithOptionalParameter2('hello'); // error no call signature ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. strOrNum = new unionWithOptionalParameter2('hello', 10); // error no call signature ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. strOrNum = new unionWithOptionalParameter2('hello', "hello"); // error no call signature ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. strOrNum = new unionWithOptionalParameter2(); // error no call signature ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. var unionWithOptionalParameter3: { new (a: string, b?: number): string; } | { new (a: string): number; }; strOrNum = new unionWithOptionalParameter3('hello'); // error no call signature ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. strOrNum = new unionWithOptionalParameter3('hello', 10); // error no call signature ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. strOrNum = new unionWithOptionalParameter3('hello', "hello"); // error no call signature ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. strOrNum = new unionWithOptionalParameter3(); // error no call signature ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. var unionWithRestParameter1: { new (a: string, ...b: number[]): string; } | { new (a: string, ...b: number[]): number }; strOrNum = new unionWithRestParameter1('hello'); strOrNum = new unionWithRestParameter1('hello', 10); strOrNum = new unionWithRestParameter1('hello', 10, 11); strOrNum = new unionWithRestParameter1('hello', "hello"); // error in parameter type ~~~~~~~ !!! error TS2345: Argument of type 'string' is not assignable to parameter of type 'number'. strOrNum = new unionWithRestParameter1(); // error ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ !!! error TS2346: Supplied parameters do not match any signature of call target. var unionWithRestParameter2: { new (a: string, ...b: number[]): string; } | { new (a: string, b: number): number }; strOrNum = new unionWithRestParameter2('hello'); // error no call signature ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. strOrNum = new unionWithRestParameter2('hello', 10); // error no call signature ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. strOrNum = new unionWithRestParameter2('hello', 10, 11); // error no call signature ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. strOrNum = new unionWithRestParameter2('hello', "hello"); // error no call signature ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. strOrNum = new unionWithRestParameter2(); // error no call signature ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. var unionWithRestParameter3: { new (a: string, ...b: number[]): string; } | { new (a: string): number }; strOrNum = new unionWithRestParameter3('hello'); // error no call signature ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. strOrNum = new unionWithRestParameter3('hello', 10); // error no call signature ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. strOrNum = new unionWithRestParameter3('hello', 10, 11); // error no call signature ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. strOrNum = new unionWithRestParameter3('hello', "hello"); // error no call signature ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature. strOrNum = new unionWithRestParameter3(); // error no call signature ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature.