22 lines
No EOL
1.6 KiB
Text
22 lines
No EOL
1.6 KiB
Text
tests/cases/compiler/optionalFunctionArgAssignability.ts(7,1): error TS2322: Type '<U>(onFulFill?: (value: number) => U, onReject?: (reason: any) => U) => Promise<U>' is not assignable to type '<U>(onFulfill?: (value: string) => U, onReject?: (reason: any) => U) => Promise<U>':
|
|
Types of parameters 'onFulFill' and 'onFulfill' are incompatible:
|
|
Type '(value: number) => any' is not assignable to type '(value: string) => any':
|
|
Types of parameters 'value' and 'value' are incompatible:
|
|
Type 'number' is not assignable to type 'string'.
|
|
|
|
|
|
==== tests/cases/compiler/optionalFunctionArgAssignability.ts (1 errors) ====
|
|
interface Promise<T> {
|
|
then<U>(onFulfill?: (value: T) => U, onReject?: (reason: any) => U): Promise<U>;
|
|
}
|
|
|
|
var a = function then<U>(onFulfill?: (value: string) => U, onReject?: (reason: any) => U): Promise<U> { return null };
|
|
var b = function then<U>(onFulFill?: (value: number) => U, onReject?: (reason: any) => U): Promise<U> { return null };
|
|
a = b; // error because number is not assignable to string
|
|
~
|
|
!!! error TS2322: Type '<U>(onFulFill?: (value: number) => U, onReject?: (reason: any) => U) => Promise<U>' is not assignable to type '<U>(onFulfill?: (value: string) => U, onReject?: (reason: any) => U) => Promise<U>':
|
|
!!! error TS2322: Types of parameters 'onFulFill' and 'onFulfill' are incompatible:
|
|
!!! error TS2322: Type '(value: number) => any' is not assignable to type '(value: string) => any':
|
|
!!! error TS2322: Types of parameters 'value' and 'value' are incompatible:
|
|
!!! error TS2322: Type 'number' is not assignable to type 'string'.
|
|
|