1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
|
tests/cases/compiler/promiseIdentityWithAny2.ts(10,5): error TS2403: Subsequent variable declarations must have the same type. Variable 'x' must be of type 'IPromise<string, number>', but here has type 'Promise<string, boolean>'.
tests/cases/compiler/promiseIdentityWithAny2.ts(22,5): error TS2403: Subsequent variable declarations must have the same type. Variable 'y' must be of type 'IPromise2<string, number>', but here has type 'Promise2<string, boolean>'.
==== tests/cases/compiler/promiseIdentityWithAny2.ts (2 errors) ====
interface IPromise<T, V> {
then<U, W>(callback: (x: T) => IPromise<U, W>): IPromise<U, W>;
}
interface Promise<T, V> {
then(callback: (x: T) => Promise<any, any>): Promise<any, any>;
}
// Error because type parameter arity doesn't match
var x: IPromise<string, number>;
var x: Promise<string, boolean>;
~
!!! error TS2403: Subsequent variable declarations must have the same type. Variable 'x' must be of type 'IPromise<string, number>', but here has type 'Promise<string, boolean>'.
interface IPromise2<T, V> {
then<U, W>(callback: (x: T) => IPromise2<U, W>): IPromise2<U, W>;
}
interface Promise2<T, V> {
then<U, W>(callback: (x: T) => Promise2<string, any>): Promise2<any, any>; // Uses string instead of any!
}
// Error because string and any don't match
var y: IPromise2<string, number>;
var y: Promise2<string, boolean>;
~
!!! error TS2403: Subsequent variable declarations must have the same type. Variable 'y' must be of type 'IPromise2<string, number>', but here has type 'Promise2<string, boolean>'.
|
