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=== tests/cases/compiler/promiseIdentity2.ts ===
export interface IPromise<T, V> {
>IPromise : Symbol(IPromise, Decl(promiseIdentity2.ts, 0, 0))
>T : Symbol(T, Decl(promiseIdentity2.ts, 0, 26))
>V : Symbol(V, Decl(promiseIdentity2.ts, 0, 28))
then<U, W>(callback: (x: T) => IPromise<U, W>): IPromise<U, W>;
>then : Symbol(IPromise.then, Decl(promiseIdentity2.ts, 0, 33))
>U : Symbol(U, Decl(promiseIdentity2.ts, 1, 9))
>W : Symbol(W, Decl(promiseIdentity2.ts, 1, 11))
>callback : Symbol(callback, Decl(promiseIdentity2.ts, 1, 15))
>x : Symbol(x, Decl(promiseIdentity2.ts, 1, 26))
>T : Symbol(T, Decl(promiseIdentity2.ts, 0, 26))
>IPromise : Symbol(IPromise, Decl(promiseIdentity2.ts, 0, 0))
>U : Symbol(U, Decl(promiseIdentity2.ts, 1, 9))
>W : Symbol(W, Decl(promiseIdentity2.ts, 1, 11))
>IPromise : Symbol(IPromise, Decl(promiseIdentity2.ts, 0, 0))
>U : Symbol(U, Decl(promiseIdentity2.ts, 1, 9))
>W : Symbol(W, Decl(promiseIdentity2.ts, 1, 11))
}
export interface Promise<T, V> {
>Promise : Symbol(Promise, Decl(promiseIdentity2.ts, 2, 1))
>T : Symbol(T, Decl(promiseIdentity2.ts, 3, 25))
>V : Symbol(V, Decl(promiseIdentity2.ts, 3, 27))
then<U, W>(callback: (x: T) => Promise<T, U>): Promise<T, W>;
>then : Symbol(Promise.then, Decl(promiseIdentity2.ts, 3, 32))
>U : Symbol(U, Decl(promiseIdentity2.ts, 4, 9))
>W : Symbol(W, Decl(promiseIdentity2.ts, 4, 11))
>callback : Symbol(callback, Decl(promiseIdentity2.ts, 4, 15))
>x : Symbol(x, Decl(promiseIdentity2.ts, 4, 26))
>T : Symbol(T, Decl(promiseIdentity2.ts, 3, 25))
>Promise : Symbol(Promise, Decl(promiseIdentity2.ts, 2, 1))
>T : Symbol(T, Decl(promiseIdentity2.ts, 3, 25))
>U : Symbol(U, Decl(promiseIdentity2.ts, 4, 9))
>Promise : Symbol(Promise, Decl(promiseIdentity2.ts, 2, 1))
>T : Symbol(T, Decl(promiseIdentity2.ts, 3, 25))
>W : Symbol(W, Decl(promiseIdentity2.ts, 4, 11))
}
// error because T is string in the first declaration, and T is boolean in the second
// Return type and callback return type are ok because T is any in this particular Promise
var x: IPromise<string, number>;
>x : Symbol(x, Decl(promiseIdentity2.ts, 9, 3), Decl(promiseIdentity2.ts, 10, 3))
>IPromise : Symbol(IPromise, Decl(promiseIdentity2.ts, 0, 0))
var x: Promise<any, string>;
>x : Symbol(x, Decl(promiseIdentity2.ts, 9, 3), Decl(promiseIdentity2.ts, 10, 3))
>Promise : Symbol(Promise, Decl(promiseIdentity2.ts, 2, 1))
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