=== tests/cases/compiler/ipromise4.ts ===
declare module Windows.Foundation {
>Windows : Symbol(Windows, Decl(ipromise4.ts, 0, 0))
>Foundation : Symbol(Foundation, Decl(ipromise4.ts, 0, 23))

    export interface IPromise<T> {
>IPromise : Symbol(IPromise, Decl(ipromise4.ts, 0, 35))
>T : Symbol(T, Decl(ipromise4.ts, 1, 30))

        then<U>(success?: (value: T) => IPromise<U>, error?: (error: any) => IPromise<U>, progress?: (progress: any) => void ): Windows.Foundation.IPromise<U>;
>then : Symbol(then, Decl(ipromise4.ts, 1, 34), Decl(ipromise4.ts, 2, 159), Decl(ipromise4.ts, 3, 149), Decl(ipromise4.ts, 4, 149))
>U : Symbol(U, Decl(ipromise4.ts, 2, 13))
>success : Symbol(success, Decl(ipromise4.ts, 2, 16))
>value : Symbol(value, Decl(ipromise4.ts, 2, 27))
>T : Symbol(T, Decl(ipromise4.ts, 1, 30))
>IPromise : Symbol(IPromise, Decl(ipromise4.ts, 0, 35))
>U : Symbol(U, Decl(ipromise4.ts, 2, 13))
>error : Symbol(error, Decl(ipromise4.ts, 2, 52))
>error : Symbol(error, Decl(ipromise4.ts, 2, 62))
>IPromise : Symbol(IPromise, Decl(ipromise4.ts, 0, 35))
>U : Symbol(U, Decl(ipromise4.ts, 2, 13))
>progress : Symbol(progress, Decl(ipromise4.ts, 2, 89))
>progress : Symbol(progress, Decl(ipromise4.ts, 2, 102))
>Windows : Symbol(Windows, Decl(ipromise4.ts, 0, 0))
>Foundation : Symbol(Foundation, Decl(ipromise4.ts, 0, 23))
>IPromise : Symbol(IPromise, Decl(ipromise4.ts, 0, 35))
>U : Symbol(U, Decl(ipromise4.ts, 2, 13))

        then<U>(success?: (value: T) => IPromise<U>, error?: (error: any) => U, progress?: (progress: any) => void ): Windows.Foundation.IPromise<U>;
>then : Symbol(then, Decl(ipromise4.ts, 1, 34), Decl(ipromise4.ts, 2, 159), Decl(ipromise4.ts, 3, 149), Decl(ipromise4.ts, 4, 149))
>U : Symbol(U, Decl(ipromise4.ts, 3, 13))
>success : Symbol(success, Decl(ipromise4.ts, 3, 16))
>value : Symbol(value, Decl(ipromise4.ts, 3, 27))
>T : Symbol(T, Decl(ipromise4.ts, 1, 30))
>IPromise : Symbol(IPromise, Decl(ipromise4.ts, 0, 35))
>U : Symbol(U, Decl(ipromise4.ts, 3, 13))
>error : Symbol(error, Decl(ipromise4.ts, 3, 52))
>error : Symbol(error, Decl(ipromise4.ts, 3, 62))
>U : Symbol(U, Decl(ipromise4.ts, 3, 13))
>progress : Symbol(progress, Decl(ipromise4.ts, 3, 79))
>progress : Symbol(progress, Decl(ipromise4.ts, 3, 92))
>Windows : Symbol(Windows, Decl(ipromise4.ts, 0, 0))
>Foundation : Symbol(Foundation, Decl(ipromise4.ts, 0, 23))
>IPromise : Symbol(IPromise, Decl(ipromise4.ts, 0, 35))
>U : Symbol(U, Decl(ipromise4.ts, 3, 13))

        then<U>(success?: (value: T) => U, error?: (error: any) => IPromise<U>, progress?: (progress: any) => void ): Windows.Foundation.IPromise<U>;
>then : Symbol(then, Decl(ipromise4.ts, 1, 34), Decl(ipromise4.ts, 2, 159), Decl(ipromise4.ts, 3, 149), Decl(ipromise4.ts, 4, 149))
>U : Symbol(U, Decl(ipromise4.ts, 4, 13))
>success : Symbol(success, Decl(ipromise4.ts, 4, 16))
>value : Symbol(value, Decl(ipromise4.ts, 4, 27))
>T : Symbol(T, Decl(ipromise4.ts, 1, 30))
>U : Symbol(U, Decl(ipromise4.ts, 4, 13))
>error : Symbol(error, Decl(ipromise4.ts, 4, 42))
>error : Symbol(error, Decl(ipromise4.ts, 4, 52))
>IPromise : Symbol(IPromise, Decl(ipromise4.ts, 0, 35))
>U : Symbol(U, Decl(ipromise4.ts, 4, 13))
>progress : Symbol(progress, Decl(ipromise4.ts, 4, 79))
>progress : Symbol(progress, Decl(ipromise4.ts, 4, 92))
>Windows : Symbol(Windows, Decl(ipromise4.ts, 0, 0))
>Foundation : Symbol(Foundation, Decl(ipromise4.ts, 0, 23))
>IPromise : Symbol(IPromise, Decl(ipromise4.ts, 0, 35))
>U : Symbol(U, Decl(ipromise4.ts, 4, 13))

        then<U>(success?: (value: T) => U, error?: (error: any) => U, progress?: (progress: any) => void ): Windows.Foundation.IPromise<U>;
>then : Symbol(then, Decl(ipromise4.ts, 1, 34), Decl(ipromise4.ts, 2, 159), Decl(ipromise4.ts, 3, 149), Decl(ipromise4.ts, 4, 149))
>U : Symbol(U, Decl(ipromise4.ts, 5, 13))
>success : Symbol(success, Decl(ipromise4.ts, 5, 16))
>value : Symbol(value, Decl(ipromise4.ts, 5, 27))
>T : Symbol(T, Decl(ipromise4.ts, 1, 30))
>U : Symbol(U, Decl(ipromise4.ts, 5, 13))
>error : Symbol(error, Decl(ipromise4.ts, 5, 42))
>error : Symbol(error, Decl(ipromise4.ts, 5, 52))
>U : Symbol(U, Decl(ipromise4.ts, 5, 13))
>progress : Symbol(progress, Decl(ipromise4.ts, 5, 69))
>progress : Symbol(progress, Decl(ipromise4.ts, 5, 82))
>Windows : Symbol(Windows, Decl(ipromise4.ts, 0, 0))
>Foundation : Symbol(Foundation, Decl(ipromise4.ts, 0, 23))
>IPromise : Symbol(IPromise, Decl(ipromise4.ts, 0, 35))
>U : Symbol(U, Decl(ipromise4.ts, 5, 13))

        done? <U>(success?: (value: T) => any, error?: (error: any) => any, progress?: (progress: any) => void ): void;
>done : Symbol(done, Decl(ipromise4.ts, 5, 139))
>U : Symbol(U, Decl(ipromise4.ts, 6, 15))
>success : Symbol(success, Decl(ipromise4.ts, 6, 18))
>value : Symbol(value, Decl(ipromise4.ts, 6, 29))
>T : Symbol(T, Decl(ipromise4.ts, 1, 30))
>error : Symbol(error, Decl(ipromise4.ts, 6, 46))
>error : Symbol(error, Decl(ipromise4.ts, 6, 56))
>progress : Symbol(progress, Decl(ipromise4.ts, 6, 75))
>progress : Symbol(progress, Decl(ipromise4.ts, 6, 88))
    }
}
 
var p: Windows.Foundation.IPromise<number> = null;
>p : Symbol(p, Decl(ipromise4.ts, 10, 3))
>Windows : Symbol(Windows, Decl(ipromise4.ts, 0, 0))
>Foundation : Symbol(Windows.Foundation, Decl(ipromise4.ts, 0, 23))
>IPromise : Symbol(Windows.Foundation.IPromise, Decl(ipromise4.ts, 0, 35))
 
p.then(function (x) { } ); // should not error
>p.then : Symbol(Windows.Foundation.IPromise.then, Decl(ipromise4.ts, 1, 34), Decl(ipromise4.ts, 2, 159), Decl(ipromise4.ts, 3, 149), Decl(ipromise4.ts, 4, 149))
>p : Symbol(p, Decl(ipromise4.ts, 10, 3))
>then : Symbol(Windows.Foundation.IPromise.then, Decl(ipromise4.ts, 1, 34), Decl(ipromise4.ts, 2, 159), Decl(ipromise4.ts, 3, 149), Decl(ipromise4.ts, 4, 149))
>x : Symbol(x, Decl(ipromise4.ts, 12, 17))

p.then(function (x) { return "hello"; } ).then(function (x) { return x } ); // should not error
>p.then(function (x) { return "hello"; } ).then : Symbol(Windows.Foundation.IPromise.then, Decl(ipromise4.ts, 1, 34), Decl(ipromise4.ts, 2, 159), Decl(ipromise4.ts, 3, 149), Decl(ipromise4.ts, 4, 149))
>p.then : Symbol(Windows.Foundation.IPromise.then, Decl(ipromise4.ts, 1, 34), Decl(ipromise4.ts, 2, 159), Decl(ipromise4.ts, 3, 149), Decl(ipromise4.ts, 4, 149))
>p : Symbol(p, Decl(ipromise4.ts, 10, 3))
>then : Symbol(Windows.Foundation.IPromise.then, Decl(ipromise4.ts, 1, 34), Decl(ipromise4.ts, 2, 159), Decl(ipromise4.ts, 3, 149), Decl(ipromise4.ts, 4, 149))
>x : Symbol(x, Decl(ipromise4.ts, 13, 17))
>then : Symbol(Windows.Foundation.IPromise.then, Decl(ipromise4.ts, 1, 34), Decl(ipromise4.ts, 2, 159), Decl(ipromise4.ts, 3, 149), Decl(ipromise4.ts, 4, 149))
>x : Symbol(x, Decl(ipromise4.ts, 13, 57))
>x : Symbol(x, Decl(ipromise4.ts, 13, 57))