dojo-2.0.d.ts

// ambient module definition
declare module 'dojo-core/Promise' {
	// interface definition
	export interface Executor<T> {
		(resolve: (value?: T | Thenable<T>) => void, reject: (reason?: any) => void): void;
	}
	
	// function definition
	export function isThenable(value: any): boolean;

	// class definition
	export class PromiseShim<T> implements Thenable<T> {
	}

	// interface definition
	export interface Thenable<T> {
	    then<U>(onFulfilled?: (value?: T) => U | Thenable<U>, onRejected?: (error?: any) => U | Thenable<U>): Thenable<U>;
	}
}

thing.ts

import { Promise, Thenable } from 'dojo-core/Promise';

// The compiler knows about 'dojo-core/Promise' from the .d.ts file and we
// can use Promise as if we were compiling dojo-core/Promise from a .ts file.