declare module `'tslib'`

Right now, tslib.d.ts does not contain a module declaration for 'tslib’ and instead declares the functions in the global namespace. As of TS 2.1.4, when I enable the --noEmitHelpers and --importHelpers compiler flags, my build fails because it cannot find the required 'tslib' module.

I’m opening an issue because there’s probably a reason this hasn’t been done already, but wouldn’t it be possible to do something like:

// ... existing global typing defs
declare module 'tslib' {
  export function __extends(d: Function, b: Function): void;
  export function __assign(t: any, ...sources: any[]): any;
  export function __rest(t: any, propertyNames: string[]): any;
  export function __decorate(decorators: Function[], target: any, key?: string | symbol, desc?: any): any;
  export function __param(paramIndex: number, decorator: Function): Function;
  export function __metadata(metadataKey: any, metadataValue: any): Function;
  export function __awaiter(thisArg: any, _arguments: any, P: Function, generator: Function): any;
  export function __generator(thisArg: any, body: Function): any;
}

@billti @rbuckton @sandersn for visibility

[rbuckton]

I think part of the issue is that your "typeRoots" definition is incorrect. The "typeRoots" field should point to folders only, and does not support globs. Please refer to www.typescriptlang.org/docs/handbook/tsconfig-json.html#types-typeroots-and-types for more information.

[mhegazy]

Also updated in the readme: https://github.com/Microsoft/tslib/blob/master/README.md#for-bower-users