Function makeWrapHost

packages/compiler-cli/test/ngtsc/env.ts:484–496

(wrapped: AugmentedCompilerHost)

}

function makeWrapHost(wrapped: AugmentedCompilerHost): (host: ts.CompilerHost) => ts.CompilerHost {
  return (delegate) => {
    wrapped.delegate = delegate;
    return new Proxy(delegate, {
      get: (target: ts.CompilerHost, name: string): any => {
        if ((wrapped as any)[name] !== undefined) {
          return (wrapped as any)[name]!.bind(wrapped);
        }
        return (target as any)[name];
      },
    });
  };
}