|  | // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s | 
|  |  | 
|  | void f(); | 
|  |  | 
|  | // Test typeof(expr) canonicalization | 
|  | template<typename T, T N> | 
|  | void f0(T x, decltype(f(N, x)) y) { } // expected-note{{previous}} | 
|  |  | 
|  | template<typename T, T N> | 
|  | void f0(T x, decltype((f)(N, x)) y) { } | 
|  |  | 
|  | template<typename U, U M> | 
|  | void f0(U u, decltype(f(M, u))) { } // expected-error{{redefinition}} | 
|  |  | 
|  | // PR12438: Test sizeof...() canonicalization | 
|  | template<int> struct N {}; | 
|  |  | 
|  | template<typename...T> | 
|  | N<sizeof...(T)> f1() {} // expected-note{{previous}} | 
|  |  | 
|  | template<typename, typename...T> | 
|  | N<sizeof...(T)> f1() {} | 
|  |  | 
|  | template<class...U> | 
|  | N<sizeof...(U)> f1() {} // expected-error{{redefinition}} |