1 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
2 // expected-no-diagnostics
3 
4 template<typename> struct Y1;
5 template<typename, int> struct Y2;
6 
7 template<class T1, class T2 = int> using B2 = T1;
8 template<class T1 = int, class T2> using B2 = T1;
9 
10 template<template<class> class F, template<class> class G = Y1> using B2t = F<G<int>>;
11 template<template<class> class F = Y2, template<class> class G> using B2t = F<G<int>>;
12 
13 template<int N, int M = 5> using B2n = Y2<int, N + M>;
14 template<int N = 5, int M> using B2n = Y2<int, N + M>;
15