| // CWG 150: Matching of template template-arguments excludes compatible |
| // templates |
| // { dg-options -fnew-ttp-matching } |
| |
| template<class T> class A { /* ... */ }; |
| template<class T, class U = T> class B { /* ... */ }; |
| template<template<class> class P> class X { /* ... */ }; |
| X<A> xa; // OK |
| X<B> xb; // OK since P0522R0 |
| |
| #if __cpp_variadic_templates |
| template <class ... Types> class C { /* ... */ }; |
| template<template<class ...> class Q> class Y { /* ... */ }; |
| X<C> xc; // OK since P0522R0 |
| Y<A> ya; // OK |
| Y<B> yb; // OK |
| Y<C> yc; // OK |
| #endif |
| |
| #if __cpp_template_auto |
| template<auto n> class D { /* ... */ }; |
| template<template<int> class R> class Z { /* ... */ }; |
| Z<D> zd; // OK |
| #endif |
