Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.dg/cpp0x/sfinae52.C @ 145:1830386684a0
gcc-9.2.0
author | anatofuz |
---|---|
date | Thu, 13 Feb 2020 11:34:05 +0900 |
parents | 04ced10e8804 |
children |
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// PR c++/62072 // { dg-do compile { target c++11 } } template<typename T> struct tuple_size {}; template<typename T> struct tuple_size<T const> : tuple_size<T> {}; template<typename T, typename = void> struct query { static constexpr bool value = false; }; template<typename T> struct query<T, typename tuple_size<T>::type> { static constexpr bool value = true; }; // fine static_assert( !query<int>::value, "" ); static_assert( !query<int const>::value, "" ); // error: invalid use of incomplete type 'struct tuple_size<void()>' static_assert( !query<void()>::value, "" );