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view gcc/testsuite/g++.dg/template/sfinae27.C @ 111:04ced10e8804
gcc 7
author | kono |
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date | Fri, 27 Oct 2017 22:46:09 +0900 |
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// Origin: PR c++/46162 struct small_type { char dummy; }; struct large_type { char dummy[2]; }; template<class T> struct has_foo_member_variable { template<int T::*> struct tester; template<class U> static small_type has_foo(tester<&U::foo> *); template<class U> static large_type has_foo(...); static const bool value = (sizeof(has_foo<T>(0)) == sizeof(small_type)); }; struct A { static int foo() { return 0; } }; struct B { static int foo; }; void bar() { bool b = has_foo_member_variable<A>::value; }