diff options
Diffstat (limited to 'gcc/testsuite/g++.dg/template/sfinae24.C')
-rw-r--r-- | gcc/testsuite/g++.dg/template/sfinae24.C | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/template/sfinae24.C b/gcc/testsuite/g++.dg/template/sfinae24.C new file mode 100644 index 000000000..7138c96e6 --- /dev/null +++ b/gcc/testsuite/g++.dg/template/sfinae24.C @@ -0,0 +1,26 @@ +// PR c++/44969 + +template<bool, typename T = void> struct enable_if { typedef T type; }; +template<typename T> struct enable_if<false, T> { }; + +template<typename Tp, typename Arg1, typename Arg2> + class mini_is_constructible + { + typedef char one; + typedef struct { char arr[2]; } two; + + template<typename Tp1, typename Arg1_, typename Arg2_> + static typename + enable_if<(sizeof(Tp1(Arg1_(), Arg2_()), 1) > 0), one>::type + test(int); + + template<typename, typename, typename> + static two test(...); + + public: + static const bool value = sizeof(test<Tp, Arg1, Arg2>(0)) == 1; + }; + +class A { }; + +int Test[mini_is_constructible<int, A, A>::value ? -1 : 1]; |