diff options
Diffstat (limited to 'test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.wchar.t/compare.pass.cpp')
| -rw-r--r-- | test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.wchar.t/compare.pass.cpp | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.wchar.t/compare.pass.cpp b/test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.wchar.t/compare.pass.cpp index 124201bb82f3..894560d69396 100644 --- a/test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.wchar.t/compare.pass.cpp +++ b/test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.wchar.t/compare.pass.cpp @@ -12,10 +12,22 @@ // template<> struct char_traits<wchar_t> // static int compare(const char_type* s1, const char_type* s2, size_t n); +// constexpr in C++17 #include <string> #include <cassert> +#include "test_macros.h" + +#if TEST_STD_VER > 14 +constexpr bool test_constexpr() +{ + return std::char_traits<wchar_t>::compare(L"123", L"223", 3) < 0 + && std::char_traits<wchar_t>::compare(L"223", L"123", 3) > 0 + && std::char_traits<wchar_t>::compare(L"123", L"123", 3) == 0; +} +#endif + int main() { assert(std::char_traits<wchar_t>::compare(L"", L"", 0) == 0); @@ -38,4 +50,8 @@ int main() assert(std::char_traits<wchar_t>::compare(L"223", L"123", 3) > 0); assert(std::char_traits<wchar_t>::compare(L"133", L"123", 3) > 0); assert(std::char_traits<wchar_t>::compare(L"124", L"123", 3) > 0); + +#if TEST_STD_VER > 14 + static_assert(test_constexpr(), "" ); +#endif } |