diff options
Diffstat (limited to 'test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char16_t/compare.pass.cpp')
| -rw-r--r-- | test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char16_t/compare.pass.cpp | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char16_t/compare.pass.cpp b/test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char16_t/compare.pass.cpp index 7356097a6677..b4be1402ad1c 100644 --- a/test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char16_t/compare.pass.cpp +++ b/test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char16_t/compare.pass.cpp @@ -12,12 +12,23 @@ // template<> struct char_traits<char16_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<char16_t>::compare(u"123", u"223", 3) < 0 + && std::char_traits<char16_t>::compare(u"223", u"123", 3) > 0 + && std::char_traits<char16_t>::compare(u"123", u"123", 3) == 0; +} +#endif + + int main() { #ifndef _LIBCPP_HAS_NO_UNICODE_CHARS @@ -43,5 +54,9 @@ int main() assert(std::char_traits<char16_t>::compare(u"133", u"123", 3) > 0); assert(std::char_traits<char16_t>::compare(u"124", u"123", 3) > 0); #endif + +#if TEST_STD_VER > 14 + static_assert(test_constexpr(), "" ); +#endif #endif // _LIBCPP_HAS_NO_UNICODE_CHARS } |