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Diffstat (limited to 'test/std/experimental/optional/optional.nullops/less_than.pass.cpp')
-rw-r--r-- | test/std/experimental/optional/optional.nullops/less_than.pass.cpp | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/test/std/experimental/optional/optional.nullops/less_than.pass.cpp b/test/std/experimental/optional/optional.nullops/less_than.pass.cpp new file mode 100644 index 000000000000..149c809b0403 --- /dev/null +++ b/test/std/experimental/optional/optional.nullops/less_than.pass.cpp @@ -0,0 +1,41 @@ +//===----------------------------------------------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + + +// <optional> + +// template <class T> constexpr bool operator<(const optional<T>& x, nullopt_t) noexcept; +// template <class T> constexpr bool operator<(nullopt_t, const optional<T>& x) noexcept; + +#include <experimental/optional> + +int main() +{ +#if _LIBCPP_STD_VER > 11 + using std::experimental::optional; + using std::experimental::nullopt_t; + using std::experimental::nullopt; + + { + typedef int T; + typedef optional<T> O; + + constexpr O o1; // disengaged + constexpr O o2{1}; // engaged + + static_assert ( !(nullopt < o1), "" ); + static_assert ( (nullopt < o2), "" ); + static_assert ( !(o1 < nullopt), "" ); + static_assert ( !(o2 < nullopt), "" ); + + static_assert (noexcept(nullopt < o1), ""); + static_assert (noexcept(o1 < nullopt), ""); + } +#endif +} |