From 6ee4001cc957acac39181b68193e1414c3163698 Mon Sep 17 00:00:00 2001 From: Eric Fiselier Date: Wed, 12 Oct 2016 06:45:11 +0000 Subject: Add header. This patch is largely thanks to Casey Carter @ Microsoft. He did the initial work of porting our experimental implementation and tests over to namespace std. llvm-svn: 283977 --- .../optional/optional.nullops/less_equal.pass.cpp | 40 ++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 libcxx/test/std/utilities/optional/optional.nullops/less_equal.pass.cpp (limited to 'libcxx/test/std/utilities/optional/optional.nullops/less_equal.pass.cpp') diff --git a/libcxx/test/std/utilities/optional/optional.nullops/less_equal.pass.cpp b/libcxx/test/std/utilities/optional/optional.nullops/less_equal.pass.cpp new file mode 100644 index 00000000000..8e73247b9d6 --- /dev/null +++ b/libcxx/test/std/utilities/optional/optional.nullops/less_equal.pass.cpp @@ -0,0 +1,40 @@ +//===----------------------------------------------------------------------===// +// +// 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. +// +//===----------------------------------------------------------------------===// + +// UNSUPPORTED: c++98, c++03, c++11, c++14 + +// + +// template constexpr bool operator<=(const optional& x, nullopt_t) noexcept; +// template constexpr bool operator<=(nullopt_t, const optional& x) noexcept; + +#include + +int main() +{ + using std::optional; + using std::nullopt_t; + using std::nullopt; + + { + typedef int T; + typedef optional 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), ""); + } +} -- cgit v1.2.3