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[libcxx] Add <experimental/ratio>

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Summary:
This patch is pretty simple. It just adds the _v traits from <ratio>. 

The draft can be found here.

Reviewers: jroelofs, K-ballo, mclow.lists

Reviewed By: mclow.lists

Subscribers: cfe-commits

Differential Revision: http://reviews.llvm.org/D7351

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@229509 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Fiselier
2015-02-17 16:52:03 +00:00
parent 19efe015fb
commit 13b96fdfbd
11 changed files with 481 additions and 0 deletions
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57
test/std/experimental/utilities/ratio/header.ratio.synop/ratio_less_v.pass.cpp Normal file
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@@ -0,0 +1,57 @@
//===----------------------------------------------------------------------===//
//
// 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
// <experimental/ratio>
// template <class R1, class R2> constexpr bool ratio_less_v;
#include <experimental/ratio>
#include <type_traits>
namespace ex = std::experimental;
int main()
{
{
typedef std::ratio<1, 2> R1;
typedef std::ratio<1, 1> R2;
static_assert(
ex::ratio_less_v<R1, R2>, ""
);
static_assert(
ex::ratio_less_v<R1, R2> == std::ratio_less<R1, R2>::value, ""
);
static_assert(
std::is_same<decltype(ex::ratio_less_v<R1, R2>), const bool>::value
, ""
);
}
{
typedef std::ratio<1, 1> R1;
typedef std::ratio<1, 1> R2;
static_assert(
!ex::ratio_less_v<R1, R2>, ""
);
static_assert(
ex::ratio_less_v<R1, R2> == std::ratio_less<R1, R2>::value, ""
);
}
{
typedef std::ratio<2, 1> R1;
typedef std::ratio<1, 1> R2;
static_assert(
!ex::ratio_less_v<R1, R2>, ""
);
static_assert(
ex::ratio_less_v<R1, R2> == std::ratio_less<R1, R2>::value, ""
);
}
}