From 13320a50e5be876b2c2991cbca8a6ed37fce56fd Mon Sep 17 00:00:00 2001
From: Marshall Clow <mclow.lists@gmail.com>
Date: Sat, 26 Nov 2016 18:45:03 +0000
Subject: Implement conjuntion/disjuntion/negation for LFTS v2. Same code and
 tests for the ones in std::

llvm-svn: 287988
---
 libcxx/include/experimental/type_traits            | 18 ++++++
 .../meta/meta.logical/conjunction.pass.cpp         | 68 ++++++++++++++++++++++
 .../meta/meta.logical/disjunction.pass.cpp         | 68 ++++++++++++++++++++++
 .../utilities/meta/meta.logical/negation.pass.cpp  | 41 +++++++++++++
 4 files changed, 195 insertions(+)
 create mode 100644 libcxx/test/std/experimental/utilities/meta/meta.logical/conjunction.pass.cpp
 create mode 100644 libcxx/test/std/experimental/utilities/meta/meta.logical/disjunction.pass.cpp
 create mode 100644 libcxx/test/std/experimental/utilities/meta/meta.logical/negation.pass.cpp

diff --git a/libcxx/include/experimental/type_traits b/libcxx/include/experimental/type_traits
index 524d9800b05..d6901d41a61 100644
--- a/libcxx/include/experimental/type_traits
+++ b/libcxx/include/experimental/type_traits
@@ -459,6 +459,24 @@ template <class _Tp>
 using raw_invocation_type_t = typename raw_invocation_type<_Tp>::type;
 */
 
+// 3.3.3, Logical operator traits
+template <class...> using void_t = void;
+
+template <class... _Args>
+struct conjunction : _VSTD::__and_<_Args...> {};
+template <class... _Args>
+_LIBCPP_CONSTEXPR bool conjunction_v = conjunction<_Args...>::value;
+
+template <class... _Args>
+struct disjunction : _VSTD::__or_<_Args...> {};
+template <class... _Args>
+_LIBCPP_CONSTEXPR bool disjunction_v = disjunction<_Args...>::value;
+
+template <class _Tp>
+struct negation : _VSTD::__not_<_Tp> {};
+template<class _Tp>
+_LIBCPP_CONSTEXPR bool negation_v = negation<_Tp>::value;
+
 // 3.3.4, Detection idiom
 template <class...> using void_t = void;
 
diff --git a/libcxx/test/std/experimental/utilities/meta/meta.logical/conjunction.pass.cpp b/libcxx/test/std/experimental/utilities/meta/meta.logical/conjunction.pass.cpp
new file mode 100644
index 00000000000..cb8db1febd2
--- /dev/null
+++ b/libcxx/test/std/experimental/utilities/meta/meta.logical/conjunction.pass.cpp
@@ -0,0 +1,68 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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/type_traits>
+
+// template<class... B> struct conjunction;                           // C++17
+// template<class... B>
+//   constexpr bool conjunction_v = conjunction<B...>::value;         // C++17
+
+#include <experimental/type_traits>
+#include <cassert>
+
+namespace ex = std::experimental;
+
+struct True  { static constexpr bool value = true; };
+struct False { static constexpr bool value = false; };
+
+int main()
+{
+    static_assert ( ex::conjunction<>::value, "" );
+    static_assert ( ex::conjunction<std::true_type >::value, "" );
+    static_assert (!ex::conjunction<std::false_type>::value, "" );
+
+    static_assert ( ex::conjunction_v<>, "" );
+    static_assert ( ex::conjunction_v<std::true_type >, "" );
+    static_assert (!ex::conjunction_v<std::false_type>, "" );
+
+    static_assert ( ex::conjunction<std::true_type,  std::true_type >::value, "" );
+    static_assert (!ex::conjunction<std::true_type,  std::false_type>::value, "" );
+    static_assert (!ex::conjunction<std::false_type, std::true_type >::value, "" );
+    static_assert (!ex::conjunction<std::false_type, std::false_type>::value, "" );
+
+    static_assert ( ex::conjunction_v<std::true_type,  std::true_type >, "" );
+    static_assert (!ex::conjunction_v<std::true_type,  std::false_type>, "" );
+    static_assert (!ex::conjunction_v<std::false_type, std::true_type >, "" );
+    static_assert (!ex::conjunction_v<std::false_type, std::false_type>, "" );
+
+    static_assert ( ex::conjunction<std::true_type,  std::true_type,  std::true_type >::value, "" );
+    static_assert (!ex::conjunction<std::true_type,  std::false_type, std::true_type >::value, "" );
+    static_assert (!ex::conjunction<std::false_type, std::true_type,  std::true_type >::value, "" );
+    static_assert (!ex::conjunction<std::false_type, std::false_type, std::true_type >::value, "" );
+    static_assert (!ex::conjunction<std::true_type,  std::true_type,  std::false_type>::value, "" );
+    static_assert (!ex::conjunction<std::true_type,  std::false_type, std::false_type>::value, "" );
+    static_assert (!ex::conjunction<std::false_type, std::true_type,  std::false_type>::value, "" );
+    static_assert (!ex::conjunction<std::false_type, std::false_type, std::false_type>::value, "" );
+
+    static_assert ( ex::conjunction_v<std::true_type,  std::true_type,  std::true_type >, "" );
+    static_assert (!ex::conjunction_v<std::true_type,  std::false_type, std::true_type >, "" );
+    static_assert (!ex::conjunction_v<std::false_type, std::true_type,  std::true_type >, "" );
+    static_assert (!ex::conjunction_v<std::false_type, std::false_type, std::true_type >, "" );
+    static_assert (!ex::conjunction_v<std::true_type,  std::true_type,  std::false_type>, "" );
+    static_assert (!ex::conjunction_v<std::true_type,  std::false_type, std::false_type>, "" );
+    static_assert (!ex::conjunction_v<std::false_type, std::true_type,  std::false_type>, "" );
+    static_assert (!ex::conjunction_v<std::false_type, std::false_type, std::false_type>, "" );
+
+    static_assert ( ex::conjunction<True >::value, "" );
+    static_assert (!ex::conjunction<False>::value, "" );
+
+    static_assert ( ex::conjunction_v<True >, "" );
+    static_assert (!ex::conjunction_v<False>, "" );
+}
diff --git a/libcxx/test/std/experimental/utilities/meta/meta.logical/disjunction.pass.cpp b/libcxx/test/std/experimental/utilities/meta/meta.logical/disjunction.pass.cpp
new file mode 100644
index 00000000000..dcdbf09fb09
--- /dev/null
+++ b/libcxx/test/std/experimental/utilities/meta/meta.logical/disjunction.pass.cpp
@@ -0,0 +1,68 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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/type_traits>
+
+// template<class... B> struct disjunction;
+// template<class... B>
+//   constexpr bool disjunction_v = disjunction<B...>::value;
+
+#include <experimental/type_traits>
+#include <cassert>
+
+namespace ex = std::experimental;
+
+struct True  { static constexpr bool value = true; };
+struct False { static constexpr bool value = false; };
+
+int main()
+{
+    static_assert (!ex::disjunction<>::value, "" );
+    static_assert ( ex::disjunction<std::true_type >::value, "" );
+    static_assert (!ex::disjunction<std::false_type>::value, "" );
+
+    static_assert (!ex::disjunction_v<>, "" );
+    static_assert ( ex::disjunction_v<std::true_type >, "" );
+    static_assert (!ex::disjunction_v<std::false_type>, "" );
+
+    static_assert ( ex::disjunction<std::true_type,  std::true_type >::value, "" );
+    static_assert ( ex::disjunction<std::true_type,  std::false_type>::value, "" );
+    static_assert ( ex::disjunction<std::false_type, std::true_type >::value, "" );
+    static_assert (!ex::disjunction<std::false_type, std::false_type>::value, "" );
+
+    static_assert ( ex::disjunction_v<std::true_type,  std::true_type >, "" );
+    static_assert ( ex::disjunction_v<std::true_type,  std::false_type>, "" );
+    static_assert ( ex::disjunction_v<std::false_type, std::true_type >, "" );
+    static_assert (!ex::disjunction_v<std::false_type, std::false_type>, "" );
+
+    static_assert ( ex::disjunction<std::true_type,  std::true_type,  std::true_type >::value, "" );
+    static_assert ( ex::disjunction<std::true_type,  std::false_type, std::true_type >::value, "" );
+    static_assert ( ex::disjunction<std::false_type, std::true_type,  std::true_type >::value, "" );
+    static_assert ( ex::disjunction<std::false_type, std::false_type, std::true_type >::value, "" );
+    static_assert ( ex::disjunction<std::true_type,  std::true_type,  std::false_type>::value, "" );
+    static_assert ( ex::disjunction<std::true_type,  std::false_type, std::false_type>::value, "" );
+    static_assert ( ex::disjunction<std::false_type, std::true_type,  std::false_type>::value, "" );
+    static_assert (!ex::disjunction<std::false_type, std::false_type, std::false_type>::value, "" );
+
+    static_assert ( ex::disjunction_v<std::true_type,  std::true_type,  std::true_type >, "" );
+    static_assert ( ex::disjunction_v<std::true_type,  std::false_type, std::true_type >, "" );
+    static_assert ( ex::disjunction_v<std::false_type, std::true_type,  std::true_type >, "" );
+    static_assert ( ex::disjunction_v<std::false_type, std::false_type, std::true_type >, "" );
+    static_assert ( ex::disjunction_v<std::true_type,  std::true_type,  std::false_type>, "" );
+    static_assert ( ex::disjunction_v<std::true_type,  std::false_type, std::false_type>, "" );
+    static_assert ( ex::disjunction_v<std::false_type, std::true_type,  std::false_type>, "" );
+    static_assert (!ex::disjunction_v<std::false_type, std::false_type, std::false_type>, "" );
+
+    static_assert ( ex::disjunction<True >::value, "" );
+    static_assert (!ex::disjunction<False>::value, "" );
+
+    static_assert ( ex::disjunction_v<True >, "" );
+    static_assert (!ex::disjunction_v<False>, "" );
+}
diff --git a/libcxx/test/std/experimental/utilities/meta/meta.logical/negation.pass.cpp b/libcxx/test/std/experimental/utilities/meta/meta.logical/negation.pass.cpp
new file mode 100644
index 00000000000..b0d43d7e512
--- /dev/null
+++ b/libcxx/test/std/experimental/utilities/meta/meta.logical/negation.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.
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++98, c++03, c++11
+// <experimental/type_traits>
+
+// template<class B> struct negation;
+// template<class B>
+//   constexpr bool negation_v = negation<B>::value;
+
+#include <experimental/type_traits>
+#include <cassert>
+
+namespace ex = std::experimental;
+
+struct True  { static constexpr bool value = true; };
+struct False { static constexpr bool value = false; };
+
+int main()
+{
+    static_assert (!ex::negation<std::true_type >::value, "" );
+    static_assert ( ex::negation<std::false_type>::value, "" );
+
+    static_assert (!ex::negation_v<std::true_type >, "" );
+    static_assert ( ex::negation_v<std::false_type>, "" );
+
+    static_assert (!ex::negation<True >::value, "" );
+    static_assert ( ex::negation<False>::value, "" );
+
+    static_assert (!ex::negation_v<True >, "" );
+    static_assert ( ex::negation_v<False>, "" );
+
+    static_assert ( ex::negation<ex::negation<std::true_type >>::value, "" );
+    static_assert (!ex::negation<ex::negation<std::false_type>>::value, "" );
+}
-- 
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