[libcxx-commits] [libcxx] [mlir] [llvm] [libc++][concepts] Implements concept helper `__libcpp_integer` (PR #78086)

[Hristo Hristov via libcxx-commits]

https://github.com/H-G-Hristov updated https://github.com/llvm/llvm-project/pull/78086

>From f2008de694bc867efa9632df183f64e3ea194e4e Mon Sep 17 00:00:00 2001
From: Zingam <zingam at outlook.com>
Date: Sun, 14 Jan 2024 09:34:46 +0200
Subject: [PATCH] [libc++][concepts] Implements  concept helper
 `__libcpp_integer`

...and tests.
---
 libcxx/include/__concepts/arithmetic.h        |   4 +
 .../arithmetic.compile.pass.cpp               | 117 ++++++++++++++++++
 2 files changed, 121 insertions(+)
 create mode 100644 libcxx/test/libcxx/concepts/concepts.arithmetic/arithmetic.compile.pass.cpp

diff --git a/libcxx/include/__concepts/arithmetic.h b/libcxx/include/__concepts/arithmetic.h
index f41e4c9f2747cc..0c44f117805f36 100644
--- a/libcxx/include/__concepts/arithmetic.h
+++ b/libcxx/include/__concepts/arithmetic.h
@@ -42,9 +42,13 @@ concept floating_point = is_floating_point_v<_Tp>;
 
 template <class _Tp>
 concept __libcpp_unsigned_integer = __libcpp_is_unsigned_integer<_Tp>::value;
+
 template <class _Tp>
 concept __libcpp_signed_integer = __libcpp_is_signed_integer<_Tp>::value;
 
+template <class _Tp>
+concept __libcpp_integer = __libcpp_unsigned_integer<_Tp> || __libcpp_signed_integer<_Tp>;
+
 #endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD
diff --git a/libcxx/test/libcxx/concepts/concepts.arithmetic/arithmetic.compile.pass.cpp b/libcxx/test/libcxx/concepts/concepts.arithmetic/arithmetic.compile.pass.cpp
new file mode 100644
index 00000000000000..aefe21d852df52
--- /dev/null
+++ b/libcxx/test/libcxx/concepts/concepts.arithmetic/arithmetic.compile.pass.cpp
@@ -0,0 +1,117 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+
+#include <concepts>
+
+struct SomeObject {};
+
+// Concept helpers for the internal type traits for the fundamental types.
+
+// template <class _Tp>
+// concept __libcpp_unsigned_integer;
+
+// Unsigned
+static_assert(std::__libcpp_unsigned_integer<unsigned char>);
+static_assert(std::__libcpp_unsigned_integer<unsigned short int>);
+static_assert(std::__libcpp_unsigned_integer<unsigned int>);
+static_assert(std::__libcpp_unsigned_integer<unsigned long int>);
+static_assert(std::__libcpp_unsigned_integer<unsigned long long int>);
+static_assert(std::__libcpp_unsigned_integer<unsigned short int>);
+#ifndef _LIBCPP_HAS_NO_INT128
+static_assert(std::__libcpp_unsigned_integer<__uint128_t>);
+#endif
+// Signed
+static_assert(!std::__libcpp_unsigned_integer<signed char>);
+static_assert(!std::__libcpp_unsigned_integer<short int>);
+static_assert(!std::__libcpp_unsigned_integer<int>);
+static_assert(!std::__libcpp_unsigned_integer<long int>);
+static_assert(!std::__libcpp_unsigned_integer<long long int>);
+static_assert(!std::__libcpp_unsigned_integer<short int>);
+#ifndef _LIBCPP_HAS_NO_INT128
+static_assert(!std::__libcpp_unsigned_integer<__int128_t>);
+#endif
+// Non-integer
+static_assert(!std::__libcpp_unsigned_integer<bool>);
+static_assert(!std::__libcpp_unsigned_integer<char8_t>);
+static_assert(!std::__libcpp_unsigned_integer<char16_t>);
+static_assert(!std::__libcpp_unsigned_integer<char32_t>);
+static_assert(!std::__libcpp_unsigned_integer<float>);
+static_assert(!std::__libcpp_unsigned_integer<double>);
+static_assert(!std::__libcpp_unsigned_integer<long double>);
+static_assert(!std::__libcpp_unsigned_integer<void>);
+static_assert(!std::__libcpp_unsigned_integer<SomeObject>);
+
+// template <class _Tp>
+// concept __libcpp_signed_integer;
+
+// Unsigned
+static_assert(!std::__libcpp_signed_integer<unsigned char>);
+static_assert(!std::__libcpp_signed_integer<unsigned short int>);
+static_assert(!std::__libcpp_signed_integer<unsigned int>);
+static_assert(!std::__libcpp_signed_integer<unsigned long int>);
+static_assert(!std::__libcpp_signed_integer<unsigned long long int>);
+static_assert(!std::__libcpp_signed_integer<unsigned short int>);
+#ifndef _LIBCPP_HAS_NO_INT128
+static_assert(!std::__libcpp_signed_integer<__uint128_t>);
+#endif
+// Signed
+static_assert(std::__libcpp_signed_integer<signed char>);
+static_assert(std::__libcpp_signed_integer<short int>);
+static_assert(std::__libcpp_signed_integer<int>);
+static_assert(std::__libcpp_signed_integer<long int>);
+static_assert(std::__libcpp_signed_integer<long long int>);
+static_assert(std::__libcpp_signed_integer<short int>);
+#ifndef _LIBCPP_HAS_NO_INT128
+static_assert(std::__libcpp_signed_integer<__int128_t>);
+#endif
+// Non-integer
+static_assert(!std::__libcpp_signed_integer<bool>);
+static_assert(!std::__libcpp_signed_integer<char8_t>);
+static_assert(!std::__libcpp_signed_integer<char16_t>);
+static_assert(!std::__libcpp_signed_integer<char32_t>);
+static_assert(!std::__libcpp_signed_integer<float>);
+static_assert(!std::__libcpp_signed_integer<double>);
+static_assert(!std::__libcpp_signed_integer<long double>);
+static_assert(!std::__libcpp_signed_integer<void>);
+static_assert(!std::__libcpp_signed_integer<SomeObject>);
+
+// template <class _Tp>
+// concept __libcpp_integer;
+
+// Unsigned
+static_assert(std::__libcpp_integer<unsigned char>);
+static_assert(std::__libcpp_integer<unsigned short int>);
+static_assert(std::__libcpp_integer<unsigned int>);
+static_assert(std::__libcpp_integer<unsigned long int>);
+static_assert(std::__libcpp_integer<unsigned long long int>);
+static_assert(std::__libcpp_integer<unsigned short int>);
+#ifndef _LIBCPP_HAS_NO_INT128
+static_assert(std::__libcpp_integer<__uint128_t>);
+#endif
+// Signed
+static_assert(std::__libcpp_integer<signed char>);
+static_assert(std::__libcpp_integer<short int>);
+static_assert(std::__libcpp_integer<int>);
+static_assert(std::__libcpp_integer<long int>);
+static_assert(std::__libcpp_integer<long long int>);
+static_assert(std::__libcpp_integer<short int>);
+#ifndef _LIBCPP_HAS_NO_INT128
+static_assert(std::__libcpp_integer<__int128_t>);
+#endif
+// Non-integer
+static_assert(!std::__libcpp_integer<bool>);
+static_assert(!std::__libcpp_integer<char8_t>);
+static_assert(!std::__libcpp_integer<char16_t>);
+static_assert(!std::__libcpp_integer<char32_t>);
+static_assert(!std::__libcpp_integer<float>);
+static_assert(!std::__libcpp_integer<double>);
+static_assert(!std::__libcpp_integer<long double>);
+static_assert(!std::__libcpp_integer<void>);
+static_assert(!std::__libcpp_integer<SomeObject>);