Bit Operations: P0556, P0553 and P1355. Reviewed as: https://reviews.llvm.org/D51262
llvm-svn: 364862
diff --git a/libcxx/test/std/numerics/bit/bitops.rot/rotl.pass.cpp b/libcxx/test/std/numerics/bit/bitops.rot/rotl.pass.cpp
new file mode 100644
index 0000000..84ffe5b
--- /dev/null
+++ b/libcxx/test/std/numerics/bit/bitops.rot/rotl.pass.cpp
@@ -0,0 +1,167 @@
+//===----------------------------------------------------------------------===//
+//
+// 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, c++17
+
+// template <class T>
+// constexpr int rotl(T x, unsigned int s) noexcept;
+
+// Remarks: This function shall not participate in overload resolution unless
+// T is an unsigned integer type
+
+#include <bit>
+#include <cstdint>
+#include <type_traits>
+#include <cassert>
+
+#include "test_macros.h"
+
+class A{};
+enum E1 : unsigned char { rEd };
+enum class E2 : unsigned char { red };
+
+template <typename T>
+constexpr bool constexpr_test()
+{
+ const T max = std::numeric_limits<T>::max();
+ return std::rotl(T(1), 0) == T( 1)
+ && std::rotl(T(1), 1) == T( 2)
+ && std::rotl(T(1), 2) == T( 4)
+ && std::rotl(T(1), 3) == T( 8)
+ && std::rotl(T(1), 4) == T( 16)
+ && std::rotl(T(1), 5) == T( 32)
+ && std::rotl(T(1), 6) == T( 64)
+ && std::rotl(T(1), 7) == T(128)
+ && std::rotl(max, 0) == max
+ && std::rotl(max, 1) == max
+ && std::rotl(max, 2) == max
+ && std::rotl(max, 3) == max
+ && std::rotl(max, 4) == max
+ && std::rotl(max, 5) == max
+ && std::rotl(max, 6) == max
+ && std::rotl(max, 7) == max
+ ;
+}
+
+
+template <typename T>
+void runtime_test()
+{
+ ASSERT_SAME_TYPE(T, decltype(std::rotl(T(0), 0)));
+ ASSERT_NOEXCEPT( std::rotl(T(0), 0));
+ const T val = std::numeric_limits<T>::max() - 1;
+
+ assert( std::rotl(val, 0) == val);
+ assert( std::rotl(val, 1) == T((val << 1) + 1));
+ assert( std::rotl(val, 2) == T((val << 2) + 3));
+ assert( std::rotl(val, 3) == T((val << 3) + 7));
+ assert( std::rotl(val, 4) == T((val << 4) + 15));
+ assert( std::rotl(val, 5) == T((val << 5) + 31));
+ assert( std::rotl(val, 6) == T((val << 6) + 63));
+ assert( std::rotl(val, 7) == T((val << 7) + 127));
+}
+
+int main()
+{
+
+ {
+ auto lambda = [](auto x) -> decltype(std::rotl(x, 1U)) {};
+ using L = decltype(lambda);
+
+ static_assert( std::is_invocable_v<L, unsigned char>, "");
+ static_assert( std::is_invocable_v<L, unsigned int>, "");
+ static_assert( std::is_invocable_v<L, unsigned long>, "");
+ static_assert( std::is_invocable_v<L, unsigned long long>, "");
+
+ static_assert( std::is_invocable_v<L, uint8_t>, "");
+ static_assert( std::is_invocable_v<L, uint16_t>, "");
+ static_assert( std::is_invocable_v<L, uint32_t>, "");
+ static_assert( std::is_invocable_v<L, uint64_t>, "");
+ static_assert( std::is_invocable_v<L, size_t>, "");
+
+ static_assert( std::is_invocable_v<L, uintmax_t>, "");
+ static_assert( std::is_invocable_v<L, uintptr_t>, "");
+
+
+ static_assert(!std::is_invocable_v<L, int>, "");
+ static_assert(!std::is_invocable_v<L, signed int>, "");
+ static_assert(!std::is_invocable_v<L, long>, "");
+ static_assert(!std::is_invocable_v<L, long long>, "");
+
+ static_assert(!std::is_invocable_v<L, int8_t>, "");
+ static_assert(!std::is_invocable_v<L, int16_t>, "");
+ static_assert(!std::is_invocable_v<L, int32_t>, "");
+ static_assert(!std::is_invocable_v<L, int64_t>, "");
+ static_assert(!std::is_invocable_v<L, ptrdiff_t>, "");
+
+ static_assert(!std::is_invocable_v<L, bool>, "");
+ static_assert(!std::is_invocable_v<L, signed char>, "");
+ static_assert(!std::is_invocable_v<L, char16_t>, "");
+ static_assert(!std::is_invocable_v<L, char32_t>, "");
+
+#ifndef _LIBCPP_HAS_NO_INT128
+ static_assert( std::is_invocable_v<L, __uint128_t>, "");
+ static_assert(!std::is_invocable_v<L, __int128_t>, "");
+#endif
+
+ static_assert(!std::is_invocable_v<L, A>, "");
+ static_assert(!std::is_invocable_v<L, E1>, "");
+ static_assert(!std::is_invocable_v<L, E2>, "");
+ }
+
+ static_assert(constexpr_test<unsigned char>(), "");
+ static_assert(constexpr_test<unsigned short>(), "");
+ static_assert(constexpr_test<unsigned>(), "");
+ static_assert(constexpr_test<unsigned long>(), "");
+ static_assert(constexpr_test<unsigned long long>(), "");
+
+ static_assert(constexpr_test<uint8_t>(), "");
+ static_assert(constexpr_test<uint16_t>(), "");
+ static_assert(constexpr_test<uint32_t>(), "");
+ static_assert(constexpr_test<uint64_t>(), "");
+ static_assert(constexpr_test<size_t>(), "");
+ static_assert(constexpr_test<uintmax_t>(), "");
+ static_assert(constexpr_test<uintptr_t>(), "");
+
+#ifndef _LIBCPP_HAS_NO_INT128
+ static_assert(constexpr_test<__uint128_t>(), "");
+#endif
+
+
+ runtime_test<unsigned char>();
+ runtime_test<unsigned short>();
+ runtime_test<unsigned>();
+ runtime_test<unsigned long>();
+ runtime_test<unsigned long long>();
+
+ runtime_test<uint8_t>();
+ runtime_test<uint16_t>();
+ runtime_test<uint32_t>();
+ runtime_test<uint64_t>();
+ runtime_test<size_t>();
+ runtime_test<uintmax_t>();
+ runtime_test<uintptr_t>();
+
+#ifndef _LIBCPP_HAS_NO_INT128
+ runtime_test<__uint128_t>();
+
+ {
+ __uint128_t val = 168; // 0xA8 (aka 10101000)
+
+ assert( std::rotl(val, 128) == 168);
+ val <<= 32;
+ assert( std::rotl(val, 96) == 168);
+ val <<= 2;
+ assert( std::rotl(val, 95) == 336);
+ val <<= 3;
+ assert( std::rotl(val, 90) == 84);
+ assert( std::rotl(val, 218) == 84);
+ }
+#endif
+
+}