| 1 | //===-- is_signed type_traits -----------------------------------*- C++ -*-===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | #ifndef LLVM_LIBC_SRC___SUPPORT_CPP_TYPE_TRAITS_IS_SIGNED_H |
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| 9 | #define LLVM_LIBC_SRC___SUPPORT_CPP_TYPE_TRAITS_IS_SIGNED_H |
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| 10 | |
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| 11 | #include "src/__support/CPP/type_traits/bool_constant.h" |
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| 12 | #include "src/__support/CPP/type_traits/is_arithmetic.h" |
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| 13 | #include "src/__support/macros/attributes.h" |
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| 14 | |
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| 15 | namespace LIBC_NAMESPACE::cpp { |
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| 16 | |
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| 17 | // is_signed |
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| 18 | template <typename T> |
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| 19 | struct is_signed : bool_constant<(is_arithmetic_v<T> && (T(-1) < T(0)))> { |
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| 20 | LIBC_INLINE constexpr operator bool() const { return is_signed::value; } |
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| 21 | LIBC_INLINE constexpr bool operator()() const { return is_signed::value; } |
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| 22 | }; |
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| 23 | template <typename T> |
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| 24 | LIBC_INLINE_VAR constexpr bool is_signed_v = is_signed<T>::value; |
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| 25 | |
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| 26 | } // namespace LIBC_NAMESPACE::cpp |
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| 27 | |
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| 28 | #endif // LLVM_LIBC_SRC___SUPPORT_CPP_TYPE_TRAITS_IS_SIGNED_H |
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| 29 | |
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