1 //===----------------------------------------------------------------------===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 #ifndef _LIBCPP___RANDOM_UNIFORM_RANDOM_BIT_GENERATOR_H
10 #define _LIBCPP___RANDOM_UNIFORM_RANDOM_BIT_GENERATOR_H
12 #include <__concepts/arithmetic.h>
13 #include <__concepts/invocable.h>
14 #include <__concepts/same_as.h>
16 #include <type_traits>
18 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
19 # pragma GCC system_header
23 #include <__undef_macros>
25 _LIBCPP_BEGIN_NAMESPACE_STD
27 #if _LIBCPP_STD_VER > 17
31 concept uniform_random_bit_generator =
32 invocable<_Gen&> && unsigned_integral<invoke_result_t<_Gen&>> &&
34 { _Gen::min() } -> same_as<invoke_result_t<_Gen&>>;
35 { _Gen::max() } -> same_as<invoke_result_t<_Gen&>>;
36 requires bool_constant<(_Gen::min() < _Gen::max())>::value;
39 #endif // _LIBCPP_STD_VER > 17
41 _LIBCPP_END_NAMESPACE_STD
45 #endif // _LIBCPP___RANDOM_UNIFORM_RANDOM_BIT_GENERATOR_H