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| 1 | //===----------------------------------------------------------------------===// |
|---|---|
| 2 | // |
| 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 |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #ifndef _LIBCPP___RANDOM_UNIFORM_RANDOM_BIT_GENERATOR_H |
| 10 | #define _LIBCPP___RANDOM_UNIFORM_RANDOM_BIT_GENERATOR_H |
| 11 | |
| 12 | #include <__concepts/arithmetic.h> |
| 13 | #include <__concepts/invocable.h> |
| 14 | #include <__concepts/same_as.h> |
| 15 | #include <__config> |
| 16 | #include <__type_traits/integral_constant.h> |
| 17 | #include <__type_traits/invoke.h> |
| 18 | |
| 19 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| 20 | # pragma GCC system_header |
| 21 | #endif |
| 22 | |
| 23 | _LIBCPP_PUSH_MACROS |
| 24 | #include <__undef_macros> |
| 25 | |
| 26 | _LIBCPP_BEGIN_NAMESPACE_STD |
| 27 | |
| 28 | #if _LIBCPP_STD_VER >= 20 |
| 29 | |
| 30 | // [rand.req.urng] |
| 31 | template <class _Gen> |
| 32 | concept uniform_random_bit_generator = invocable<_Gen&> && unsigned_integral<invoke_result_t<_Gen&>> && requires { |
| 33 | { _Gen::min() } -> same_as<invoke_result_t<_Gen&>>; |
| 34 | { _Gen::max() } -> same_as<invoke_result_t<_Gen&>>; |
| 35 | requires bool_constant<(_Gen::min() < _Gen::max())>::value; |
| 36 | }; |
| 37 | |
| 38 | #endif // _LIBCPP_STD_VER >= 20 |
| 39 | |
| 40 | _LIBCPP_END_NAMESPACE_STD |
| 41 | |
| 42 | _LIBCPP_POP_MACROS |
| 43 | |
| 44 | #endif // _LIBCPP___RANDOM_UNIFORM_RANDOM_BIT_GENERATOR_H |
| 45 |
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