50 lines
1.1 KiB
C++
50 lines
1.1 KiB
C++
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/*
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Copyright 2024 Glen Joseph Fernandes
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(glenjofe@gmail.com)
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Distributed under the Boost Software License, Version 1.0.
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(http://www.boost.org/LICENSE_1_0.txt)
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*/
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#ifndef BOOST_CORE_POINTER_IN_RANGE_HPP
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#define BOOST_CORE_POINTER_IN_RANGE_HPP
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#include <boost/config.hpp>
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#include <functional>
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#if !defined(BOOST_NO_CXX14_CONSTEXPR)
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#if defined(BOOST_MSVC) && BOOST_MSVC >= 1925
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#define BOOST_CORE_DETAIL_HAS_IS_CONSTEVAL
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#elif defined(__has_builtin)
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#if __has_builtin(__builtin_is_constant_evaluated)
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#define BOOST_CORE_DETAIL_HAS_IS_CONSTEVAL
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#endif
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#endif
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#endif
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#if !defined(BOOST_CORE_DETAIL_HAS_IS_CONSTEVAL)
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#define BOOST_CORE_NO_CONSTEXPR_POINTER_IN_RANGE
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#endif
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namespace boost {
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template<class T>
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inline BOOST_CONSTEXPR bool
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pointer_in_range(const T* p, const T* b, const T* e)
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{
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#if defined(BOOST_CORE_DETAIL_HAS_IS_CONSTEVAL)
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if ( __builtin_is_constant_evaluated()) {
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for (; b != e; ++b) {
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if (b == p) {
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return true;
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}
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}
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return false;
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}
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#endif
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return std::less_equal<const T*>()(b, p) && std::less<const T*>()(p, e);
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}
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} /* boost */
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#endif
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