47 lines
1.4 KiB
C++
47 lines
1.4 KiB
C++
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// Copyright 2014 Renato Tegon Forti, Antony Polukhin.
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// Copyright Antony Polukhin, 2015-2022.
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt
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// or copy at http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_STACKTRACE_DETAIL_VOID_PTR_CAST_HPP
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#define BOOST_STACKTRACE_DETAIL_VOID_PTR_CAST_HPP
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#include <boost/config.hpp>
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#ifdef BOOST_HAS_PRAGMA_ONCE
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# pragma once
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#endif
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#include <boost/static_assert.hpp>
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#include <boost/type_traits/is_pointer.hpp>
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#if defined(__GNUC__) && defined(__GNUC_MINOR__) && (__GNUC__ * 100 + __GNUC_MINOR__ > 301)
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# pragma GCC system_header
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#endif
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namespace boost { namespace stacktrace { namespace detail {
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// GCC warns when reinterpret_cast between function pointer and object pointer occur.
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// This functionsuppress the warnings and ensures that such casts are safe.
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template <class To, class From>
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To void_ptr_cast(From* v) BOOST_NOEXCEPT {
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BOOST_STATIC_ASSERT_MSG(
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boost::is_pointer<To>::value,
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"`void_ptr_cast` function must be used only for casting to or from void pointers."
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);
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BOOST_STATIC_ASSERT_MSG(
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sizeof(From*) == sizeof(To),
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"Pointer to function and pointer to object differ in size on your platform."
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);
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return reinterpret_cast<To>(v);
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}
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}}} // boost::stacktrace::detail
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#endif // BOOST_STACKTRACE_DETAIL_VOID_PTR_CAST_HPP
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