290 lines
12 KiB
Plaintext
290 lines
12 KiB
Plaintext
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//
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// Copyright (c) Antony Polukhin, 2012-2016.
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//
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef BOOST_TYPE_INDEX_DETAIL_COMPILE_TIME_TYPE_INFO_HPP
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#define BOOST_TYPE_INDEX_DETAIL_COMPILE_TIME_TYPE_INFO_HPP
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/// \file compile_time_type_info.hpp
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/// \brief Contains helper macros and implementation details of boost::typeindex::ctti_type_index.
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/// Not intended for inclusion from user's code.
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#include <boost/config.hpp>
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#include <boost/static_assert.hpp>
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#include <boost/mpl/bool.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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/// @cond
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#define BOOST_TYPE_INDEX_REGISTER_CTTI_PARSING_PARAMS(begin_skip, end_skip, runtime_skip, runtime_skip_until) \
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namespace boost { namespace typeindex { namespace detail { \
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BOOST_STATIC_CONSTEXPR std::size_t ctti_skip_size_at_begin = begin_skip; \
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BOOST_STATIC_CONSTEXPR std::size_t ctti_skip_size_at_end = end_skip; \
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BOOST_STATIC_CONSTEXPR bool ctti_skip_more_at_runtime = runtime_skip; \
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BOOST_STATIC_CONSTEXPR char ctti_skip_until_runtime[] = runtime_skip_until; \
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}}} /* namespace boost::typeindex::detail */ \
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/**/
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/// @endcond
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#if defined(BOOST_TYPE_INDEX_DOXYGEN_INVOKED)
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/* Nothing to document. All the macro docs are moved to <boost/type_index.hpp> */
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#elif defined(BOOST_TYPE_INDEX_CTTI_USER_DEFINED_PARSING)
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# include <boost/preprocessor/facilities/expand.hpp>
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BOOST_PP_EXPAND( BOOST_TYPE_INDEX_REGISTER_CTTI_PARSING_PARAMS BOOST_TYPE_INDEX_CTTI_USER_DEFINED_PARSING )
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#elif defined(_MSC_VER) && defined (BOOST_NO_CXX11_NOEXCEPT)
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// sizeof("const char *__cdecl boost::detail::ctti<") - 1, sizeof(">::n(void)") - 1
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BOOST_TYPE_INDEX_REGISTER_CTTI_PARSING_PARAMS(40, 10, false, "")
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#elif defined(_MSC_VER) && !defined (BOOST_NO_CXX11_NOEXCEPT)
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// sizeof("const char *__cdecl boost::detail::ctti<") - 1, sizeof(">::n(void) noexcept") - 1
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BOOST_TYPE_INDEX_REGISTER_CTTI_PARSING_PARAMS(40, 19, false, "")
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#elif defined(__clang__) && defined(__APPLE__)
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// Someone made __clang_major__ equal to LLVM version rather than compiler version
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// on APPLE platform.
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//
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// Using less efficient solution because there is no good way to detect real version of Clang.
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// sizeof("static const char *boost::detail::ctti<") - 1, sizeof("]") - 1, true, "???????????>::n() [T = int"
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BOOST_TYPE_INDEX_REGISTER_CTTI_PARSING_PARAMS(39, 1, true, "T = ")
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#elif defined(__clang__) && (__clang_major__ < 3 || (__clang_major__ == 3 && __clang_minor__ == 0))
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// sizeof("static const char *boost::detail::ctti<") - 1, sizeof(">::n()") - 1
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// note: checked on 3.0
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BOOST_TYPE_INDEX_REGISTER_CTTI_PARSING_PARAMS(39, 6, false, "")
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#elif defined(__clang__) && (__clang_major__ >= 4 || (__clang_major__ == 3 && __clang_minor__ > 0))
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// sizeof("static const char *boost::detail::ctti<") - 1, sizeof("]") - 1, true, "int>::n() [T = int"
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// note: checked on 3.1, 3.4
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BOOST_TYPE_INDEX_REGISTER_CTTI_PARSING_PARAMS(39, 1, true, "T = ")
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#elif defined(__GNUC__) && !defined(BOOST_NO_CXX14_CONSTEXPR)
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// sizeof("static contexpr char boost::detail::ctti<T>::s() [with unsigned int I = 0u; T = ") - 1, sizeof("]") - 1
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BOOST_TYPE_INDEX_REGISTER_CTTI_PARSING_PARAMS(81, 1, false, "")
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#elif defined(__GNUC__) && defined(BOOST_NO_CXX14_CONSTEXPR)
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// sizeof("static const char* boost::detail::ctti<T>::n() [with T = ") - 1, sizeof("]") - 1
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BOOST_TYPE_INDEX_REGISTER_CTTI_PARSING_PARAMS(57, 1, false, "")
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#else
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// Deafult code for other platforms... Just skip nothing!
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BOOST_TYPE_INDEX_REGISTER_CTTI_PARSING_PARAMS(0, 0, false, "")
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#endif
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#undef BOOST_TYPE_INDEX_REGISTER_CTTI_PARSING_PARAMS
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namespace boost { namespace typeindex { namespace detail {
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template <bool Condition>
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BOOST_CXX14_CONSTEXPR inline void assert_compile_time_legths() BOOST_NOEXCEPT {
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BOOST_STATIC_ASSERT_MSG(
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Condition,
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"TypeIndex library is misconfigured for your compiler. "
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"Please define BOOST_TYPE_INDEX_CTTI_USER_DEFINED_PARSING to correct values. See section "
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"'RTTI emulation limitations' of the documentation for more information."
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);
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}
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template <class T>
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BOOST_CXX14_CONSTEXPR inline void failed_to_get_function_name() BOOST_NOEXCEPT {
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BOOST_STATIC_ASSERT_MSG(
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sizeof(T) && false,
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"TypeIndex library could not detect your compiler. "
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"Please make the BOOST_TYPE_INDEX_FUNCTION_SIGNATURE macro use "
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"correct compiler macro for getting the whole function name. "
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"Define BOOST_TYPE_INDEX_CTTI_USER_DEFINED_PARSING to correct value after that."
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);
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}
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template <unsigned int ArrayLength>
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BOOST_CXX14_CONSTEXPR inline const char* skip_begining_runtime(const char* begin, boost::mpl::false_) BOOST_NOEXCEPT {
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return begin;
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}
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template<class ForwardIterator1, class ForwardIterator2>
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BOOST_CXX14_CONSTEXPR inline ForwardIterator1 constexpr_search(
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ForwardIterator1 first1,
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ForwardIterator1 last1,
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ForwardIterator2 first2,
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ForwardIterator2 last2) BOOST_NOEXCEPT
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{
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if (first2 == last2) {
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return first1; // specified in C++11
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}
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while (first1 != last1) {
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ForwardIterator1 it1 = first1;
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ForwardIterator2 it2 = first2;
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while (*it1 == *it2) {
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++it1;
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++it2;
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if (it2 == last2) return first1;
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if (it1 == last1) return last1;
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}
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++first1;
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}
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return last1;
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}
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BOOST_CXX14_CONSTEXPR inline int constexpr_strcmp(const char *v1, const char *v2) BOOST_NOEXCEPT {
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while (*v1 != '\0' && *v1 == *v2) {
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++v1;
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++v2;
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};
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return static_cast<int>(*v1) - *v2;
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}
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template <unsigned int ArrayLength>
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BOOST_CXX14_CONSTEXPR inline const char* skip_begining_runtime(const char* begin, boost::mpl::true_) BOOST_NOEXCEPT {
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const char* const it = constexpr_search(
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begin, begin + ArrayLength,
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ctti_skip_until_runtime, ctti_skip_until_runtime + sizeof(ctti_skip_until_runtime) - 1
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);
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return (it == begin + ArrayLength ? begin : it + sizeof(ctti_skip_until_runtime) - 1);
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}
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template <unsigned int ArrayLength>
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BOOST_CXX14_CONSTEXPR inline const char* skip_begining(const char* begin) BOOST_NOEXCEPT {
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assert_compile_time_legths<(ArrayLength > ctti_skip_size_at_begin + ctti_skip_size_at_end)>();
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return skip_begining_runtime<ArrayLength - ctti_skip_size_at_begin>(
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begin + ctti_skip_size_at_begin,
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boost::mpl::bool_<ctti_skip_more_at_runtime>()
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);
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}
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#if !defined(__clang__) && defined(__GNUC__) && !defined(BOOST_NO_CXX14_CONSTEXPR)
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template <unsigned int... I>
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struct index_seq {};
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template <typename Left, typename Right>
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struct make_index_sequence_join;
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template <unsigned int... Left, unsigned int... Right>
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struct make_index_sequence_join<index_seq<Left...>, index_seq<Right...> > {
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typedef index_seq<Left..., Right...> type;
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};
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template <unsigned int C, unsigned int D>
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struct make_index_seq_impl {
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typedef typename make_index_sequence_join<
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typename make_index_seq_impl<C, D / 2>::type,
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typename make_index_seq_impl<C + D / 2, (D + 1) / 2>::type
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>::type type;
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};
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template <unsigned int C>
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struct make_index_seq_impl<C, 0> {
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typedef index_seq<> type;
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};
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template <unsigned int C>
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struct make_index_seq_impl<C, 1> {
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typedef index_seq<C> type;
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};
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template <char... C>
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struct cstring {
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static constexpr unsigned int size_ = sizeof...(C);
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static constexpr char data_[size_] = { C... };
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};
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template <char... C>
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constexpr char cstring<C...>::data_[];
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#endif
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}}} // namespace boost::typeindex::detail
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namespace boost { namespace detail {
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/// Noncopyable type_info that does not require RTTI.
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/// CTTI == Compile Time Type Info.
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/// This name must be as short as possible, to avoid code bloat
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template <class T>
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struct ctti {
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#if !defined(__clang__) && defined(__GNUC__) && !defined(BOOST_NO_CXX14_CONSTEXPR)
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//helper functions
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template <unsigned int I>
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constexpr static char s() BOOST_NOEXCEPT { // step
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constexpr unsigned int offset =
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(I >= 10u ? 1u : 0u)
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+ (I >= 100u ? 1u : 0u)
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+ (I >= 1000u ? 1u : 0u)
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+ (I >= 10000u ? 1u : 0u)
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+ (I >= 100000u ? 1u : 0u)
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+ (I >= 1000000u ? 1u : 0u)
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;
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#if defined(BOOST_TYPE_INDEX_FUNCTION_SIGNATURE)
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return BOOST_TYPE_INDEX_FUNCTION_SIGNATURE[I + offset];
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#elif defined(__FUNCSIG__)
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return __FUNCSIG__[I + offset];
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#else
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return __PRETTY_FUNCTION__[I + offset];
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#endif
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}
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template <unsigned int ...Indexes>
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constexpr static const char* impl(::boost::typeindex::detail::index_seq<Indexes...> ) BOOST_NOEXCEPT {
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return ::boost::typeindex::detail::cstring<s<Indexes>()...>::data_;
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}
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template <unsigned int D = 0> // `D` means `Dummy`
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constexpr static const char* n() BOOST_NOEXCEPT {
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#if defined(BOOST_TYPE_INDEX_FUNCTION_SIGNATURE)
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constexpr unsigned int size = sizeof(BOOST_TYPE_INDEX_FUNCTION_SIGNATURE);
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#elif defined(__FUNCSIG__)
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constexpr unsigned int size = sizeof(__FUNCSIG__);
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#elif defined(__PRETTY_FUNCTION__) \
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|| defined(__GNUC__) \
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|| (defined(__SUNPRO_CC) && (__SUNPRO_CC >= 0x5130)) \
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|| (defined(__MWERKS__) && (__MWERKS__ >= 0x3000)) \
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|| (defined(__ICC) && (__ICC >= 600)) \
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|| defined(__ghs__) \
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|| defined(__DMC__)
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constexpr unsigned int size = sizeof(__PRETTY_FUNCTION__);
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#else
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boost::typeindex::detail::failed_to_get_function_name();
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#endif
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boost::typeindex::detail::assert_compile_time_legths<
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(size > boost::typeindex::detail::ctti_skip_size_at_begin + boost::typeindex::detail::ctti_skip_size_at_end + sizeof("const *") - 1)
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>();
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static_assert(!boost::typeindex::detail::ctti_skip_more_at_runtime, "Skipping for GCC in C++14 mode is unsupported");
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typedef typename boost::typeindex::detail::make_index_seq_impl<
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boost::typeindex::detail::ctti_skip_size_at_begin,
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size - sizeof("const *") + 1 - boost::typeindex::detail::ctti_skip_size_at_begin
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>::type idx_seq;
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return impl(idx_seq());
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}
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#else
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/// Returns raw name. Must be as short, as possible, to avoid code bloat
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BOOST_CXX14_CONSTEXPR static const char* n() BOOST_NOEXCEPT {
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#if defined(BOOST_TYPE_INDEX_FUNCTION_SIGNATURE)
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return boost::typeindex::detail::skip_begining< sizeof(BOOST_TYPE_INDEX_FUNCTION_SIGNATURE) >(BOOST_TYPE_INDEX_FUNCTION_SIGNATURE);
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#elif defined(__FUNCSIG__)
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return boost::typeindex::detail::skip_begining< sizeof(__FUNCSIG__) >(__FUNCSIG__);
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#elif defined(__PRETTY_FUNCTION__) \
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|| defined(__GNUC__) \
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|| (defined(__SUNPRO_CC) && (__SUNPRO_CC >= 0x5130)) \
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|| (defined(__MWERKS__) && (__MWERKS__ >= 0x3000)) \
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|| (defined(__ICC) && (__ICC >= 600)) \
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|| defined(__ghs__) \
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|| defined(__DMC__)
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return boost::typeindex::detail::skip_begining< sizeof(__PRETTY_FUNCTION__) >(__PRETTY_FUNCTION__);
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#else
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boost::typeindex::detail::failed_to_get_function_name();
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return "";
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#endif
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}
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#endif
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};
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}} // namespace boost::detail
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#endif // BOOST_TYPE_INDEX_DETAIL_COMPILE_TIME_TYPE_INFO_HPP
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