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Diffstat (limited to 'contrib/src/boost/type_index/detail/compile_time_type_info.hpp')
| -rw-r--r-- | contrib/src/boost/type_index/detail/compile_time_type_info.hpp | 289 |
1 files changed, 289 insertions, 0 deletions
diff --git a/contrib/src/boost/type_index/detail/compile_time_type_info.hpp b/contrib/src/boost/type_index/detail/compile_time_type_info.hpp new file mode 100644 index 0000000..a2a89ae --- /dev/null +++ b/contrib/src/boost/type_index/detail/compile_time_type_info.hpp @@ -0,0 +1,289 @@ +// +// Copyright (c) Antony Polukhin, 2012-2016. +// +// +// Distributed under the Boost Software License, Version 1.0. (See accompanying +// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) +// + +#ifndef BOOST_TYPE_INDEX_DETAIL_COMPILE_TIME_TYPE_INFO_HPP +#define BOOST_TYPE_INDEX_DETAIL_COMPILE_TIME_TYPE_INFO_HPP + +/// \file compile_time_type_info.hpp +/// \brief Contains helper macros and implementation details of boost::typeindex::ctti_type_index. +/// Not intended for inclusion from user's code. + +#include <boost/config.hpp> +#include <boost/static_assert.hpp> +#include <boost/mpl/bool.hpp> + +#ifdef BOOST_HAS_PRAGMA_ONCE +# pragma once +#endif + +/// @cond +#define BOOST_TYPE_INDEX_REGISTER_CTTI_PARSING_PARAMS(begin_skip, end_skip, runtime_skip, runtime_skip_until) \ + namespace boost { namespace typeindex { namespace detail { \ + BOOST_STATIC_CONSTEXPR std::size_t ctti_skip_size_at_begin = begin_skip; \ + BOOST_STATIC_CONSTEXPR std::size_t ctti_skip_size_at_end = end_skip; \ + BOOST_STATIC_CONSTEXPR bool ctti_skip_more_at_runtime = runtime_skip; \ + BOOST_STATIC_CONSTEXPR char ctti_skip_until_runtime[] = runtime_skip_until; \ + }}} /* namespace boost::typeindex::detail */ \ + /**/ +/// @endcond + + +#if defined(BOOST_TYPE_INDEX_DOXYGEN_INVOKED) + /* Nothing to document. All the macro docs are moved to <boost/type_index.hpp> */ +#elif defined(BOOST_TYPE_INDEX_CTTI_USER_DEFINED_PARSING) +# include <boost/preprocessor/facilities/expand.hpp> + BOOST_PP_EXPAND( BOOST_TYPE_INDEX_REGISTER_CTTI_PARSING_PARAMS BOOST_TYPE_INDEX_CTTI_USER_DEFINED_PARSING ) +#elif defined(_MSC_VER) && defined (BOOST_NO_CXX11_NOEXCEPT) + // sizeof("const char *__cdecl boost::detail::ctti<") - 1, sizeof(">::n(void)") - 1 + BOOST_TYPE_INDEX_REGISTER_CTTI_PARSING_PARAMS(40, 10, false, "") +#elif defined(_MSC_VER) && !defined (BOOST_NO_CXX11_NOEXCEPT) + // sizeof("const char *__cdecl boost::detail::ctti<") - 1, sizeof(">::n(void) noexcept") - 1 + BOOST_TYPE_INDEX_REGISTER_CTTI_PARSING_PARAMS(40, 19, false, "") +#elif defined(__clang__) && defined(__APPLE__) + // Someone made __clang_major__ equal to LLVM version rather than compiler version + // on APPLE platform. + // + // Using less efficient solution because there is no good way to detect real version of Clang. + // sizeof("static const char *boost::detail::ctti<") - 1, sizeof("]") - 1, true, "???????????>::n() [T = int" + BOOST_TYPE_INDEX_REGISTER_CTTI_PARSING_PARAMS(39, 1, true, "T = ") +#elif defined(__clang__) && (__clang_major__ < 3 || (__clang_major__ == 3 && __clang_minor__ == 0)) + // sizeof("static const char *boost::detail::ctti<") - 1, sizeof(">::n()") - 1 + // note: checked on 3.0 + BOOST_TYPE_INDEX_REGISTER_CTTI_PARSING_PARAMS(39, 6, false, "") +#elif defined(__clang__) && (__clang_major__ >= 4 || (__clang_major__ == 3 && __clang_minor__ > 0)) + // sizeof("static const char *boost::detail::ctti<") - 1, sizeof("]") - 1, true, "int>::n() [T = int" + // note: checked on 3.1, 3.4 + BOOST_TYPE_INDEX_REGISTER_CTTI_PARSING_PARAMS(39, 1, true, "T = ") +#elif defined(__GNUC__) && !defined(BOOST_NO_CXX14_CONSTEXPR) + // sizeof("static contexpr char boost::detail::ctti<T>::s() [with unsigned int I = 0u; T = ") - 1, sizeof("]") - 1 + BOOST_TYPE_INDEX_REGISTER_CTTI_PARSING_PARAMS(81, 1, false, "") +#elif defined(__GNUC__) && defined(BOOST_NO_CXX14_CONSTEXPR) + // sizeof("static const char* boost::detail::ctti<T>::n() [with T = ") - 1, sizeof("]") - 1 + BOOST_TYPE_INDEX_REGISTER_CTTI_PARSING_PARAMS(57, 1, false, "") +#else + // Deafult code for other platforms... Just skip nothing! + BOOST_TYPE_INDEX_REGISTER_CTTI_PARSING_PARAMS(0, 0, false, "") +#endif + +#undef BOOST_TYPE_INDEX_REGISTER_CTTI_PARSING_PARAMS + +namespace boost { namespace typeindex { namespace detail { + template <bool Condition> + BOOST_CXX14_CONSTEXPR inline void assert_compile_time_legths() BOOST_NOEXCEPT { + BOOST_STATIC_ASSERT_MSG( + Condition, + "TypeIndex library is misconfigured for your compiler. " + "Please define BOOST_TYPE_INDEX_CTTI_USER_DEFINED_PARSING to correct values. See section " + "'RTTI emulation limitations' of the documentation for more information." + ); + } + + template <class T> + BOOST_CXX14_CONSTEXPR inline void failed_to_get_function_name() BOOST_NOEXCEPT { + BOOST_STATIC_ASSERT_MSG( + sizeof(T) && false, + "TypeIndex library could not detect your compiler. " + "Please make the BOOST_TYPE_INDEX_FUNCTION_SIGNATURE macro use " + "correct compiler macro for getting the whole function name. " + "Define BOOST_TYPE_INDEX_CTTI_USER_DEFINED_PARSING to correct value after that." + ); + } + + template <unsigned int ArrayLength> + BOOST_CXX14_CONSTEXPR inline const char* skip_begining_runtime(const char* begin, boost::mpl::false_) BOOST_NOEXCEPT { + return begin; + } + + template<class ForwardIterator1, class ForwardIterator2> + BOOST_CXX14_CONSTEXPR inline ForwardIterator1 constexpr_search( + ForwardIterator1 first1, + ForwardIterator1 last1, + ForwardIterator2 first2, + ForwardIterator2 last2) BOOST_NOEXCEPT + { + if (first2 == last2) { + return first1; // specified in C++11 + } + + while (first1 != last1) { + ForwardIterator1 it1 = first1; + ForwardIterator2 it2 = first2; + + while (*it1 == *it2) { + ++it1; + ++it2; + if (it2 == last2) return first1; + if (it1 == last1) return last1; + } + + ++first1; + } + + return last1; + } + + BOOST_CXX14_CONSTEXPR inline int constexpr_strcmp(const char *v1, const char *v2) BOOST_NOEXCEPT { + while (*v1 != '\0' && *v1 == *v2) { + ++v1; + ++v2; + }; + + return static_cast<int>(*v1) - *v2; + } + + template <unsigned int ArrayLength> + BOOST_CXX14_CONSTEXPR inline const char* skip_begining_runtime(const char* begin, boost::mpl::true_) BOOST_NOEXCEPT { + const char* const it = constexpr_search( + begin, begin + ArrayLength, + ctti_skip_until_runtime, ctti_skip_until_runtime + sizeof(ctti_skip_until_runtime) - 1 + ); + return (it == begin + ArrayLength ? begin : it + sizeof(ctti_skip_until_runtime) - 1); + } + + template <unsigned int ArrayLength> + BOOST_CXX14_CONSTEXPR inline const char* skip_begining(const char* begin) BOOST_NOEXCEPT { + assert_compile_time_legths<(ArrayLength > ctti_skip_size_at_begin + ctti_skip_size_at_end)>(); + return skip_begining_runtime<ArrayLength - ctti_skip_size_at_begin>( + begin + ctti_skip_size_at_begin, + boost::mpl::bool_<ctti_skip_more_at_runtime>() + ); + } + +#if !defined(__clang__) && defined(__GNUC__) && !defined(BOOST_NO_CXX14_CONSTEXPR) + template <unsigned int... I> + struct index_seq {}; + + template <typename Left, typename Right> + struct make_index_sequence_join; + + template <unsigned int... Left, unsigned int... Right> + struct make_index_sequence_join<index_seq<Left...>, index_seq<Right...> > { + typedef index_seq<Left..., Right...> type; + }; + + template <unsigned int C, unsigned int D> + struct make_index_seq_impl { + typedef typename make_index_sequence_join< + typename make_index_seq_impl<C, D / 2>::type, + typename make_index_seq_impl<C + D / 2, (D + 1) / 2>::type + >::type type; + }; + + template <unsigned int C> + struct make_index_seq_impl<C, 0> { + typedef index_seq<> type; + }; + + template <unsigned int C> + struct make_index_seq_impl<C, 1> { + typedef index_seq<C> type; + }; + + template <char... C> + struct cstring { + static constexpr unsigned int size_ = sizeof...(C); + static constexpr char data_[size_] = { C... }; + }; + + template <char... C> + constexpr char cstring<C...>::data_[]; +#endif + +}}} // namespace boost::typeindex::detail + +namespace boost { namespace detail { + +/// Noncopyable type_info that does not require RTTI. +/// CTTI == Compile Time Type Info. +/// This name must be as short as possible, to avoid code bloat +template <class T> +struct ctti { + +#if !defined(__clang__) && defined(__GNUC__) && !defined(BOOST_NO_CXX14_CONSTEXPR) + //helper functions + template <unsigned int I> + constexpr static char s() BOOST_NOEXCEPT { // step + constexpr unsigned int offset = + (I >= 10u ? 1u : 0u) + + (I >= 100u ? 1u : 0u) + + (I >= 1000u ? 1u : 0u) + + (I >= 10000u ? 1u : 0u) + + (I >= 100000u ? 1u : 0u) + + (I >= 1000000u ? 1u : 0u) + ; + + #if defined(BOOST_TYPE_INDEX_FUNCTION_SIGNATURE) + return BOOST_TYPE_INDEX_FUNCTION_SIGNATURE[I + offset]; + #elif defined(__FUNCSIG__) + return __FUNCSIG__[I + offset]; + #else + return __PRETTY_FUNCTION__[I + offset]; + #endif + } + + template <unsigned int ...Indexes> + constexpr static const char* impl(::boost::typeindex::detail::index_seq<Indexes...> ) BOOST_NOEXCEPT { + return ::boost::typeindex::detail::cstring<s<Indexes>()...>::data_; + } + + template <unsigned int D = 0> // `D` means `Dummy` + constexpr static const char* n() BOOST_NOEXCEPT { + #if defined(BOOST_TYPE_INDEX_FUNCTION_SIGNATURE) + constexpr unsigned int size = sizeof(BOOST_TYPE_INDEX_FUNCTION_SIGNATURE); + #elif defined(__FUNCSIG__) + constexpr unsigned int size = sizeof(__FUNCSIG__); + #elif defined(__PRETTY_FUNCTION__) \ + || defined(__GNUC__) \ + || (defined(__SUNPRO_CC) && (__SUNPRO_CC >= 0x5130)) \ + || (defined(__MWERKS__) && (__MWERKS__ >= 0x3000)) \ + || (defined(__ICC) && (__ICC >= 600)) \ + || defined(__ghs__) \ + || defined(__DMC__) + constexpr unsigned int size = sizeof(__PRETTY_FUNCTION__); + #else + boost::typeindex::detail::failed_to_get_function_name(); + #endif + + boost::typeindex::detail::assert_compile_time_legths< + (size > boost::typeindex::detail::ctti_skip_size_at_begin + boost::typeindex::detail::ctti_skip_size_at_end + sizeof("const *") - 1) + >(); + static_assert(!boost::typeindex::detail::ctti_skip_more_at_runtime, "Skipping for GCC in C++14 mode is unsupported"); + + typedef typename boost::typeindex::detail::make_index_seq_impl< + boost::typeindex::detail::ctti_skip_size_at_begin, + size - sizeof("const *") + 1 - boost::typeindex::detail::ctti_skip_size_at_begin + >::type idx_seq; + return impl(idx_seq()); + } +#else + /// Returns raw name. Must be as short, as possible, to avoid code bloat + BOOST_CXX14_CONSTEXPR static const char* n() BOOST_NOEXCEPT { + #if defined(BOOST_TYPE_INDEX_FUNCTION_SIGNATURE) + return boost::typeindex::detail::skip_begining< sizeof(BOOST_TYPE_INDEX_FUNCTION_SIGNATURE) >(BOOST_TYPE_INDEX_FUNCTION_SIGNATURE); + #elif defined(__FUNCSIG__) + return boost::typeindex::detail::skip_begining< sizeof(__FUNCSIG__) >(__FUNCSIG__); + #elif defined(__PRETTY_FUNCTION__) \ + || defined(__GNUC__) \ + || (defined(__SUNPRO_CC) && (__SUNPRO_CC >= 0x5130)) \ + || (defined(__MWERKS__) && (__MWERKS__ >= 0x3000)) \ + || (defined(__ICC) && (__ICC >= 600)) \ + || defined(__ghs__) \ + || defined(__DMC__) + return boost::typeindex::detail::skip_begining< sizeof(__PRETTY_FUNCTION__) >(__PRETTY_FUNCTION__); + #else + boost::typeindex::detail::failed_to_get_function_name(); + return ""; + #endif + } +#endif +}; + +}} // namespace boost::detail + +#endif // BOOST_TYPE_INDEX_DETAIL_COMPILE_TIME_TYPE_INFO_HPP + |