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qicosmos
721 lines
18 KiB
C++
721 lines
18 KiB
C++
//
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// Copyright (c) 2016-2018 Martin Moene
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//
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// https://github.com/martinmoene/any-lite
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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.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#pragma once
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#ifndef NONSTD_ANY_LITE_HPP
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#define NONSTD_ANY_LITE_HPP
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#define any_lite_MAJOR 0
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#define any_lite_MINOR 4
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#define any_lite_PATCH 0
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#define any_lite_VERSION any_STRINGIFY(any_lite_MAJOR) "." any_STRINGIFY(any_lite_MINOR) "." any_STRINGIFY(any_lite_PATCH)
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#define any_STRINGIFY( x ) any_STRINGIFY_( x )
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#define any_STRINGIFY_( x ) #x
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// any-lite configuration:
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#define any_ANY_DEFAULT 0
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#define any_ANY_NONSTD 1
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#define any_ANY_STD 2
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// tweak header support:
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#ifdef __has_include
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# if __has_include(<nonstd/any.tweak.hpp>)
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# include <nonstd/any.tweak.hpp>
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# endif
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#define any_HAVE_TWEAK_HEADER 1
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#else
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#define any_HAVE_TWEAK_HEADER 0
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//# pragma message("any.hpp: Note: Tweak header not supported.")
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#endif
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// any selection and configuration:
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#if !defined( any_CONFIG_SELECT_ANY )
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# define any_CONFIG_SELECT_ANY ( any_HAVE_STD_ANY ? any_ANY_STD : any_ANY_NONSTD )
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#endif
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// Control presence of exception handling (try and auto discover):
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#ifndef any_CONFIG_NO_EXCEPTIONS
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# if _MSC_VER
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# include <cstddef> // for _HAS_EXCEPTIONS
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# endif
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# if defined(__cpp_exceptions) || defined(__EXCEPTIONS) || (_HAS_EXCEPTIONS)
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# define any_CONFIG_NO_EXCEPTIONS 0
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# else
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# define any_CONFIG_NO_EXCEPTIONS 1
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# endif
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#endif
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// C++ language version detection (C++20 is speculative):
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// Note: VC14.0/1900 (VS2015) lacks too much from C++14.
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#ifndef any_CPLUSPLUS
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# if defined(_MSVC_LANG ) && !defined(__clang__)
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# define any_CPLUSPLUS (_MSC_VER == 1900 ? 201103L : _MSVC_LANG )
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# else
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# define any_CPLUSPLUS __cplusplus
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# endif
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#endif
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#define any_CPP98_OR_GREATER ( any_CPLUSPLUS >= 199711L )
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#define any_CPP11_OR_GREATER ( any_CPLUSPLUS >= 201103L )
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#define any_CPP14_OR_GREATER ( any_CPLUSPLUS >= 201402L )
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#define any_CPP17_OR_GREATER ( any_CPLUSPLUS >= 201703L )
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#define any_CPP20_OR_GREATER ( any_CPLUSPLUS >= 202000L )
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// Use C++17 std::any if available and requested:
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#if any_CPP17_OR_GREATER && defined(__has_include )
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# if __has_include( <any> )
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# define any_HAVE_STD_ANY 1
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# else
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# define any_HAVE_STD_ANY 0
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# endif
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#else
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# define any_HAVE_STD_ANY 0
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#endif
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#define any_USES_STD_ANY ( (any_CONFIG_SELECT_ANY == any_ANY_STD) || ((any_CONFIG_SELECT_ANY == any_ANY_DEFAULT) && any_HAVE_STD_ANY) )
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//
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// in_place: code duplicated in any-lite, expected-lite, optional-lite, value-ptr-lite, variant-lite:
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//
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#ifndef nonstd_lite_HAVE_IN_PLACE_TYPES
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#define nonstd_lite_HAVE_IN_PLACE_TYPES 1
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// C++17 std::in_place in <utility>:
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#if any_CPP17_OR_GREATER
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#include <utility>
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namespace nonstd {
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using std::in_place;
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using std::in_place_type;
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using std::in_place_index;
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using std::in_place_t;
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using std::in_place_type_t;
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using std::in_place_index_t;
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#define nonstd_lite_in_place_t( T) std::in_place_t
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#define nonstd_lite_in_place_type_t( T) std::in_place_type_t<T>
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#define nonstd_lite_in_place_index_t(K) std::in_place_index_t<K>
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#define nonstd_lite_in_place( T) std::in_place_t{}
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#define nonstd_lite_in_place_type( T) std::in_place_type_t<T>{}
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#define nonstd_lite_in_place_index(K) std::in_place_index_t<K>{}
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} // namespace nonstd
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#else // any_CPP17_OR_GREATER
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#include <cstddef>
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namespace nonstd {
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namespace detail {
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template< class T >
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struct in_place_type_tag {};
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template< std::size_t K >
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struct in_place_index_tag {};
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} // namespace detail
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struct in_place_t {};
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template< class T >
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inline in_place_t in_place(detail::in_place_type_tag<T> = detail::in_place_type_tag<T>())
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{
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return in_place_t();
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}
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template< std::size_t K >
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inline in_place_t in_place(detail::in_place_index_tag<K> = detail::in_place_index_tag<K>())
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{
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return in_place_t();
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}
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template< class T >
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inline in_place_t in_place_type(detail::in_place_type_tag<T> = detail::in_place_type_tag<T>())
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{
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return in_place_t();
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}
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template< std::size_t K >
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inline in_place_t in_place_index(detail::in_place_index_tag<K> = detail::in_place_index_tag<K>())
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{
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return in_place_t();
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}
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// mimic templated typedef:
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#define nonstd_lite_in_place_t( T) nonstd::in_place_t(&)( nonstd::detail::in_place_type_tag<T> )
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#define nonstd_lite_in_place_type_t( T) nonstd::in_place_t(&)( nonstd::detail::in_place_type_tag<T> )
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#define nonstd_lite_in_place_index_t(K) nonstd::in_place_t(&)( nonstd::detail::in_place_index_tag<K> )
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#define nonstd_lite_in_place( T) nonstd::in_place_type<T>
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#define nonstd_lite_in_place_type( T) nonstd::in_place_type<T>
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#define nonstd_lite_in_place_index(K) nonstd::in_place_index<K>
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} // namespace nonstd
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#endif // any_CPP17_OR_GREATER
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#endif // nonstd_lite_HAVE_IN_PLACE_TYPES
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//
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// Using std::any:
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//
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#if any_USES_STD_ANY
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#include <any>
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#include <utility>
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namespace nonstd {
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using std::any;
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using std::any_cast;
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using std::make_any;
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using std::swap;
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using std::bad_any_cast;
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}
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#else // any_USES_STD_ANY
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#include <utility>
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// Compiler versions:
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//
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// MSVC++ 6.0 _MSC_VER == 1200 any_COMPILER_MSVC_VERSION == 60 (Visual Studio 6.0)
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// MSVC++ 7.0 _MSC_VER == 1300 any_COMPILER_MSVC_VERSION == 70 (Visual Studio .NET 2002)
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// MSVC++ 7.1 _MSC_VER == 1310 any_COMPILER_MSVC_VERSION == 71 (Visual Studio .NET 2003)
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// MSVC++ 8.0 _MSC_VER == 1400 any_COMPILER_MSVC_VERSION == 80 (Visual Studio 2005)
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// MSVC++ 9.0 _MSC_VER == 1500 any_COMPILER_MSVC_VERSION == 90 (Visual Studio 2008)
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// MSVC++ 10.0 _MSC_VER == 1600 any_COMPILER_MSVC_VERSION == 100 (Visual Studio 2010)
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// MSVC++ 11.0 _MSC_VER == 1700 any_COMPILER_MSVC_VERSION == 110 (Visual Studio 2012)
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// MSVC++ 12.0 _MSC_VER == 1800 any_COMPILER_MSVC_VERSION == 120 (Visual Studio 2013)
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// MSVC++ 14.0 _MSC_VER == 1900 any_COMPILER_MSVC_VERSION == 140 (Visual Studio 2015)
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// MSVC++ 14.1 _MSC_VER >= 1910 any_COMPILER_MSVC_VERSION == 141 (Visual Studio 2017)
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// MSVC++ 14.2 _MSC_VER >= 1920 any_COMPILER_MSVC_VERSION == 142 (Visual Studio 2019)
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#if defined(_MSC_VER ) && !defined(__clang__)
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# define any_COMPILER_MSVC_VER (_MSC_VER )
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# define any_COMPILER_MSVC_VERSION (_MSC_VER / 10 - 10 * ( 5 + (_MSC_VER < 1900 ) ) )
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#else
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# define any_COMPILER_MSVC_VER 0
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# define any_COMPILER_MSVC_VERSION 0
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#endif
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#define any_COMPILER_VERSION( major, minor, patch ) ( 10 * ( 10 * (major) + (minor) ) + (patch) )
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#if defined(__clang__)
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# define any_COMPILER_CLANG_VERSION any_COMPILER_VERSION(__clang_major__, __clang_minor__, __clang_patchlevel__)
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#else
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# define any_COMPILER_CLANG_VERSION 0
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#endif
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#if defined(__GNUC__) && !defined(__clang__)
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# define any_COMPILER_GNUC_VERSION any_COMPILER_VERSION(__GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__)
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#else
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# define any_COMPILER_GNUC_VERSION 0
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#endif
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// half-open range [lo..hi):
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//#define any_BETWEEN( v, lo, hi ) ( (lo) <= (v) && (v) < (hi) )
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// Presence of language and library features:
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#define any_HAVE( feature ) ( any_HAVE_##feature )
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#ifdef _HAS_CPP0X
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# define any_HAS_CPP0X _HAS_CPP0X
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#else
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# define any_HAS_CPP0X 0
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#endif
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#define any_CPP11_90 (any_CPP11_OR_GREATER || any_COMPILER_MSVC_VER >= 1500)
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#define any_CPP11_100 (any_CPP11_OR_GREATER || any_COMPILER_MSVC_VER >= 1600)
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#define any_CPP11_120 (any_CPP11_OR_GREATER || any_COMPILER_MSVC_VER >= 1800)
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#define any_CPP11_140 (any_CPP11_OR_GREATER || any_COMPILER_MSVC_VER >= 1900)
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#define any_CPP14_000 (any_CPP14_OR_GREATER)
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#define any_CPP17_000 (any_CPP17_OR_GREATER)
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// Presence of C++11 language features:
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#define any_HAVE_CONSTEXPR_11 any_CPP11_140
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#define any_HAVE_DEFAULT_FUNCTION_TEMPLATE_ARG \
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any_CPP11_120
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#define any_HAVE_INITIALIZER_LIST any_CPP11_120
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#define any_HAVE_NOEXCEPT any_CPP11_140
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#define any_HAVE_NULLPTR any_CPP11_100
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#define any_HAVE_TYPE_TRAITS any_CPP11_90
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#define any_HAVE_STATIC_ASSERT any_CPP11_100
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#define any_HAVE_ADD_CONST any_CPP11_90
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#define any_HAVE_REMOVE_REFERENCE any_CPP11_90
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#define any_HAVE_TR1_ADD_CONST (!! any_COMPILER_GNUC_VERSION )
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#define any_HAVE_TR1_REMOVE_REFERENCE (!! any_COMPILER_GNUC_VERSION )
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#define any_HAVE_TR1_TYPE_TRAITS (!! any_COMPILER_GNUC_VERSION )
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// Presence of C++14 language features:
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#define any_HAVE_CONSTEXPR_14 any_CPP14_000
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// Presence of C++17 language features:
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#define any_HAVE_NODISCARD any_CPP17_000
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// Presence of C++ language features:
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#if any_HAVE_CONSTEXPR_11
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# define any_constexpr constexpr
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#else
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# define any_constexpr /*constexpr*/
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#endif
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#if any_HAVE_CONSTEXPR_14
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# define any_constexpr14 constexpr
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#else
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# define any_constexpr14 /*constexpr*/
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#endif
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#if any_HAVE_NOEXCEPT
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# define any_noexcept noexcept
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#else
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# define any_noexcept /*noexcept*/
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#endif
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#if any_HAVE_NULLPTR
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# define any_nullptr nullptr
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#else
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# define any_nullptr NULL
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#endif
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#if any_HAVE_NODISCARD
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# define any_nodiscard [[nodiscard]]
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#else
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# define any_nodiscard /*[[nodiscard]]*/
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#endif
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// additional includes:
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#if any_CONFIG_NO_EXCEPTIONS
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# include <cassert>
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#else
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# include <typeinfo>
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#endif
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#if ! any_HAVE_NULLPTR
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# include <cstddef>
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#endif
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#if any_HAVE_INITIALIZER_LIST
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# include <initializer_list>
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#endif
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#if any_HAVE_TYPE_TRAITS
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# include <type_traits>
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#elif any_HAVE_TR1_TYPE_TRAITS
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# include <tr1/type_traits>
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#endif
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// Method enabling
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#if any_CPP11_OR_GREATER
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#define any_REQUIRES_0(...) \
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template< bool B = (__VA_ARGS__), typename std::enable_if<B, int>::type = 0 >
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#define any_REQUIRES_T(...) \
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, typename std::enable_if< (__VA_ARGS__), int >::type = 0
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#define any_REQUIRES_R(R, ...) \
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typename std::enable_if<__VA_ARGS__, R>::type
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#define any_REQUIRES_A(...) \
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, typename std::enable_if<__VA_ARGS__, void*>::type = nullptr
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#endif
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//
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// any:
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//
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namespace nonstd {
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namespace any_lite {
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// C++11 emulation:
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namespace std11 {
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#if any_HAVE_ADD_CONST
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using std::add_const;
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#elif any_HAVE_TR1_ADD_CONST
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using std::tr1::add_const;
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#else
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template< class T > struct add_const { typedef const T type; };
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#endif // any_HAVE_ADD_CONST
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#if any_HAVE_REMOVE_REFERENCE
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using std::remove_reference;
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#elif any_HAVE_TR1_REMOVE_REFERENCE
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using std::tr1::remove_reference;
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#else
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template< class T > struct remove_reference { typedef T type; };
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template< class T > struct remove_reference<T&> { typedef T type; };
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#endif // any_HAVE_REMOVE_REFERENCE
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} // namespace std11
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namespace detail {
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// for any_REQUIRES_T
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/*enum*/ class enabler {};
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} // namespace detail
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#if ! any_CONFIG_NO_EXCEPTIONS
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class bad_any_cast : public std::bad_cast
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{
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public:
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#if any_CPP11_OR_GREATER
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virtual const char* what() const any_noexcept
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#else
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virtual const char* what() const throw()
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#endif
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{
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return "any-lite: bad any_cast";
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}
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};
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#endif // any_CONFIG_NO_EXCEPTIONS
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class any
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{
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public:
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any_constexpr any() any_noexcept
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: content(any_nullptr)
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{}
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any(any const& other)
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: content(other.content ? other.content->clone() : any_nullptr)
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{}
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#if any_CPP11_OR_GREATER
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any(any&& other) any_noexcept
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: content(std::move(other.content))
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{
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other.content = any_nullptr;
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}
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template<
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class ValueType, class T = typename std::decay<ValueType>::type
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any_REQUIRES_T(!std::is_same<T, any>::value)
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>
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any(ValueType&& value) any_noexcept
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: content(new holder<T>(std::forward<ValueType>(value)))
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{}
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template<
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class T, class... Args
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any_REQUIRES_T(std::is_constructible<T, Args&&...>::value)
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>
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explicit any(nonstd_lite_in_place_type_t(T), Args&&... args)
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: content(new holder<T>(T(std::forward<Args>(args)...)))
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{}
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template<
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class T, class U, class... Args
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any_REQUIRES_T(std::is_constructible<T, std::initializer_list<U>&, Args&&...>::value)
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>
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explicit any(nonstd_lite_in_place_type_t(T), std::initializer_list<U> il, Args&&... args)
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: content(new holder<T>(T(il, std::forward<Args>(args)...)))
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{}
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#else
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template< class ValueType >
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any(ValueType const& value)
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: content(new holder<ValueType>(value))
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{}
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#endif // any_CPP11_OR_GREATER
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~any()
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{
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reset();
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}
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any& operator=(any const& other)
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{
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any(other).swap(*this);
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return *this;
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}
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#if any_CPP11_OR_GREATER
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any& operator=(any&& other) any_noexcept
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{
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any(std::move(other)).swap(*this);
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return *this;
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}
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template<
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class ValueType, class T = typename std::decay<ValueType>::type
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any_REQUIRES_T(!std::is_same<T, any>::value)
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>
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any& operator=(T&& value)
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{
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any(std::move(value)).swap(*this);
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return *this;
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}
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template< class T, class... Args >
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void emplace(Args && ... args)
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{
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any(T(std::forward<Args>(args)...)).swap(*this);
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}
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template<
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class T, class U, class... Args
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any_REQUIRES_T(std::is_constructible<T, std::initializer_list<U>&, Args&&...>::value)
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>
|
|
void emplace(std::initializer_list<U> il, Args&&... args)
|
|
{
|
|
any(T(il, std::forward<Args>(args)...)).swap(*this);
|
|
}
|
|
|
|
#else
|
|
|
|
template< class ValueType >
|
|
any& operator=(ValueType const& value)
|
|
{
|
|
any(value).swap(*this);
|
|
return *this;
|
|
}
|
|
|
|
#endif // any_CPP11_OR_GREATER
|
|
|
|
void reset() any_noexcept
|
|
{
|
|
delete content; content = any_nullptr;
|
|
}
|
|
|
|
void swap(any& other) any_noexcept
|
|
{
|
|
std::swap(content, other.content);
|
|
}
|
|
|
|
bool has_value() const any_noexcept
|
|
{
|
|
return content != any_nullptr;
|
|
}
|
|
|
|
const std::type_info& type() const any_noexcept
|
|
{
|
|
return has_value() ? content->type() : typeid(void);
|
|
}
|
|
|
|
//
|
|
// non-standard:
|
|
//
|
|
|
|
template< class ValueType >
|
|
const ValueType* to_ptr() const
|
|
{
|
|
return &(static_cast<holder<ValueType> *>(content)->held);
|
|
}
|
|
|
|
template< class ValueType >
|
|
ValueType* to_ptr()
|
|
{
|
|
return &(static_cast<holder<ValueType> *>(content)->held);
|
|
}
|
|
|
|
private:
|
|
class placeholder
|
|
{
|
|
public:
|
|
virtual ~placeholder()
|
|
{
|
|
}
|
|
|
|
virtual std::type_info const& type() const = 0;
|
|
|
|
virtual placeholder* clone() const = 0;
|
|
};
|
|
|
|
template< typename ValueType >
|
|
class holder : public placeholder
|
|
{
|
|
public:
|
|
holder(ValueType const& value)
|
|
: held(value)
|
|
{}
|
|
|
|
#if any_CPP11_OR_GREATER
|
|
holder(ValueType&& value)
|
|
: held(std::move(value))
|
|
{}
|
|
#endif
|
|
|
|
virtual std::type_info const& type() const
|
|
{
|
|
return typeid(ValueType);
|
|
}
|
|
|
|
virtual placeholder* clone() const
|
|
{
|
|
return new holder(held);
|
|
}
|
|
|
|
ValueType held;
|
|
};
|
|
|
|
placeholder* content;
|
|
};
|
|
|
|
inline void swap(any& x, any& y) any_noexcept
|
|
{
|
|
x.swap(y);
|
|
}
|
|
|
|
#if any_CPP11_OR_GREATER
|
|
|
|
template< class T, class ...Args >
|
|
inline any make_any(Args&& ...args)
|
|
{
|
|
return any(nonstd_lite_in_place_type(T), std::forward<Args>(args)...);
|
|
}
|
|
|
|
template< class T, class U, class ...Args >
|
|
inline any make_any(std::initializer_list<U> il, Args&& ...args)
|
|
{
|
|
return any(nonstd_lite_in_place_type(T), il, std::forward<Args>(args)...);
|
|
}
|
|
|
|
#endif // any_CPP11_OR_GREATER
|
|
|
|
template<
|
|
class ValueType
|
|
#if any_HAVE_DEFAULT_FUNCTION_TEMPLATE_ARG
|
|
// any_REQUIRES_T(...) Allow for VC120 (VS2013):
|
|
, typename = typename std::enable_if< (std::is_reference<ValueType>::value || std::is_copy_constructible<ValueType>::value), nonstd::any_lite::detail::enabler >::type
|
|
#endif
|
|
>
|
|
any_nodiscard inline ValueType any_cast(any const& operand)
|
|
{
|
|
const ValueType* result = any_cast<typename std11::add_const< typename std11::remove_reference<ValueType>::type >::type>(&operand);
|
|
|
|
#if any_CONFIG_NO_EXCEPTIONS
|
|
assert(result);
|
|
#else
|
|
if (!result)
|
|
{
|
|
throw bad_any_cast();
|
|
}
|
|
#endif
|
|
|
|
return *result;
|
|
}
|
|
|
|
template<
|
|
class ValueType
|
|
#if any_HAVE_DEFAULT_FUNCTION_TEMPLATE_ARG
|
|
// any_REQUIRES_T(...) Allow for VC120 (VS2013):
|
|
, typename = typename std::enable_if< (std::is_reference<ValueType>::value || std::is_copy_constructible<ValueType>::value), nonstd::any_lite::detail::enabler >::type
|
|
#endif
|
|
>
|
|
any_nodiscard inline ValueType any_cast(any& operand)
|
|
{
|
|
const ValueType* result = any_cast<typename std11::remove_reference<ValueType>::type>(&operand);
|
|
|
|
#if any_CONFIG_NO_EXCEPTIONS
|
|
assert(result);
|
|
#else
|
|
if (!result)
|
|
{
|
|
throw bad_any_cast();
|
|
}
|
|
#endif
|
|
|
|
return *result;
|
|
}
|
|
|
|
#if any_CPP11_OR_GREATER
|
|
|
|
template<
|
|
class ValueType
|
|
#if any_HAVE_DEFAULT_FUNCTION_TEMPLATE_ARG
|
|
any_REQUIRES_T(std::is_reference<ValueType>::value || std::is_copy_constructible<ValueType>::value)
|
|
#endif
|
|
>
|
|
any_nodiscard inline ValueType any_cast(any&& operand)
|
|
{
|
|
const ValueType* result = any_cast<typename std11::remove_reference<ValueType>::type>(&operand);
|
|
|
|
#if any_CONFIG_NO_EXCEPTIONS
|
|
assert(result);
|
|
#else
|
|
if (!result)
|
|
{
|
|
throw bad_any_cast();
|
|
}
|
|
#endif
|
|
|
|
return *result;
|
|
}
|
|
|
|
#endif // any_CPP11_OR_GREATER
|
|
|
|
template< class ValueType >
|
|
any_nodiscard inline ValueType const* any_cast(any const* operand) any_noexcept
|
|
{
|
|
return operand != any_nullptr && operand->type() == typeid(ValueType) ? operand->to_ptr<ValueType>() : any_nullptr;
|
|
}
|
|
|
|
template<class ValueType >
|
|
any_nodiscard inline ValueType* any_cast(any* operand) any_noexcept
|
|
{
|
|
return operand != any_nullptr && operand->type() == typeid(ValueType) ? operand->to_ptr<ValueType>() : any_nullptr;
|
|
}
|
|
|
|
} // namespace any_lite
|
|
|
|
using namespace any_lite;
|
|
|
|
} // namespace nonstd
|
|
|
|
#endif // any_USES_STD_ANY
|
|
|
|
#endif // NONSTD_ANY_LITE_HPP
|