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Diffstat (limited to '3rdParty/Boost/src/boost/detail/scoped_enum_emulation.hpp')
| -rw-r--r-- | 3rdParty/Boost/src/boost/detail/scoped_enum_emulation.hpp | 340 |
1 files changed, 10 insertions, 330 deletions
diff --git a/3rdParty/Boost/src/boost/detail/scoped_enum_emulation.hpp b/3rdParty/Boost/src/boost/detail/scoped_enum_emulation.hpp index 80394cf..1c7bc23 100644 --- a/3rdParty/Boost/src/boost/detail/scoped_enum_emulation.hpp +++ b/3rdParty/Boost/src/boost/detail/scoped_enum_emulation.hpp @@ -1,337 +1,17 @@ -// scoped_enum_emulation.hpp ---------------------------------------------------------// - -// Copyright Beman Dawes, 2009 -// Copyright (C) 2011-2012 Vicente J. Botet Escriba -// Copyright (C) 2012 Anthony Williams - -// Distributed under the Boost Software License, Version 1.0. -// See http://www.boost.org/LICENSE_1_0.txt - /* -[section:scoped_enums Scoped Enums] - -Generates C++0x scoped enums if the feature is present, otherwise emulates C++0x -scoped enums with C++03 namespaces and enums. The Boost.Config BOOST_NO_SCOPED_ENUMS -macro is used to detect feature support. - -See http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2347.pdf for a -description of the scoped enum feature. Note that the committee changed the name -from strongly typed enum to scoped enum. - -Some of the enumerations defined in the standard library are scoped enums. - - enum class future_errc - { - broken_promise, - future_already_retrieved, - promise_already_satisfied, - no_state - }; - -On compilers that don't support them, the library provides two emulations: - -[heading Strict] - -* Able to specify the underlying type. -* explicit conversion to/from underlying type. -* The wrapper is not a C++03 enum type. - -The user can declare declare these types as - - BOOST_SCOPED_ENUM_DECLARE_BEGIN(future_errc) - { - broken_promise, - future_already_retrieved, - promise_already_satisfied, - no_state - } - BOOST_SCOPED_ENUM_DECLARE_END(future_errc) - -These macros allows to use 'future_errc' in almost all the cases as an scoped enum. - - future_errc err = future_errc::no_state; - -There are however some limitations: - -* The type is not a C++ enum, so 'is_enum<future_errc>' will be false_type. -* The emulated scoped enum can not be used in switch nor in template arguments. For these cases the user needs to use some macros. - -Instead of - - switch (ev) - { - case future_errc::broken_promise: - // ... - -use - - switch (boost::native_value(ev)) - { - case future_errc::broken_promise: - -And instead of - - #ifdef BOOST_NO_SCOPED_ENUMS - template <> - struct BOOST_SYMBOL_VISIBLE is_error_code_enum<future_errc> : public true_type { }; - #endif - -use - - #ifdef BOOST_NO_SCOPED_ENUMS - template <> - struct BOOST_SYMBOL_VISIBLE is_error_code_enum<future_errc::enum_type > : public true_type { }; - #endif - - -Sample usage: - - BOOST_SCOPED_ENUM_UT_DECLARE_BEGIN(algae, char) { green, red, cyan }; BOOST_SCOPED_ENUM_DECLARE_END(algae) - ... - algae sample( algae::red ); - void foo( algae color ); - ... - sample = algae::green; - foo( algae::cyan ); - - Light - Caution: only the syntax is emulated; the semantics are not emulated and - the syntax emulation doesn't include being able to specify the underlying - representation type. - - The literal scoped emulation is via struct rather than namespace to allow use within classes. - Thanks to Andrey Semashev for pointing that out. - However the type is an real C++03 enum and so convertible implicitly to an int. - - Sample usage: - - BOOST_SCOPED_ENUM_START(algae) { green, red, cyan }; BOOST_SCOPED_ENUM_END - ... - BOOST_SCOPED_ENUM(algae) sample( algae::red ); - void foo( BOOST_SCOPED_ENUM(algae) color ); - ... - sample = algae::green; - foo( algae::cyan ); - - Helpful comments and suggestions were also made by Kjell Elster, Phil Endecott, - Joel Falcou, Mathias Gaunard, Felipe Magno de Almeida, Matt Calabrese, Vicente - Botet, and Daniel James. - -[endsect] -*/ - - -#ifndef BOOST_SCOPED_ENUM_EMULATION_HPP -#define BOOST_SCOPED_ENUM_EMULATION_HPP - -#include <boost/config.hpp> -#include <boost/detail/workaround.hpp> - -namespace boost -{ - -#ifdef BOOST_NO_SCOPED_ENUMS - /** - * Meta-function to get the underlying type of a scoped enum. - * - * Requires EnumType must be an enum type or the emulation of a scoped enum - */ - template <typename EnumType> - struct underlying_type - { - /** - * The member typedef type names the underlying type of EnumType. It is EnumType::underlying_type when the EnumType is an emulated scoped enum, - * std::underlying_type<EnumType>::type when the standard library std::underlying_type is provided. - * - * The user will need to specialize it when the compiler supports scoped enums but don't provides std::underlying_type. - */ - typedef typename EnumType::underlying_type type; - }; - - /** - * Meta-function to get the native enum type associated to an enum class or its emulation. - */ - template <typename EnumType> - struct native_type - { - /** - * The member typedef type names the native enum type associated to the scoped enum, - * which is it self if the compiler supports scoped enums or EnumType::enum_type if it is an emulated scoped enum. - */ - typedef typename EnumType::enum_type type; - }; - - /** - * Casts a scoped enum to its underlying type. - * - * This function is useful when working with scoped enum classes, which doens't implicitly convert to the underlying type. - * @param v A scoped enum. - * @returns The underlying type. - * @throws No-throws. - */ - template <typename UnderlyingType, typename EnumType> - UnderlyingType underlying_cast(EnumType v) - { - return v.get_underlying_value_(); - } - - /** - * Casts a scoped enum to its native enum type. - * - * This function is useful to make programs portable when the scoped enum emulation can not be use where native enums can. - * - * EnumType the scoped enum type - * - * @param v A scoped enum. - * @returns The native enum value. - * @throws No-throws. - */ - template <typename EnumType> - inline - typename EnumType::enum_type native_value(EnumType e) - { - return e.native_value_(); - } - -#else // BOOST_NO_SCOPED_ENUMS - - template <typename EnumType> - struct underlying_type - { - //typedef typename std::underlying_type<EnumType>::type type; - }; - - template <typename EnumType> - struct native_type - { - typedef EnumType type; - }; - - template <typename UnderlyingType, typename EnumType> - UnderlyingType underlying_cast(EnumType v) - { - return static_cast<UnderlyingType>(v); - } - - template <typename EnumType> - inline - EnumType native_value(EnumType e) - { - return e; - } - -#endif -} - - -#ifdef BOOST_NO_SCOPED_ENUMS - -#ifndef BOOST_NO_EXPLICIT_CONVERSION_OPERATORS - -#define BOOST_SCOPED_ENUM_UT_DECLARE_CONVERSION_OPERATOR \ - explicit operator underlying_type() const { return get_underlying_value_(); } - -#else - -#define BOOST_SCOPED_ENUM_UT_DECLARE_CONVERSION_OPERATOR - -#endif - -/** - * Start a declaration of a scoped enum. + * Copyright (c) 2014 Andrey Semashev * - * @param EnumType The new scoped enum. - * @param UnderlyingType The underlying type. + * 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) */ -#define BOOST_SCOPED_ENUM_UT_DECLARE_BEGIN(EnumType, UnderlyingType) \ - struct EnumType { \ - typedef UnderlyingType underlying_type; \ - EnumType() BOOST_NOEXCEPT {} \ - explicit EnumType(underlying_type v) : v_(v) {} \ - underlying_type get_underlying_value_() const { return v_; } \ - BOOST_SCOPED_ENUM_UT_DECLARE_CONVERSION_OPERATOR \ - private: \ - underlying_type v_; \ - typedef EnumType self_type; \ - public: \ - enum enum_type -#define BOOST_SCOPED_ENUM_DECLARE_END2() \ - enum_type get_native_value_() const BOOST_NOEXCEPT { return enum_type(v_); } \ - operator enum_type() const BOOST_NOEXCEPT { return get_native_value_(); } \ - friend bool operator ==(self_type lhs, self_type rhs) BOOST_NOEXCEPT { return enum_type(lhs.v_)==enum_type(rhs.v_); } \ - friend bool operator ==(self_type lhs, enum_type rhs) BOOST_NOEXCEPT { return enum_type(lhs.v_)==rhs; } \ - friend bool operator ==(enum_type lhs, self_type rhs) BOOST_NOEXCEPT { return lhs==enum_type(rhs.v_); } \ - friend bool operator !=(self_type lhs, self_type rhs) BOOST_NOEXCEPT { return enum_type(lhs.v_)!=enum_type(rhs.v_); } \ - friend bool operator !=(self_type lhs, enum_type rhs) BOOST_NOEXCEPT { return enum_type(lhs.v_)!=rhs; } \ - friend bool operator !=(enum_type lhs, self_type rhs) BOOST_NOEXCEPT { return lhs!=enum_type(rhs.v_); } \ - friend bool operator <(self_type lhs, self_type rhs) BOOST_NOEXCEPT { return enum_type(lhs.v_)<enum_type(rhs.v_); } \ - friend bool operator <(self_type lhs, enum_type rhs) BOOST_NOEXCEPT { return enum_type(lhs.v_)<rhs; } \ - friend bool operator <(enum_type lhs, self_type rhs) BOOST_NOEXCEPT { return lhs<enum_type(rhs.v_); } \ - friend bool operator <=(self_type lhs, self_type rhs) BOOST_NOEXCEPT { return enum_type(lhs.v_)<=enum_type(rhs.v_); } \ - friend bool operator <=(self_type lhs, enum_type rhs) BOOST_NOEXCEPT { return enum_type(lhs.v_)<=rhs; } \ - friend bool operator <=(enum_type lhs, self_type rhs) BOOST_NOEXCEPT { return lhs<=enum_type(rhs.v_); } \ - friend bool operator >(self_type lhs, self_type rhs) BOOST_NOEXCEPT { return enum_type(lhs.v_)>enum_type(rhs.v_); } \ - friend bool operator >(self_type lhs, enum_type rhs) BOOST_NOEXCEPT { return enum_type(lhs.v_)>rhs; } \ - friend bool operator >(enum_type lhs, self_type rhs) BOOST_NOEXCEPT { return lhs>enum_type(rhs.v_); } \ - friend bool operator >=(self_type lhs, self_type rhs) BOOST_NOEXCEPT { return enum_type(lhs.v_)>=enum_type(rhs.v_); } \ - friend bool operator >=(self_type lhs, enum_type rhs) BOOST_NOEXCEPT { return enum_type(lhs.v_)>=rhs; } \ - friend bool operator >=(enum_type lhs, self_type rhs) BOOST_NOEXCEPT { return lhs>=enum_type(rhs.v_); } \ - }; +#ifndef BOOST_DETAIL_SCOPED_ENUM_EMULATION_HPP +#define BOOST_DETAIL_SCOPED_ENUM_EMULATION_HPP -#define BOOST_SCOPED_ENUM_DECLARE_END(EnumType) \ - ; \ - EnumType(enum_type v) BOOST_NOEXCEPT : v_(v) {} \ - BOOST_SCOPED_ENUM_DECLARE_END2() +// The header file at this path is deprecated; +// use boost/core/scoped_enum.hpp instead. -/** - * Starts a declaration of a scoped enum with the default int underlying type. - * - * @param EnumType The new scoped enum. - */ -#define BOOST_SCOPED_ENUM_DECLARE_BEGIN(EnumType) \ - BOOST_SCOPED_ENUM_UT_DECLARE_BEGIN(EnumType,int) +#include <boost/core/scoped_enum.hpp> -/** - * Name of the native enum type. - * - * @param NT The new scoped enum. - */ -#define BOOST_SCOPED_ENUM_NATIVE(EnumType) EnumType::enum_type -/** - * Forward declares an scoped enum. - * - * @param NT The scoped enum. - */ -#define BOOST_SCOPED_ENUM_FORWARD_DECLARE(EnumType) struct EnumType - -#else // BOOST_NO_SCOPED_ENUMS - -#define BOOST_SCOPED_ENUM_UT_DECLARE_BEGIN(EnumType,UnderlyingType) enum class EnumType:UnderlyingType -#define BOOST_SCOPED_ENUM_DECLARE_BEGIN(EnumType) enum class EnumType -#define BOOST_SCOPED_ENUM_DECLARE_END2() -#define BOOST_SCOPED_ENUM_DECLARE_END(EnumType) ; - -#define BOOST_SCOPED_ENUM_NATIVE(EnumType) EnumType -#define BOOST_SCOPED_ENUM_FORWARD_DECLARE(EnumType) enum class EnumType - -#endif // BOOST_NO_SCOPED_ENUMS - -#define BOOST_SCOPED_ENUM_START(name) BOOST_SCOPED_ENUM_DECLARE_BEGIN(name) -#define BOOST_SCOPED_ENUM_END BOOST_SCOPED_ENUM_DECLARE_END2() -#define BOOST_SCOPED_ENUM(name) BOOST_SCOPED_ENUM_NATIVE(name) - -//#ifdef BOOST_NO_SCOPED_ENUMS -// -//# define BOOST_SCOPED_ENUM_START(name) struct name { enum enum_type -//# define BOOST_SCOPED_ENUM_END }; -//# define BOOST_SCOPED_ENUM(name) name::enum_type -// -//#else -// -//# define BOOST_SCOPED_ENUM_START(name) enum class name -//# define BOOST_SCOPED_ENUM_END -//# define BOOST_SCOPED_ENUM(name) name -// -//#endif -#endif // BOOST_SCOPED_ENUM_EMULATION_HPP +#endif |