mirror of
https://github.com/ecency/ecency-mobile.git
synced 2024-12-23 21:35:04 +03:00
586 lines
16 KiB
C++
586 lines
16 KiB
C++
//////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// (C) Copyright Ion Gaztanaga 2012-2015.
|
|
// 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)
|
|
//
|
|
// See http://www.boost.org/libs/move for documentation.
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
//! \file
|
|
|
|
#ifndef BOOST_MOVE_DETAIL_META_UTILS_HPP
|
|
#define BOOST_MOVE_DETAIL_META_UTILS_HPP
|
|
|
|
#if defined(BOOST_HAS_PRAGMA_ONCE)
|
|
# pragma once
|
|
#endif
|
|
#include <boost/move/detail/config_begin.hpp>
|
|
#include <boost/move/detail/workaround.hpp> //forceinline
|
|
#include <boost/move/detail/meta_utils_core.hpp>
|
|
#include <cstddef> //for std::size_t
|
|
|
|
//Small meta-typetraits to support move
|
|
|
|
namespace boost {
|
|
|
|
//Forward declare boost::rv
|
|
template <class T> class rv;
|
|
|
|
namespace move_detail {
|
|
|
|
//////////////////////////////////////
|
|
// is_different
|
|
//////////////////////////////////////
|
|
template<class T, class U>
|
|
struct is_different
|
|
{
|
|
static const bool value = !is_same<T, U>::value;
|
|
};
|
|
|
|
//////////////////////////////////////
|
|
// apply
|
|
//////////////////////////////////////
|
|
template<class F, class Param>
|
|
struct apply
|
|
{
|
|
typedef typename F::template apply<Param>::type type;
|
|
};
|
|
|
|
//////////////////////////////////////
|
|
// bool_
|
|
//////////////////////////////////////
|
|
|
|
template< bool C_ >
|
|
struct bool_ : integral_constant<bool, C_>
|
|
{
|
|
operator bool() const { return C_; }
|
|
bool operator()() const { return C_; }
|
|
};
|
|
|
|
typedef bool_<true> true_;
|
|
typedef bool_<false> false_;
|
|
|
|
//////////////////////////////////////
|
|
// nat
|
|
//////////////////////////////////////
|
|
struct nat{};
|
|
|
|
//////////////////////////////////////
|
|
// yes_type/no_type
|
|
//////////////////////////////////////
|
|
typedef char yes_type;
|
|
|
|
struct no_type
|
|
{
|
|
char _[2];
|
|
};
|
|
|
|
//////////////////////////////////////
|
|
// natify
|
|
//////////////////////////////////////
|
|
template <class T> struct natify{};
|
|
|
|
//////////////////////////////////////
|
|
// remove_reference
|
|
//////////////////////////////////////
|
|
template<class T>
|
|
struct remove_reference
|
|
{
|
|
typedef T type;
|
|
};
|
|
|
|
template<class T>
|
|
struct remove_reference<T&>
|
|
{
|
|
typedef T type;
|
|
};
|
|
|
|
#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
|
|
|
|
template<class T>
|
|
struct remove_reference<T&&>
|
|
{
|
|
typedef T type;
|
|
};
|
|
|
|
#else
|
|
|
|
template<class T>
|
|
struct remove_reference< rv<T> >
|
|
{
|
|
typedef T type;
|
|
};
|
|
|
|
template<class T>
|
|
struct remove_reference< rv<T> &>
|
|
{
|
|
typedef T type;
|
|
};
|
|
|
|
template<class T>
|
|
struct remove_reference< const rv<T> &>
|
|
{
|
|
typedef T type;
|
|
};
|
|
|
|
#endif
|
|
|
|
//////////////////////////////////////
|
|
// remove_pointer
|
|
//////////////////////////////////////
|
|
|
|
template< class T > struct remove_pointer { typedef T type; };
|
|
template< class T > struct remove_pointer<T*> { typedef T type; };
|
|
template< class T > struct remove_pointer<T* const> { typedef T type; };
|
|
template< class T > struct remove_pointer<T* volatile> { typedef T type; };
|
|
template< class T > struct remove_pointer<T* const volatile> { typedef T type; };
|
|
|
|
//////////////////////////////////////
|
|
// add_pointer
|
|
//////////////////////////////////////
|
|
template< class T >
|
|
struct add_pointer
|
|
{
|
|
typedef typename remove_reference<T>::type* type;
|
|
};
|
|
|
|
//////////////////////////////////////
|
|
// add_const
|
|
//////////////////////////////////////
|
|
template<class T>
|
|
struct add_const
|
|
{
|
|
typedef const T type;
|
|
};
|
|
|
|
template<class T>
|
|
struct add_const<T&>
|
|
{
|
|
typedef const T& type;
|
|
};
|
|
|
|
#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
|
|
|
|
template<class T>
|
|
struct add_const<T&&>
|
|
{
|
|
typedef T&& type;
|
|
};
|
|
|
|
#endif
|
|
|
|
//////////////////////////////////////
|
|
// add_lvalue_reference
|
|
//////////////////////////////////////
|
|
template<class T>
|
|
struct add_lvalue_reference
|
|
{ typedef T& type; };
|
|
|
|
template<class T> struct add_lvalue_reference<T&> { typedef T& type; };
|
|
template<> struct add_lvalue_reference<void> { typedef void type; };
|
|
template<> struct add_lvalue_reference<const void> { typedef const void type; };
|
|
template<> struct add_lvalue_reference<volatile void> { typedef volatile void type; };
|
|
template<> struct add_lvalue_reference<const volatile void>{ typedef const volatile void type; };
|
|
|
|
template<class T>
|
|
struct add_const_lvalue_reference
|
|
{
|
|
typedef typename remove_reference<T>::type t_unreferenced;
|
|
typedef typename add_const<t_unreferenced>::type t_unreferenced_const;
|
|
typedef typename add_lvalue_reference
|
|
<t_unreferenced_const>::type type;
|
|
};
|
|
|
|
//////////////////////////////////////
|
|
// is_lvalue_reference
|
|
//////////////////////////////////////
|
|
template<class T>
|
|
struct is_lvalue_reference
|
|
{
|
|
static const bool value = false;
|
|
};
|
|
|
|
template<class T>
|
|
struct is_lvalue_reference<T&>
|
|
{
|
|
static const bool value = true;
|
|
};
|
|
|
|
|
|
//////////////////////////////////////
|
|
// identity
|
|
//////////////////////////////////////
|
|
template <class T>
|
|
struct identity
|
|
{
|
|
typedef T type;
|
|
typedef typename add_const_lvalue_reference<T>::type reference;
|
|
reference operator()(reference t)
|
|
{ return t; }
|
|
};
|
|
|
|
//////////////////////////////////////
|
|
// is_class_or_union
|
|
//////////////////////////////////////
|
|
template<class T>
|
|
struct is_class_or_union
|
|
{
|
|
struct twochar { char dummy[2]; };
|
|
template <class U>
|
|
static char is_class_or_union_tester(void(U::*)(void));
|
|
template <class U>
|
|
static twochar is_class_or_union_tester(...);
|
|
static const bool value = sizeof(is_class_or_union_tester<T>(0)) == sizeof(char);
|
|
};
|
|
|
|
//////////////////////////////////////
|
|
// addressof
|
|
//////////////////////////////////////
|
|
template<class T>
|
|
struct addr_impl_ref
|
|
{
|
|
T & v_;
|
|
BOOST_MOVE_FORCEINLINE addr_impl_ref( T & v ): v_( v ) {}
|
|
BOOST_MOVE_FORCEINLINE operator T& () const { return v_; }
|
|
|
|
private:
|
|
addr_impl_ref & operator=(const addr_impl_ref &);
|
|
};
|
|
|
|
template<class T>
|
|
struct addressof_impl
|
|
{
|
|
BOOST_MOVE_FORCEINLINE static T * f( T & v, long )
|
|
{
|
|
return reinterpret_cast<T*>(
|
|
&const_cast<char&>(reinterpret_cast<const volatile char &>(v)));
|
|
}
|
|
|
|
BOOST_MOVE_FORCEINLINE static T * f( T * v, int )
|
|
{ return v; }
|
|
};
|
|
|
|
template<class T>
|
|
BOOST_MOVE_FORCEINLINE T * addressof( T & v )
|
|
{
|
|
return ::boost::move_detail::addressof_impl<T>::f
|
|
( ::boost::move_detail::addr_impl_ref<T>( v ), 0 );
|
|
}
|
|
|
|
//////////////////////////////////////
|
|
// has_pointer_type
|
|
//////////////////////////////////////
|
|
template <class T>
|
|
struct has_pointer_type
|
|
{
|
|
struct two { char c[2]; };
|
|
template <class U> static two test(...);
|
|
template <class U> static char test(typename U::pointer* = 0);
|
|
static const bool value = sizeof(test<T>(0)) == 1;
|
|
};
|
|
|
|
//////////////////////////////////////
|
|
// is_convertible
|
|
//////////////////////////////////////
|
|
#if defined(_MSC_VER) && (_MSC_VER >= 1400)
|
|
|
|
//use intrinsic since in MSVC
|
|
//overaligned types can't go through ellipsis
|
|
template <class T, class U>
|
|
struct is_convertible
|
|
{
|
|
static const bool value = __is_convertible_to(T, U);
|
|
};
|
|
|
|
#else
|
|
|
|
template <class T, class U>
|
|
class is_convertible
|
|
{
|
|
typedef typename add_lvalue_reference<T>::type t_reference;
|
|
typedef char true_t;
|
|
class false_t { char dummy[2]; };
|
|
static false_t dispatch(...);
|
|
static true_t dispatch(U);
|
|
static t_reference trigger();
|
|
public:
|
|
static const bool value = sizeof(dispatch(trigger())) == sizeof(true_t);
|
|
};
|
|
|
|
#endif
|
|
|
|
template <class T, class U, bool IsSame = is_same<T, U>::value>
|
|
struct is_same_or_convertible
|
|
: is_convertible<T, U>
|
|
{};
|
|
|
|
template <class T, class U>
|
|
struct is_same_or_convertible<T, U, true>
|
|
{
|
|
static const bool value = true;
|
|
};
|
|
|
|
template<
|
|
bool C
|
|
, typename F1
|
|
, typename F2
|
|
>
|
|
struct eval_if_c
|
|
: if_c<C,F1,F2>::type
|
|
{};
|
|
|
|
template<
|
|
typename C
|
|
, typename T1
|
|
, typename T2
|
|
>
|
|
struct eval_if
|
|
: if_<C,T1,T2>::type
|
|
{};
|
|
|
|
|
|
#if defined(BOOST_GCC) && (BOOST_GCC <= 40000)
|
|
#define BOOST_MOVE_HELPERS_RETURN_SFINAE_BROKEN
|
|
#endif
|
|
|
|
template<class T, class U, class R = void>
|
|
struct enable_if_convertible
|
|
: enable_if< is_convertible<T, U>, R>
|
|
{};
|
|
|
|
template<class T, class U, class R = void>
|
|
struct disable_if_convertible
|
|
: disable_if< is_convertible<T, U>, R>
|
|
{};
|
|
|
|
template<class T, class U, class R = void>
|
|
struct enable_if_same_or_convertible
|
|
: enable_if< is_same_or_convertible<T, U>, R>
|
|
{};
|
|
|
|
template<class T, class U, class R = void>
|
|
struct disable_if_same_or_convertible
|
|
: disable_if< is_same_or_convertible<T, U>, R>
|
|
{};
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// and_
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
template<bool, class B = true_, class C = true_, class D = true_>
|
|
struct and_impl
|
|
: and_impl<B::value, C, D>
|
|
{};
|
|
|
|
template<>
|
|
struct and_impl<true, true_, true_, true_>
|
|
{
|
|
static const bool value = true;
|
|
};
|
|
|
|
template<class B, class C, class D>
|
|
struct and_impl<false, B, C, D>
|
|
{
|
|
static const bool value = false;
|
|
};
|
|
|
|
template<class A, class B, class C = true_, class D = true_>
|
|
struct and_
|
|
: and_impl<A::value, B, C, D>
|
|
{};
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// or_
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
template<bool, class B = false_, class C = false_, class D = false_>
|
|
struct or_impl
|
|
: or_impl<B::value, C, D>
|
|
{};
|
|
|
|
template<>
|
|
struct or_impl<false, false_, false_, false_>
|
|
{
|
|
static const bool value = false;
|
|
};
|
|
|
|
template<class B, class C, class D>
|
|
struct or_impl<true, B, C, D>
|
|
{
|
|
static const bool value = true;
|
|
};
|
|
|
|
template<class A, class B, class C = false_, class D = false_>
|
|
struct or_
|
|
: or_impl<A::value, B, C, D>
|
|
{};
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// not_
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
template<class T>
|
|
struct not_
|
|
{
|
|
static const bool value = !T::value;
|
|
};
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// enable_if_and / disable_if_and / enable_if_or / disable_if_or
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
template<class R, class A, class B, class C = true_, class D = true_>
|
|
struct enable_if_and
|
|
: enable_if_c< and_<A, B, C, D>::value, R>
|
|
{};
|
|
|
|
template<class R, class A, class B, class C = true_, class D = true_>
|
|
struct disable_if_and
|
|
: disable_if_c< and_<A, B, C, D>::value, R>
|
|
{};
|
|
|
|
template<class R, class A, class B, class C = false_, class D = false_>
|
|
struct enable_if_or
|
|
: enable_if_c< or_<A, B, C, D>::value, R>
|
|
{};
|
|
|
|
template<class R, class A, class B, class C = false_, class D = false_>
|
|
struct disable_if_or
|
|
: disable_if_c< or_<A, B, C, D>::value, R>
|
|
{};
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// has_move_emulation_enabled_impl
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
template<class T>
|
|
struct has_move_emulation_enabled_impl
|
|
: is_convertible< T, ::boost::rv<T>& >
|
|
{};
|
|
|
|
template<class T>
|
|
struct has_move_emulation_enabled_impl<T&>
|
|
{ static const bool value = false; };
|
|
|
|
template<class T>
|
|
struct has_move_emulation_enabled_impl< ::boost::rv<T> >
|
|
{ static const bool value = false; };
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// is_rv_impl
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
template <class T>
|
|
struct is_rv_impl
|
|
{ static const bool value = false; };
|
|
|
|
template <class T>
|
|
struct is_rv_impl< rv<T> >
|
|
{ static const bool value = true; };
|
|
|
|
template <class T>
|
|
struct is_rv_impl< const rv<T> >
|
|
{ static const bool value = true; };
|
|
|
|
// Code from Jeffrey Lee Hellrung, many thanks
|
|
|
|
template< class T >
|
|
struct is_rvalue_reference
|
|
{ static const bool value = false; };
|
|
|
|
#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
|
|
|
|
template< class T >
|
|
struct is_rvalue_reference< T&& >
|
|
{ static const bool value = true; };
|
|
|
|
#else // #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
|
|
|
|
template< class T >
|
|
struct is_rvalue_reference< boost::rv<T>& >
|
|
{ static const bool value = true; };
|
|
|
|
template< class T >
|
|
struct is_rvalue_reference< const boost::rv<T>& >
|
|
{ static const bool value = true; };
|
|
|
|
#endif // #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
|
|
|
|
#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
|
|
|
|
template< class T >
|
|
struct add_rvalue_reference
|
|
{ typedef T&& type; };
|
|
|
|
#else // #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
|
|
|
|
namespace detail_add_rvalue_reference
|
|
{
|
|
template< class T
|
|
, bool emulation = has_move_emulation_enabled_impl<T>::value
|
|
, bool rv = is_rv_impl<T>::value >
|
|
struct add_rvalue_reference_impl { typedef T type; };
|
|
|
|
template< class T, bool emulation>
|
|
struct add_rvalue_reference_impl< T, emulation, true > { typedef T & type; };
|
|
|
|
template< class T, bool rv >
|
|
struct add_rvalue_reference_impl< T, true, rv > { typedef ::boost::rv<T>& type; };
|
|
} // namespace detail_add_rvalue_reference
|
|
|
|
template< class T >
|
|
struct add_rvalue_reference
|
|
: detail_add_rvalue_reference::add_rvalue_reference_impl<T>
|
|
{ };
|
|
|
|
template< class T >
|
|
struct add_rvalue_reference<T &>
|
|
{ typedef T & type; };
|
|
|
|
#endif // #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
|
|
|
|
template< class T > struct remove_rvalue_reference { typedef T type; };
|
|
|
|
#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
|
|
template< class T > struct remove_rvalue_reference< T&& > { typedef T type; };
|
|
#else // #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
|
|
template< class T > struct remove_rvalue_reference< rv<T> > { typedef T type; };
|
|
template< class T > struct remove_rvalue_reference< const rv<T> > { typedef T type; };
|
|
template< class T > struct remove_rvalue_reference< volatile rv<T> > { typedef T type; };
|
|
template< class T > struct remove_rvalue_reference< const volatile rv<T> > { typedef T type; };
|
|
template< class T > struct remove_rvalue_reference< rv<T>& > { typedef T type; };
|
|
template< class T > struct remove_rvalue_reference< const rv<T>& > { typedef T type; };
|
|
template< class T > struct remove_rvalue_reference< volatile rv<T>& > { typedef T type; };
|
|
template< class T > struct remove_rvalue_reference< const volatile rv<T>& >{ typedef T type; };
|
|
#endif // #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
|
|
|
|
// Ideas from Boost.Move review, Jeffrey Lee Hellrung:
|
|
//
|
|
//- TypeTraits metafunctions is_lvalue_reference, add_lvalue_reference, and remove_lvalue_reference ?
|
|
// Perhaps add_reference and remove_reference can be modified so that they behave wrt emulated rvalue
|
|
// references the same as wrt real rvalue references, i.e., add_reference< rv<T>& > -> T& rather than
|
|
// rv<T>& (since T&& & -> T&).
|
|
//
|
|
//- Add'l TypeTraits has_[trivial_]move_{constructor,assign}...?
|
|
//
|
|
//- An as_lvalue(T& x) function, which amounts to an identity operation in C++0x, but strips emulated
|
|
// rvalue references in C++03. This may be necessary to prevent "accidental moves".
|
|
|
|
} //namespace move_detail {
|
|
} //namespace boost {
|
|
|
|
#include <boost/move/detail/config_end.hpp>
|
|
|
|
#endif //#ifndef BOOST_MOVE_DETAIL_META_UTILS_HPP
|