taynpg/cxxLibrary
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

整理

Browse Source
This commit is contained in:
taynpg
2026-03-23 20:54:41 +08:00
commit e13b3650e9
4596 changed files with 1015768 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

41
include/boost/optional/bad_optional_access.hpp Normal file
View File

@@ -0,0 +1,41 @@
// Copyright (C) 2014, Andrzej Krzemienski.
//
// Use, modification, and distribution is subject to 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/optional for documentation.
//
// You are welcome to contact the author at:
// akrzemi1@gmail.com
//
#ifndef BOOST_BAD_OPTIONAL_ACCESS_22MAY2014_HPP
#define BOOST_BAD_OPTIONAL_ACCESS_22MAY2014_HPP
#include <stdexcept>
#if __cplusplus < 201103L
#include <string> // to make converting-ctor std::string(char const*) visible
#endif
namespace boost {
#if defined(__clang__)
# pragma clang diagnostic push
# pragma clang diagnostic ignored "-Wweak-vtables"
#endif
class bad_optional_access : public std::logic_error
{
public:
bad_optional_access()
: std::logic_error("Attempted to access the value of an uninitialized optional object.")
{}
};
#if defined(__clang__)
# pragma clang diagnostic pop
#endif
} // namespace boost
#endif

59
include/boost/optional/detail/experimental_traits.hpp Normal file
View File

@@ -0,0 +1,59 @@
// Copyright (C) 2017 Andrzej Krzemienski.
//
// Use, modification, and distribution is subject to 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/optional for documentation.
//
// You are welcome to contact the author at:
// akrzemi1@gmail.com
#ifndef BOOST_OPTIONAL_DETAIL_EXPERIMENTAL_TRAITS_04NOV2017_HPP
#define BOOST_OPTIONAL_DETAIL_EXPERIMENTAL_TRAITS_04NOV2017_HPP
#include <boost/type_traits.hpp>
// The condition to use POD implementation
#ifdef BOOST_OPTIONAL_CONFIG_NO_POD_SPEC
# define BOOST_OPTIONAL_DETAIL_NO_SPEC_FOR_TRIVIAL_TYPES
#elif defined BOOST_OPTIONAL_CONFIG_NO_SPEC_FOR_TRIVIAL_TYPES
# define BOOST_OPTIONAL_DETAIL_NO_SPEC_FOR_TRIVIAL_TYPES
#elif !defined BOOST_HAS_TRIVIAL_MOVE_ASSIGN
# define BOOST_OPTIONAL_DETAIL_NO_SPEC_FOR_TRIVIAL_TYPES
#elif !defined BOOST_HAS_TRIVIAL_MOVE_CONSTRUCTOR
# define BOOST_OPTIONAL_DETAIL_NO_SPEC_FOR_TRIVIAL_TYPES
#elif !defined BOOST_HAS_TRIVIAL_COPY
# define BOOST_OPTIONAL_DETAIL_NO_SPEC_FOR_TRIVIAL_TYPES
#elif !defined BOOST_HAS_TRIVIAL_ASSIGN
# define BOOST_OPTIONAL_DETAIL_NO_SPEC_FOR_TRIVIAL_TYPES
#elif !defined BOOST_HAS_TRIVIAL_DESTRUCTOR
# define BOOST_OPTIONAL_DETAIL_NO_SPEC_FOR_TRIVIAL_TYPES
#endif
namespace boost { namespace optional_detail {
#ifndef BOOST_OPTIONAL_DETAIL_NO_SPEC_FOR_TRIVIAL_TYPES
template <typename T>
struct is_trivially_semiregular
: boost::conditional<(boost::has_trivial_copy_constructor<T>::value &&
boost::has_trivial_move_constructor<T>::value &&
boost::has_trivial_destructor<T>::value &&
boost::has_trivial_move_assign<T>::value &&
boost::has_trivial_assign<T>::value),
boost::true_type, boost::false_type>::type
{};
#else
template <typename T>
struct is_trivially_semiregular
: boost::conditional<(boost::is_scalar<T>::value && !boost::is_const<T>::value && !boost::is_volatile<T>::value),
boost::true_type, boost::false_type>::type
{};
#endif
}} // boost::optional_detail
#endif

70
include/boost/optional/detail/optional_aligned_storage.hpp Normal file
View File

@@ -0,0 +1,70 @@
// Copyright (C) 2003, 2008 Fernando Luis Cacciola Carballal.
// Copyright (C) 2016 Andrzej Krzemienski.
//
// Use, modification, and distribution is subject to 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/optional for documentation.
//
// You are welcome to contact the author at:
// fernando_cacciola@hotmail.com
// akrzemi1@gmail.com
#ifndef BOOST_OPTIONAL_OPTIONAL_DETAIL_OPTIONAL_ALIGNED_STORAGE_AJK_12FEB2016_HPP
#define BOOST_OPTIONAL_OPTIONAL_DETAIL_OPTIONAL_ALIGNED_STORAGE_AJK_12FEB2016_HPP
namespace boost {
namespace optional_detail {
// This local class is used instead of that in "aligned_storage.hpp"
// because I've found the 'official' class to ICE BCB5.5
// when some types are used with optional<>
// (due to sizeof() passed down as a non-type template parameter)
template <class T>
class aligned_storage
{
// Borland ICEs if unnamed unions are used for this!
// BOOST_MAY_ALIAS works around GCC warnings about breaking strict aliasing rules when casting storage address to T*
union BOOST_MAY_ALIAS dummy_u
{
unsigned char data[ sizeof(T) ];
BOOST_DEDUCED_TYPENAME type_with_alignment<
::boost::alignment_of<T>::value >::type aligner_;
} dummy_ ;
public:
#if defined(BOOST_OPTIONAL_DETAIL_USE_ATTRIBUTE_MAY_ALIAS)
void const* address() const { return &dummy_; }
void * address() { return &dummy_; }
#else
void const* address() const { return dummy_.data; }
void * address() { return dummy_.data; }
#endif
#if defined(BOOST_OPTIONAL_DETAIL_USE_ATTRIBUTE_MAY_ALIAS)
// This workaround is supposed to silence GCC warnings about broken strict aliasing rules
T const* ptr_ref() const
{
union { void const* ap_pvoid; T const* as_ptype; } caster = { address() };
return caster.as_ptype;
}
T * ptr_ref()
{
union { void* ap_pvoid; T* as_ptype; } caster = { address() };
return caster.as_ptype;
}
#else
T const* ptr_ref() const { return static_cast<T const*>(address()); }
T * ptr_ref() { return static_cast<T *> (address()); }
#endif
T const& ref() const { return *boost::core::launder(ptr_ref()); }
T & ref() { return *boost::core::launder(ptr_ref()); }
} ;
} // namespace optional_detail
} // namespace boost
#endif // header guard

144
include/boost/optional/detail/optional_config.hpp Normal file
View File

@@ -0,0 +1,144 @@
// Copyright (C) 2003, 2008 Fernando Luis Cacciola Carballal.
// Copyright (C) 2015 - 2017 Andrzej Krzemienski.
//
// Use, modification, and distribution is subject to 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/optional for documentation.
//
// You are welcome to contact the author at:
// akrzemi1@gmail.com
#ifndef BOOST_OPTIONAL_DETAIL_OPTIONAL_CONFIG_AJK_28JAN2015_HPP
#define BOOST_OPTIONAL_DETAIL_OPTIONAL_CONFIG_AJK_28JAN2015_HPP
#include <boost/config.hpp>
#include <boost/config/workaround.hpp>
#if (defined BOOST_OPTIONAL_CONFIG_NO_RVALUE_REFERENCES)
# define BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES
#endif
#if BOOST_WORKAROUND(BOOST_INTEL_CXX_VERSION,<=700)
// AFAICT only Intel 7 correctly resolves the overload set
// that includes the in-place factory taking functions,
// so for the other icc versions, in-place factory support
// is disabled
# define BOOST_OPTIONAL_NO_INPLACE_FACTORY_SUPPORT
#endif
#if BOOST_WORKAROUND(BOOST_BORLANDC, <= 0x551)
// BCB (5.5.1) cannot parse the nested template struct in an inplace factory.
# define BOOST_OPTIONAL_NO_INPLACE_FACTORY_SUPPORT
#endif
#if !defined(BOOST_OPTIONAL_NO_INPLACE_FACTORY_SUPPORT) \
&& defined BOOST_BCB_PARTIAL_SPECIALIZATION_BUG
// BCB (up to 5.64) has the following bug:
// If there is a member function/operator template of the form
// template<class Expr> mfunc( Expr expr ) ;
// some calls are resolved to this even if there are other better matches.
// The effect of this bug is that calls to converting ctors and assignments
// are incorrectly sink to this general catch-all member function template as shown above.
# define BOOST_OPTIONAL_WEAK_OVERLOAD_RESOLUTION
#endif
#if !defined(BOOST_NO_MAY_ALIAS)
// GCC since 3.3 and some other compilers have may_alias attribute that helps to alleviate
// optimizer issues with regard to violation of the strict aliasing rules. The optional< T >
// storage type is marked with this attribute in order to let the compiler know that it will
// alias objects of type T and silence compilation warnings.
# define BOOST_OPTIONAL_DETAIL_USE_ATTRIBUTE_MAY_ALIAS
#endif
#if (defined(_MSC_VER) && _MSC_VER <= 1800)
// on MSVC 2013 and earlier an unwanted temporary is created when you assign from
// a const lvalue of integral type. Thus we bind not to the original address but
// to a temporary.
# define BOOST_OPTIONAL_CONFIG_NO_PROPER_ASSIGN_FROM_CONST_INT
#endif
#if (defined __GNUC__) && (!defined BOOST_INTEL_CXX_VERSION) && (!defined __clang__)
// On some GCC versions an unwanted temporary is created when you copy-initialize
// from a const lvalue of integral type. Thus we bind not to the original address but
// to a temporary.
# if (__GNUC__ < 4)
# define BOOST_OPTIONAL_CONFIG_NO_PROPER_CONVERT_FROM_CONST_INT
# endif
# if (__GNUC__ == 4 && __GNUC_MINOR__ <= 5)
# define BOOST_OPTIONAL_CONFIG_NO_PROPER_CONVERT_FROM_CONST_INT
# endif
# if (__GNUC__ == 5 && __GNUC_MINOR__ < 2)
# define BOOST_OPTIONAL_CONFIG_NO_PROPER_CONVERT_FROM_CONST_INT
# endif
# if (__GNUC__ == 5 && __GNUC_MINOR__ == 2 && __GNUC_PATCHLEVEL__ == 0)
# define BOOST_OPTIONAL_CONFIG_NO_PROPER_CONVERT_FROM_CONST_INT
# endif
#endif // defined(__GNUC__)
#if (defined __GNUC__)
// On some initial rvalue reference implementations GCC does it in a strange way,
// preferring perfect-forwarding constructor to implicit copy constructor.
# if (__GNUC__ == 4 && __GNUC_MINOR__ == 4)
# define BOOST_OPTIONAL_CONFIG_NO_LEGAL_CONVERT_FROM_REF
# endif
# if (__GNUC__ == 4 && __GNUC_MINOR__ == 5)
# define BOOST_OPTIONAL_CONFIG_NO_LEGAL_CONVERT_FROM_REF
# endif
#endif // defined(__GNUC__)
#if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) && !defined(BOOST_NO_CXX11_DECLTYPE) && !BOOST_WORKAROUND(BOOST_MSVC, < 1800) && !BOOST_WORKAROUND(BOOST_GCC_VERSION, < 40500) && !defined(__SUNPRO_CC)
// this condition is a copy paste from is_constructible.hpp
// I also disable SUNPRO, as it seems not to support type_traits correctly
#else
# define BOOST_OPTIONAL_DETAIL_NO_IS_CONSTRUCTIBLE_TRAIT
#endif
#if defined __SUNPRO_CC
# define BOOST_OPTIONAL_DETAIL_NO_SFINAE_FRIENDLY_CONSTRUCTORS
#elif (defined _MSC_FULL_VER) && (_MSC_FULL_VER < 190023026)
# define BOOST_OPTIONAL_DETAIL_NO_SFINAE_FRIENDLY_CONSTRUCTORS
#elif defined BOOST_GCC && !defined BOOST_GCC_CXX11
# define BOOST_OPTIONAL_DETAIL_NO_SFINAE_FRIENDLY_CONSTRUCTORS
#elif defined BOOST_GCC_VERSION && BOOST_GCC_VERSION < 40800
# define BOOST_OPTIONAL_DETAIL_NO_SFINAE_FRIENDLY_CONSTRUCTORS
#endif
// Detect support for defaulting move operations
// (some older compilers implement rvalue references,
// defaulted functions but move operations are not special members and cannot be defaulted)
#ifdef BOOST_NO_CXX11_DEFAULTED_FUNCTIONS
# define BOOST_OPTIONAL_DETAIL_NO_DEFAULTED_MOVE_FUNCTIONS
#elif BOOST_WORKAROUND(BOOST_MSVC, < 1900)
# define BOOST_OPTIONAL_DETAIL_NO_DEFAULTED_MOVE_FUNCTIONS
#elif BOOST_WORKAROUND(BOOST_GCC_VERSION, < 40600)
# define BOOST_OPTIONAL_DETAIL_NO_DEFAULTED_MOVE_FUNCTIONS
#endif
#ifdef BOOST_OPTIONAL_CONFIG_NO_DIRECT_STORAGE_SPEC
# define BOOST_OPTIONAL_DETAIL_NO_DIRECT_STORAGE_SPEC
#endif
#ifdef BOOST_NO_CXX11_REF_QUALIFIERS
# define BOOST_OPTIONAL_CONST_REF_QUAL const
# define BOOST_OPTIONAL_REF_QUAL
#else
# define BOOST_OPTIONAL_CONST_REF_QUAL const&
# define BOOST_OPTIONAL_REF_QUAL &
#endif
#endif // header guard

36
include/boost/optional/detail/optional_factory_support.hpp Normal file
View File

@@ -0,0 +1,36 @@
// Copyright (C) 2003, 2008 Fernando Luis Cacciola Carballal.
// Copyright (C) 2016 Andrzej Krzemienski.
//
// Use, modification, and distribution is subject to 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/optional for documentation.
//
// You are welcome to contact the author at:
// fernando_cacciola@hotmail.com
// akrzemi1@gmail.com
#ifndef BOOST_OPTIONAL_OPTIONAL_DETAIL_OPTIONAL_FACTORY_SUPPORT_AJK_12FEB2016_HPP
#define BOOST_OPTIONAL_OPTIONAL_DETAIL_OPTIONAL_FACTORY_SUPPORT_AJK_12FEB2016_HPP
// Daniel Wallin discovered that bind/apply.hpp badly interacts with the apply<>
// member template of a factory as used in the optional<> implementation.
// He proposed this simple fix which is to move the call to apply<> outside
// namespace boost.
namespace boost_optional_detail
{
template <class T, class Factory>
inline void construct(Factory const& factory, void* address)
{
factory.BOOST_NESTED_TEMPLATE apply<T>(address);
}
}
namespace boost
{
class in_place_factory_base ;
class typed_in_place_factory_base ;
}
#endif // header guard

49
include/boost/optional/detail/optional_hash.hpp Normal file
View File

@@ -0,0 +1,49 @@
// Copyright (C) 2022 Andrzej Krzemienski.
//
// Use, modification, and distribution is subject to 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/optional for documentation.
//
// You are welcome to contact the author at:
// akrzemi1@gmail.com
#ifndef BOOST_OPTIONAL_DETAIL_OPTIONAL_HASH_AJK_20MAY2022_HPP
#define BOOST_OPTIONAL_DETAIL_OPTIONAL_HASH_AJK_20MAY2022_HPP
#include <boost/optional/optional_fwd.hpp>
#include <boost/config.hpp>
#if !defined(BOOST_OPTIONAL_CONFIG_DO_NOT_SPECIALIZE_STD_HASH) && !defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)
#include <functional>
namespace std
{
template <typename T>
struct hash<boost::optional<T> >
{
typedef std::size_t result_type;
typedef boost::optional<T> argument_type;
BOOST_CONSTEXPR result_type operator()(const argument_type& arg) const {
return arg ? std::hash<T>()(*arg) : result_type();
}
};
template <typename T>
struct hash<boost::optional<T&> >
{
typedef std::size_t result_type;
typedef boost::optional<T&> argument_type;
BOOST_CONSTEXPR result_type operator()(const argument_type& arg) const {
return arg ? std::hash<T>()(*arg) : result_type();
}
};
}
#endif // !defined(BOOST_OPTIONAL_CONFIG_DO_NOT_SPECIALIZE_STD_HASH) && !defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)
#endif // header guard

280
include/boost/optional/detail/optional_reference_spec.hpp Normal file
View File

@@ -0,0 +1,280 @@
// Copyright (C) 2015-2024 Andrzej Krzemienski.
//
// Use, modification, and distribution is subject to 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/optional for documentation.
//
// You are welcome to contact the author at:
// akrzemi1@gmail.com
#ifndef BOOST_OPTIONAL_DETAIL_OPTIONAL_REFERENCE_SPEC_AJK_03OCT2015_HPP
#define BOOST_OPTIONAL_DETAIL_OPTIONAL_REFERENCE_SPEC_AJK_03OCT2015_HPP
#ifdef BOOST_OPTIONAL_CONFIG_NO_PROPER_ASSIGN_FROM_CONST_INT
#include <boost/type_traits/is_integral.hpp>
#include <boost/type_traits/is_const.hpp>
#endif
# if 1
namespace boost {
namespace detail {
#ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES
template <class From>
void prevent_binding_rvalue()
{
#ifndef BOOST_OPTIONAL_CONFIG_ALLOW_BINDING_TO_RVALUES
static_assert(boost::is_lvalue_reference<From>::value,
"binding rvalue references to optional lvalue references is disallowed");
#endif
}
template <class T>
BOOST_DEDUCED_TYPENAME boost::remove_reference<T>::type& forward_reference(T&& r)
{
static_assert(boost::is_lvalue_reference<T>::value,
"binding rvalue references to optional lvalue references is disallowed");
return optional_detail::forward<T>(r);
}
#endif // BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES
template <class T>
struct is_const_integral
{
static const bool value = boost::is_const<T>::value && boost::is_integral<T>::value;
};
template <class T>
struct is_const_integral_bad_for_conversion
{
#if (!defined BOOST_OPTIONAL_CONFIG_ALLOW_BINDING_TO_RVALUES) && (defined BOOST_OPTIONAL_CONFIG_NO_PROPER_CONVERT_FROM_CONST_INT)
static const bool value = boost::is_const<T>::value && boost::is_integral<T>::value;
#else
static const bool value = false;
#endif
};
template <class From>
void prevent_assignment_from_false_const_integral()
{
#ifndef BOOST_OPTIONAL_CONFIG_ALLOW_BINDING_TO_RVALUES
#ifdef BOOST_OPTIONAL_CONFIG_NO_PROPER_ASSIGN_FROM_CONST_INT
// MSVC compiler without rvalue references: we need to disable the assignment from
// const integral lvalue reference, as it may be an invalid temporary
static_assert(!is_const_integral<From>::value,
"binding const lvalue references to integral types is disabled in this compiler");
#endif
#endif
}
template <class T>
struct is_optional_
{
static const bool value = false;
};
template <class U>
struct is_optional_< ::boost::optional<U> >
{
static const bool value = true;
};
template <class T>
struct is_no_optional
{
static const bool value = !is_optional_<BOOST_DEDUCED_TYPENAME boost::decay<T>::type>::value;
};
template <class T, class U>
struct is_same_decayed
{
static const bool value = ::boost::is_same<T, BOOST_DEDUCED_TYPENAME ::boost::remove_reference<U>::type>::value
|| ::boost::is_same<T, const BOOST_DEDUCED_TYPENAME ::boost::remove_reference<U>::type>::value;
};
template <class T, class U>
struct no_unboxing_cond
{
static const bool value = is_no_optional<U>::value && !is_same_decayed<T, U>::value;
};
} // namespace detail
template <class T>
class optional<T&> : public optional_detail::optional_tag
{
T* ptr_;
public:
typedef T& value_type;
typedef T& reference_type;
typedef T& reference_const_type;
typedef T& rval_reference_type;
typedef T* pointer_type;
typedef T* pointer_const_type;
optional() BOOST_NOEXCEPT : ptr_() {}
optional(none_t) BOOST_NOEXCEPT : ptr_() {}
template <class U>
explicit optional(const optional<U&>& rhs) BOOST_NOEXCEPT : ptr_(rhs.get_ptr()) {}
optional(const optional& rhs) BOOST_NOEXCEPT : ptr_(rhs.get_ptr()) {}
// the following two implement a 'conditionally explicit' constructor: condition is a hack for buggy compilers with screwed conversion construction from const int
template <class U>
explicit optional(U& rhs, BOOST_DEDUCED_TYPENAME boost::enable_if_c<detail::is_same_decayed<T, U>::value && detail::is_const_integral_bad_for_conversion<U>::value, bool>::type = true) BOOST_NOEXCEPT
: ptr_(boost::addressof(rhs)) {}
template <class U>
optional(U& rhs, BOOST_DEDUCED_TYPENAME boost::enable_if_c<detail::is_same_decayed<T, U>::value && !detail::is_const_integral_bad_for_conversion<U>::value, bool>::type = true) BOOST_NOEXCEPT
: ptr_(boost::addressof(rhs)) {}
optional& operator=(const optional& rhs) BOOST_NOEXCEPT { ptr_ = rhs.get_ptr(); return *this; }
template <class U>
optional& operator=(const optional<U&>& rhs) BOOST_NOEXCEPT { ptr_ = rhs.get_ptr(); return *this; }
optional& operator=(none_t) BOOST_NOEXCEPT { ptr_ = 0; return *this; }
void swap(optional& rhs) BOOST_NOEXCEPT { std::swap(ptr_, rhs.ptr_); }
T& get() const { BOOST_ASSERT(ptr_); return *ptr_; }
T* get_ptr() const BOOST_NOEXCEPT { return ptr_; }
T* operator->() const { BOOST_ASSERT(ptr_); return ptr_; }
T& operator*() const { BOOST_ASSERT(ptr_); return *ptr_; }
T& value() const
{
if (this->is_initialized())
return this->get();
else
throw_exception(bad_optional_access());
}
explicit operator bool() const BOOST_NOEXCEPT { return ptr_ != 0; }
void reset() BOOST_NOEXCEPT { ptr_ = 0; }
bool is_initialized() const BOOST_NOEXCEPT { return ptr_ != 0; }
bool has_value() const BOOST_NOEXCEPT { return ptr_ != 0; }
template <typename F>
optional<typename optional_detail::result_of<F, reference_const_type>::type>
map(F f) const
{
if (this->has_value())
return f(this->get());
else
return none;
}
template <typename F>
optional<typename optional_detail::result_value_type<F, reference_const_type>::type>
flat_map(F f) const
{
if (this->has_value())
return f(get());
else
return none;
}
#ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES
optional(T&& /* rhs */) BOOST_NOEXCEPT { detail::prevent_binding_rvalue<T&&>(); }
template <class R>
optional(R&& r, BOOST_DEDUCED_TYPENAME boost::enable_if<detail::no_unboxing_cond<T, R>, bool>::type = true) BOOST_NOEXCEPT
: ptr_(boost::addressof(r)) { detail::prevent_binding_rvalue<R>(); }
template <class R>
optional(bool cond, R&& r, BOOST_DEDUCED_TYPENAME boost::enable_if<detail::is_no_optional<R>, bool>::type = true) BOOST_NOEXCEPT
: ptr_(cond ? boost::addressof(r) : 0) { detail::prevent_binding_rvalue<R>(); }
template <class R>
BOOST_DEDUCED_TYPENAME boost::enable_if<detail::is_no_optional<R>, optional<T&>&>::type
operator=(R&& r) BOOST_NOEXCEPT { detail::prevent_binding_rvalue<R>(); ptr_ = boost::addressof(r); return *this; }
template <class R>
void emplace(R&& r, BOOST_DEDUCED_TYPENAME boost::enable_if<detail::is_no_optional<R>, bool>::type = true) BOOST_NOEXCEPT
{ detail::prevent_binding_rvalue<R>(); ptr_ = boost::addressof(r); }
template <class R>
T& get_value_or(R&& r, BOOST_DEDUCED_TYPENAME boost::enable_if<detail::is_no_optional<R>, bool>::type = true) const BOOST_NOEXCEPT
{ detail::prevent_binding_rvalue<R>(); return ptr_ ? *ptr_ : r; }
template <class R>
T& value_or(R&& r, BOOST_DEDUCED_TYPENAME boost::enable_if<detail::is_no_optional<R>, bool>::type = true) const BOOST_NOEXCEPT
{ detail::prevent_binding_rvalue<R>(); return ptr_ ? *ptr_ : r; }
template <class R>
void reset(R&& r, BOOST_DEDUCED_TYPENAME boost::enable_if<detail::is_no_optional<R>, bool>::type = true) BOOST_NOEXCEPT
{ detail::prevent_binding_rvalue<R>(); ptr_ = boost::addressof(r); }
template <class F>
T& value_or_eval(F f) const { return ptr_ ? *ptr_ : detail::forward_reference(f()); }
#else // BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES
// the following two implement a 'conditionally explicit' constructor
template <class U>
explicit optional(U& v, BOOST_DEDUCED_TYPENAME boost::enable_if_c<detail::no_unboxing_cond<T, U>::value && detail::is_const_integral_bad_for_conversion<U>::value, bool>::type = true) BOOST_NOEXCEPT
: ptr_(boost::addressof(v)) { }
template <class U>
optional(U& v, BOOST_DEDUCED_TYPENAME boost::enable_if_c<detail::no_unboxing_cond<T, U>::value && !detail::is_const_integral_bad_for_conversion<U>::value, bool>::type = true) BOOST_NOEXCEPT
: ptr_(boost::addressof(v)) { }
template <class U>
optional(bool cond, U& v, BOOST_DEDUCED_TYPENAME boost::enable_if<detail::is_no_optional<U>, bool>::type = true) BOOST_NOEXCEPT : ptr_(cond ? boost::addressof(v) : 0) {}
template <class U>
BOOST_DEDUCED_TYPENAME boost::enable_if<detail::is_no_optional<U>, optional<T&>&>::type
operator=(U& v) BOOST_NOEXCEPT
{
detail::prevent_assignment_from_false_const_integral<U>();
ptr_ = boost::addressof(v); return *this;
}
template <class U>
void emplace(U& v, BOOST_DEDUCED_TYPENAME boost::enable_if<detail::is_no_optional<U>, bool>::type = true) BOOST_NOEXCEPT
{ ptr_ = boost::addressof(v); }
template <class U>
T& get_value_or(U& v, BOOST_DEDUCED_TYPENAME boost::enable_if<detail::is_no_optional<U>, bool>::type = true) const BOOST_NOEXCEPT
{ return ptr_ ? *ptr_ : v; }
template <class U>
T& value_or(U& v, BOOST_DEDUCED_TYPENAME boost::enable_if<detail::is_no_optional<U>, bool>::type = true) const BOOST_NOEXCEPT
{ return ptr_ ? *ptr_ : v; }
template <class U>
void reset(U& v, BOOST_DEDUCED_TYPENAME boost::enable_if<detail::is_no_optional<U>, bool>::type = true) BOOST_NOEXCEPT
{ ptr_ = boost::addressof(v); }
template <class F>
T& value_or_eval(F f) const { return ptr_ ? *ptr_ : f(); }
#endif // BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES
};
template <class T>
void swap ( optional<T&>& x, optional<T&>& y) BOOST_NOEXCEPT
{
x.swap(y);
}
} // namespace boost
#endif // 1/0
#endif // header guard

196
include/boost/optional/detail/optional_relops.hpp Normal file
View File

@@ -0,0 +1,196 @@
// Copyright (C) 2003, 2008 Fernando Luis Cacciola Carballal.
// Copyright (C) 2015, 2024 Andrzej Krzemienski.
//
// Use, modification, and distribution is subject to 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/optional for documentation.
//
// You are welcome to contact the author at:
// akrzemi1@gmail.com
#ifndef BOOST_OPTIONAL_DETAIL_OPTIONAL_RELOPS_AJK_03OCT2015_HPP
#define BOOST_OPTIONAL_DETAIL_OPTIONAL_RELOPS_AJK_03OCT2015_HPP
namespace boost {
// optional's relational operators ( ==, !=, <, >, <=, >= ) have deep-semantics (compare values).
// WARNING: This is UNLIKE pointers. Use equal_pointees()/less_pointees() in generic code instead,
// to obtain the same semantic for pointers.
//
// optional<T> vs optional<T> cases
//
template<class T>
inline
bool operator == ( optional<T> const& x, optional<T> const& y )
{ return bool(x) && bool(y) ? *x == *y : bool(x) == bool(y); }
template<class T>
inline
bool operator < ( optional<T> const& x, optional<T> const& y )
{ return !y ? false : (!x ? true : (*x) < (*y)); }
template<class T>
inline
bool operator != ( optional<T> const& x, optional<T> const& y )
{ return !( x == y ) ; }
template<class T>
inline
bool operator > ( optional<T> const& x, optional<T> const& y )
{ return y < x ; }
template<class T>
inline
bool operator <= ( optional<T> const& x, optional<T> const& y )
{ return !( y < x ) ; }
template<class T>
inline
bool operator >= ( optional<T> const& x, optional<T> const& y )
{ return !( x < y ) ; }
//
// optional<T> vs T cases
//
template<class T>
inline
bool operator == ( optional<T> const& x, T const& y )
{ return x && (*x == y); }
template<class T>
inline
bool operator < ( optional<T> const& x, T const& y )
{ return (!x) || (*x < y); }
template<class T>
inline
bool operator != ( optional<T> const& x, T const& y )
{ return !( x == y ) ; }
template<class T>
inline
bool operator > ( optional<T> const& x, T const& y )
{ return y < x ; }
template<class T>
inline
bool operator <= ( optional<T> const& x, T const& y )
{ return !( y < x ) ; }
template<class T>
inline
bool operator >= ( optional<T> const& x, T const& y )
{ return !( x < y ) ; }
//
// T vs optional<T> cases
//
template<class T>
inline
bool operator == ( T const& x, optional<T> const& y )
{ return y && (x == *y); }
template<class T>
inline
bool operator < ( T const& x, optional<T> const& y )
{ return y && (x < *y); }
template<class T>
inline
bool operator != ( T const& x, optional<T> const& y )
{ return !( x == y ) ; }
template<class T>
inline
bool operator > ( T const& x, optional<T> const& y )
{ return y < x ; }
template<class T>
inline
bool operator <= ( T const& x, optional<T> const& y )
{ return !( y < x ) ; }
template<class T>
inline
bool operator >= ( T const& x, optional<T> const& y )
{ return !( x < y ) ; }
//
// optional<T> vs none cases
//
template<class T>
inline
bool operator == ( optional<T> const& x, none_t ) BOOST_NOEXCEPT
{ return !x; }
template<class T>
inline
bool operator < ( optional<T> const&, none_t )
{ return false; }
template<class T>
inline
bool operator != ( optional<T> const& x, none_t ) BOOST_NOEXCEPT
{ return bool(x); }
template<class T>
inline
bool operator > ( optional<T> const& x, none_t y )
{ return y < x ; }
template<class T>
inline
bool operator <= ( optional<T> const& x, none_t y )
{ return !( y < x ) ; }
template<class T>
inline
bool operator >= ( optional<T> const& x, none_t y )
{ return !( x < y ) ; }
//
// none vs optional<T> cases
//
template<class T>
inline
bool operator == ( none_t , optional<T> const& y ) BOOST_NOEXCEPT
{ return !y; }
template<class T>
inline
bool operator < ( none_t , optional<T> const& y )
{ return bool(y); }
template<class T>
inline
bool operator != ( none_t, optional<T> const& y ) BOOST_NOEXCEPT
{ return bool(y); }
template<class T>
inline
bool operator > ( none_t x, optional<T> const& y )
{ return y < x ; }
template<class T>
inline
bool operator <= ( none_t x, optional<T> const& y )
{ return !( y < x ) ; }
template<class T>
inline
bool operator >= ( none_t x, optional<T> const& y )
{ return !( x < y ) ; }
} // namespace boost
#endif // header guard

117
include/boost/optional/detail/optional_swap.hpp Normal file
View File

@@ -0,0 +1,117 @@
// Copyright (C) 2003, 2008 Fernando Luis Cacciola Carballal.
// Copyright (C) 2015 Andrzej Krzemienski.
//
// Use, modification, and distribution is subject to 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/optional for documentation.
//
// You are welcome to contact the author at:
// akrzemi1@gmail.com
#ifndef BOOST_OPTIONAL_DETAIL_OPTIONAL_SWAP_AJK_28JAN2015_HPP
#define BOOST_OPTIONAL_DETAIL_OPTIONAL_SWAP_AJK_28JAN2015_HPP
#include <boost/core/invoke_swap.hpp>
#include <boost/optional/optional_fwd.hpp>
namespace boost {
namespace optional_detail {
template <bool use_default_constructor> struct swap_selector;
template <>
struct swap_selector<true>
{
template <class T>
static void optional_swap ( optional<T>& x, optional<T>& y )
{
const bool hasX = !!x;
const bool hasY = !!y;
if ( !hasX && !hasY )
return;
if( !hasX )
x.emplace();
else if ( !hasY )
y.emplace();
// Boost.Core.Swap will take care of ADL and workarounds for broken compilers
boost::core::invoke_swap(x.get(), y.get());
if( !hasX )
y = boost::none ;
else if( !hasY )
x = boost::none ;
}
};
#ifdef BOOST_OPTIONAL_DETAIL_MOVE
# undef BOOST_OPTIONAL_DETAIL_MOVE
#endif
#ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES
# define BOOST_OPTIONAL_DETAIL_MOVE(EXPR_) optional_detail::move(EXPR_)
#else
# define BOOST_OPTIONAL_DETAIL_MOVE(EXPR_) EXPR_
#endif
template <>
struct swap_selector<false>
{
template <class T>
static void optional_swap ( optional<T>& x, optional<T>& y )
//BOOST_NOEXCEPT_IF(::boost::is_nothrow_move_constructible<T>::value && BOOST_NOEXCEPT_EXPR(boost::core::invoke_swap(*x, *y)))
{
if (x)
{
if (y)
{
boost::core::invoke_swap(*x, *y);
}
else
{
y = BOOST_OPTIONAL_DETAIL_MOVE(*x);
x = boost::none;
}
}
else
{
if (y)
{
x = BOOST_OPTIONAL_DETAIL_MOVE(*y);
y = boost::none;
}
}
}
};
} // namespace optional_detail
#if (!defined BOOST_CONFIG_RESTORE_OBSOLETE_SWAP_IMPLEMENTATION)
template<class T>
struct optional_swap_should_use_default_constructor : boost::false_type {} ;
#else
template<class T>
struct optional_swap_should_use_default_constructor : has_nothrow_default_constructor<T> {} ;
#endif
template <class T>
inline void swap ( optional<T>& x, optional<T>& y )
//BOOST_NOEXCEPT_IF(::boost::is_nothrow_move_constructible<T>::value && BOOST_NOEXCEPT_EXPR(boost::core::invoke_swap(*x, *y)))
{
optional_detail::swap_selector<optional_swap_should_use_default_constructor<T>::value>::optional_swap(x, y);
}
} // namespace boost
#undef BOOST_OPTIONAL_DETAIL_MOVE
#endif // header guard

270
include/boost/optional/detail/optional_trivially_copyable_base.hpp Normal file
View File

@@ -0,0 +1,270 @@
// Copyright (C) 2017 Andrzej Krzemienski.
//
// Use, modification, and distribution is subject to 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/optional for documentation.
//
// You are welcome to contact the author at:
// akrzemi1@gmail.com
// trivially-copyable version of the storage
template<class T>
class tc_optional_base : public optional_tag
{
private :
typedef tc_optional_base<T> this_type ;
protected :
typedef T value_type ;
protected:
typedef T & reference_type ;
typedef T const& reference_const_type ;
typedef T && rval_reference_type ;
typedef T && reference_type_of_temporary_wrapper ;
typedef T * pointer_type ;
typedef T const* pointer_const_type ;
typedef T const& argument_type ;
tc_optional_base()
:
m_initialized(false), m_storage() {}
tc_optional_base ( none_t )
:
m_initialized(false), m_storage() {}
tc_optional_base ( init_value_tag, argument_type val )
:
m_initialized(true), m_storage(val) {}
tc_optional_base ( bool cond, argument_type val )
:
m_initialized(cond), m_storage(val) {}
// tc_optional_base ( tc_optional_base const& ) = default;
template<class Expr, class PtrExpr>
explicit tc_optional_base ( Expr&& expr, PtrExpr const* tag )
:
m_initialized(false)
{
construct(optional_detail::forward<Expr>(expr),tag);
}
// tc_optional_base& operator= ( tc_optional_base const& ) = default;
// ~tc_optional_base() = default;
// Assigns from another optional<T> (deep-copies the rhs value)
void assign ( tc_optional_base const& rhs )
{
*this = rhs;
}
// Assigns from another _convertible_ optional<U> (deep-copies the rhs value)
template<class U>
void assign ( optional<U> const& rhs )
{
if ( rhs.is_initialized() )
#ifndef BOOST_OPTIONAL_CONFIG_RESTORE_ASSIGNMENT_OF_NONCONVERTIBLE_TYPES
m_storage = rhs.get();
#else
m_storage = static_cast<value_type>(rhs.get());
#endif
m_initialized = rhs.is_initialized();
}
// move-assigns from another _convertible_ optional<U> (deep-moves from the rhs value)
template<class U>
void assign ( optional<U>&& rhs )
{
typedef BOOST_DEDUCED_TYPENAME optional<U>::rval_reference_type ref_type;
if ( rhs.is_initialized() )
m_storage = static_cast<ref_type>(rhs.get());
m_initialized = rhs.is_initialized();
}
void assign ( argument_type val )
{
construct(val);
}
void assign ( none_t ) { destroy(); }
#ifndef BOOST_OPTIONAL_NO_INPLACE_FACTORY_SUPPORT
template<class Expr, class ExprPtr>
void assign_expr ( Expr&& expr, ExprPtr const* tag )
{
construct(optional_detail::forward<Expr>(expr),tag);
}
#endif
public :
// Destroys the current value, if any, leaving this UNINITIALIZED
// No-throw (assuming T::~T() doesn't)
void reset() BOOST_NOEXCEPT { destroy(); }
// **DEPRECATED** Replaces the current value -if any- with 'val'
void reset ( argument_type val ) BOOST_NOEXCEPT { assign(val); }
// Returns a pointer to the value if this is initialized, otherwise,
// returns NULL.
// No-throw
pointer_const_type get_ptr() const { return m_initialized ? get_ptr_impl() : 0 ; }
pointer_type get_ptr() { return m_initialized ? get_ptr_impl() : 0 ; }
bool is_initialized() const { return m_initialized ; }
protected :
void construct ( argument_type val )
{
m_storage = val ;
m_initialized = true ;
}
// Constructs in-place
// upon exception *this is always uninitialized
template<class... Args>
void construct ( in_place_init_t, Args&&... args )
{
m_storage = value_type( optional_detail::forward<Args>(args)... ) ;
m_initialized = true ;
}
template<class... Args>
void emplace_assign ( Args&&... args )
{
construct(in_place_init, optional_detail::forward<Args>(args)...);
}
template<class... Args>
explicit tc_optional_base ( in_place_init_t, Args&&... args )
:
m_initialized(false)
{
construct(in_place_init, optional_detail::forward<Args>(args)...);
}
template<class... Args>
explicit tc_optional_base ( in_place_init_if_t, bool cond, Args&&... args )
:
m_initialized(false)
{
if ( cond )
construct(in_place_init, optional_detail::forward<Args>(args)...);
}
#ifndef BOOST_OPTIONAL_NO_INPLACE_FACTORY_SUPPORT
// Constructs in-place using the given factory
template<class Expr>
void construct ( Expr&& factory, in_place_factory_base const* )
{
boost_optional_detail::construct<value_type>(factory, boost::addressof(m_storage));
m_initialized = true ;
}
// Constructs in-place using the given typed factory
template<class Expr>
void construct ( Expr&& factory, typed_in_place_factory_base const* )
{
factory.apply(boost::addressof(m_storage)) ;
m_initialized = true ;
}
template<class Expr>
void assign_expr_to_initialized ( Expr&& factory, in_place_factory_base const* tag )
{
destroy();
construct(factory,tag);
}
// Constructs in-place using the given typed factory
template<class Expr>
void assign_expr_to_initialized ( Expr&& factory, typed_in_place_factory_base const* tag )
{
destroy();
construct(factory,tag);
}
#endif
// Constructs using any expression implicitly convertible to the single argument
// of a one-argument T constructor.
// Converting constructions of optional<T> from optional<U> uses this function with
// 'Expr' being of type 'U' and relying on a converting constructor of T from U.
template<class Expr>
void construct ( Expr&& expr, void const* )
{
m_storage = value_type(optional_detail::forward<Expr>(expr)) ;
m_initialized = true ;
}
// Assigns using a form any expression implicitly convertible to the single argument
// of a T's assignment operator.
// Converting assignments of optional<T> from optional<U> uses this function with
// 'Expr' being of type 'U' and relying on a converting assignment of T from U.
template<class Expr>
void assign_expr_to_initialized ( Expr&& expr, void const* )
{
assign_value( optional_detail::forward<Expr>(expr) );
}
#ifdef BOOST_OPTIONAL_WEAK_OVERLOAD_RESOLUTION
// BCB5.64 (and probably lower versions) workaround.
// The in-place factories are supported by means of catch-all constructors
// and assignment operators (the functions are parameterized in terms of
// an arbitrary 'Expr' type)
// This compiler incorrectly resolves the overload set and sinks optional<T> and optional<U>
// to the 'Expr'-taking functions even though explicit overloads are present for them.
// Thus, the following overload is needed to properly handle the case when the 'lhs'
// is another optional.
//
// For VC<=70 compilers this workaround doesn't work because the compiler issues and error
// instead of choosing the wrong overload
//
// Notice that 'Expr' will be optional<T> or optional<U> (but not tc_optional_base<..>)
template<class Expr>
void construct ( Expr&& expr, optional_tag const* )
{
if ( expr.is_initialized() )
{
// An exception can be thrown here.
// It it happens, THIS will be left uninitialized.
m_storage = value_type(optional_detail::move(expr.get())) ;
m_initialized = true ;
}
}
#endif // defined BOOST_OPTIONAL_WEAK_OVERLOAD_RESOLUTION
void assign_value ( argument_type val ) { m_storage = val; }
void assign_value ( rval_reference_type val ) { m_storage = static_cast<rval_reference_type>(val); }
void destroy()
{
m_initialized = false;
}
reference_const_type get_impl() const { return m_storage ; }
reference_type get_impl() { return m_storage ; }
pointer_const_type get_ptr_impl() const { return boost::addressof(m_storage); }
pointer_type get_ptr_impl() { return boost::addressof(m_storage); }
private :
bool m_initialized ;
T m_storage ;
} ;

41
include/boost/optional/detail/optional_utility.hpp Normal file
View File

@@ -0,0 +1,41 @@
// Copyright (C) 2024 Ryan Malcolm Underwood.
//
// Use, modification, and distribution is subject to 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/optional for documentation.
//
// You are welcome to contact the author at:
// typenametea@gmail.com
#ifndef BOOST_OPTIONAL_OPTIONAL_DETAIL_OPTIONAL_UTILITY_RMU_06OCT2024_HPP
#define BOOST_OPTIONAL_OPTIONAL_DETAIL_OPTIONAL_UTILITY_RMU_06OCT2024_HPP
namespace boost {
namespace optional_detail {
// Workaround: forward and move aren't constexpr in C++11
template <class T>
inline constexpr T&& forward(typename boost::remove_reference<T>::type& t) noexcept
{
return static_cast<T&&>(t);
}
template <class T>
inline constexpr T&& forward(typename boost::remove_reference<T>::type&& t) noexcept
{
static_assert(!boost::is_lvalue_reference<T>::value, "Can not forward an rvalue as an lvalue.");
return static_cast<T&&>(t);
}
template <class T>
inline constexpr typename boost::remove_reference<T>::type&& move(T&& t) noexcept
{
return static_cast<typename boost::remove_reference<T>::type&&>(t);
}
} // namespace optional_detail
} // namespace boost
#endif

1175
include/boost/optional/optional.hpp Normal file
View File

File diff suppressed because it is too large Load Diff

41
include/boost/optional/optional_fwd.hpp Normal file
View File

@@ -0,0 +1,41 @@
// Copyright (C) 2003, 2008 Fernando Luis Cacciola Carballal.
// Copyright (C) 2016 Andrzej Krzemienski
//
// Use, modification, and distribution is subject to 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/optional for documentation.
//
// You are welcome to contact the author at:
// fernando_cacciola@hotmail.com
//
// Revisions:
// 10 May 2008 (added swap related forward declaration) Niels Dekker
//
#ifndef BOOST_OPTIONAL_OPTIONAL_FWD_FLC_19NOV2002_HPP
#define BOOST_OPTIONAL_OPTIONAL_FWD_FLC_19NOV2002_HPP
#include <boost/config.hpp>
namespace boost {
template<class T> class optional ;
// This forward is needed to refer to namespace scope swap from the member swap
template<class T> void swap ( optional<T>& , optional<T>& ) ;
template<class T> struct optional_swap_should_use_default_constructor ;
#ifndef BOOST_OPTIONAL_CONFIG_DONT_SPECIALIZE_OPTIONAL_REFS
template<class T> class optional<T&> ;
template<class T> void swap ( optional<T&>& , optional<T&>& ) BOOST_NOEXCEPT;
#endif
} // namespace boost
#endif

91
include/boost/optional/optional_io.hpp Normal file
View File

@@ -0,0 +1,91 @@
// Copyright (C) 2005, Fernando Luis Cacciola Carballal.
//
// Use, modification, and distribution is subject to 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/optional for documentation.
//
// You are welcome to contact the author at:
// fernando_cacciola@hotmail.com
//
#ifndef BOOST_OPTIONAL_OPTIONAL_IO_FLC_19NOV2002_HPP
#define BOOST_OPTIONAL_OPTIONAL_IO_FLC_19NOV2002_HPP
#ifndef BOOST_NO_IOSTREAM
#include <istream>
#include <ostream>
#include "boost/none.hpp"
#include "boost/optional/optional.hpp"
namespace boost
{
template<class CharType, class CharTrait>
inline
std::basic_ostream<CharType, CharTrait>&
operator<<(std::basic_ostream<CharType, CharTrait>& out, none_t)
{
if (out.good())
{
out << "--";
}
return out;
}
template<class CharType, class CharTrait, class T>
inline
std::basic_ostream<CharType, CharTrait>&
operator<<(std::basic_ostream<CharType, CharTrait>& out, optional<T> const& v)
{
if (out.good())
{
if (!v)
out << "--" ;
else out << ' ' << *v ;
}
return out;
}
template<class CharType, class CharTrait, class T>
inline
std::basic_istream<CharType, CharTrait>&
operator>>(std::basic_istream<CharType, CharTrait>& in, optional<T>& v)
{
if (in.good())
{
int d = in.get();
if (d == ' ')
{
T x;
in >> x;
v = optional_detail::move(x);
}
else
{
if (d == '-')
{
d = in.get();
if (d == '-')
{
v = none;
return in;
}
}
in.setstate( std::ios::failbit );
}
}
return in;
}
} // namespace boost
#endif // BOOST_NO_IOSTREAM
#endif