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PK �p!\ݕ � � optional_fwd.hppnu �[��� // 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 PK �p!\��A�� � optional.hppnu �[��� // Copyright (C) 2003, 2008 Fernando Luis Cacciola Carballal. // Copyright (C) 2014 - 2018 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: // 27 Apr 2008 (improved swap) Fernando Cacciola, Niels Dekker, Thorsten Ottosen // 05 May 2014 (Added move semantics) Andrzej Krzemienski // #ifndef BOOST_OPTIONAL_OPTIONAL_FLC_19NOV2002_HPP #define BOOST_OPTIONAL_OPTIONAL_FLC_19NOV2002_HPP #include <new> #include <iosfwd> #ifdef BOOST_OPTIONAL_DETAIL_USE_STD_TYPE_TRAITS # include <type_traits> #endif #include <boost/assert.hpp> #include <boost/core/addressof.hpp> #include <boost/core/enable_if.hpp> #include <boost/core/explicit_operator_bool.hpp> #include <boost/core/swap.hpp> #include <boost/optional/bad_optional_access.hpp> #include <boost/static_assert.hpp> #include <boost/throw_exception.hpp> #include <boost/type.hpp> #include <boost/type_traits/alignment_of.hpp> #include <boost/type_traits/conditional.hpp> #include <boost/type_traits/has_nothrow_constructor.hpp> #include <boost/type_traits/type_with_alignment.hpp> #include <boost/type_traits/remove_const.hpp> #include <boost/type_traits/remove_reference.hpp> #include <boost/type_traits/decay.hpp> #include <boost/type_traits/is_base_of.hpp> #include <boost/type_traits/is_const.hpp> #include <boost/type_traits/is_constructible.hpp> #include <boost/type_traits/is_lvalue_reference.hpp> #include <boost/type_traits/is_nothrow_move_assignable.hpp> #include <boost/type_traits/is_nothrow_move_constructible.hpp> #include <boost/type_traits/is_rvalue_reference.hpp> #include <boost/type_traits/is_same.hpp> #include <boost/type_traits/is_volatile.hpp> #include <boost/type_traits/is_scalar.hpp> #include <boost/move/utility.hpp> #include <boost/none.hpp> #include <boost/utility/compare_pointees.hpp> #include <boost/utility/result_of.hpp> #include <boost/optional/optional_fwd.hpp> #include <boost/optional/detail/optional_config.hpp> #include <boost/optional/detail/optional_factory_support.hpp> #include <boost/optional/detail/optional_aligned_storage.hpp> namespace boost { namespace optional_detail { template <typename T> struct optional_value_type { }; template <typename T> struct optional_value_type< ::boost::optional<T> > { typedef T type; }; }} // namespace boost::optional_detail #ifdef BOOST_OPTIONAL_CONFIG_USE_OLD_IMPLEMENTATION_OF_OPTIONAL #include <boost/optional/detail/old_optional_implementation.hpp> #else namespace boost { namespace optional_ns { // a tag for in-place initialization of contained value struct in_place_init_t { struct init_tag{}; explicit in_place_init_t(init_tag){} }; const in_place_init_t in_place_init ((in_place_init_t::init_tag())); // a tag for conditional in-place initialization of contained value struct in_place_init_if_t { struct init_tag{}; explicit in_place_init_if_t(init_tag){} }; const in_place_init_if_t in_place_init_if ((in_place_init_if_t::init_tag())); } // namespace optional_ns using optional_ns::in_place_init_t; using optional_ns::in_place_init; using optional_ns::in_place_init_if_t; using optional_ns::in_place_init_if; namespace optional_detail { struct init_value_tag {}; struct optional_tag {}; template<class T> class optional_base : public optional_tag { private : typedef aligned_storage<T> storage_type ; typedef optional_base<T> this_type ; protected : typedef T value_type ; protected: typedef T & reference_type ; typedef T const& reference_const_type ; #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES typedef T && rval_reference_type ; typedef T && reference_type_of_temporary_wrapper ; #endif typedef T * pointer_type ; typedef T const* pointer_const_type ; typedef T const& argument_type ; // Creates an optional<T> uninitialized. // No-throw optional_base() : m_initialized(false) {} // Creates an optional<T> uninitialized. // No-throw optional_base ( none_t ) : m_initialized(false) {} // Creates an optional<T> initialized with 'val'. // Can throw if T::T(T const&) does optional_base ( init_value_tag, argument_type val ) : m_initialized(false) { construct(val); } #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // move-construct an optional<T> initialized from an rvalue-ref to 'val'. // Can throw if T::T(T&&) does optional_base ( init_value_tag, rval_reference_type val ) : m_initialized(false) { construct( boost::move(val) ); } #endif // Creates an optional<T> initialized with 'val' IFF cond is true, otherwise creates an uninitialized optional<T>. // Can throw if T::T(T const&) does optional_base ( bool cond, argument_type val ) : m_initialized(false) { if ( cond ) construct(val); } #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // Creates an optional<T> initialized with 'move(val)' IFF cond is true, otherwise creates an uninitialized optional<T>. // Can throw if T::T(T &&) does optional_base ( bool cond, rval_reference_type val ) : m_initialized(false) { if ( cond ) construct(boost::move(val)); } #endif // Creates a deep copy of another optional<T> // Can throw if T::T(T const&) does optional_base ( optional_base const& rhs ) : m_initialized(false) { if ( rhs.is_initialized() ) construct(rhs.get_impl()); } #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // Creates a deep move of another optional<T> // Can throw if T::T(T&&) does optional_base ( optional_base&& rhs ) BOOST_NOEXCEPT_IF(::boost::is_nothrow_move_constructible<T>::value) : m_initialized(false) { if ( rhs.is_initialized() ) construct( boost::move(rhs.get_impl()) ); } #endif #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES template<class Expr, class PtrExpr> explicit optional_base ( Expr&& expr, PtrExpr const* tag ) : m_initialized(false) { construct(boost::forward<Expr>(expr),tag); } #else // This is used for both converting and in-place constructions. // Derived classes use the 'tag' to select the appropriate // implementation (the correct 'construct()' overload) template<class Expr> explicit optional_base ( Expr const& expr, Expr const* tag ) : m_initialized(false) { construct(expr,tag); } #endif optional_base& operator= ( optional_base const& rhs ) { this->assign(rhs); return *this; } #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES optional_base& operator= ( optional_base && rhs ) BOOST_NOEXCEPT_IF(::boost::is_nothrow_move_constructible<T>::value && ::boost::is_nothrow_move_assignable<T>::value) { this->assign(static_cast<optional_base&&>(rhs)); return *this; } #endif // No-throw (assuming T::~T() doesn't) ~optional_base() { destroy() ; } // Assigns from another optional<T> (deep-copies the rhs value) void assign ( optional_base const& rhs ) { if (is_initialized()) { if ( rhs.is_initialized() ) assign_value(rhs.get_impl()); else destroy(); } else { if ( rhs.is_initialized() ) construct(rhs.get_impl()); } } #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // Assigns from another optional<T> (deep-moves the rhs value) void assign ( optional_base&& rhs ) { if (is_initialized()) { if ( rhs.is_initialized() ) assign_value( boost::move(rhs.get_impl()) ); else destroy(); } else { if ( rhs.is_initialized() ) construct(boost::move(rhs.get_impl())); } } #endif // Assigns from another _convertible_ optional<U> (deep-copies the rhs value) template<class U> void assign ( optional<U> const& rhs ) { if (is_initialized()) { if ( rhs.is_initialized() ) #ifndef BOOST_OPTIONAL_CONFIG_RESTORE_ASSIGNMENT_OF_NONCONVERTIBLE_TYPES assign_value( rhs.get() ); #else assign_value( static_cast<value_type>(rhs.get()) ); #endif else destroy(); } else { if ( rhs.is_initialized() ) #ifndef BOOST_OPTIONAL_CONFIG_RESTORE_ASSIGNMENT_OF_NONCONVERTIBLE_TYPES construct(rhs.get()); #else construct(static_cast<value_type>(rhs.get())); #endif } } #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // 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 (is_initialized()) { if ( rhs.is_initialized() ) assign_value( static_cast<ref_type>(rhs.get()) ); else destroy(); } else { if ( rhs.is_initialized() ) construct(static_cast<ref_type>(rhs.get())); } } #endif // Assigns from a T (deep-copies the rhs value) void assign ( argument_type val ) { if (is_initialized()) assign_value(val); else construct(val); } #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // Assigns from a T (deep-moves the rhs value) void assign ( rval_reference_type val ) { if (is_initialized()) assign_value( boost::move(val) ); else construct( boost::move(val) ); } #endif // Assigns from "none", destroying the current value, if any, leaving this UNINITIALIZED // No-throw (assuming T::~T() doesn't) void assign ( none_t ) BOOST_NOEXCEPT { destroy(); } #ifndef BOOST_OPTIONAL_NO_INPLACE_FACTORY_SUPPORT #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES template<class Expr, class ExprPtr> void assign_expr ( Expr&& expr, ExprPtr const* tag ) { if (is_initialized()) assign_expr_to_initialized(boost::forward<Expr>(expr),tag); else construct(boost::forward<Expr>(expr),tag); } #else template<class Expr> void assign_expr ( Expr const& expr, Expr const* tag ) { if (is_initialized()) assign_expr_to_initialized(expr,tag); else construct(expr,tag); } #endif #endif public : // Destroys the current value, if any, leaving this UNINITIALIZED // No-throw (assuming T::~T() doesn't) void reset() BOOST_NOEXCEPT { destroy(); } // **DEPPRECATED** Replaces the current value -if any- with 'val' void reset ( argument_type val ) { 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 BOOST_NOEXCEPT { return m_initialized ; } protected : void construct ( argument_type val ) { ::new (m_storage.address()) value_type(val) ; m_initialized = true ; } #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES void construct ( rval_reference_type val ) { ::new (m_storage.address()) value_type( boost::move(val) ) ; m_initialized = true ; } #endif #if (!defined BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES) && (!defined BOOST_NO_CXX11_VARIADIC_TEMPLATES) // Constructs in-place // upon exception *this is always uninitialized template<class... Args> void construct ( in_place_init_t, Args&&... args ) { ::new (m_storage.address()) value_type( boost::forward<Args>(args)... ) ; m_initialized = true ; } template<class... Args> void emplace_assign ( Args&&... args ) { destroy(); construct(in_place_init, boost::forward<Args>(args)...); } template<class... Args> explicit optional_base ( in_place_init_t, Args&&... args ) : m_initialized(false) { construct(in_place_init, boost::forward<Args>(args)...); } template<class... Args> explicit optional_base ( in_place_init_if_t, bool cond, Args&&... args ) : m_initialized(false) { if ( cond ) construct(in_place_init, boost::forward<Args>(args)...); } #elif (!defined BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES) template<class Arg> void construct ( in_place_init_t, Arg&& arg ) { ::new (m_storage.address()) value_type( boost::forward<Arg>(arg) ); m_initialized = true ; } void construct ( in_place_init_t ) { ::new (m_storage.address()) value_type(); m_initialized = true ; } template<class Arg> void emplace_assign ( Arg&& arg ) { destroy(); construct(in_place_init, boost::forward<Arg>(arg)) ; } void emplace_assign () { destroy(); construct(in_place_init) ; } template<class Arg> explicit optional_base ( in_place_init_t, Arg&& arg ) : m_initialized(false) { construct(in_place_init, boost::forward<Arg>(arg)); } explicit optional_base ( in_place_init_t ) : m_initialized(false) { construct(in_place_init); } template<class Arg> explicit optional_base ( in_place_init_if_t, bool cond, Arg&& arg ) : m_initialized(false) { if ( cond ) construct(in_place_init, boost::forward<Arg>(arg)); } explicit optional_base ( in_place_init_if_t, bool cond ) : m_initialized(false) { if ( cond ) construct(in_place_init); } #else template<class Arg> void construct ( in_place_init_t, const Arg& arg ) { ::new (m_storage.address()) value_type( arg ); m_initialized = true ; } template<class Arg> void construct ( in_place_init_t, Arg& arg ) { ::new (m_storage.address()) value_type( arg ); m_initialized = true ; } void construct ( in_place_init_t ) { ::new (m_storage.address()) value_type(); m_initialized = true ; } template<class Arg> void emplace_assign ( const Arg& arg ) { destroy(); construct(in_place_init, arg); } template<class Arg> void emplace_assign ( Arg& arg ) { destroy(); construct(in_place_init, arg); } void emplace_assign () { destroy(); construct(in_place_init); } template<class Arg> explicit optional_base ( in_place_init_t, const Arg& arg ) : m_initialized(false) { construct(in_place_init, arg); } template<class Arg> explicit optional_base ( in_place_init_t, Arg& arg ) : m_initialized(false) { construct(in_place_init, arg); } explicit optional_base ( in_place_init_t ) : m_initialized(false) { construct(in_place_init); } template<class Arg> explicit optional_base ( in_place_init_if_t, bool cond, const Arg& arg ) : m_initialized(false) { if ( cond ) construct(in_place_init, arg); } template<class Arg> explicit optional_base ( in_place_init_if_t, bool cond, Arg& arg ) : m_initialized(false) { if ( cond ) construct(in_place_init, arg); } explicit optional_base ( in_place_init_if_t, bool cond ) : m_initialized(false) { if ( cond ) construct(in_place_init); } #endif #ifndef BOOST_OPTIONAL_NO_INPLACE_FACTORY_SUPPORT #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // 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, m_storage.address()); 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(m_storage.address()) ; 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); } #else // Constructs in-place using the given factory template<class Expr> void construct ( Expr const& factory, in_place_factory_base const* ) { boost_optional_detail::construct<value_type>(factory, m_storage.address()); m_initialized = true ; } // Constructs in-place using the given typed factory template<class Expr> void construct ( Expr const& factory, typed_in_place_factory_base const* ) { factory.apply(m_storage.address()) ; m_initialized = true ; } template<class Expr> void assign_expr_to_initialized ( Expr const& 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 const& factory, typed_in_place_factory_base const* tag ) { destroy(); construct(factory,tag); } #endif #endif #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // 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* ) { new (m_storage.address()) value_type(boost::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( boost::forward<Expr>(expr) ); } #else // 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 const& expr, void const* ) { new (m_storage.address()) value_type(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 const& expr, void const* ) { assign_value(expr); } #endif #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 dosen't work becasue the comnpiler issues and error // instead of choosing the wrong overload // #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // Notice that 'Expr' will be optional<T> or optional<U> (but not 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. new (m_storage.address()) value_type(boost::move(expr.get())) ; m_initialized = true ; } } #else // Notice that 'Expr' will be optional<T> or optional<U> (but not optional_base<..>) template<class Expr> void construct ( Expr const& expr, optional_tag const* ) { if ( expr.is_initialized() ) { // An exception can be thrown here. // It it happens, THIS will be left uninitialized. new (m_storage.address()) value_type(expr.get()) ; m_initialized = true ; } } #endif #endif // defined BOOST_OPTIONAL_WEAK_OVERLOAD_RESOLUTION void assign_value ( argument_type val ) { get_impl() = val; } #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES void assign_value ( rval_reference_type val ) { get_impl() = static_cast<rval_reference_type>(val); } #endif void destroy() { if ( m_initialized ) destroy_impl() ; } reference_const_type get_impl() const { return m_storage.ref() ; } reference_type get_impl() { return m_storage.ref() ; } pointer_const_type get_ptr_impl() const { return m_storage.ptr_ref(); } pointer_type get_ptr_impl() { return m_storage.ptr_ref(); } private : #if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1900)) void destroy_impl ( ) { m_storage.ptr_ref()->~T() ; m_initialized = false ; } #else void destroy_impl ( ) { m_storage.ref().T::~T() ; m_initialized = false ; } #endif bool m_initialized ; storage_type m_storage ; } ; #include <boost/optional/detail/optional_trivially_copyable_base.hpp> // definition of metafunction is_optional_val_init_candidate template <typename U> struct is_optional_related : boost::conditional< boost::is_base_of<optional_detail::optional_tag, BOOST_DEDUCED_TYPENAME boost::decay<U>::type>::value || boost::is_same<BOOST_DEDUCED_TYPENAME boost::decay<U>::type, none_t>::value || boost::is_same<BOOST_DEDUCED_TYPENAME boost::decay<U>::type, in_place_init_t>::value || boost::is_same<BOOST_DEDUCED_TYPENAME boost::decay<U>::type, in_place_init_if_t>::value, boost::true_type, boost::false_type>::type {}; #if !defined(BOOST_OPTIONAL_DETAIL_NO_IS_CONSTRUCTIBLE_TRAIT) template <typename T, typename U> struct is_convertible_to_T_or_factory : boost::conditional< boost::is_base_of<boost::in_place_factory_base, BOOST_DEDUCED_TYPENAME boost::decay<U>::type>::value || boost::is_base_of<boost::typed_in_place_factory_base, BOOST_DEDUCED_TYPENAME boost::decay<U>::type>::value || (boost::is_constructible<T, U&&>::value && !boost::is_same<T, BOOST_DEDUCED_TYPENAME boost::decay<U>::type>::value) , boost::true_type, boost::false_type>::type {}; template <typename T, typename U> struct is_optional_constructible : boost::is_constructible<T, U> {}; #else template <typename, typename> struct is_convertible_to_T_or_factory : boost::true_type {}; template <typename T, typename U> struct is_optional_constructible : boost::true_type {}; #endif // is_convertible condition template <typename T, typename U, bool = is_optional_related<U>::value> struct is_optional_val_init_candidate : boost::false_type {}; template <typename T, typename U> struct is_optional_val_init_candidate<T, U, false> : boost::conditional< is_convertible_to_T_or_factory<T, U>::value , boost::true_type, boost::false_type>::type {}; } // namespace optional_detail namespace optional_config { template <typename T> struct optional_uses_direct_storage_for : boost::conditional<(boost::is_scalar<T>::value && !boost::is_const<T>::value && !boost::is_volatile<T>::value) , boost::true_type, boost::false_type>::type {}; } // namespace optional_config #ifndef BOOST_OPTIONAL_DETAIL_NO_DIRECT_STORAGE_SPEC # define BOOST_OPTIONAL_BASE_TYPE(T) boost::conditional< optional_config::optional_uses_direct_storage_for<T>::value, \ optional_detail::tc_optional_base<T>, \ optional_detail::optional_base<T> \ >::type #else # define BOOST_OPTIONAL_BASE_TYPE(T) optional_detail::optional_base<T> #endif template<class T> class optional : public BOOST_OPTIONAL_BASE_TYPE(T) { typedef typename BOOST_OPTIONAL_BASE_TYPE(T) base ; public : typedef optional<T> this_type ; typedef BOOST_DEDUCED_TYPENAME base::value_type value_type ; typedef BOOST_DEDUCED_TYPENAME base::reference_type reference_type ; typedef BOOST_DEDUCED_TYPENAME base::reference_const_type reference_const_type ; #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES typedef BOOST_DEDUCED_TYPENAME base::rval_reference_type rval_reference_type ; typedef BOOST_DEDUCED_TYPENAME base::reference_type_of_temporary_wrapper reference_type_of_temporary_wrapper ; #endif typedef BOOST_DEDUCED_TYPENAME base::pointer_type pointer_type ; typedef BOOST_DEDUCED_TYPENAME base::pointer_const_type pointer_const_type ; typedef BOOST_DEDUCED_TYPENAME base::argument_type argument_type ; // Creates an optional<T> uninitialized. // No-throw optional() BOOST_NOEXCEPT : base() {} // Creates an optional<T> uninitialized. // No-throw optional( none_t none_ ) BOOST_NOEXCEPT : base(none_) {} // Creates an optional<T> initialized with 'val'. // Can throw if T::T(T const&) does optional ( argument_type val ) : base(optional_detail::init_value_tag(), val) {} #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // Creates an optional<T> initialized with 'move(val)'. // Can throw if T::T(T &&) does optional ( rval_reference_type val ) : base(optional_detail::init_value_tag(), boost::forward<T>(val)) {} #endif // Creates an optional<T> initialized with 'val' IFF cond is true, otherwise creates an uninitialized optional. // Can throw if T::T(T const&) does optional ( bool cond, argument_type val ) : base(cond,val) {} #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES /// Creates an optional<T> initialized with 'val' IFF cond is true, otherwise creates an uninitialized optional. // Can throw if T::T(T &&) does optional ( bool cond, rval_reference_type val ) : base( cond, boost::forward<T>(val) ) {} #endif // NOTE: MSVC needs templated versions first // Creates a deep copy of another convertible optional<U> // Requires a valid conversion from U to T. // Can throw if T::T(U const&) does template<class U> explicit optional ( optional<U> const& rhs #ifndef BOOST_OPTIONAL_DETAIL_NO_SFINAE_FRIENDLY_CONSTRUCTORS ,BOOST_DEDUCED_TYPENAME boost::enable_if< optional_detail::is_optional_constructible<T, U const&>, bool>::type = true #endif ) : base() { if ( rhs.is_initialized() ) this->construct(rhs.get()); } #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // Creates a deep move of another convertible optional<U> // Requires a valid conversion from U to T. // Can throw if T::T(U&&) does template<class U> explicit optional ( optional<U> && rhs #ifndef BOOST_OPTIONAL_DETAIL_NO_SFINAE_FRIENDLY_CONSTRUCTORS ,BOOST_DEDUCED_TYPENAME boost::enable_if< optional_detail::is_optional_constructible<T, U>, bool>::type = true #endif ) : base() { if ( rhs.is_initialized() ) this->construct( boost::move(rhs.get()) ); } #endif #ifndef BOOST_OPTIONAL_NO_INPLACE_FACTORY_SUPPORT // Creates an optional<T> with an expression which can be either // (a) An instance of InPlaceFactory (i.e. in_place(a,b,...,n); // (b) An instance of TypedInPlaceFactory ( i.e. in_place<T>(a,b,...,n); // (c) Any expression implicitly convertible to the single type // of a one-argument T's constructor. // (d*) Weak compilers (BCB) might also resolved Expr as optional<T> and optional<U> // even though explicit overloads are present for these. // Depending on the above some T ctor is called. // Can throw if the resolved T ctor throws. #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES template<class Expr> explicit optional ( Expr&& expr, BOOST_DEDUCED_TYPENAME boost::enable_if< optional_detail::is_optional_val_init_candidate<T, Expr>, bool>::type = true ) : base(boost::forward<Expr>(expr),boost::addressof(expr)) {} #else template<class Expr> explicit optional ( Expr const& expr ) : base(expr,boost::addressof(expr)) {} #endif // !defined BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES #endif // !defined BOOST_OPTIONAL_NO_INPLACE_FACTORY_SUPPORT // Creates a deep copy of another optional<T> // Can throw if T::T(T const&) does #ifndef BOOST_OPTIONAL_DETAIL_NO_DEFAULTED_MOVE_FUNCTIONS optional ( optional const& ) = default; #else optional ( optional const& rhs ) : base( static_cast<base const&>(rhs) ) {} #endif #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // Creates a deep move of another optional<T> // Can throw if T::T(T&&) does #ifndef BOOST_OPTIONAL_DETAIL_NO_DEFAULTED_MOVE_FUNCTIONS optional ( optional && ) = default; #else optional ( optional && rhs ) BOOST_NOEXCEPT_IF(::boost::is_nothrow_move_constructible<T>::value) : base( boost::move(rhs) ) {} #endif #endif #if BOOST_WORKAROUND(_MSC_VER, <= 1600) // On old MSVC compilers the implicitly declared dtor is not called ~optional() {} #endif #if !defined(BOOST_OPTIONAL_NO_INPLACE_FACTORY_SUPPORT) && !defined(BOOST_OPTIONAL_WEAK_OVERLOAD_RESOLUTION) // Assigns from an expression. See corresponding constructor. // Basic Guarantee: If the resolved T ctor throws, this is left UNINITIALIZED #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES template<class Expr> BOOST_DEDUCED_TYPENAME boost::enable_if<optional_detail::is_optional_val_init_candidate<T, Expr>, optional&>::type operator= ( Expr&& expr ) { this->assign_expr(boost::forward<Expr>(expr),boost::addressof(expr)); return *this ; } #else template<class Expr> optional& operator= ( Expr const& expr ) { this->assign_expr(expr,boost::addressof(expr)); return *this ; } #endif // !defined BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES #endif // !defined(BOOST_OPTIONAL_NO_INPLACE_FACTORY_SUPPORT) && !defined(BOOST_OPTIONAL_WEAK_OVERLOAD_RESOLUTION) // Copy-assigns from another convertible optional<U> (converts && deep-copies the rhs value) // Requires a valid conversion from U to T. // Basic Guarantee: If T::T( U const& ) throws, this is left UNINITIALIZED template<class U> optional& operator= ( optional<U> const& rhs ) { this->assign(rhs); return *this ; } #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // Move-assigns from another convertible optional<U> (converts && deep-moves the rhs value) // Requires a valid conversion from U to T. // Basic Guarantee: If T::T( U && ) throws, this is left UNINITIALIZED template<class U> optional& operator= ( optional<U> && rhs ) { this->assign(boost::move(rhs)); return *this ; } #endif // Assigns from another optional<T> (deep-copies the rhs value) // Basic Guarantee: If T::T( T const& ) throws, this is left UNINITIALIZED // (NOTE: On BCB, this operator is not actually called and left is left UNMODIFIED in case of a throw) #ifndef BOOST_OPTIONAL_DETAIL_NO_DEFAULTED_MOVE_FUNCTIONS optional& operator= ( optional const& rhs ) = default; #else optional& operator= ( optional const& rhs ) { this->assign( static_cast<base const&>(rhs) ) ; return *this ; } #endif #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // Assigns from another optional<T> (deep-moves the rhs value) #ifndef BOOST_OPTIONAL_DETAIL_NO_DEFAULTED_MOVE_FUNCTIONS optional& operator= ( optional && ) = default; #else optional& operator= ( optional && rhs ) BOOST_NOEXCEPT_IF(::boost::is_nothrow_move_constructible<T>::value && ::boost::is_nothrow_move_assignable<T>::value) { this->assign( static_cast<base &&>(rhs) ) ; return *this ; } #endif #endif // BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES #ifndef BOOST_NO_CXX11_UNIFIED_INITIALIZATION_SYNTAX // Assigns from a T (deep-moves/copies the rhs value) template <typename T_> BOOST_DEDUCED_TYPENAME boost::enable_if<boost::is_same<T, BOOST_DEDUCED_TYPENAME boost::decay<T_>::type>, optional&>::type operator= ( T_&& val ) { this->assign( boost::forward<T_>(val) ) ; return *this ; } #else // Assigns from a T (deep-copies the rhs value) // Basic Guarantee: If T::( T const& ) throws, this is left UNINITIALIZED optional& operator= ( argument_type val ) { this->assign( val ) ; return *this ; } #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // Assigns from a T (deep-moves the rhs value) optional& operator= ( rval_reference_type val ) { this->assign( boost::move(val) ) ; return *this ; } #endif #endif // BOOST_NO_CXX11_UNIFIED_INITIALIZATION_SYNTAX // Assigns from a "none" // Which destroys the current value, if any, leaving this UNINITIALIZED // No-throw (assuming T::~T() doesn't) optional& operator= ( none_t none_ ) BOOST_NOEXCEPT { this->assign( none_ ) ; return *this ; } #if (!defined BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES) && (!defined BOOST_NO_CXX11_VARIADIC_TEMPLATES) // Constructs in-place // upon exception *this is always uninitialized template<class... Args> void emplace ( Args&&... args ) { this->emplace_assign( boost::forward<Args>(args)... ); } template<class... Args> explicit optional ( in_place_init_t, Args&&... args ) : base( in_place_init, boost::forward<Args>(args)... ) {} template<class... Args> explicit optional ( in_place_init_if_t, bool cond, Args&&... args ) : base( in_place_init_if, cond, boost::forward<Args>(args)... ) {} #elif (!defined BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES) template<class Arg> void emplace ( Arg&& arg ) { this->emplace_assign( boost::forward<Arg>(arg) ); } void emplace () { this->emplace_assign(); } template<class Args> explicit optional ( in_place_init_t, Args&& args ) : base( in_place_init, boost::forward<Args>(args) ) {} explicit optional ( in_place_init_t ) : base( in_place_init ) {} template<class Args> explicit optional ( in_place_init_if_t, bool cond, Args&& args ) : base( in_place_init_if, cond, boost::forward<Args>(args) ) {} explicit optional ( in_place_init_if_t, bool cond ) : base( in_place_init_if, cond ) {} #else template<class Arg> void emplace ( const Arg& arg ) { this->emplace_assign( arg ); } template<class Arg> void emplace ( Arg& arg ) { this->emplace_assign( arg ); } void emplace () { this->emplace_assign(); } template<class Arg> explicit optional ( in_place_init_t, const Arg& arg ) : base( in_place_init, arg ) {} template<class Arg> explicit optional ( in_place_init_t, Arg& arg ) : base( in_place_init, arg ) {} explicit optional ( in_place_init_t ) : base( in_place_init ) {} template<class Arg> explicit optional ( in_place_init_if_t, bool cond, const Arg& arg ) : base( in_place_init_if, cond, arg ) {} template<class Arg> explicit optional ( in_place_init_if_t, bool cond, Arg& arg ) : base( in_place_init_if, cond, arg ) {} explicit optional ( in_place_init_if_t, bool cond ) : base( in_place_init_if, cond ) {} #endif void swap( optional & arg ) BOOST_NOEXCEPT_IF(::boost::is_nothrow_move_constructible<T>::value && ::boost::is_nothrow_move_assignable<T>::value) { // allow for Koenig lookup boost::swap(*this, arg); } // Returns a reference to the value if this is initialized, otherwise, // the behaviour is UNDEFINED // No-throw reference_const_type get() const { BOOST_ASSERT(this->is_initialized()) ; return this->get_impl(); } reference_type get() { BOOST_ASSERT(this->is_initialized()) ; return this->get_impl(); } // Returns a copy of the value if this is initialized, 'v' otherwise reference_const_type get_value_or ( reference_const_type v ) const { return this->is_initialized() ? get() : v ; } reference_type get_value_or ( reference_type v ) { return this->is_initialized() ? get() : v ; } // Returns a pointer to the value if this is initialized, otherwise, // the behaviour is UNDEFINED // No-throw pointer_const_type operator->() const { BOOST_ASSERT(this->is_initialized()) ; return this->get_ptr_impl() ; } pointer_type operator->() { BOOST_ASSERT(this->is_initialized()) ; return this->get_ptr_impl() ; } // Returns a reference to the value if this is initialized, otherwise, // the behaviour is UNDEFINED // No-throw #if (!defined BOOST_NO_CXX11_REF_QUALIFIERS) && (!defined BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES) reference_const_type operator *() const& { return this->get() ; } reference_type operator *() & { return this->get() ; } reference_type_of_temporary_wrapper operator *() && { return boost::move(this->get()) ; } #else reference_const_type operator *() const { return this->get() ; } reference_type operator *() { return this->get() ; } #endif // !defined BOOST_NO_CXX11_REF_QUALIFIERS #if (!defined BOOST_NO_CXX11_REF_QUALIFIERS) && (!defined BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES) reference_const_type value() const& { if (this->is_initialized()) return this->get() ; else throw_exception(bad_optional_access()); } reference_type value() & { if (this->is_initialized()) return this->get() ; else throw_exception(bad_optional_access()); } reference_type_of_temporary_wrapper value() && { if (this->is_initialized()) return boost::move(this->get()) ; else throw_exception(bad_optional_access()); } #else reference_const_type value() const { if (this->is_initialized()) return this->get() ; else throw_exception(bad_optional_access()); } reference_type value() { if (this->is_initialized()) return this->get() ; else throw_exception(bad_optional_access()); } #endif #ifndef BOOST_NO_CXX11_REF_QUALIFIERS template <class U> value_type value_or ( U&& v ) const& { if (this->is_initialized()) return get(); else return boost::forward<U>(v); } template <class U> value_type value_or ( U&& v ) && { if (this->is_initialized()) return boost::move(get()); else return boost::forward<U>(v); } #elif !defined BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES template <class U> value_type value_or ( U&& v ) const { if (this->is_initialized()) return get(); else return boost::forward<U>(v); } #else template <class U> value_type value_or ( U const& v ) const { if (this->is_initialized()) return get(); else return v; } template <class U> value_type value_or ( U& v ) const { if (this->is_initialized()) return get(); else return v; } #endif #if (!defined BOOST_NO_CXX11_REF_QUALIFIERS) && (!defined BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES) template <typename F> value_type value_or_eval ( F f ) const& { if (this->is_initialized()) return get(); else return f(); } template <typename F> value_type value_or_eval ( F f ) && { if (this->is_initialized()) return boost::move(get()); else return f(); } template <typename F> optional<typename boost::result_of<F(reference_type)>::type> map(F f) & { if (this->has_value()) return f(get()); else return none; } template <typename F> optional<typename boost::result_of<F(reference_const_type)>::type> map(F f) const& { if (this->has_value()) return f(get()); else return none; } template <typename F> optional<typename boost::result_of<F(reference_type_of_temporary_wrapper)>::type> map(F f) && { if (this->has_value()) return f(boost::move(this->get())); else return none; } template <typename F> optional<typename optional_detail::optional_value_type<typename boost::result_of<F(reference_type)>::type>::type> flat_map(F f) & { if (this->has_value()) return f(get()); else return none; } template <typename F> optional<typename optional_detail::optional_value_type<typename boost::result_of<F(reference_const_type)>::type>::type> flat_map(F f) const& { if (this->has_value()) return f(get()); else return none; } template <typename F> optional<typename optional_detail::optional_value_type<typename boost::result_of<F(reference_type_of_temporary_wrapper)>::type>::type> flat_map(F f) && { if (this->has_value()) return f(boost::move(get())); else return none; } #else template <typename F> value_type value_or_eval ( F f ) const { if (this->is_initialized()) return get(); else return f(); } template <typename F> optional<typename boost::result_of<F(reference_type)>::type> map(F f) { if (this->has_value()) return f(get()); else return none; } template <typename F> optional<typename boost::result_of<F(reference_const_type)>::type> map(F f) const { if (this->has_value()) return f(get()); else return none; } template <typename F> optional<typename optional_detail::optional_value_type<typename boost::result_of<F(reference_type)>::type>::type> flat_map(F f) { if (this->has_value()) return f(get()); else return none; } template <typename F> optional<typename optional_detail::optional_value_type<typename boost::result_of<F(reference_const_type)>::type>::type> flat_map(F f) const { if (this->has_value()) return f(get()); else return none; } #endif bool has_value() const BOOST_NOEXCEPT { return this->is_initialized() ; } bool operator!() const BOOST_NOEXCEPT { return !this->is_initialized() ; } BOOST_EXPLICIT_OPERATOR_BOOL_NOEXCEPT() } ; } // namespace boost #endif // BOOST_OPTIONAL_CONFIG_USE_OLD_IMPLEMENTATION_OF_OPTIONAL namespace boost { #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES template<class T> class optional<T&&> { BOOST_STATIC_ASSERT_MSG(sizeof(T) == 0, "Optional rvalue references are illegal."); } ; #endif } // namespace boost #ifndef BOOST_OPTIONAL_CONFIG_DONT_SPECIALIZE_OPTIONAL_REFS # include <boost/optional/detail/optional_reference_spec.hpp> #endif namespace boost { #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES template<class T> inline optional<BOOST_DEDUCED_TYPENAME boost::decay<T>::type> make_optional ( T && v ) { return optional<BOOST_DEDUCED_TYPENAME boost::decay<T>::type>(boost::forward<T>(v)); } // Returns optional<T>(cond,v) template<class T> inline optional<BOOST_DEDUCED_TYPENAME boost::decay<T>::type> make_optional ( bool cond, T && v ) { return optional<BOOST_DEDUCED_TYPENAME boost::decay<T>::type>(cond,boost::forward<T>(v)); } #else // Returns optional<T>(v) template<class T> inline optional<T> make_optional ( T const& v ) { return optional<T>(v); } // Returns optional<T>(cond,v) template<class T> inline optional<T> make_optional ( bool cond, T const& v ) { return optional<T>(cond,v); } #endif // BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // Returns a reference to the value if this is initialized, otherwise, the behaviour is UNDEFINED. // No-throw template<class T> inline BOOST_DEDUCED_TYPENAME optional<T>::reference_const_type get ( optional<T> const& opt ) { return opt.get() ; } template<class T> inline BOOST_DEDUCED_TYPENAME optional<T>::reference_type get ( optional<T>& opt ) { return opt.get() ; } // Returns a pointer to the value if this is initialized, otherwise, returns NULL. // No-throw template<class T> inline BOOST_DEDUCED_TYPENAME optional<T>::pointer_const_type get ( optional<T> const* opt ) { return opt->get_ptr() ; } template<class T> inline BOOST_DEDUCED_TYPENAME optional<T>::pointer_type get ( optional<T>* opt ) { return opt->get_ptr() ; } // Returns a reference to the value if this is initialized, otherwise, the behaviour is UNDEFINED. // No-throw template<class T> inline BOOST_DEDUCED_TYPENAME optional<T>::reference_const_type get_optional_value_or ( optional<T> const& opt, BOOST_DEDUCED_TYPENAME optional<T>::reference_const_type v ) { return opt.get_value_or(v) ; } template<class T> inline BOOST_DEDUCED_TYPENAME optional<T>::reference_type get_optional_value_or ( optional<T>& opt, BOOST_DEDUCED_TYPENAME optional<T>::reference_type v ) { return opt.get_value_or(v) ; } // Returns a pointer to the value if this is initialized, otherwise, returns NULL. // No-throw template<class T> inline BOOST_DEDUCED_TYPENAME optional<T>::pointer_const_type get_pointer ( optional<T> const& opt ) { return opt.get_ptr() ; } template<class T> inline BOOST_DEDUCED_TYPENAME optional<T>::pointer_type get_pointer ( optional<T>& opt ) { return opt.get_ptr() ; } } // namespace boost namespace boost { // The following declaration prevents a bug where operator safe-bool is used upon streaming optional object if you forget the IO header. template<class CharType, class CharTrait> std::basic_ostream<CharType, CharTrait>& operator<<(std::basic_ostream<CharType, CharTrait>& os, optional_detail::optional_tag const&) { BOOST_STATIC_ASSERT_MSG(sizeof(CharType) == 0, "If you want to output boost::optional, include header <boost/optional/optional_io.hpp>"); return os; } } // namespace boost #include <boost/optional/detail/optional_relops.hpp> #include <boost/optional/detail/optional_swap.hpp> #endif // header guard PK �p!\t�|_� � optional_io.hppnu �[��� // 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 #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; #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES v = boost::move(x); #else v = x; #endif } else { if (d == '-') { d = in.get(); if (d == '-') { v = none; return in; } } in.setstate( std::ios::failbit ); } } return in; } } // namespace boost #endif PK �p!\��;� � # detail/optional_factory_support.hppnu �[��� // 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 PK �p!\��Nx x # detail/optional_aligned_storage.hppnu �[��� // 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 { 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 *ptr_ref(); } T & ref() { return *ptr_ref(); } } ; } // namespace optional_detail } // namespace boost #endif // header guard PK �p!\�;�� � detail/optional_relops.hppnu �[��� // 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_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_pointess() in generic code instead. // // 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 less_pointees(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 equal_pointees(x, optional<T>(y)); } template<class T> inline bool operator < ( optional<T> const& x, T const& y ) { return less_pointees(x, optional<T>(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 equal_pointees( optional<T>(x), y ); } template<class T> inline bool operator < ( T const& x, optional<T> const& y ) { return less_pointees( optional<T>(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& x, none_t ) { return less_pointees(x,optional<T>() ); } 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 less_pointees(optional<T>() ,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 PK �p!\q�~� � detail/optional_config.hppnu �[��� // 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/detail/workaround.hpp> #if (defined BOOST_NO_CXX11_RVALUE_REFERENCES) || (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 MSCV 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__) && (!defined BOOST_NO_CXX11_RVALUE_REFERENCES) // 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 suport for defaulting move operations // (some older compilers implement rvalue references, // defaulted funcitons 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 #endif // header guard PK �p!\J9n@� � detail/experimental_traits.hppnu �[��� // 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/config.hpp> #include <boost/detail/workaround.hpp> #include <boost/predef.h> #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_CONSTRUCTOR # 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 #elif BOOST_WORKAROUND(BOOST_GCC, < 50000) # define BOOST_OPTIONAL_DETAIL_NO_SPEC_FOR_TRIVIAL_TYPES #endif // GCC 5 or higher, or clang with libc++ or clang with libstdc++ 5 or higher #if __cplusplus >= 201103L # if BOOST_WORKAROUND(BOOST_GCC, >= 50000) # define BOOST_OPTIONAL_DETAIL_USE_STD_TYPE_TRAITS # elif (defined BOOST_CLANG) # if BOOST_LIB_STD_CXX > 0 # define BOOST_OPTIONAL_DETAIL_USE_STD_TYPE_TRAITS # elif BOOST_LIB_STD_GNU >= 441200023 && BOOST_LIB_STD_GNU != 450600023 && BOOST_LIB_STD_GNU != 450600026 && BOOST_LIB_STD_GNU != 460800003 && BOOST_LIB_STD_GNU != 450400026 && BOOST_LIB_STD_GNU != 460700026 # define BOOST_OPTIONAL_DETAIL_USE_STD_TYPE_TRAITS # endif # endif #endif #ifndef BOOST_OPTIONAL_DETAIL_USE_STD_TYPE_TRAITS # define BOOST_OPTIONAL_DETAIL_HAS_TRIVIAL_CTOR(T) BOOST_HAS_TRIVIAL_CONSTRUCTOR(T) #else # include <type_traits> # define BOOST_OPTIONAL_DETAIL_HAS_TRIVIAL_CTOR(T) std::is_trivially_default_constructible<T>::value #endif namespace boost { namespace optional_detail { #ifndef BOOST_OPTIONAL_DETAIL_NO_SPEC_FOR_TRIVIAL_TYPES template <typename T> struct is_type_trivially_copyable : 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_type_trivially_copyable : 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 #ifndef BOOST_OPTIONAL_DETAIL_NO_SPEC_FOR_TRIVIAL_TYPES template <typename T> struct optional_uses_direct_storage_for_ : boost::conditional< (is_type_trivially_copyable<T>::value && BOOST_OPTIONAL_DETAIL_HAS_TRIVIAL_CTOR(T)) || (boost::is_scalar<T>::value && !boost::is_const<T>::value && !boost::is_volatile<T>::value) , boost::true_type, boost::false_type>::type {}; #else template <typename T> struct optional_uses_direct_storage_for_ : 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 PK �p!\�u�0� � detail/optional_swap.hppnu �[��� // 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/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.Utility.Swap will take care of ADL and workarounds for broken compilers boost::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_) boost::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::swap(*x, *y))) { if (x) { if (y) { boost::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_NO_CXX11_RVALUE_REFERENCES) && (!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::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 PK �p!\��TG�8 �8 + detail/optional_trivially_copyable_base.hppnu �[��� // trivilally-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 ; #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES typedef T && rval_reference_type ; typedef T && reference_type_of_temporary_wrapper ; #endif typedef T * pointer_type ; typedef T const* pointer_const_type ; typedef T const& argument_type ; tc_optional_base() : m_initialized(false) {} tc_optional_base ( none_t ) : m_initialized(false) {} 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; #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES template<class Expr, class PtrExpr> explicit tc_optional_base ( Expr&& expr, PtrExpr const* tag ) : m_initialized(false) { construct(boost::forward<Expr>(expr),tag); } #else // This is used for both converting and in-place constructions. // Derived classes use the 'tag' to select the appropriate // implementation (the correct 'construct()' overload) template<class Expr> explicit tc_optional_base ( Expr const& expr, Expr const* tag ) : m_initialized(false) { construct(expr,tag); } #endif // 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(); } #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // 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(); } #endif void assign ( argument_type val ) { construct(val); } void assign ( none_t ) { destroy(); } #ifndef BOOST_OPTIONAL_NO_INPLACE_FACTORY_SUPPORT #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES template<class Expr, class ExprPtr> void assign_expr ( Expr&& expr, ExprPtr const* tag ) { construct(boost::forward<Expr>(expr),tag); } #else template<class Expr> void assign_expr ( Expr const& expr, Expr const* tag ) { construct(expr,tag); } #endif #endif public : // Destroys the current value, if any, leaving this UNINITIALIZED // No-throw (assuming T::~T() doesn't) void reset() BOOST_NOEXCEPT { destroy(); } // **DEPPRECATED** 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 ; } #if (!defined BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES) && (!defined BOOST_NO_CXX11_VARIADIC_TEMPLATES) // Constructs in-place // upon exception *this is always uninitialized template<class... Args> void construct ( in_place_init_t, Args&&... args ) { m_storage = value_type( boost::forward<Args>(args)... ) ; m_initialized = true ; } template<class... Args> void emplace_assign ( Args&&... args ) { construct(in_place_init, boost::forward<Args>(args)...); } template<class... Args> explicit tc_optional_base ( in_place_init_t, Args&&... args ) : m_initialized(false) { construct(in_place_init, boost::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, boost::forward<Args>(args)...); } #elif (!defined BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES) template<class Arg> void construct ( in_place_init_t, Arg&& arg ) { m_storage = value_type( boost::forward<Arg>(arg) ); m_initialized = true ; } void construct ( in_place_init_t ) { m_storage = value_type(); m_initialized = true ; } template<class Arg> void emplace_assign ( Arg&& arg ) { construct(in_place_init, boost::forward<Arg>(arg)) ; } void emplace_assign () { construct(in_place_init) ; } template<class Arg> explicit tc_optional_base ( in_place_init_t, Arg&& arg ) : m_initialized(false) { construct(in_place_init, boost::forward<Arg>(arg)); } explicit tc_optional_base ( in_place_init_t ) : m_initialized(false), m_storage() {} template<class Arg> explicit tc_optional_base ( in_place_init_if_t, bool cond, Arg&& arg ) : m_initialized(false) { if ( cond ) construct(in_place_init, boost::forward<Arg>(arg)); } explicit tc_optional_base ( in_place_init_if_t, bool cond ) : m_initialized(false) { if ( cond ) construct(in_place_init); } #else template<class Arg> void construct ( in_place_init_t, const Arg& arg ) { m_storage = value_type( arg ); m_initialized = true ; } template<class Arg> void construct ( in_place_init_t, Arg& arg ) { m_storage = value_type( arg ); m_initialized = true ; } void construct ( in_place_init_t ) { m_storage = value_type(); m_initialized = true ; } template<class Arg> void emplace_assign ( const Arg& arg ) { construct(in_place_init, arg); } template<class Arg> void emplace_assign ( Arg& arg ) { construct(in_place_init, arg); } void emplace_assign () { construct(in_place_init); } template<class Arg> explicit tc_optional_base ( in_place_init_t, const Arg& arg ) : m_initialized(false) { construct(in_place_init, arg); } template<class Arg> explicit tc_optional_base ( in_place_init_t, Arg& arg ) : m_initialized(false) { construct(in_place_init, arg); } explicit tc_optional_base ( in_place_init_t ) : m_initialized(false) { construct(in_place_init); } template<class Arg> explicit tc_optional_base ( in_place_init_if_t, bool cond, const Arg& arg ) : m_initialized(false) { if ( cond ) construct(in_place_init, arg); } template<class Arg> explicit tc_optional_base ( in_place_init_if_t, bool cond, Arg& arg ) : m_initialized(false) { if ( cond ) construct(in_place_init, arg); } explicit tc_optional_base ( in_place_init_if_t, bool cond ) : m_initialized(false) { if ( cond ) construct(in_place_init); } #endif #ifndef BOOST_OPTIONAL_NO_INPLACE_FACTORY_SUPPORT #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // 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); } #else // Constructs in-place using the given factory template<class Expr> void construct ( Expr const& 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 const& 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 const& 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 const& factory, typed_in_place_factory_base const* tag ) { destroy(); construct(factory,tag); } #endif #endif #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // 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(boost::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( boost::forward<Expr>(expr) ); } #else // 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 const& expr, void const* ) { m_storage = value_type(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 const& expr, void const* ) { assign_value(expr); } #endif #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 dosen't work becasue the comnpiler issues and error // instead of choosing the wrong overload // #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // 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(boost::move(expr.get())) ; m_initialized = true ; } } #else // Notice that 'Expr' will be optional<T> or optional<U> (but not tc_optional_base<..>) template<class Expr> void construct ( Expr const& 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(expr.get()) ; m_initialized = true ; } } #endif #endif // defined BOOST_OPTIONAL_WEAK_OVERLOAD_RESOLUTION void assign_value ( argument_type val ) { m_storage = val; } #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES void assign_value ( rval_reference_type val ) { m_storage = static_cast<rval_reference_type>(val); } #endif 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 ; } ; PK �p!\�ޫCs� s� & detail/old_optional_implementation.hppnu �[��� // Copyright (C) 2003, 2008 Fernando Luis Cacciola Carballal. // Copyright (C) 2014-2016 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 maintainer at: // akrzemi1@gmail.com #ifndef BOOST_OPTIONAL_DETAIL_OLD_OPTIONAL_IMPLEMENTATION_AJK_28JAN2015_HPP #define BOOST_OPTIONAL_DETAIL_OLD_OPTIONAL_IMPLEMENTATION_AJK_28JAN2015_HPP #include <boost/detail/reference_content.hpp> #include <boost/type_traits/is_reference.hpp> #include <boost/type_traits/integral_constant.hpp> #include <boost/type_traits/conditional.hpp> namespace boost { namespace optional_detail { template<class T> struct types_when_isnt_ref { typedef T const& reference_const_type ; typedef T & reference_type ; #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES typedef T && rval_reference_type ; typedef T && reference_type_of_temporary_wrapper; #ifdef BOOST_MOVE_OLD_RVALUE_REF_BINDING_RULES // GCC 4.4 has support for an early draft of rvalue references. The conforming version below // causes warnings about returning references to a temporary. static T&& move(T&& r) { return r; } #else static rval_reference_type move(reference_type r) { return boost::move(r); } #endif #endif typedef T const* pointer_const_type ; typedef T * pointer_type ; typedef T const& argument_type ; } ; template<class T> struct types_when_is_ref { typedef BOOST_DEDUCED_TYPENAME remove_reference<T>::type raw_type ; typedef raw_type& reference_const_type ; typedef raw_type& reference_type ; #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES typedef BOOST_DEDUCED_TYPENAME remove_const<raw_type>::type&& rval_reference_type ; typedef raw_type& reference_type_of_temporary_wrapper; static reference_type move(reference_type r) { return r; } #endif typedef raw_type* pointer_const_type ; typedef raw_type* pointer_type ; typedef raw_type& argument_type ; } ; template <class To, class From> void prevent_binding_rvalue_ref_to_optional_lvalue_ref() { #ifndef BOOST_OPTIONAL_CONFIG_ALLOW_BINDING_TO_RVALUES BOOST_STATIC_ASSERT_MSG( !boost::is_lvalue_reference<To>::value || !boost::is_rvalue_reference<From>::value, "binding rvalue references to optional lvalue references is disallowed"); #endif } struct optional_tag {} ; template<class T> class optional_base : public optional_tag { private : typedef #if !BOOST_WORKAROUND(BOOST_BORLANDC, BOOST_TESTED_AT(0x564)) BOOST_DEDUCED_TYPENAME #endif ::boost::detail::make_reference_content<T>::type internal_type ; typedef aligned_storage<internal_type> storage_type ; typedef types_when_isnt_ref<T> types_when_not_ref ; typedef types_when_is_ref<T> types_when_ref ; typedef optional_base<T> this_type ; protected : typedef T value_type ; typedef true_type is_reference_tag ; typedef false_type is_not_reference_tag ; typedef BOOST_DEDUCED_TYPENAME is_reference<T>::type is_reference_predicate ; public: typedef BOOST_DEDUCED_TYPENAME conditional<is_reference_predicate::value,types_when_ref,types_when_not_ref>::type types ; protected: typedef BOOST_DEDUCED_TYPENAME types::reference_type reference_type ; typedef BOOST_DEDUCED_TYPENAME types::reference_const_type reference_const_type ; #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES typedef BOOST_DEDUCED_TYPENAME types::rval_reference_type rval_reference_type ; typedef BOOST_DEDUCED_TYPENAME types::reference_type_of_temporary_wrapper reference_type_of_temporary_wrapper ; #endif typedef BOOST_DEDUCED_TYPENAME types::pointer_type pointer_type ; typedef BOOST_DEDUCED_TYPENAME types::pointer_const_type pointer_const_type ; typedef BOOST_DEDUCED_TYPENAME types::argument_type argument_type ; // Creates an optional<T> uninitialized. // No-throw optional_base() : m_initialized(false) {} // Creates an optional<T> uninitialized. // No-throw optional_base ( none_t ) : m_initialized(false) {} // Creates an optional<T> initialized with 'val'. // Can throw if T::T(T const&) does optional_base ( argument_type val ) : m_initialized(false) { construct(val); } #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // move-construct an optional<T> initialized from an rvalue-ref to 'val'. // Can throw if T::T(T&&) does optional_base ( rval_reference_type val ) : m_initialized(false) { construct( boost::move(val) ); } #endif // Creates an optional<T> initialized with 'val' IFF cond is true, otherwise creates an uninitialized optional<T>. // Can throw if T::T(T const&) does optional_base ( bool cond, argument_type val ) : m_initialized(false) { if ( cond ) construct(val); } // Creates a deep copy of another optional<T> // Can throw if T::T(T const&) does optional_base ( optional_base const& rhs ) : m_initialized(false) { if ( rhs.is_initialized() ) construct(rhs.get_impl()); } #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // Creates a deep move of another optional<T> // Can throw if T::T(T&&) does optional_base ( optional_base&& rhs ) : m_initialized(false) { if ( rhs.is_initialized() ) construct( boost::move(rhs.get_impl()) ); } #endif #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES template<class Expr, class PtrExpr> explicit optional_base ( Expr&& expr, PtrExpr const* tag ) : m_initialized(false) { construct(boost::forward<Expr>(expr),tag); } #else // This is used for both converting and in-place constructions. // Derived classes use the 'tag' to select the appropriate // implementation (the correct 'construct()' overload) template<class Expr> explicit optional_base ( Expr const& expr, Expr const* tag ) : m_initialized(false) { construct(expr,tag); } #endif // No-throw (assuming T::~T() doesn't) ~optional_base() { destroy() ; } // Assigns from another optional<T> (deep-copies the rhs value) void assign ( optional_base const& rhs ) { if (is_initialized()) { if ( rhs.is_initialized() ) assign_value(rhs.get_impl(), is_reference_predicate() ); else destroy(); } else { if ( rhs.is_initialized() ) construct(rhs.get_impl()); } } #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // Assigns from another optional<T> (deep-moves the rhs value) void assign ( optional_base&& rhs ) { if (is_initialized()) { if ( rhs.is_initialized() ) assign_value(boost::move(rhs.get_impl()), is_reference_predicate() ); else destroy(); } else { if ( rhs.is_initialized() ) construct(boost::move(rhs.get_impl())); } } #endif // Assigns from another _convertible_ optional<U> (deep-copies the rhs value) template<class U> void assign ( optional<U> const& rhs ) { if (is_initialized()) { if ( rhs.is_initialized() ) #ifndef BOOST_OPTIONAL_CONFIG_RESTORE_ASSIGNMENT_OF_NONCONVERTIBLE_TYPES assign_value(rhs.get(), is_reference_predicate() ); #else assign_value(static_cast<value_type>(rhs.get()), is_reference_predicate() ); #endif else destroy(); } else { if ( rhs.is_initialized() ) #ifndef BOOST_OPTIONAL_CONFIG_RESTORE_ASSIGNMENT_OF_NONCONVERTIBLE_TYPES construct(rhs.get()); #else construct(static_cast<value_type>(rhs.get())); #endif } } #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // 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 (is_initialized()) { if ( rhs.is_initialized() ) assign_value(static_cast<ref_type>(rhs.get()), is_reference_predicate() ); else destroy(); } else { if ( rhs.is_initialized() ) construct(static_cast<ref_type>(rhs.get())); } } #endif // Assigns from a T (deep-copies the rhs value) void assign ( argument_type val ) { if (is_initialized()) assign_value(val, is_reference_predicate() ); else construct(val); } #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // Assigns from a T (deep-moves the rhs value) void assign ( rval_reference_type val ) { if (is_initialized()) assign_value( boost::move(val), is_reference_predicate() ); else construct( boost::move(val) ); } #endif // Assigns from "none", destroying the current value, if any, leaving this UNINITIALIZED // No-throw (assuming T::~T() doesn't) void assign ( none_t ) BOOST_NOEXCEPT { destroy(); } #ifndef BOOST_OPTIONAL_NO_INPLACE_FACTORY_SUPPORT #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES template<class Expr, class ExprPtr> void assign_expr ( Expr&& expr, ExprPtr const* tag ) { if (is_initialized()) assign_expr_to_initialized(boost::forward<Expr>(expr),tag); else construct(boost::forward<Expr>(expr),tag); } #else template<class Expr> void assign_expr ( Expr const& expr, Expr const* tag ) { if (is_initialized()) assign_expr_to_initialized(expr,tag); else construct(expr,tag); } #endif #endif public : // Destroys the current value, if any, leaving this UNINITIALIZED // No-throw (assuming T::~T() doesn't) void reset() BOOST_NOEXCEPT { destroy(); } // **DEPPRECATED** Replaces the current value -if any- with 'val' void reset ( argument_type val ) { 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 ) { ::new (m_storage.address()) internal_type(val) ; m_initialized = true ; } #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES void construct ( rval_reference_type val ) { ::new (m_storage.address()) internal_type( types::move(val) ) ; m_initialized = true ; } #endif #if (!defined BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES) && (!defined BOOST_NO_CXX11_VARIADIC_TEMPLATES) // Constructs in-place // upon exception *this is always uninitialized template<class... Args> void emplace_assign ( Args&&... args ) { destroy(); ::new (m_storage.address()) internal_type( boost::forward<Args>(args)... ); m_initialized = true ; } #elif (!defined BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES) template<class Arg> void emplace_assign ( Arg&& arg ) { destroy(); ::new (m_storage.address()) internal_type( boost::forward<Arg>(arg) ); m_initialized = true ; } void emplace_assign () { destroy(); ::new (m_storage.address()) internal_type(); m_initialized = true ; } #else template<class Arg> void emplace_assign ( const Arg& arg ) { destroy(); ::new (m_storage.address()) internal_type( arg ); m_initialized = true ; } template<class Arg> void emplace_assign ( Arg& arg ) { destroy(); ::new (m_storage.address()) internal_type( arg ); m_initialized = true ; } void emplace_assign () { destroy(); ::new (m_storage.address()) internal_type(); m_initialized = true ; } #endif #ifndef BOOST_OPTIONAL_NO_INPLACE_FACTORY_SUPPORT #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // Constructs in-place using the given factory template<class Expr> void construct ( Expr&& factory, in_place_factory_base const* ) { BOOST_STATIC_ASSERT ( !is_reference_predicate::value ) ; boost_optional_detail::construct<value_type>(factory, m_storage.address()); m_initialized = true ; } // Constructs in-place using the given typed factory template<class Expr> void construct ( Expr&& factory, typed_in_place_factory_base const* ) { BOOST_STATIC_ASSERT ( !is_reference_predicate::value ) ; factory.apply(m_storage.address()) ; 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); } #else // Constructs in-place using the given factory template<class Expr> void construct ( Expr const& factory, in_place_factory_base const* ) { BOOST_STATIC_ASSERT ( !is_reference_predicate::value ) ; boost_optional_detail::construct<value_type>(factory, m_storage.address()); m_initialized = true ; } // Constructs in-place using the given typed factory template<class Expr> void construct ( Expr const& factory, typed_in_place_factory_base const* ) { BOOST_STATIC_ASSERT ( !is_reference_predicate::value ) ; factory.apply(m_storage.address()) ; m_initialized = true ; } template<class Expr> void assign_expr_to_initialized ( Expr const& 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 const& factory, typed_in_place_factory_base const* tag ) { destroy(); construct(factory,tag); } #endif #endif #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // 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* ) { new (m_storage.address()) internal_type(boost::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(boost::forward<Expr>(expr), is_reference_predicate()); } #else // 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 const& expr, void const* ) { new (m_storage.address()) internal_type(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 const& expr, void const* ) { assign_value(expr, is_reference_predicate()); } #endif #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 dosen't work becasue the comnpiler issues and error // instead of choosing the wrong overload // #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // Notice that 'Expr' will be optional<T> or optional<U> (but not 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. new (m_storage.address()) internal_type(types::move(expr.get())) ; m_initialized = true ; } } #else // Notice that 'Expr' will be optional<T> or optional<U> (but not optional_base<..>) template<class Expr> void construct ( Expr const& expr, optional_tag const* ) { if ( expr.is_initialized() ) { // An exception can be thrown here. // It it happens, THIS will be left uninitialized. new (m_storage.address()) internal_type(expr.get()) ; m_initialized = true ; } } #endif #endif // defined BOOST_OPTIONAL_WEAK_OVERLOAD_RESOLUTION void assign_value ( argument_type val, is_not_reference_tag ) { get_impl() = val; } void assign_value ( argument_type val, is_reference_tag ) { construct(val); } #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES void assign_value ( rval_reference_type val, is_not_reference_tag ) { get_impl() = static_cast<rval_reference_type>(val); } void assign_value ( rval_reference_type val, is_reference_tag ) { construct( static_cast<rval_reference_type>(val) ); } #endif void destroy() { if ( m_initialized ) destroy_impl(is_reference_predicate()) ; } reference_const_type get_impl() const { return dereference(get_object(), is_reference_predicate() ) ; } reference_type get_impl() { return dereference(get_object(), is_reference_predicate() ) ; } pointer_const_type get_ptr_impl() const { return cast_ptr(get_object(), is_reference_predicate() ) ; } pointer_type get_ptr_impl() { return cast_ptr(get_object(), is_reference_predicate() ) ; } private : // internal_type can be either T or reference_content<T> #if defined(BOOST_OPTIONAL_DETAIL_USE_ATTRIBUTE_MAY_ALIAS) // This workaround is supposed to silence GCC warnings about broken strict aliasing rules internal_type const* get_object() const { union { void const* ap_pvoid; internal_type const* as_ptype; } caster = { m_storage.address() }; return caster.as_ptype; } internal_type * get_object() { union { void* ap_pvoid; internal_type* as_ptype; } caster = { m_storage.address() }; return caster.as_ptype; } #else internal_type const* get_object() const { return static_cast<internal_type const*>(m_storage.address()); } internal_type * get_object() { return static_cast<internal_type *> (m_storage.address()); } #endif // reference_content<T> lacks an implicit conversion to T&, so the following is needed to obtain a proper reference. reference_const_type dereference( internal_type const* p, is_not_reference_tag ) const { return *p ; } reference_type dereference( internal_type* p, is_not_reference_tag ) { return *p ; } reference_const_type dereference( internal_type const* p, is_reference_tag ) const { return p->get() ; } reference_type dereference( internal_type* p, is_reference_tag ) { return p->get() ; } #if BOOST_WORKAROUND(BOOST_BORLANDC, BOOST_TESTED_AT(0x581)) void destroy_impl ( is_not_reference_tag ) { get_ptr_impl()->internal_type::~internal_type() ; m_initialized = false ; } #else void destroy_impl ( is_not_reference_tag ) { get_ptr_impl()->~T() ; m_initialized = false ; } #endif void destroy_impl ( is_reference_tag ) { m_initialized = false ; } // If T is of reference type, trying to get a pointer to the held value must result in a compile-time error. // Decent compilers should disallow conversions from reference_content<T>* to T*, but just in case, // the following olverloads are used to filter out the case and guarantee an error in case of T being a reference. pointer_const_type cast_ptr( internal_type const* p, is_not_reference_tag ) const { return p ; } pointer_type cast_ptr( internal_type * p, is_not_reference_tag ) { return p ; } pointer_const_type cast_ptr( internal_type const* p, is_reference_tag ) const { return &p->get() ; } pointer_type cast_ptr( internal_type * p, is_reference_tag ) { return &p->get() ; } bool m_initialized ; storage_type m_storage ; } ; } // namespace optional_detail template<class T> class optional : public optional_detail::optional_base<T> { typedef optional_detail::optional_base<T> base ; public : typedef optional<T> this_type ; typedef BOOST_DEDUCED_TYPENAME base::value_type value_type ; typedef BOOST_DEDUCED_TYPENAME base::reference_type reference_type ; typedef BOOST_DEDUCED_TYPENAME base::reference_const_type reference_const_type ; #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES typedef BOOST_DEDUCED_TYPENAME base::rval_reference_type rval_reference_type ; typedef BOOST_DEDUCED_TYPENAME base::reference_type_of_temporary_wrapper reference_type_of_temporary_wrapper ; #endif typedef BOOST_DEDUCED_TYPENAME base::pointer_type pointer_type ; typedef BOOST_DEDUCED_TYPENAME base::pointer_const_type pointer_const_type ; typedef BOOST_DEDUCED_TYPENAME base::argument_type argument_type ; // Creates an optional<T> uninitialized. // No-throw optional() BOOST_NOEXCEPT : base() {} // Creates an optional<T> uninitialized. // No-throw optional( none_t none_ ) BOOST_NOEXCEPT : base(none_) {} // Creates an optional<T> initialized with 'val'. // Can throw if T::T(T const&) does optional ( argument_type val ) : base(val) {} #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // Creates an optional<T> initialized with 'move(val)'. // Can throw if T::T(T &&) does optional ( rval_reference_type val ) : base( boost::forward<T>(val) ) {optional_detail::prevent_binding_rvalue_ref_to_optional_lvalue_ref<T, rval_reference_type>();} #endif // Creates an optional<T> initialized with 'val' IFF cond is true, otherwise creates an uninitialized optional. // Can throw if T::T(T const&) does optional ( bool cond, argument_type val ) : base(cond,val) {} // NOTE: MSVC needs templated versions first // Creates a deep copy of another convertible optional<U> // Requires a valid conversion from U to T. // Can throw if T::T(U const&) does template<class U> explicit optional ( optional<U> const& rhs ) : base() { if ( rhs.is_initialized() ) this->construct(rhs.get()); } #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // Creates a deep move of another convertible optional<U> // Requires a valid conversion from U to T. // Can throw if T::T(U&&) does template<class U> explicit optional ( optional<U> && rhs ) : base() { if ( rhs.is_initialized() ) this->construct( boost::move(rhs.get()) ); } #endif #ifndef BOOST_OPTIONAL_NO_INPLACE_FACTORY_SUPPORT // Creates an optional<T> with an expression which can be either // (a) An instance of InPlaceFactory (i.e. in_place(a,b,...,n); // (b) An instance of TypedInPlaceFactory ( i.e. in_place<T>(a,b,...,n); // (c) Any expression implicitly convertible to the single type // of a one-argument T's constructor. // (d*) Weak compilers (BCB) might also resolved Expr as optional<T> and optional<U> // even though explicit overloads are present for these. // Depending on the above some T ctor is called. // Can throw if the resolved T ctor throws. #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES template<class Expr> explicit optional ( Expr&& expr, BOOST_DEDUCED_TYPENAME boost::disable_if_c< (boost::is_base_of<optional_detail::optional_tag, BOOST_DEDUCED_TYPENAME boost::decay<Expr>::type>::value) || boost::is_same<BOOST_DEDUCED_TYPENAME boost::decay<Expr>::type, none_t>::value, bool >::type = true ) : base(boost::forward<Expr>(expr),boost::addressof(expr)) {optional_detail::prevent_binding_rvalue_ref_to_optional_lvalue_ref<T, Expr&&>();} #else template<class Expr> explicit optional ( Expr const& expr ) : base(expr,boost::addressof(expr)) {} #endif // !defined BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES #endif // !defined BOOST_OPTIONAL_NO_INPLACE_FACTORY_SUPPORT // Creates a deep copy of another optional<T> // Can throw if T::T(T const&) does optional ( optional const& rhs ) : base( static_cast<base const&>(rhs) ) {} #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // Creates a deep move of another optional<T> // Can throw if T::T(T&&) does optional ( optional && rhs ) BOOST_NOEXCEPT_IF(::boost::is_nothrow_move_constructible<T>::value) : base( boost::move(rhs) ) {} #endif // No-throw (assuming T::~T() doesn't) ~optional() {} #if !defined(BOOST_OPTIONAL_NO_INPLACE_FACTORY_SUPPORT) && !defined(BOOST_OPTIONAL_WEAK_OVERLOAD_RESOLUTION) // Assigns from an expression. See corresponding constructor. // Basic Guarantee: If the resolved T ctor throws, this is left UNINITIALIZED #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES template<class Expr> BOOST_DEDUCED_TYPENAME boost::disable_if_c< boost::is_base_of<optional_detail::optional_tag, BOOST_DEDUCED_TYPENAME boost::decay<Expr>::type>::value || boost::is_same<BOOST_DEDUCED_TYPENAME boost::decay<Expr>::type, none_t>::value, optional& >::type operator= ( Expr&& expr ) { optional_detail::prevent_binding_rvalue_ref_to_optional_lvalue_ref<T, Expr&&>(); this->assign_expr(boost::forward<Expr>(expr),boost::addressof(expr)); return *this ; } #else template<class Expr> optional& operator= ( Expr const& expr ) { this->assign_expr(expr,boost::addressof(expr)); return *this ; } #endif // !defined BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES #endif // !defined(BOOST_OPTIONAL_NO_INPLACE_FACTORY_SUPPORT) && !defined(BOOST_OPTIONAL_WEAK_OVERLOAD_RESOLUTION) // Copy-assigns from another convertible optional<U> (converts && deep-copies the rhs value) // Requires a valid conversion from U to T. // Basic Guarantee: If T::T( U const& ) throws, this is left UNINITIALIZED template<class U> optional& operator= ( optional<U> const& rhs ) { this->assign(rhs); return *this ; } #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // Move-assigns from another convertible optional<U> (converts && deep-moves the rhs value) // Requires a valid conversion from U to T. // Basic Guarantee: If T::T( U && ) throws, this is left UNINITIALIZED template<class U> optional& operator= ( optional<U> && rhs ) { this->assign(boost::move(rhs)); return *this ; } #endif // Assigns from another optional<T> (deep-copies the rhs value) // Basic Guarantee: If T::T( T const& ) throws, this is left UNINITIALIZED // (NOTE: On BCB, this operator is not actually called and left is left UNMODIFIED in case of a throw) optional& operator= ( optional const& rhs ) { this->assign( static_cast<base const&>(rhs) ) ; return *this ; } #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // Assigns from another optional<T> (deep-moves the rhs value) optional& operator= ( optional && rhs ) BOOST_NOEXCEPT_IF(::boost::is_nothrow_move_constructible<T>::value && ::boost::is_nothrow_move_assignable<T>::value) { this->assign( static_cast<base &&>(rhs) ) ; return *this ; } #endif // Assigns from a T (deep-copies the rhs value) // Basic Guarantee: If T::( T const& ) throws, this is left UNINITIALIZED optional& operator= ( argument_type val ) { this->assign( val ) ; return *this ; } #ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES // Assigns from a T (deep-moves the rhs value) optional& operator= ( rval_reference_type val ) { optional_detail::prevent_binding_rvalue_ref_to_optional_lvalue_ref<T, rval_reference_type>(); this->assign( boost::move(val) ) ; return *this ; } #endif // Assigns from a "none" // Which destroys the current value, if any, leaving this UNINITIALIZED // No-throw (assuming T::~T() doesn't) optional& operator= ( none_t none_ ) BOOST_NOEXCEPT { this->assign( none_ ) ; return *this ; } #if (!defined BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES) && (!defined BOOST_NO_CXX11_VARIADIC_TEMPLATES) // Constructs in-place // upon exception *this is always uninitialized template<class... Args> void emplace ( Args&&... args ) { this->emplace_assign( boost::forward<Args>(args)... ); } #elif (!defined BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES) template<class Arg> void emplace ( Arg&& arg ) { this->emplace_assign( boost::forward<Arg>(arg) ); } void emplace () { this->emplace_assign(); } #else template<class Arg> void emplace ( const Arg& arg ) { this->emplace_assign( arg ); } template<class Arg> void emplace ( Arg& arg ) { this->emplace_assign( arg ); } void emplace () { this->emplace_assign(); } #endif void swap( optional & arg ) BOOST_NOEXCEPT_IF(::boost::is_nothrow_move_constructible<T>::value && ::boost::is_nothrow_move_assignable<T>::value) { // allow for Koenig lookup boost::swap(*this, arg); } // Returns a reference to the value if this is initialized, otherwise, // the behaviour is UNDEFINED // No-throw reference_const_type get() const { BOOST_ASSERT(this->is_initialized()) ; return this->get_impl(); } reference_type get() { BOOST_ASSERT(this->is_initialized()) ; return this->get_impl(); } // Returns a copy of the value if this is initialized, 'v' otherwise reference_const_type get_value_or ( reference_const_type v ) const { return this->is_initialized() ? get() : v ; } reference_type get_value_or ( reference_type v ) { return this->is_initialized() ? get() : v ; } // Returns a pointer to the value if this is initialized, otherwise, // the behaviour is UNDEFINED // No-throw pointer_const_type operator->() const { BOOST_ASSERT(this->is_initialized()) ; return this->get_ptr_impl() ; } pointer_type operator->() { BOOST_ASSERT(this->is_initialized()) ; return this->get_ptr_impl() ; } // Returns a reference to the value if this is initialized, otherwise, // the behaviour is UNDEFINED // No-throw #if (!defined BOOST_NO_CXX11_REF_QUALIFIERS) && (!defined BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES) reference_const_type operator *() const& { return this->get() ; } reference_type operator *() & { return this->get() ; } reference_type_of_temporary_wrapper operator *() && { return base::types::move(this->get()) ; } #else reference_const_type operator *() const { return this->get() ; } reference_type operator *() { return this->get() ; } #endif // !defined BOOST_NO_CXX11_REF_QUALIFIERS #if (!defined BOOST_NO_CXX11_REF_QUALIFIERS) && (!defined BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES) reference_const_type value() const& { if (this->is_initialized()) return this->get() ; else throw_exception(bad_optional_access()); } reference_type value() & { if (this->is_initialized()) return this->get() ; else throw_exception(bad_optional_access()); } reference_type_of_temporary_wrapper value() && { if (this->is_initialized()) return base::types::move(this->get()) ; else throw_exception(bad_optional_access()); } #else reference_const_type value() const { if (this->is_initialized()) return this->get() ; else throw_exception(bad_optional_access()); } reference_type value() { if (this->is_initialized()) return this->get() ; else throw_exception(bad_optional_access()); } #endif #ifndef BOOST_NO_CXX11_REF_QUALIFIERS template <class U> value_type value_or ( U&& v ) const& { if (this->is_initialized()) return get(); else return boost::forward<U>(v); } template <class U> value_type value_or ( U&& v ) && { if (this->is_initialized()) return base::types::move(get()); else return boost::forward<U>(v); } #elif !defined BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES template <class U> value_type value_or ( U&& v ) const { if (this->is_initialized()) return get(); else return boost::forward<U>(v); } #else template <class U> value_type value_or ( U const& v ) const { if (this->is_initialized()) return get(); else return v; } template <class U> value_type value_or ( U& v ) const { if (this->is_initialized()) return get(); else return v; } #endif #ifndef BOOST_NO_CXX11_REF_QUALIFIERS template <typename F> value_type value_or_eval ( F f ) const& { if (this->is_initialized()) return get(); else return f(); } template <typename F> value_type value_or_eval ( F f ) && { if (this->is_initialized()) return base::types::move(get()); else return f(); } #else template <typename F> value_type value_or_eval ( F f ) const { if (this->is_initialized()) return get(); else return f(); } #endif bool operator!() const BOOST_NOEXCEPT { return !this->is_initialized() ; } BOOST_EXPLICIT_OPERATOR_BOOL_NOEXCEPT() } ; } // namespace boost #endif // header guard PK �p!\�ҽ�&( &( " detail/optional_reference_spec.hppnu �[��� // Copyright (C) 2015-2018 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 BOOST_STATIC_ASSERT_MSG(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) { BOOST_STATIC_ASSERT_MSG(boost::is_lvalue_reference<T>::value, "binding rvalue references to optional lvalue references is disallowed"); return boost::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 refernces: we need to disable the asignment from // const integral lvalue reference, as it may be an invalid temporary BOOST_STATIC_ASSERT_MSG(!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 srewed 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 { return ptr_ ? *ptr_ : (throw_exception(bad_optional_access()), *ptr_); } bool operator!() const BOOST_NOEXCEPT { return ptr_ == 0; } BOOST_EXPLICIT_OPERATOR_BOOL_NOEXCEPT() 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 boost::result_of<F(T&)>::type> map(F f) const { if (this->has_value()) return f(this->get()); else return none; } template <typename F> optional<typename optional_detail::optional_value_type<typename boost::result_of<F(T&)>::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 PK �p!\Q� � � bad_optional_access.hppnu �[��� // 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 PK �p!\ݕ � � optional_fwd.hppnu �[��� PK �p!\��A�� � � optional.hppnu �[��� PK �p!\t�|_� � � optional_io.hppnu �[��� PK �p!\��;� � # � detail/optional_factory_support.hppnu �[��� PK �p!\��Nx x # � detail/optional_aligned_storage.hppnu �[��� PK �p!\�;�� � �� detail/optional_relops.hppnu �[��� PK �p!\q�~� � � detail/optional_config.hppnu �[��� PK �p!\J9n@� � U� detail/experimental_traits.hppnu �[��� PK �p!\�u�0� � r detail/optional_swap.hppnu �[��� PK �p!\��TG�8 �8 + � detail/optional_trivially_copyable_base.hppnu �[��� PK �p!\�ޫCs� s� & `R detail/old_optional_implementation.hppnu �[��� PK �p!\�ҽ�&( &( " )� detail/optional_reference_spec.hppnu �[��� PK �p!\Q� � � � bad_optional_access.hppnu �[��� PK � �
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