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Diffstat (limited to '3rdParty/Boost/boost/optional/optional.hpp')
| m--------- | 3rdParty/Boost | 0 | ||||
| -rw-r--r-- | 3rdParty/Boost/boost/optional/optional.hpp | 922 | 
2 files changed, 0 insertions, 922 deletions
| diff --git a/3rdParty/Boost b/3rdParty/Boost new file mode 160000 +Subproject 3bbdbc8cf1996f23d9a366da8bac0f97be6ad79 diff --git a/3rdParty/Boost/boost/optional/optional.hpp b/3rdParty/Boost/boost/optional/optional.hpp deleted file mode 100644 index 42277ba..0000000 --- a/3rdParty/Boost/boost/optional/optional.hpp +++ /dev/null @@ -1,922 +0,0 @@ -// Copyright (C) 2003, 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/lib/optional for documentation. -// -// You are welcome to contact the author at: -//  fernando_cacciola@hotmail.com -// -#ifndef BOOST_OPTIONAL_OPTIONAL_FLC_19NOV2002_HPP -#define BOOST_OPTIONAL_OPTIONAL_FLC_19NOV2002_HPP - -#include<new> -#include<algorithm> - -#include "boost/config.hpp" -#include "boost/assert.hpp" -#include "boost/type.hpp" -#include "boost/type_traits/alignment_of.hpp" -#include "boost/type_traits/type_with_alignment.hpp" -#include "boost/type_traits/remove_reference.hpp" -#include "boost/type_traits/is_reference.hpp" -#include "boost/mpl/if.hpp" -#include "boost/mpl/bool.hpp" -#include "boost/mpl/not.hpp" -#include "boost/detail/reference_content.hpp" -#include "boost/none.hpp" -#include "boost/utility/compare_pointees.hpp" - -#include "boost/optional/optional_fwd.hpp" - -#if BOOST_WORKAROUND(BOOST_MSVC, == 1200) -// VC6.0 has the following bug: -//   When a templated assignment operator exist, an implicit conversion -//   constructing an optional<T> is used when assigment of the form: -//     optional<T> opt ; opt = T(...); -//   is compiled. -//   However, optional's ctor is _explicit_ and the assignemt shouldn't compile. -//   Therefore, for VC6.0 templated assignment is disabled. -// -#define BOOST_OPTIONAL_NO_CONVERTING_ASSIGNMENT -#endif - -#if BOOST_WORKAROUND(BOOST_MSVC, == 1300) -// VC7.0 has the following bug: -//   When both a non-template and a template copy-ctor exist -//   and the templated version is made 'explicit', the explicit is also -//   given to the non-templated version, making the class non-implicitely-copyable. -// -#define BOOST_OPTIONAL_NO_CONVERTING_COPY_CTOR -#endif - -#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) || BOOST_WORKAROUND(BOOST_INTEL_CXX_VERSION,<=700) -// AFAICT only VC7.1 correctly resolves the overload set -// that includes the in-place factory taking functions, -// so for the other VC versions, in-place factory support -// is disabled -#define BOOST_OPTIONAL_NO_INPLACE_FACTORY_SUPPORT -#endif - -#if BOOST_WORKAROUND(__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) \ -    && BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x581) ) -// 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 incrorrectly sink to this general catch-all member function template as shown above. -#define BOOST_OPTIONAL_WEAK_OVERLOAD_RESOLUTION -#endif - -// 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> -  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 ; - -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! -    union dummy_u -    { -        char data[ sizeof(T) ]; -        BOOST_DEDUCED_TYPENAME type_with_alignment< -          ::boost::alignment_of<T>::value >::type aligner_; -    } dummy_ ; - -  public: - -    void const* address() const { return &dummy_.data[0]; } -    void      * address()       { return &dummy_.data[0]; } -} ; - -template<class T> -struct types_when_isnt_ref -{ -  typedef T const& reference_const_type ; -  typedef T &      reference_type ; -  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 ; -  typedef raw_type* pointer_const_type ; -  typedef raw_type* pointer_type ; -  typedef raw_type& argument_type ; -} ; - -struct optional_tag {} ; - -template<class T> -class optional_base : public optional_tag -{ -  private : - -    typedef -#if !BOOST_WORKAROUND(__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 mpl::true_  is_reference_tag ; -    typedef mpl::false_ is_not_reference_tag ; - -    typedef BOOST_DEDUCED_TYPENAME is_reference<T>::type is_reference_predicate ; - -    typedef BOOST_DEDUCED_TYPENAME mpl::if_<is_reference_predicate,types_when_ref,types_when_not_ref>::type types ; - -    typedef bool (this_type::*unspecified_bool_type)() const; - -    typedef BOOST_DEDUCED_TYPENAME types::reference_type       reference_type ; -    typedef BOOST_DEDUCED_TYPENAME types::reference_const_type reference_const_type ; -    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); -    } -     -    // Creates an optional<T> initialized with 'val' IFF cond is true, otherwise creates an uninitialzed 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()); -    } - - -    // 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); -    } - - - -    // 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()); -      } -    } - -    // 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() ) -             assign_value(static_cast<value_type>(rhs.get()), is_reference_predicate() ); -        else destroy(); -      } -      else -      { -        if ( rhs.is_initialized() ) -          construct(static_cast<value_type>(rhs.get())); -      } -    } - -    // 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); -    } - -    // Assigns from "none", destroying the current value, if any, leaving this UNINITIALIZED -    // No-throw (assuming T::~T() doesn't) -    void assign ( none_t ) { destroy(); } - -#ifndef BOOST_OPTIONAL_NO_INPLACE_FACTORY_SUPPORT -    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 - -  public : - -    // Destroys the current value, if any, leaving this UNINITIALIZED -    // No-throw (assuming T::~T() doesn't) -    void reset() { destroy(); } - -    // 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_NO_INPLACE_FACTORY_SUPPORT -    // Constructs in-place using the given factory -    template<class Expr> -    void construct ( Expr const& factory, in_place_factory_base const* ) -     { -       BOOST_STATIC_ASSERT ( ::boost::mpl::not_<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 ( ::boost::mpl::not_<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 - -    // Constructs using any expression implicitely 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 implicitely 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()); -     } - -#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 -    // -    // 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 - -    void assign_value ( argument_type val, is_not_reference_tag ) { get_impl() = val; } -    void assign_value ( argument_type val, is_reference_tag     ) { construct(val); } - -    void destroy() -    { -      if ( m_initialized ) -        destroy_impl(is_reference_predicate()) ; -    } - -    unspecified_bool_type safe_bool() const { return m_initialized ? &this_type::is_initialized : 0 ; } - -    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> -    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()); } - -    // 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(__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::~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 ; - -    typedef BOOST_DEDUCED_TYPENAME base::unspecified_bool_type  unspecified_bool_type ; - -  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 ; -    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() : base() {} - -    // Creates an optional<T> uninitialized. -    // No-throw -    optional( none_t none_ ) : base(none_) {} - -    // Creates an optional<T> initialized with 'val'. -    // Can throw if T::T(T const&) does -    optional ( argument_type val ) : base(val) {} - -    // 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_NO_CONVERTING_COPY_CTOR -    // 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()); -    } -#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 implicitely 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 is the resolved T ctor throws. -    template<class Expr> -    explicit optional ( Expr const& expr ) : base(expr,&expr) {} -#endif - -    // Creates a deep copy of another optional<T> -    // Can throw if T::T(T const&) does -    optional ( optional const& rhs ) : base(rhs) {} - -   // 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 -    template<class Expr> -    optional& operator= ( Expr expr ) -      { -        this->assign_expr(expr,&expr); -        return *this ; -      } -#endif - - -#ifndef BOOST_OPTIONAL_NO_CONVERTING_ASSIGNMENT -    // 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 ; -      } -#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( rhs ) ; -        return *this ; -      } - -    // 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 ; -      } - -    // 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_ ) -      { -        this->assign( none_ ) ; -        return *this ; -      } - -    // 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 -    reference_const_type operator *() const { return this->get() ; } -    reference_type       operator *()       { return this->get() ; } - -    // implicit conversion to "bool" -    // No-throw -    operator unspecified_bool_type() const { return this->safe_bool() ; } - -       // This is provided for those compilers which don't like the conversion to bool -       // on some contexts. -       bool operator!() const { return !this->is_initialized() ; } -} ; - -// 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); -} - -// 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() ; -} - -// 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 equal_pointees(x,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 ) -{ return equal_pointees(x, optional<T>() ); } - -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 y ) -{ return !( x == y ) ; } - -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 x, optional<T> const& y ) -{ return equal_pointees(optional<T>() ,y); } - -template<class T> -inline -bool operator < ( none_t x, optional<T> const& y ) -{ return less_pointees(optional<T>() ,y); } - -template<class T> -inline -bool operator != ( none_t x, optional<T> const& y ) -{ return !( x == 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 ) ; } - -// -// The following swap implementation follows the GCC workaround as found in -//  "boost/detail/compressed_pair.hpp" -// -namespace optional_detail { - -// GCC < 3.2 gets the using declaration at namespace scope (FLC, DWA) -#if BOOST_WORKAROUND(__GNUC__, < 3)                             \ -    || BOOST_WORKAROUND(__GNUC__, == 3) && __GNUC_MINOR__ <= 2 -   using std::swap; -#define BOOST_OPTIONAL_STD_SWAP_INTRODUCED_AT_NS_SCOPE -#endif - -// optional's swap: -// If both are initialized, calls swap(T&, T&). If this swap throws, both will remain initialized but their values are now unspecified. -// If only one is initialized, calls U.reset(*I), THEN I.reset(). -// If U.reset(*I) throws, both are left UNCHANGED (U is kept uinitialized and I is never reset) -// If both are uninitialized, do nothing (no-throw) -template<class T> -inline -void optional_swap ( optional<T>& x, optional<T>& y ) -{ -  if ( !x && !!y ) -  { -    x.reset(*y); -    y.reset(); -  } -  else if ( !!x && !y ) -  { -    y.reset(*x); -    x.reset(); -  } -  else if ( !!x && !!y ) -  { -// GCC > 3.2 and all other compilers have the using declaration at function scope (FLC) -#ifndef BOOST_OPTIONAL_STD_SWAP_INTRODUCED_AT_NS_SCOPE -    // allow for Koenig lookup -    using std::swap ; -#endif -    swap(*x,*y); -  } -} - -} // namespace optional_detail - -template<class T> inline void swap ( optional<T>& x, optional<T>& y ) -{ -  optional_detail::optional_swap(x,y); -} - - -} // namespace boost - -#endif - | 
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