early-access version 3088

This commit is contained in:
pineappleEA
2022-11-05 15:35:56 +01:00
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commit b601909c6d
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// (C) Copyright Andrey Semashev 2017.
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_FUNCTION_OUTPUT_ITERATOR_HPP
#define BOOST_FUNCTION_OUTPUT_ITERATOR_HPP
// This is a deprecated header left for backward compatibility.
// Use boost/iterator/function_output_iterator.hpp instead.
#include <boost/config/header_deprecated.hpp>
BOOST_HEADER_DEPRECATED("<boost/iterator/function_output_iterator.hpp>")
#include <boost/iterator/function_output_iterator.hpp>
#endif // BOOST_FUNCTION_OUTPUT_ITERATOR_HPP

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// (C) Copyright Jens Maurer 2001.
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
// Revision History:
// 15 Nov 2001 Jens Maurer
// created.
// See http://www.boost.org/libs/utility/iterator_adaptors.htm for documentation.
#ifndef BOOST_ITERATOR_ADAPTOR_GENERATOR_ITERATOR_HPP
#define BOOST_ITERATOR_ADAPTOR_GENERATOR_ITERATOR_HPP
#include <boost/iterator/iterator_facade.hpp>
#include <boost/ref.hpp>
namespace boost {
namespace iterators {
template<class Generator>
class generator_iterator
: public iterator_facade<
generator_iterator<Generator>
, typename Generator::result_type
, single_pass_traversal_tag
, typename Generator::result_type const&
>
{
typedef iterator_facade<
generator_iterator<Generator>
, typename Generator::result_type
, single_pass_traversal_tag
, typename Generator::result_type const&
> super_t;
public:
generator_iterator() {}
generator_iterator(Generator* g) : m_g(g), m_value((*m_g)()) {}
void increment()
{
m_value = (*m_g)();
}
const typename Generator::result_type&
dereference() const
{
return m_value;
}
bool equal(generator_iterator const& y) const
{
return this->m_g == y.m_g && this->m_value == y.m_value;
}
private:
Generator* m_g;
typename Generator::result_type m_value;
};
template<class Generator>
struct generator_iterator_generator
{
typedef generator_iterator<Generator> type;
};
template <class Generator>
inline generator_iterator<Generator>
make_generator_iterator(Generator & gen)
{
typedef generator_iterator<Generator> result_t;
return result_t(&gen);
}
} // namespace iterators
using iterators::generator_iterator;
using iterators::generator_iterator_generator;
using iterators::make_generator_iterator;
} // namespace boost
#endif // BOOST_ITERATOR_ADAPTOR_GENERATOR_ITERATOR_HPP

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#ifndef INDIRECT_REFERENCE_DWA200415_HPP
# define INDIRECT_REFERENCE_DWA200415_HPP
//
// Copyright David Abrahams 2004. 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)
//
// typename indirect_reference<P>::type provides the type of *p.
//
// http://www.boost.org/libs/iterator/doc/pointee.html
//
# include <boost/detail/is_incrementable.hpp>
# include <boost/iterator/iterator_traits.hpp>
# include <boost/type_traits/remove_cv.hpp>
# include <boost/mpl/eval_if.hpp>
# include <boost/pointee.hpp>
namespace boost {
namespace detail
{
template <class P>
struct smart_ptr_reference
{
typedef typename boost::pointee<P>::type& type;
};
}
template <class P>
struct indirect_reference
: mpl::eval_if<
detail::is_incrementable<P>
, iterator_reference<P>
, detail::smart_ptr_reference<P>
>
{
};
} // namespace boost
#endif // INDIRECT_REFERENCE_DWA200415_HPP

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// Copyright (C) 2017 Michel Morin.
//
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_ITERATOR_ADVANCE_HPP
#define BOOST_ITERATOR_ADVANCE_HPP
#include <boost/config.hpp>
#include <boost/detail/workaround.hpp>
#include <boost/iterator/iterator_categories.hpp>
namespace boost {
namespace iterators {
namespace detail {
template <typename InputIterator, typename Distance>
inline BOOST_CXX14_CONSTEXPR void
advance_impl(
InputIterator& it
, Distance n
, incrementable_traversal_tag
)
{
while (n > 0) {
++it;
--n;
}
}
#if BOOST_WORKAROUND(BOOST_GCC_VERSION, >= 40600)
// type-limits warning issued below when n is an unsigned integral
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wtype-limits"
#endif
template <typename BidirectionalIterator, typename Distance>
inline BOOST_CXX14_CONSTEXPR void
advance_impl(
BidirectionalIterator& it
, Distance n
, bidirectional_traversal_tag
)
{
if (n >= 0) {
while (n > 0) {
++it;
--n;
}
}
else {
while (n < 0) {
--it;
++n;
}
}
}
#if BOOST_WORKAROUND(BOOST_GCC_VERSION, >= 40600)
#pragma GCC diagnostic pop
#endif
template <typename RandomAccessIterator, typename Distance>
inline BOOST_CXX14_CONSTEXPR void
advance_impl(
RandomAccessIterator& it
, Distance n
, random_access_traversal_tag
)
{
it += n;
}
}
namespace advance_adl_barrier {
template <typename InputIterator, typename Distance>
inline BOOST_CXX14_CONSTEXPR void
advance(InputIterator& it, Distance n)
{
detail::advance_impl(
it, n, typename iterator_traversal<InputIterator>::type()
);
}
}
using namespace advance_adl_barrier;
} // namespace iterators
using namespace iterators::advance_adl_barrier;
} // namespace boost
#endif

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// Copyright David Abrahams 2003.
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef COUNTING_ITERATOR_DWA200348_HPP
# define COUNTING_ITERATOR_DWA200348_HPP
# include <boost/config.hpp>
# include <boost/static_assert.hpp>
# ifndef BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS
# include <limits>
# elif !BOOST_WORKAROUND(BOOST_BORLANDC, BOOST_TESTED_AT(0x551))
# include <boost/type_traits/is_convertible.hpp>
# else
# include <boost/type_traits/is_arithmetic.hpp>
# endif
# include <boost/type_traits/is_integral.hpp>
# include <boost/type_traits/type_identity.hpp>
# include <boost/type_traits/conditional.hpp>
# include <boost/type_traits/integral_constant.hpp>
# include <boost/detail/numeric_traits.hpp>
# include <boost/iterator/iterator_adaptor.hpp>
namespace boost {
namespace iterators {
template <
class Incrementable
, class CategoryOrTraversal
, class Difference
>
class counting_iterator;
namespace detail
{
// Try to detect numeric types at compile time in ways compatible
// with the limitations of the compiler and library.
template <class T>
struct is_numeric_impl
{
// For a while, this wasn't true, but we rely on it below. This is a regression assert.
BOOST_STATIC_ASSERT(::boost::is_integral<char>::value);
# ifndef BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS
BOOST_STATIC_CONSTANT(bool, value = std::numeric_limits<T>::is_specialized);
# else
# if !BOOST_WORKAROUND(BOOST_BORLANDC, BOOST_TESTED_AT(0x551))
BOOST_STATIC_CONSTANT(
bool, value = (
boost::is_convertible<int,T>::value
&& boost::is_convertible<T,int>::value
));
# else
BOOST_STATIC_CONSTANT(bool, value = ::boost::is_arithmetic<T>::value);
# endif
# endif
};
template <class T>
struct is_numeric
: boost::integral_constant<bool, ::boost::iterators::detail::is_numeric_impl<T>::value>
{};
# if defined(BOOST_HAS_LONG_LONG)
template <>
struct is_numeric<boost::long_long_type>
: boost::true_type {};
template <>
struct is_numeric<boost::ulong_long_type>
: boost::true_type {};
# endif
# if defined(BOOST_HAS_INT128)
template <>
struct is_numeric<boost::int128_type>
: boost::true_type {};
template <>
struct is_numeric<boost::uint128_type>
: boost::true_type {};
# endif
// Some compilers fail to have a numeric_limits specialization
template <>
struct is_numeric<wchar_t>
: true_type {};
template <class T>
struct numeric_difference
{
typedef typename boost::detail::numeric_traits<T>::difference_type type;
};
# if defined(BOOST_HAS_INT128)
// std::numeric_limits, which is used by numeric_traits, is not specialized for __int128 in some standard libraries
template <>
struct numeric_difference<boost::int128_type>
{
typedef boost::int128_type type;
};
template <>
struct numeric_difference<boost::uint128_type>
{
typedef boost::int128_type type;
};
# endif
template <class Incrementable, class CategoryOrTraversal, class Difference>
struct counting_iterator_base
{
typedef typename detail::ia_dflt_help<
CategoryOrTraversal
, typename boost::conditional<
is_numeric<Incrementable>::value
, boost::type_identity<random_access_traversal_tag>
, iterator_traversal<Incrementable>
>::type
>::type traversal;
typedef typename detail::ia_dflt_help<
Difference
, typename boost::conditional<
is_numeric<Incrementable>::value
, numeric_difference<Incrementable>
, iterator_difference<Incrementable>
>::type
>::type difference;
typedef iterator_adaptor<
counting_iterator<Incrementable, CategoryOrTraversal, Difference> // self
, Incrementable // Base
, Incrementable // Value
# ifndef BOOST_ITERATOR_REF_CONSTNESS_KILLS_WRITABILITY
const // MSVC won't strip this. Instead we enable Thomas'
// criterion (see boost/iterator/detail/facade_iterator_category.hpp)
# endif
, traversal
, Incrementable const& // reference
, difference
> type;
};
// Template class distance_policy_select -- choose a policy for computing the
// distance between counting_iterators at compile-time based on whether or not
// the iterator wraps an integer or an iterator, using "poor man's partial
// specialization".
template <bool is_integer> struct distance_policy_select;
// A policy for wrapped iterators
template <class Difference, class Incrementable1, class Incrementable2>
struct iterator_distance
{
static Difference distance(Incrementable1 x, Incrementable2 y)
{
return y - x;
}
};
// A policy for wrapped numbers
template <class Difference, class Incrementable1, class Incrementable2>
struct number_distance
{
static Difference distance(Incrementable1 x, Incrementable2 y)
{
return boost::detail::numeric_distance(x, y);
}
};
}
template <
class Incrementable
, class CategoryOrTraversal = use_default
, class Difference = use_default
>
class counting_iterator
: public detail::counting_iterator_base<
Incrementable, CategoryOrTraversal, Difference
>::type
{
typedef typename detail::counting_iterator_base<
Incrementable, CategoryOrTraversal, Difference
>::type super_t;
friend class iterator_core_access;
public:
typedef typename super_t::difference_type difference_type;
BOOST_DEFAULTED_FUNCTION(counting_iterator(), {})
BOOST_DEFAULTED_FUNCTION(counting_iterator(counting_iterator const& rhs), : super_t(rhs.base()) {})
counting_iterator(Incrementable x)
: super_t(x)
{
}
# if 0
template<class OtherIncrementable>
counting_iterator(
counting_iterator<OtherIncrementable, CategoryOrTraversal, Difference> const& t
, typename enable_if_convertible<OtherIncrementable, Incrementable>::type* = 0
)
: super_t(t.base())
{}
# endif
BOOST_DEFAULTED_FUNCTION(counting_iterator& operator=(counting_iterator const& rhs), { *static_cast< super_t* >(this) = static_cast< super_t const& >(rhs); return *this; })
private:
typename super_t::reference dereference() const
{
return this->base_reference();
}
template <class OtherIncrementable>
difference_type
distance_to(counting_iterator<OtherIncrementable, CategoryOrTraversal, Difference> const& y) const
{
typedef typename boost::conditional<
detail::is_numeric<Incrementable>::value
, detail::number_distance<difference_type, Incrementable, OtherIncrementable>
, detail::iterator_distance<difference_type, Incrementable, OtherIncrementable>
>::type d;
return d::distance(this->base(), y.base());
}
};
// Manufacture a counting iterator for an arbitrary incrementable type
template <class Incrementable>
inline counting_iterator<Incrementable>
make_counting_iterator(Incrementable x)
{
typedef counting_iterator<Incrementable> result_t;
return result_t(x);
}
} // namespace iterators
using iterators::counting_iterator;
using iterators::make_counting_iterator;
} // namespace boost
#endif // COUNTING_ITERATOR_DWA200348_HPP

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// Copyright David Abrahams 2003. 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)
#ifndef ANY_CONVERSION_EATER_DWA20031117_HPP
# define ANY_CONVERSION_EATER_DWA20031117_HPP
namespace boost {
namespace iterators {
namespace detail {
// This type can be used in traits to "eat" up the one user-defined
// implicit conversion allowed.
struct any_conversion_eater
{
template <class T>
any_conversion_eater(T const&);
};
}}} // namespace boost::iterators::detail
#endif // ANY_CONVERSION_EATER_DWA20031117_HPP

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// (C) Copyright David Abrahams 2002.
// (C) Copyright Jeremy Siek 2002.
// (C) Copyright Thomas Witt 2002.
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
// no include guard multiple inclusion intended
//
// This is a temporary workaround until the bulk of this is
// available in boost config.
// 23/02/03 thw
//
#include <boost/config.hpp> // for prior
#include <boost/detail/workaround.hpp>
#ifdef BOOST_ITERATOR_CONFIG_DEF
# error you have nested config_def #inclusion.
#else
# define BOOST_ITERATOR_CONFIG_DEF
#endif
// We enable this always now. Otherwise, the simple case in
// libs/iterator/test/constant_iterator_arrow.cpp fails to compile
// because the operator-> return is improperly deduced as a non-const
// pointer.
#if 1 || defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) \
|| BOOST_WORKAROUND(BOOST_BORLANDC, BOOST_TESTED_AT(0x531))
// Recall that in general, compilers without partial specialization
// can't strip constness. Consider counting_iterator, which normally
// passes a const Value to iterator_facade. As a result, any code
// which makes a std::vector of the iterator's value_type will fail
// when its allocator declares functions overloaded on reference and
// const_reference (the same type).
//
// Furthermore, Borland 5.5.1 drops constness in enough ways that we
// end up using a proxy for operator[] when we otherwise shouldn't.
// Using reference constness gives it an extra hint that it can
// return the value_type from operator[] directly, but is not
// strictly necessary. Not sure how best to resolve this one.
# define BOOST_ITERATOR_REF_CONSTNESS_KILLS_WRITABILITY 1
#endif
#if BOOST_WORKAROUND(BOOST_BORLANDC, BOOST_TESTED_AT(0x5A0)) \
|| (BOOST_WORKAROUND(BOOST_INTEL_CXX_VERSION, <= 700) && defined(_MSC_VER)) \
|| BOOST_WORKAROUND(__DECCXX_VER, BOOST_TESTED_AT(60590042)) \
|| BOOST_WORKAROUND(__SUNPRO_CC, BOOST_TESTED_AT(0x590))
# define BOOST_NO_LVALUE_RETURN_DETECTION
# if 0 // test code
struct v {};
typedef char (&no)[3];
template <class T>
no foo(T const&, ...);
template <class T>
char foo(T&, int);
struct value_iterator
{
v operator*() const;
};
template <class T>
struct lvalue_deref_helper
{
static T& x;
enum { value = (sizeof(foo(*x,0)) == 1) };
};
int z2[(lvalue_deref_helper<v*>::value == 1) ? 1 : -1];
int z[(lvalue_deref_helper<value_iterator>::value) == 1 ? -1 : 1 ];
# endif
#endif
#if BOOST_WORKAROUND(__MWERKS__, <=0x2407)
# define BOOST_NO_IS_CONVERTIBLE // "is_convertible doesn't work for simple types"
#endif
#if BOOST_WORKAROUND(__GNUC__, == 3) && BOOST_WORKAROUND(__GNUC_MINOR__, < 4) && !defined(__EDG_VERSION__) \
|| BOOST_WORKAROUND(BOOST_BORLANDC, BOOST_TESTED_AT(0x551))
# define BOOST_NO_IS_CONVERTIBLE_TEMPLATE // The following program fails to compile:
# if 0 // test code
#include <boost/type_traits/is_convertible.hpp>
template <class T>
struct foo
{
foo(T);
template <class U>
foo(foo<U> const& other) : p(other.p) { }
T p;
};
bool x = boost::is_convertible<foo<int const*>, foo<int*> >::value;
# endif
#endif
#if !defined(BOOST_MSVC) && (defined(BOOST_NO_SFINAE) || defined(BOOST_NO_IS_CONVERTIBLE) || defined(BOOST_NO_IS_CONVERTIBLE_TEMPLATE))
# define BOOST_NO_STRICT_ITERATOR_INTEROPERABILITY
#endif
# if BOOST_WORKAROUND(BOOST_BORLANDC, BOOST_TESTED_AT(0x564))
// GCC-2.95 (obsolete) eagerly instantiates templated constructors and conversion
// operators in convertibility checks, causing premature errors.
//
// Borland's problems are harder to diagnose due to lack of an
// instantiation stack backtrace. They may be due in part to the fact
// that it drops cv-qualification willy-nilly in templates.
# define BOOST_NO_ONE_WAY_ITERATOR_INTEROP
# endif
// no include guard; multiple inclusion intended

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// (C) Copyright Thomas Witt 2002.
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
// no include guard multiple inclusion intended
//
// This is a temporary workaround until the bulk of this is
// available in boost config.
// 23/02/03 thw
//
#undef BOOST_NO_IS_CONVERTIBLE
#undef BOOST_NO_IS_CONVERTIBLE_TEMPLATE
#undef BOOST_NO_STRICT_ITERATOR_INTEROPERABILITY
#undef BOOST_NO_LVALUE_RETURN_DETECTION
#undef BOOST_NO_ONE_WAY_ITERATOR_INTEROP
#ifdef BOOST_ITERATOR_CONFIG_DEF
# undef BOOST_ITERATOR_CONFIG_DEF
#else
# error missing or nested #include config_def
#endif

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// (C) Copyright David Abrahams 2002.
// (C) Copyright Jeremy Siek 2002.
// (C) Copyright Thomas Witt 2002.
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_ENABLE_IF_23022003THW_HPP
#define BOOST_ENABLE_IF_23022003THW_HPP
#include <boost/config.hpp>
#include <boost/iterator/detail/config_def.hpp>
#if defined(BOOST_NO_SFINAE) || defined(BOOST_NO_IS_CONVERTIBLE)
#include <boost/type_traits/type_identity.hpp>
#endif
//
// Boost iterators uses its own enable_if cause we need
// special semantics for deficient compilers.
// 23/02/03 thw
//
namespace boost
{
namespace iterators
{
//
// Base machinery for all kinds of enable if
//
template<bool>
struct enabled
{
template<typename T>
struct base
{
typedef T type;
};
};
//
// For compilers that don't support "Substitution Failure Is Not An Error"
// enable_if falls back to always enabled. See comments
// on operator implementation for consequences.
//
template<>
struct enabled<false>
{
template<typename T>
struct base
{
#ifdef BOOST_NO_SFINAE
typedef T type;
// This way to do it would give a nice error message containing
// invalid overload, but has the big disadvantage that
// there is no reference to user code in the error message.
//
// struct invalid_overload;
// typedef invalid_overload type;
//
#endif
};
};
template <class Cond,
class Return>
struct enable_if
# if !defined(BOOST_NO_SFINAE) && !defined(BOOST_NO_IS_CONVERTIBLE)
: enabled<(Cond::value)>::template base<Return>
# else
: boost::type_identity<Return>
# endif
{
};
} // namespace iterators
} // namespace boost
#include <boost/iterator/detail/config_undef.hpp>
#endif // BOOST_ENABLE_IF_23022003THW_HPP

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// Copyright David Abrahams 2003. 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)
#ifndef FACADE_ITERATOR_CATEGORY_DWA20031118_HPP
# define FACADE_ITERATOR_CATEGORY_DWA20031118_HPP
# include <boost/core/use_default.hpp>
# include <boost/iterator/iterator_categories.hpp>
# include <boost/mpl/or.hpp> // used in iterator_tag inheritance logic
# include <boost/mpl/and.hpp>
# include <boost/mpl/if.hpp>
# include <boost/mpl/eval_if.hpp>
# include <boost/mpl/identity.hpp>
# include <boost/mpl/assert.hpp>
# include <boost/type_traits/is_same.hpp>
# include <boost/type_traits/is_const.hpp>
# include <boost/type_traits/is_reference.hpp>
# include <boost/type_traits/is_convertible.hpp>
# include <boost/type_traits/is_same.hpp>
# include <boost/iterator/detail/config_def.hpp> // try to keep this last
# ifdef BOOST_ITERATOR_REF_CONSTNESS_KILLS_WRITABILITY
# include <boost/detail/indirect_traits.hpp>
# endif
//
// iterator_category deduction for iterator_facade
//
namespace boost {
namespace iterators {
using boost::use_default;
namespace detail {
struct input_output_iterator_tag
: std::input_iterator_tag
{
// Using inheritance for only input_iterator_tag helps to avoid
// ambiguities when a stdlib implementation dispatches on a
// function which is overloaded on both input_iterator_tag and
// output_iterator_tag, as STLPort does, in its __valid_range
// function. I claim it's better to avoid the ambiguity in these
// cases.
operator std::output_iterator_tag() const
{
return std::output_iterator_tag();
}
};
//
// True iff the user has explicitly disabled writability of this
// iterator. Pass the iterator_facade's Value parameter and its
// nested ::reference type.
//
template <class ValueParam, class Reference>
struct iterator_writability_disabled
# ifdef BOOST_ITERATOR_REF_CONSTNESS_KILLS_WRITABILITY // Adding Thomas' logic?
: mpl::or_<
is_const<Reference>
, boost::detail::indirect_traits::is_reference_to_const<Reference>
, is_const<ValueParam>
>
# else
: is_const<ValueParam>
# endif
{};
//
// Convert an iterator_facade's traversal category, Value parameter,
// and ::reference type to an appropriate old-style category.
//
// Due to changeset 21683, this now never results in a category convertible
// to output_iterator_tag.
//
// Change at: https://svn.boost.org/trac/boost/changeset/21683
template <class Traversal, class ValueParam, class Reference>
struct iterator_facade_default_category
: mpl::eval_if<
mpl::and_<
is_reference<Reference>
, is_convertible<Traversal,forward_traversal_tag>
>
, mpl::eval_if<
is_convertible<Traversal,random_access_traversal_tag>
, mpl::identity<std::random_access_iterator_tag>
, mpl::if_<
is_convertible<Traversal,bidirectional_traversal_tag>
, std::bidirectional_iterator_tag
, std::forward_iterator_tag
>
>
, typename mpl::eval_if<
mpl::and_<
is_convertible<Traversal, single_pass_traversal_tag>
// check for readability
, is_convertible<Reference, ValueParam>
>
, mpl::identity<std::input_iterator_tag>
, mpl::identity<Traversal>
>
>
{
};
// True iff T is convertible to an old-style iterator category.
template <class T>
struct is_iterator_category
: mpl::or_<
is_convertible<T,std::input_iterator_tag>
, is_convertible<T,std::output_iterator_tag>
>
{
};
template <class T>
struct is_iterator_traversal
: is_convertible<T,incrementable_traversal_tag>
{};
//
// A composite iterator_category tag convertible to Category (a pure
// old-style category) and Traversal (a pure traversal tag).
// Traversal must be a strict increase of the traversal power given by
// Category.
//
template <class Category, class Traversal>
struct iterator_category_with_traversal
: Category, Traversal
{
// Make sure this isn't used to build any categories where
// convertibility to Traversal is redundant. Should just use the
// Category element in that case.
BOOST_MPL_ASSERT_NOT((
is_convertible<
typename iterator_category_to_traversal<Category>::type
, Traversal
>));
BOOST_MPL_ASSERT((is_iterator_category<Category>));
BOOST_MPL_ASSERT_NOT((is_iterator_category<Traversal>));
BOOST_MPL_ASSERT_NOT((is_iterator_traversal<Category>));
# if !BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1310))
BOOST_MPL_ASSERT((is_iterator_traversal<Traversal>));
# endif
};
// Computes an iterator_category tag whose traversal is Traversal and
// which is appropriate for an iterator
template <class Traversal, class ValueParam, class Reference>
struct facade_iterator_category_impl
{
BOOST_MPL_ASSERT_NOT((is_iterator_category<Traversal>));
typedef typename iterator_facade_default_category<
Traversal,ValueParam,Reference
>::type category;
typedef typename mpl::if_<
is_same<
Traversal
, typename iterator_category_to_traversal<category>::type
>
, category
, iterator_category_with_traversal<category,Traversal>
>::type type;
};
//
// Compute an iterator_category for iterator_facade
//
template <class CategoryOrTraversal, class ValueParam, class Reference>
struct facade_iterator_category
: mpl::eval_if<
is_iterator_category<CategoryOrTraversal>
, mpl::identity<CategoryOrTraversal> // old-style categories are fine as-is
, facade_iterator_category_impl<CategoryOrTraversal,ValueParam,Reference>
>
{
};
}}} // namespace boost::iterators::detail
# include <boost/iterator/detail/config_undef.hpp>
#endif // FACADE_ITERATOR_CATEGORY_DWA20031118_HPP

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// Copyright David Abrahams 2003. 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)
#ifndef MINIMUM_CATEGORY_DWA20031119_HPP
# define MINIMUM_CATEGORY_DWA20031119_HPP
# include <boost/iterator/minimum_category.hpp>
namespace boost {
// This import below (as well as the whole header) is for backward compatibility
// with boost/token_iterator.hpp. It should be removed as soon as that header is fixed.
namespace detail {
using iterators::minimum_category;
} // namespace detail
} // namespace boost
#endif // MINIMUM_CATEGORY_DWA20031119_HPP

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// Copyright (C) 2017 Michel Morin.
//
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_ITERATOR_DISTANCE_HPP
#define BOOST_ITERATOR_DISTANCE_HPP
#include <boost/config.hpp>
#include <boost/iterator/iterator_categories.hpp>
#include <boost/iterator/iterator_traits.hpp>
namespace boost {
namespace iterators {
namespace detail {
template <typename SinglePassIterator>
inline BOOST_CXX14_CONSTEXPR typename iterator_difference<SinglePassIterator>::type
distance_impl(
SinglePassIterator first
, SinglePassIterator last
, single_pass_traversal_tag
)
{
typename iterator_difference<SinglePassIterator>::type n = 0;
while (first != last) {
++first;
++n;
}
return n;
}
template <typename RandomAccessIterator>
inline BOOST_CXX14_CONSTEXPR typename iterator_difference<RandomAccessIterator>::type
distance_impl(
RandomAccessIterator first
, RandomAccessIterator last
, random_access_traversal_tag
)
{
return last - first;
}
}
namespace distance_adl_barrier {
template <typename SinglePassIterator>
inline BOOST_CXX14_CONSTEXPR typename iterator_difference<SinglePassIterator>::type
distance(SinglePassIterator first, SinglePassIterator last)
{
return detail::distance_impl(
first, last, typename iterator_traversal<SinglePassIterator>::type()
);
}
}
using namespace distance_adl_barrier;
} // namespace iterators
using namespace iterators::distance_adl_barrier;
} // namespace boost
#endif

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// (C) Copyright David Abrahams 2002.
// (C) Copyright Jeremy Siek 2002.
// (C) Copyright Thomas Witt 2002.
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_FILTER_ITERATOR_23022003THW_HPP
#define BOOST_FILTER_ITERATOR_23022003THW_HPP
#include <boost/iterator/iterator_adaptor.hpp>
#include <boost/iterator/iterator_categories.hpp>
#include <boost/type_traits/is_class.hpp>
#include <boost/static_assert.hpp>
namespace boost {
namespace iterators {
template <class Predicate, class Iterator>
class filter_iterator;
namespace detail
{
template <class Predicate, class Iterator>
struct filter_iterator_base
{
typedef iterator_adaptor<
filter_iterator<Predicate, Iterator>
, Iterator
, use_default
, typename mpl::if_<
is_convertible<
typename iterator_traversal<Iterator>::type
, random_access_traversal_tag
>
, bidirectional_traversal_tag
, use_default
>::type
> type;
};
}
template <class Predicate, class Iterator>
class filter_iterator
: public detail::filter_iterator_base<Predicate, Iterator>::type
{
typedef typename detail::filter_iterator_base<
Predicate, Iterator
>::type super_t;
friend class iterator_core_access;
public:
filter_iterator() { }
filter_iterator(Predicate f, Iterator x, Iterator end_ = Iterator())
: super_t(x), m_predicate(f), m_end(end_)
{
satisfy_predicate();
}
filter_iterator(Iterator x, Iterator end_ = Iterator())
: super_t(x), m_predicate(), m_end(end_)
{
// Pro8 is a little too aggressive about instantiating the
// body of this function.
#if !BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003))
// Don't allow use of this constructor if Predicate is a
// function pointer type, since it will be 0.
BOOST_STATIC_ASSERT(is_class<Predicate>::value);
#endif
satisfy_predicate();
}
template<class OtherIterator>
filter_iterator(
filter_iterator<Predicate, OtherIterator> const& t
, typename enable_if_convertible<OtherIterator, Iterator>::type* = 0
)
: super_t(t.base()), m_predicate(t.predicate()), m_end(t.end()) {}
Predicate predicate() const { return m_predicate; }
Iterator end() const { return m_end; }
private:
void increment()
{
++(this->base_reference());
satisfy_predicate();
}
void decrement()
{
while(!this->m_predicate(*--(this->base_reference()))){};
}
void satisfy_predicate()
{
while (this->base() != this->m_end && !this->m_predicate(*this->base()))
++(this->base_reference());
}
// Probably should be the initial base class so it can be
// optimized away via EBO if it is an empty class.
Predicate m_predicate;
Iterator m_end;
};
template <class Predicate, class Iterator>
inline filter_iterator<Predicate,Iterator>
make_filter_iterator(Predicate f, Iterator x, Iterator end = Iterator())
{
return filter_iterator<Predicate,Iterator>(f,x,end);
}
template <class Predicate, class Iterator>
inline filter_iterator<Predicate,Iterator>
make_filter_iterator(
typename iterators::enable_if<
is_class<Predicate>
, Iterator
>::type x
, Iterator end = Iterator())
{
return filter_iterator<Predicate,Iterator>(x,end);
}
} // namespace iterators
using iterators::filter_iterator;
using iterators::make_filter_iterator;
} // namespace boost
#endif // BOOST_FILTER_ITERATOR_23022003THW_HPP

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// Copyright 2009 (C) Dean Michael Berris <me@deanberris.com>
// Copyright 2012 (C) Google, Inc.
// Copyright 2012 (C) Jeffrey Lee Hellrung, Jr.
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
#ifndef BOOST_FUNCTION_INPUT_ITERATOR
#define BOOST_FUNCTION_INPUT_ITERATOR
#include <boost/config.hpp>
#include <boost/assert.hpp>
#include <boost/core/addressof.hpp>
#include <boost/type_traits/conditional.hpp>
#include <boost/function_types/is_function_pointer.hpp>
#include <boost/function_types/result_type.hpp>
#include <boost/iterator/iterator_facade.hpp>
#include <boost/none.hpp>
#include <boost/optional/optional.hpp>
#include <boost/utility/result_of.hpp>
#ifdef BOOST_RESULT_OF_USE_TR1
#include <boost/type_traits/is_function.hpp>
#endif
namespace boost {
namespace iterators {
namespace impl {
// Computes the return type of an lvalue-call with an empty argument,
// i.e. decltype(declval<F&>()()). F should be a nullary lvalue-callable
// or function.
template <class F>
struct result_of_nullary_lvalue_call
{
typedef typename result_of<
#ifdef BOOST_RESULT_OF_USE_TR1
typename boost::conditional<is_function<F>::value, F&, F>::type()
#else
F&()
#endif
>::type type;
};
template <class Function, class Input>
class function_input_iterator :
public iterator_facade<
function_input_iterator<Function, Input>,
typename result_of_nullary_lvalue_call<Function>::type,
single_pass_traversal_tag,
typename result_of_nullary_lvalue_call<Function>::type const &
>
{
public:
function_input_iterator() {}
function_input_iterator(Function & f_, Input state_ = Input())
: f(boost::addressof(f_)), state(state_) {}
void increment() {
if(value)
value = none;
else
(*f)();
++state;
}
typename result_of_nullary_lvalue_call<Function>::type const &
dereference() const {
return (value ? value : value = (*f)()).get();
}
bool equal(function_input_iterator const & other) const {
return f == other.f && state == other.state;
}
private:
Function * f;
Input state;
mutable optional<typename result_of_nullary_lvalue_call<Function>::type> value;
};
template <class Function, class Input>
class function_pointer_input_iterator :
public iterator_facade<
function_pointer_input_iterator<Function, Input>,
typename function_types::result_type<Function>::type,
single_pass_traversal_tag,
typename function_types::result_type<Function>::type const &
>
{
public:
function_pointer_input_iterator() {}
function_pointer_input_iterator(Function &f_, Input state_ = Input())
: f(f_), state(state_) {}
void increment() {
if(value)
value = none;
else
(*f)();
++state;
}
typename function_types::result_type<Function>::type const &
dereference() const {
return (value ? value : value = (*f)()).get();
}
bool equal(function_pointer_input_iterator const & other) const {
return f == other.f && state == other.state;
}
private:
Function f;
Input state;
mutable optional<typename function_types::result_type<Function>::type> value;
};
} // namespace impl
template <class Function, class Input>
class function_input_iterator :
public boost::conditional<
function_types::is_function_pointer<Function>::value,
impl::function_pointer_input_iterator<Function,Input>,
impl::function_input_iterator<Function,Input>
>::type
{
typedef typename boost::conditional<
function_types::is_function_pointer<Function>::value,
impl::function_pointer_input_iterator<Function,Input>,
impl::function_input_iterator<Function,Input>
>::type base_type;
public:
function_input_iterator(Function & f, Input i)
: base_type(f, i) {}
};
template <class Function, class Input>
inline function_input_iterator<Function, Input>
make_function_input_iterator(Function & f, Input state) {
typedef function_input_iterator<Function, Input> result_t;
return result_t(f, state);
}
template <class Function, class Input>
inline function_input_iterator<Function*, Input>
make_function_input_iterator(Function * f, Input state) {
typedef function_input_iterator<Function*, Input> result_t;
return result_t(f, state);
}
struct infinite
{
infinite & operator++() { return *this; }
infinite & operator++(int) { return *this; }
bool operator==(infinite &) const { return false; };
bool operator==(infinite const &) const { return false; };
};
} // namespace iterators
using iterators::function_input_iterator;
using iterators::make_function_input_iterator;
using iterators::infinite;
} // namespace boost
#endif

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// (C) Copyright Jeremy Siek 2001.
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
// Revision History:
// 27 Feb 2001 Jeremy Siek
// Initial checkin.
#ifndef BOOST_ITERATOR_FUNCTION_OUTPUT_ITERATOR_HPP
#define BOOST_ITERATOR_FUNCTION_OUTPUT_ITERATOR_HPP
#include <iterator>
namespace boost {
namespace iterators {
template <class UnaryFunction>
class function_output_iterator {
typedef function_output_iterator self;
public:
typedef std::output_iterator_tag iterator_category;
typedef void value_type;
typedef void difference_type;
typedef void pointer;
typedef void reference;
explicit function_output_iterator() {}
explicit function_output_iterator(const UnaryFunction& f)
: m_f(f) {}
struct output_proxy {
output_proxy(UnaryFunction& f) : m_f(f) { }
template <class T> output_proxy& operator=(const T& value) {
m_f(value);
return *this;
}
UnaryFunction& m_f;
};
output_proxy operator*() { return output_proxy(m_f); }
self& operator++() { return *this; }
self& operator++(int) { return *this; }
private:
UnaryFunction m_f;
};
template <class UnaryFunction>
inline function_output_iterator<UnaryFunction>
make_function_output_iterator(const UnaryFunction& f = UnaryFunction()) {
return function_output_iterator<UnaryFunction>(f);
}
} // namespace iterators
using iterators::function_output_iterator;
using iterators::make_function_output_iterator;
} // namespace boost
#endif // BOOST_ITERATOR_FUNCTION_OUTPUT_ITERATOR_HPP

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// (C) Copyright David Abrahams 2002.
// (C) Copyright Jeremy Siek 2002.
// (C) Copyright Thomas Witt 2002.
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_INDIRECT_ITERATOR_23022003THW_HPP
#define BOOST_INDIRECT_ITERATOR_23022003THW_HPP
#include <boost/iterator/iterator_adaptor.hpp>
#include <boost/pointee.hpp>
#include <boost/indirect_reference.hpp>
#include <boost/detail/indirect_traits.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/type_traits/add_reference.hpp>
#include <boost/mpl/bool.hpp>
#include <boost/mpl/identity.hpp>
#include <boost/mpl/eval_if.hpp>
#include <boost/mpl/not.hpp>
#include <boost/mpl/has_xxx.hpp>
#include <iterator>
#ifdef BOOST_MPL_CFG_NO_HAS_XXX
# include <boost/shared_ptr.hpp>
# include <boost/scoped_ptr.hpp>
# include <boost/mpl/bool.hpp>
# include <memory>
#endif
#include <boost/iterator/detail/config_def.hpp> // must be last #include
namespace boost {
namespace iterators {
template <class Iter, class Value, class Category, class Reference, class Difference>
class indirect_iterator;
namespace detail
{
template <class Iter, class Value, class Category, class Reference, class Difference>
struct indirect_base
{
typedef typename std::iterator_traits<Iter>::value_type dereferenceable;
typedef iterator_adaptor<
indirect_iterator<Iter, Value, Category, Reference, Difference>
, Iter
, typename ia_dflt_help<
Value, pointee<dereferenceable>
>::type
, Category
, typename ia_dflt_help<
Reference
, mpl::eval_if<
is_same<Value,use_default>
, indirect_reference<dereferenceable>
, add_reference<Value>
>
>::type
, Difference
> type;
};
template <>
struct indirect_base<int, int, int, int, int> {};
} // namespace detail
template <
class Iterator
, class Value = use_default
, class Category = use_default
, class Reference = use_default
, class Difference = use_default
>
class indirect_iterator
: public detail::indirect_base<
Iterator, Value, Category, Reference, Difference
>::type
{
typedef typename detail::indirect_base<
Iterator, Value, Category, Reference, Difference
>::type super_t;
friend class iterator_core_access;
public:
indirect_iterator() {}
indirect_iterator(Iterator iter)
: super_t(iter) {}
template <
class Iterator2, class Value2, class Category2
, class Reference2, class Difference2
>
indirect_iterator(
indirect_iterator<
Iterator2, Value2, Category2, Reference2, Difference2
> const& y
, typename enable_if_convertible<Iterator2, Iterator>::type* = 0
)
: super_t(y.base())
{}
private:
typename super_t::reference dereference() const
{
# if BOOST_WORKAROUND(BOOST_BORLANDC, < 0x5A0 )
return const_cast<super_t::reference>(**this->base());
# else
return **this->base();
# endif
}
};
template <class Iter>
inline
indirect_iterator<Iter> make_indirect_iterator(Iter x)
{
return indirect_iterator<Iter>(x);
}
template <class Traits, class Iter>
inline
indirect_iterator<Iter,Traits> make_indirect_iterator(Iter x, Traits* = 0)
{
return indirect_iterator<Iter, Traits>(x);
}
} // namespace iterators
using iterators::indirect_iterator;
using iterators::make_indirect_iterator;
} // namespace boost
#include <boost/iterator/detail/config_undef.hpp>
#endif // BOOST_INDIRECT_ITERATOR_23022003THW_HPP

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// (C) Copyright David Abrahams 2002.
// (C) Copyright Jeremy Siek 2002.
// (C) Copyright Thomas Witt 2002.
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_INTEROPERABLE_23022003THW_HPP
# define BOOST_INTEROPERABLE_23022003THW_HPP
# include <boost/mpl/bool.hpp>
# include <boost/mpl/or.hpp>
# include <boost/type_traits/is_convertible.hpp>
# include <boost/iterator/detail/config_def.hpp> // must appear last
namespace boost {
namespace iterators {
//
// Meta function that determines whether two
// iterator types are considered interoperable.
//
// Two iterator types A,B are considered interoperable if either
// A is convertible to B or vice versa.
// This interoperability definition is in sync with the
// standards requirements on constant/mutable container
// iterators (23.1 [lib.container.requirements]).
//
// For compilers that don't support is_convertible
// is_interoperable gives false positives. See comments
// on operator implementation for consequences.
//
template <typename A, typename B>
struct is_interoperable
# ifdef BOOST_NO_STRICT_ITERATOR_INTEROPERABILITY
: mpl::true_
# else
: mpl::or_<
is_convertible< A, B >
, is_convertible< B, A > >
# endif
{
};
} // namespace iterators
using iterators::is_interoperable;
} // namespace boost
# include <boost/iterator/detail/config_undef.hpp>
#endif // BOOST_INTEROPERABLE_23022003THW_HPP

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// Copyright David Abrahams 2003. 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)
#ifndef IS_LVALUE_ITERATOR_DWA2003112_HPP
# define IS_LVALUE_ITERATOR_DWA2003112_HPP
#include <boost/detail/workaround.hpp>
#include <boost/type_traits/add_lvalue_reference.hpp>
#include <boost/iterator/detail/any_conversion_eater.hpp>
#include <boost/mpl/bool.hpp>
#include <boost/mpl/aux_/lambda_support.hpp>
#include <iterator>
// should be the last #includes
#include <boost/type_traits/integral_constant.hpp>
#include <boost/iterator/detail/config_def.hpp>
#ifndef BOOST_NO_IS_CONVERTIBLE
namespace boost {
namespace iterators {
namespace detail
{
#ifndef BOOST_NO_LVALUE_RETURN_DETECTION
// Calling lvalue_preserver( <expression>, 0 ) returns a reference
// to the expression's result if <expression> is an lvalue, or
// not_an_lvalue() otherwise.
struct not_an_lvalue {};
template <class T>
T& lvalue_preserver(T&, int);
template <class U>
not_an_lvalue lvalue_preserver(U const&, ...);
# define BOOST_LVALUE_PRESERVER(expr) detail::lvalue_preserver(expr,0)
#else
# define BOOST_LVALUE_PRESERVER(expr) expr
#endif
// Guts of is_lvalue_iterator. Value is the iterator's value_type
// and the result is computed in the nested rebind template.
template <class Value>
struct is_lvalue_iterator_impl
{
// Eat implicit conversions so we don't report true for things
// convertible to Value const&
struct conversion_eater
{
conversion_eater(typename add_lvalue_reference<Value>::type);
};
static char tester(conversion_eater, int);
static char (& tester(any_conversion_eater, ...) )[2];
template <class It>
struct rebind
{
static It& x;
BOOST_STATIC_CONSTANT(
bool
, value = (
sizeof(
is_lvalue_iterator_impl<Value>::tester(
BOOST_LVALUE_PRESERVER(*x), 0
)
) == 1
)
);
};
};
#undef BOOST_LVALUE_PRESERVER
//
// void specializations to handle std input and output iterators
//
template <>
struct is_lvalue_iterator_impl<void>
{
template <class It>
struct rebind : boost::mpl::false_
{};
};
#ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS
template <>
struct is_lvalue_iterator_impl<const void>
{
template <class It>
struct rebind : boost::mpl::false_
{};
};
template <>
struct is_lvalue_iterator_impl<volatile void>
{
template <class It>
struct rebind : boost::mpl::false_
{};
};
template <>
struct is_lvalue_iterator_impl<const volatile void>
{
template <class It>
struct rebind : boost::mpl::false_
{};
};
#endif
//
// This level of dispatching is required for Borland. We might save
// an instantiation by removing it for others.
//
template <class It>
struct is_readable_lvalue_iterator_impl
: is_lvalue_iterator_impl<
BOOST_DEDUCED_TYPENAME std::iterator_traits<It>::value_type const
>::template rebind<It>
{};
template <class It>
struct is_non_const_lvalue_iterator_impl
: is_lvalue_iterator_impl<
BOOST_DEDUCED_TYPENAME std::iterator_traits<It>::value_type
>::template rebind<It>
{};
} // namespace detail
template< typename T > struct is_lvalue_iterator
: public ::boost::integral_constant<bool,::boost::iterators::detail::is_readable_lvalue_iterator_impl<T>::value>
{
public:
BOOST_MPL_AUX_LAMBDA_SUPPORT(1,is_lvalue_iterator,(T))
};
template< typename T > struct is_non_const_lvalue_iterator
: public ::boost::integral_constant<bool,::boost::iterators::detail::is_non_const_lvalue_iterator_impl<T>::value>
{
public:
BOOST_MPL_AUX_LAMBDA_SUPPORT(1,is_non_const_lvalue_iterator,(T))
};
} // namespace iterators
using iterators::is_lvalue_iterator;
using iterators::is_non_const_lvalue_iterator;
} // namespace boost
#endif
#include <boost/iterator/detail/config_undef.hpp>
#endif // IS_LVALUE_ITERATOR_DWA2003112_HPP

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// Copyright David Abrahams 2003. 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)
#ifndef IS_READABLE_ITERATOR_DWA2003112_HPP
# define IS_READABLE_ITERATOR_DWA2003112_HPP
#include <boost/mpl/bool.hpp>
#include <boost/mpl/aux_/lambda_support.hpp>
#include <boost/type_traits/add_lvalue_reference.hpp>
#include <boost/iterator/detail/any_conversion_eater.hpp>
#include <iterator>
// should be the last #include
#include <boost/type_traits/integral_constant.hpp>
#include <boost/iterator/detail/config_def.hpp>
#ifndef BOOST_NO_IS_CONVERTIBLE
namespace boost {
namespace iterators {
namespace detail
{
// Guts of is_readable_iterator. Value is the iterator's value_type
// and the result is computed in the nested rebind template.
template <class Value>
struct is_readable_iterator_impl
{
static char tester(typename add_lvalue_reference<Value>::type, int);
static char (& tester(any_conversion_eater, ...) )[2];
template <class It>
struct rebind
{
static It& x;
BOOST_STATIC_CONSTANT(
bool
, value = (
sizeof(
is_readable_iterator_impl<Value>::tester(*x, 1)
) == 1
)
);
};
};
#undef BOOST_READABLE_PRESERVER
//
// void specializations to handle std input and output iterators
//
template <>
struct is_readable_iterator_impl<void>
{
template <class It>
struct rebind : boost::mpl::false_
{};
};
#ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS
template <>
struct is_readable_iterator_impl<const void>
{
template <class It>
struct rebind : boost::mpl::false_
{};
};
template <>
struct is_readable_iterator_impl<volatile void>
{
template <class It>
struct rebind : boost::mpl::false_
{};
};
template <>
struct is_readable_iterator_impl<const volatile void>
{
template <class It>
struct rebind : boost::mpl::false_
{};
};
#endif
//
// This level of dispatching is required for Borland. We might save
// an instantiation by removing it for others.
//
template <class It>
struct is_readable_iterator_impl2
: is_readable_iterator_impl<
BOOST_DEDUCED_TYPENAME std::iterator_traits<It>::value_type const
>::template rebind<It>
{};
} // namespace detail
template< typename T > struct is_readable_iterator
: public ::boost::integral_constant<bool,::boost::iterators::detail::is_readable_iterator_impl2<T>::value>
{
public:
BOOST_MPL_AUX_LAMBDA_SUPPORT(1,is_readable_iterator,(T))
};
} // namespace iterators
using iterators::is_readable_iterator;
} // namespace boost
#endif
#include <boost/iterator/detail/config_undef.hpp>
#endif // IS_READABLE_ITERATOR_DWA2003112_HPP

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// (C) Copyright David Abrahams 2002.
// (C) Copyright Jeremy Siek 2002.
// (C) Copyright Thomas Witt 2002.
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_ITERATOR_ADAPTOR_23022003THW_HPP
#define BOOST_ITERATOR_ADAPTOR_23022003THW_HPP
#include <boost/static_assert.hpp>
#include <boost/core/use_default.hpp>
#include <boost/iterator/iterator_categories.hpp>
#include <boost/iterator/iterator_facade.hpp>
#include <boost/iterator/detail/enable_if.hpp>
#include <boost/mpl/and.hpp>
#include <boost/mpl/not.hpp>
#include <boost/mpl/or.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/type_traits/is_convertible.hpp>
#ifdef BOOST_ITERATOR_REF_CONSTNESS_KILLS_WRITABILITY
# include <boost/type_traits/remove_reference.hpp>
#endif
#include <boost/type_traits/add_reference.hpp>
#include <boost/iterator/detail/config_def.hpp>
#include <boost/iterator/iterator_traits.hpp>
namespace boost {
namespace iterators {
// Used as a default template argument internally, merely to
// indicate "use the default", this can also be passed by users
// explicitly in order to specify that the default should be used.
using boost::use_default;
} // namespace iterators
// the incompleteness of use_default causes massive problems for
// is_convertible (naturally). This workaround is fortunately not
// needed for vc6/vc7.
template<class To>
struct is_convertible<use_default,To>
: mpl::false_ {};
namespace iterators {
namespace detail
{
//
// Result type used in enable_if_convertible meta function.
// This can be an incomplete type, as only pointers to
// enable_if_convertible< ... >::type are used.
// We could have used void for this, but conversion to
// void* is just to easy.
//
struct enable_type;
}
//
// enable_if for use in adapted iterators constructors.
//
// In order to provide interoperability between adapted constant and
// mutable iterators, adapted iterators will usually provide templated
// conversion constructors of the following form
//
// template <class BaseIterator>
// class adapted_iterator :
// public iterator_adaptor< adapted_iterator<Iterator>, Iterator >
// {
// public:
//
// ...
//
// template <class OtherIterator>
// adapted_iterator(
// OtherIterator const& it
// , typename enable_if_convertible<OtherIterator, Iterator>::type* = 0);
//
// ...
// };
//
// enable_if_convertible is used to remove those overloads from the overload
// set that cannot be instantiated. For all practical purposes only overloads
// for constant/mutable interaction will remain. This has the advantage that
// meta functions like boost::is_convertible do not return false positives,
// as they can only look at the signature of the conversion constructor
// and not at the actual instantiation.
//
// enable_if_interoperable can be safely used in user code. It falls back to
// always enabled for compilers that don't support enable_if or is_convertible.
// There is no need for compiler specific workarounds in user code.
//
// The operators implementation relies on boost::is_convertible not returning
// false positives for user/library defined iterator types. See comments
// on operator implementation for consequences.
//
# if defined(BOOST_NO_IS_CONVERTIBLE) || defined(BOOST_NO_SFINAE)
template <class From, class To>
struct enable_if_convertible
{
typedef boost::iterators::detail::enable_type type;
};
# elif BOOST_WORKAROUND(_MSC_FULL_VER, BOOST_TESTED_AT(13102292))
// For some reason vc7.1 needs us to "cut off" instantiation
// of is_convertible in a few cases.
template<typename From, typename To>
struct enable_if_convertible
: iterators::enable_if<
mpl::or_<
is_same<From,To>
, is_convertible<From, To>
>
, boost::iterators::detail::enable_type
>
{};
# else
template<typename From, typename To>
struct enable_if_convertible
: iterators::enable_if<
is_convertible<From, To>
, boost::iterators::detail::enable_type
>
{};
# endif
//
// Default template argument handling for iterator_adaptor
//
namespace detail
{
// If T is use_default, return the result of invoking
// DefaultNullaryFn, otherwise return T.
template <class T, class DefaultNullaryFn>
struct ia_dflt_help
: mpl::eval_if<
is_same<T, use_default>
, DefaultNullaryFn
, mpl::identity<T>
>
{
};
// A metafunction which computes an iterator_adaptor's base class,
// a specialization of iterator_facade.
template <
class Derived
, class Base
, class Value
, class Traversal
, class Reference
, class Difference
>
struct iterator_adaptor_base
{
typedef iterator_facade<
Derived
# ifdef BOOST_ITERATOR_REF_CONSTNESS_KILLS_WRITABILITY
, typename boost::iterators::detail::ia_dflt_help<
Value
, mpl::eval_if<
is_same<Reference,use_default>
, iterator_value<Base>
, remove_reference<Reference>
>
>::type
# else
, typename boost::iterators::detail::ia_dflt_help<
Value, iterator_value<Base>
>::type
# endif
, typename boost::iterators::detail::ia_dflt_help<
Traversal
, iterator_traversal<Base>
>::type
, typename boost::iterators::detail::ia_dflt_help<
Reference
, mpl::eval_if<
is_same<Value,use_default>
, iterator_reference<Base>
, add_reference<Value>
>
>::type
, typename boost::iterators::detail::ia_dflt_help<
Difference, iterator_difference<Base>
>::type
>
type;
};
// workaround for aC++ CR JAGaf33512
template <class Tr1, class Tr2>
inline void iterator_adaptor_assert_traversal ()
{
BOOST_STATIC_ASSERT((is_convertible<Tr1, Tr2>::value));
}
}
//
// Iterator Adaptor
//
// The parameter ordering changed slightly with respect to former
// versions of iterator_adaptor The idea is that when the user needs
// to fiddle with the reference type it is highly likely that the
// iterator category has to be adjusted as well. Any of the
// following four template arguments may be ommitted or explicitly
// replaced by use_default.
//
// Value - if supplied, the value_type of the resulting iterator, unless
// const. If const, a conforming compiler strips constness for the
// value_type. If not supplied, iterator_traits<Base>::value_type is used
//
// Category - the traversal category of the resulting iterator. If not
// supplied, iterator_traversal<Base>::type is used.
//
// Reference - the reference type of the resulting iterator, and in
// particular, the result type of operator*(). If not supplied but
// Value is supplied, Value& is used. Otherwise
// iterator_traits<Base>::reference is used.
//
// Difference - the difference_type of the resulting iterator. If not
// supplied, iterator_traits<Base>::difference_type is used.
//
template <
class Derived
, class Base
, class Value = use_default
, class Traversal = use_default
, class Reference = use_default
, class Difference = use_default
>
class iterator_adaptor
: public boost::iterators::detail::iterator_adaptor_base<
Derived, Base, Value, Traversal, Reference, Difference
>::type
{
friend class iterator_core_access;
protected:
typedef typename boost::iterators::detail::iterator_adaptor_base<
Derived, Base, Value, Traversal, Reference, Difference
>::type super_t;
public:
iterator_adaptor() {}
explicit iterator_adaptor(Base const &iter)
: m_iterator(iter)
{
}
typedef Base base_type;
Base const& base() const
{ return m_iterator; }
protected:
// for convenience in derived classes
typedef iterator_adaptor<Derived,Base,Value,Traversal,Reference,Difference> iterator_adaptor_;
//
// lvalue access to the Base object for Derived
//
Base const& base_reference() const
{ return m_iterator; }
Base& base_reference()
{ return m_iterator; }
private:
//
// Core iterator interface for iterator_facade. This is private
// to prevent temptation for Derived classes to use it, which
// will often result in an error. Derived classes should use
// base_reference(), above, to get direct access to m_iterator.
//
typename super_t::reference dereference() const
{ return *m_iterator; }
template <
class OtherDerived, class OtherIterator, class V, class C, class R, class D
>
bool equal(iterator_adaptor<OtherDerived, OtherIterator, V, C, R, D> const& x) const
{
// Maybe readd with same_distance
// BOOST_STATIC_ASSERT(
// (detail::same_category_and_difference<Derived,OtherDerived>::value)
// );
return m_iterator == x.base();
}
typedef typename iterator_category_to_traversal<
typename super_t::iterator_category
>::type my_traversal;
# define BOOST_ITERATOR_ADAPTOR_ASSERT_TRAVERSAL(cat) \
boost::iterators::detail::iterator_adaptor_assert_traversal<my_traversal, cat>();
void advance(typename super_t::difference_type n)
{
BOOST_ITERATOR_ADAPTOR_ASSERT_TRAVERSAL(random_access_traversal_tag)
m_iterator += n;
}
void increment() { ++m_iterator; }
void decrement()
{
BOOST_ITERATOR_ADAPTOR_ASSERT_TRAVERSAL(bidirectional_traversal_tag)
--m_iterator;
}
template <
class OtherDerived, class OtherIterator, class V, class C, class R, class D
>
typename super_t::difference_type distance_to(
iterator_adaptor<OtherDerived, OtherIterator, V, C, R, D> const& y) const
{
BOOST_ITERATOR_ADAPTOR_ASSERT_TRAVERSAL(random_access_traversal_tag)
// Maybe readd with same_distance
// BOOST_STATIC_ASSERT(
// (detail::same_category_and_difference<Derived,OtherDerived>::value)
// );
return y.base() - m_iterator;
}
# undef BOOST_ITERATOR_ADAPTOR_ASSERT_TRAVERSAL
private: // data members
Base m_iterator;
};
} // namespace iterators
using iterators::iterator_adaptor;
using iterators::enable_if_convertible;
} // namespace boost
#include <boost/iterator/detail/config_undef.hpp>
#endif // BOOST_ITERATOR_ADAPTOR_23022003THW_HPP

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// (C) Copyright Jeremy Siek 2002.
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_ITERATOR_ARCHETYPES_HPP
#define BOOST_ITERATOR_ARCHETYPES_HPP
#include <boost/iterator/iterator_categories.hpp>
#include <boost/operators.hpp>
#include <boost/static_assert.hpp>
#include <boost/iterator/detail/facade_iterator_category.hpp>
#include <boost/type_traits/is_const.hpp>
#include <boost/type_traits/add_const.hpp>
#include <boost/type_traits/remove_const.hpp>
#include <boost/type_traits/remove_cv.hpp>
#include <boost/concept_archetype.hpp>
#include <boost/mpl/bitand.hpp>
#include <boost/mpl/int.hpp>
#include <boost/mpl/equal_to.hpp>
#include <boost/mpl/if.hpp>
#include <boost/mpl/eval_if.hpp>
#include <boost/mpl/and.hpp>
#include <boost/mpl/identity.hpp>
#include <cstddef>
namespace boost {
namespace iterators {
template <class Value, class AccessCategory>
struct access_archetype;
template <class Derived, class Value, class AccessCategory, class TraversalCategory>
struct traversal_archetype;
namespace archetypes
{
enum {
readable_iterator_bit = 1
, writable_iterator_bit = 2
, swappable_iterator_bit = 4
, lvalue_iterator_bit = 8
};
// Not quite tags, since dispatching wouldn't work.
typedef mpl::int_<readable_iterator_bit>::type readable_iterator_t;
typedef mpl::int_<writable_iterator_bit>::type writable_iterator_t;
typedef mpl::int_<
(readable_iterator_bit|writable_iterator_bit)
>::type readable_writable_iterator_t;
typedef mpl::int_<
(readable_iterator_bit|lvalue_iterator_bit)
>::type readable_lvalue_iterator_t;
typedef mpl::int_<
(lvalue_iterator_bit|writable_iterator_bit)
>::type writable_lvalue_iterator_t;
typedef mpl::int_<swappable_iterator_bit>::type swappable_iterator_t;
typedef mpl::int_<lvalue_iterator_bit>::type lvalue_iterator_t;
template <class Derived, class Base>
struct has_access
: mpl::equal_to<
mpl::bitand_<Derived,Base>
, Base
>
{};
}
namespace detail
{
template <class T>
struct assign_proxy
{
assign_proxy& operator=(T) { return *this; }
};
template <class T>
struct read_proxy
{
operator T() { return static_object<T>::get(); }
};
template <class T>
struct read_write_proxy
: read_proxy<T> // Use to inherit from assign_proxy, but that doesn't work. -JGS
{
read_write_proxy& operator=(T) { return *this; }
};
template <class T>
struct arrow_proxy
{
T const* operator->() const { return 0; }
};
struct no_operator_brackets {};
template <class ValueType>
struct readable_operator_brackets
{
read_proxy<ValueType> operator[](std::ptrdiff_t n) const { return read_proxy<ValueType>(); }
};
template <class ValueType>
struct writable_operator_brackets
{
read_write_proxy<ValueType> operator[](std::ptrdiff_t n) const { return read_write_proxy<ValueType>(); }
};
template <class Value, class AccessCategory, class TraversalCategory>
struct operator_brackets
: mpl::eval_if<
is_convertible<TraversalCategory, random_access_traversal_tag>
, mpl::eval_if<
archetypes::has_access<
AccessCategory
, archetypes::writable_iterator_t
>
, mpl::identity<writable_operator_brackets<Value> >
, mpl::if_<
archetypes::has_access<
AccessCategory
, archetypes::readable_iterator_t
>
, readable_operator_brackets<Value>
, no_operator_brackets
>
>
, mpl::identity<no_operator_brackets>
>::type
{};
template <class TraversalCategory>
struct traversal_archetype_impl
{
template <class Derived,class Value> struct archetype;
};
// Constructor argument for those iterators that
// are not default constructible
struct ctor_arg {};
template <class Derived, class Value, class TraversalCategory>
struct traversal_archetype_
: traversal_archetype_impl<TraversalCategory>::template archetype<Derived,Value>
{
typedef typename
traversal_archetype_impl<TraversalCategory>::template archetype<Derived,Value>
base;
traversal_archetype_() {}
traversal_archetype_(ctor_arg arg)
: base(arg)
{}
};
template <>
struct traversal_archetype_impl<incrementable_traversal_tag>
{
template<class Derived, class Value>
struct archetype
{
explicit archetype(ctor_arg) {}
struct bogus { }; // This use to be void, but that causes trouble for iterator_facade. Need more research. -JGS
typedef bogus difference_type;
Derived& operator++() { return (Derived&)static_object<Derived>::get(); }
Derived operator++(int) const { return (Derived&)static_object<Derived>::get(); }
};
};
template <>
struct traversal_archetype_impl<single_pass_traversal_tag>
{
template<class Derived, class Value>
struct archetype
: public equality_comparable< traversal_archetype_<Derived, Value, single_pass_traversal_tag> >,
public traversal_archetype_<Derived, Value, incrementable_traversal_tag>
{
explicit archetype(ctor_arg arg)
: traversal_archetype_<Derived, Value, incrementable_traversal_tag>(arg)
{}
typedef std::ptrdiff_t difference_type;
};
};
template <class Derived, class Value>
bool operator==(traversal_archetype_<Derived, Value, single_pass_traversal_tag> const&,
traversal_archetype_<Derived, Value, single_pass_traversal_tag> const&) { return true; }
template <>
struct traversal_archetype_impl<forward_traversal_tag>
{
template<class Derived, class Value>
struct archetype
: public traversal_archetype_<Derived, Value, single_pass_traversal_tag>
{
archetype()
: traversal_archetype_<Derived, Value, single_pass_traversal_tag>(ctor_arg())
{}
};
};
template <>
struct traversal_archetype_impl<bidirectional_traversal_tag>
{
template<class Derived, class Value>
struct archetype
: public traversal_archetype_<Derived, Value, forward_traversal_tag>
{
Derived& operator--() { return static_object<Derived>::get(); }
Derived operator--(int) const { return static_object<Derived>::get(); }
};
};
template <>
struct traversal_archetype_impl<random_access_traversal_tag>
{
template<class Derived, class Value>
struct archetype
: public traversal_archetype_<Derived, Value, bidirectional_traversal_tag>
{
Derived& operator+=(std::ptrdiff_t) { return static_object<Derived>::get(); }
Derived& operator-=(std::ptrdiff_t) { return static_object<Derived>::get(); }
};
};
template <class Derived, class Value>
Derived& operator+(traversal_archetype_<Derived, Value, random_access_traversal_tag> const&,
std::ptrdiff_t) { return static_object<Derived>::get(); }
template <class Derived, class Value>
Derived& operator+(std::ptrdiff_t,
traversal_archetype_<Derived, Value, random_access_traversal_tag> const&)
{ return static_object<Derived>::get(); }
template <class Derived, class Value>
Derived& operator-(traversal_archetype_<Derived, Value, random_access_traversal_tag> const&,
std::ptrdiff_t)
{ return static_object<Derived>::get(); }
template <class Derived, class Value>
std::ptrdiff_t operator-(traversal_archetype_<Derived, Value, random_access_traversal_tag> const&,
traversal_archetype_<Derived, Value, random_access_traversal_tag> const&)
{ return 0; }
template <class Derived, class Value>
bool operator<(traversal_archetype_<Derived, Value, random_access_traversal_tag> const&,
traversal_archetype_<Derived, Value, random_access_traversal_tag> const&)
{ return true; }
template <class Derived, class Value>
bool operator>(traversal_archetype_<Derived, Value, random_access_traversal_tag> const&,
traversal_archetype_<Derived, Value, random_access_traversal_tag> const&)
{ return true; }
template <class Derived, class Value>
bool operator<=(traversal_archetype_<Derived, Value, random_access_traversal_tag> const&,
traversal_archetype_<Derived, Value, random_access_traversal_tag> const&)
{ return true; }
template <class Derived, class Value>
bool operator>=(traversal_archetype_<Derived, Value, random_access_traversal_tag> const&,
traversal_archetype_<Derived, Value, random_access_traversal_tag> const&)
{ return true; }
struct bogus_type;
template <class Value>
struct convertible_type
: mpl::if_< is_const<Value>,
typename remove_const<Value>::type,
bogus_type >
{};
} // namespace detail
template <class> struct undefined;
template <class AccessCategory>
struct iterator_access_archetype_impl
{
template <class Value> struct archetype;
};
template <class Value, class AccessCategory>
struct iterator_access_archetype
: iterator_access_archetype_impl<
AccessCategory
>::template archetype<Value>
{
};
template <>
struct iterator_access_archetype_impl<
archetypes::readable_iterator_t
>
{
template <class Value>
struct archetype
{
typedef typename remove_cv<Value>::type value_type;
typedef Value reference;
typedef Value* pointer;
value_type operator*() const { return static_object<value_type>::get(); }
detail::arrow_proxy<Value> operator->() const { return detail::arrow_proxy<Value>(); }
};
};
template <>
struct iterator_access_archetype_impl<
archetypes::writable_iterator_t
>
{
template <class Value>
struct archetype
{
BOOST_STATIC_ASSERT(!is_const<Value>::value);
typedef void value_type;
typedef void reference;
typedef void pointer;
detail::assign_proxy<Value> operator*() const { return detail::assign_proxy<Value>(); }
};
};
template <>
struct iterator_access_archetype_impl<
archetypes::readable_writable_iterator_t
>
{
template <class Value>
struct archetype
: public virtual iterator_access_archetype<
Value, archetypes::readable_iterator_t
>
{
typedef detail::read_write_proxy<Value> reference;
detail::read_write_proxy<Value> operator*() const { return detail::read_write_proxy<Value>(); }
};
};
template <>
struct iterator_access_archetype_impl<archetypes::readable_lvalue_iterator_t>
{
template <class Value>
struct archetype
: public virtual iterator_access_archetype<
Value, archetypes::readable_iterator_t
>
{
typedef Value& reference;
Value& operator*() const { return static_object<Value>::get(); }
Value* operator->() const { return 0; }
};
};
template <>
struct iterator_access_archetype_impl<archetypes::writable_lvalue_iterator_t>
{
template <class Value>
struct archetype
: public virtual iterator_access_archetype<
Value, archetypes::readable_lvalue_iterator_t
>
{
BOOST_STATIC_ASSERT((!is_const<Value>::value));
};
};
template <class Value, class AccessCategory, class TraversalCategory>
struct iterator_archetype;
template <class Value, class AccessCategory, class TraversalCategory>
struct traversal_archetype_base
: detail::operator_brackets<
typename remove_cv<Value>::type
, AccessCategory
, TraversalCategory
>
, detail::traversal_archetype_<
iterator_archetype<Value, AccessCategory, TraversalCategory>
, Value
, TraversalCategory
>
{
};
namespace detail
{
template <class Value, class AccessCategory, class TraversalCategory>
struct iterator_archetype_base
: iterator_access_archetype<Value, AccessCategory>
, traversal_archetype_base<Value, AccessCategory, TraversalCategory>
{
typedef iterator_access_archetype<Value, AccessCategory> access;
typedef typename detail::facade_iterator_category<
TraversalCategory
, typename mpl::eval_if<
archetypes::has_access<
AccessCategory, archetypes::writable_iterator_t
>
, remove_const<Value>
, add_const<Value>
>::type
, typename access::reference
>::type iterator_category;
// Needed for some broken libraries (see below)
struct workaround_iterator_base
{
typedef typename iterator_archetype_base::iterator_category iterator_category;
typedef Value value_type;
typedef typename traversal_archetype_base<
Value, AccessCategory, TraversalCategory
>::difference_type difference_type;
typedef typename access::pointer pointer;
typedef typename access::reference reference;
};
};
}
template <class Value, class AccessCategory, class TraversalCategory>
struct iterator_archetype
: public detail::iterator_archetype_base<Value, AccessCategory, TraversalCategory>
// These broken libraries require derivation from std::iterator
// (or related magic) in order to handle iter_swap and other
// iterator operations
# if BOOST_WORKAROUND(BOOST_DINKUMWARE_STDLIB, < 310) \
|| BOOST_WORKAROUND(_RWSTD_VER, BOOST_TESTED_AT(0x20101))
, public detail::iterator_archetype_base<
Value, AccessCategory, TraversalCategory
>::workaround_iterator_base
# endif
{
// Derivation from std::iterator above caused references to nested
// types to be ambiguous, so now we have to redeclare them all
// here.
# if BOOST_WORKAROUND(BOOST_DINKUMWARE_STDLIB, < 310) \
|| BOOST_WORKAROUND(_RWSTD_VER, BOOST_TESTED_AT(0x20101))
typedef detail::iterator_archetype_base<
Value,AccessCategory,TraversalCategory
> base;
typedef typename base::value_type value_type;
typedef typename base::reference reference;
typedef typename base::pointer pointer;
typedef typename base::difference_type difference_type;
typedef typename base::iterator_category iterator_category;
# endif
iterator_archetype() { }
iterator_archetype(iterator_archetype const& x)
: detail::iterator_archetype_base<
Value
, AccessCategory
, TraversalCategory
>(x)
{}
iterator_archetype& operator=(iterator_archetype const&)
{ return *this; }
# if 0
// Optional conversion from mutable
iterator_archetype(
iterator_archetype<
typename detail::convertible_type<Value>::type
, AccessCategory
, TraversalCategory> const&
);
# endif
};
} // namespace iterators
// Backward compatibility names
namespace iterator_archetypes = iterators::archetypes;
using iterators::access_archetype;
using iterators::traversal_archetype;
using iterators::iterator_archetype;
using iterators::undefined;
using iterators::iterator_access_archetype_impl;
using iterators::traversal_archetype_base;
} // namespace boost
#endif // BOOST_ITERATOR_ARCHETYPES_HPP

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// (C) Copyright Jeremy Siek 2002.
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_ITERATOR_CATEGORIES_HPP
# define BOOST_ITERATOR_CATEGORIES_HPP
# include <boost/config.hpp>
# include <boost/iterator/detail/config_def.hpp>
# include <boost/detail/workaround.hpp>
# include <boost/mpl/eval_if.hpp>
# include <boost/mpl/identity.hpp>
# include <boost/mpl/placeholders.hpp>
# include <boost/mpl/aux_/lambda_support.hpp>
# include <boost/type_traits/is_convertible.hpp>
# include <boost/static_assert.hpp>
#include <iterator>
namespace boost {
namespace iterators {
//
// Traversal Categories
//
struct no_traversal_tag {};
struct incrementable_traversal_tag
: no_traversal_tag
{
// incrementable_traversal_tag() {}
// incrementable_traversal_tag(std::output_iterator_tag const&) {};
};
struct single_pass_traversal_tag
: incrementable_traversal_tag
{
// single_pass_traversal_tag() {}
// single_pass_traversal_tag(std::input_iterator_tag const&) {};
};
struct forward_traversal_tag
: single_pass_traversal_tag
{
// forward_traversal_tag() {}
// forward_traversal_tag(std::forward_iterator_tag const&) {};
};
struct bidirectional_traversal_tag
: forward_traversal_tag
{
// bidirectional_traversal_tag() {};
// bidirectional_traversal_tag(std::bidirectional_iterator_tag const&) {};
};
struct random_access_traversal_tag
: bidirectional_traversal_tag
{
// random_access_traversal_tag() {};
// random_access_traversal_tag(std::random_access_iterator_tag const&) {};
};
namespace detail
{
//
// Convert a "strictly old-style" iterator category to a traversal
// tag. This is broken out into a separate metafunction to reduce
// the cost of instantiating iterator_category_to_traversal, below,
// for new-style types.
//
template <class Cat>
struct old_category_to_traversal
: mpl::eval_if<
is_convertible<Cat,std::random_access_iterator_tag>
, mpl::identity<random_access_traversal_tag>
, mpl::eval_if<
is_convertible<Cat,std::bidirectional_iterator_tag>
, mpl::identity<bidirectional_traversal_tag>
, mpl::eval_if<
is_convertible<Cat,std::forward_iterator_tag>
, mpl::identity<forward_traversal_tag>
, mpl::eval_if<
is_convertible<Cat,std::input_iterator_tag>
, mpl::identity<single_pass_traversal_tag>
, mpl::eval_if<
is_convertible<Cat,std::output_iterator_tag>
, mpl::identity<incrementable_traversal_tag>
, void
>
>
>
>
>
{};
} // namespace detail
//
// Convert an iterator category into a traversal tag
//
template <class Cat>
struct iterator_category_to_traversal
: mpl::eval_if< // if already convertible to a traversal tag, we're done.
is_convertible<Cat,incrementable_traversal_tag>
, mpl::identity<Cat>
, boost::iterators::detail::old_category_to_traversal<Cat>
>
{};
// Trait to get an iterator's traversal category
template <class Iterator = mpl::_1>
struct iterator_traversal
: iterator_category_to_traversal<
typename std::iterator_traits<Iterator>::iterator_category
>
{};
# ifdef BOOST_MPL_CFG_NO_FULL_LAMBDA_SUPPORT
// Hack because BOOST_MPL_AUX_LAMBDA_SUPPORT doesn't seem to work
// out well. Instantiating the nested apply template also
// requires instantiating iterator_traits on the
// placeholder. Instead we just specialize it as a metafunction
// class.
template <>
struct iterator_traversal<mpl::_1>
{
template <class T>
struct apply : iterator_traversal<T>
{};
};
template <>
struct iterator_traversal<mpl::_>
: iterator_traversal<mpl::_1>
{};
# endif
//
// Convert an iterator traversal to one of the traversal tags.
//
template <class Traversal>
struct pure_traversal_tag
: mpl::eval_if<
is_convertible<Traversal,random_access_traversal_tag>
, mpl::identity<random_access_traversal_tag>
, mpl::eval_if<
is_convertible<Traversal,bidirectional_traversal_tag>
, mpl::identity<bidirectional_traversal_tag>
, mpl::eval_if<
is_convertible<Traversal,forward_traversal_tag>
, mpl::identity<forward_traversal_tag>
, mpl::eval_if<
is_convertible<Traversal,single_pass_traversal_tag>
, mpl::identity<single_pass_traversal_tag>
, mpl::eval_if<
is_convertible<Traversal,incrementable_traversal_tag>
, mpl::identity<incrementable_traversal_tag>
, void
>
>
>
>
>
{
};
//
// Trait to retrieve one of the iterator traversal tags from the iterator category or traversal.
//
template <class Iterator = mpl::_1>
struct pure_iterator_traversal
: pure_traversal_tag<typename iterator_traversal<Iterator>::type>
{};
# ifdef BOOST_MPL_CFG_NO_FULL_LAMBDA_SUPPORT
template <>
struct pure_iterator_traversal<mpl::_1>
{
template <class T>
struct apply : pure_iterator_traversal<T>
{};
};
template <>
struct pure_iterator_traversal<mpl::_>
: pure_iterator_traversal<mpl::_1>
{};
# endif
} // namespace iterators
using iterators::no_traversal_tag;
using iterators::incrementable_traversal_tag;
using iterators::single_pass_traversal_tag;
using iterators::forward_traversal_tag;
using iterators::bidirectional_traversal_tag;
using iterators::random_access_traversal_tag;
using iterators::iterator_category_to_traversal;
using iterators::iterator_traversal;
// This import is needed for backward compatibility with Boost.Range:
// boost/range/detail/demote_iterator_traversal_tag.hpp
// It should be removed when that header is fixed.
namespace detail {
using iterators::pure_traversal_tag;
} // namespace detail
} // namespace boost
#include <boost/iterator/detail/config_undef.hpp>
#endif // BOOST_ITERATOR_CATEGORIES_HPP

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// (C) Copyright Jeremy Siek 2002.
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_ITERATOR_CONCEPTS_HPP
#define BOOST_ITERATOR_CONCEPTS_HPP
#include <boost/concept_check.hpp>
#include <boost/iterator/iterator_categories.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/type_traits/is_integral.hpp>
#include <boost/mpl/bool.hpp>
#include <boost/mpl/if.hpp>
#include <boost/mpl/and.hpp>
#include <boost/mpl/or.hpp>
#include <boost/static_assert.hpp>
// Use boost/limits to work around missing limits headers on some compilers
#include <boost/limits.hpp>
#include <boost/config.hpp>
#include <algorithm>
#include <iterator>
#include <boost/concept/detail/concept_def.hpp>
namespace boost_concepts
{
// Used a different namespace here (instead of "boost") so that the
// concept descriptions do not take for granted the names in
// namespace boost.
//===========================================================================
// Iterator Access Concepts
BOOST_concept(ReadableIterator,(Iterator))
: boost::Assignable<Iterator>
, boost::CopyConstructible<Iterator>
{
typedef BOOST_DEDUCED_TYPENAME std::iterator_traits<Iterator>::value_type value_type;
typedef BOOST_DEDUCED_TYPENAME std::iterator_traits<Iterator>::reference reference;
BOOST_CONCEPT_USAGE(ReadableIterator)
{
value_type v = *i;
boost::ignore_unused_variable_warning(v);
}
private:
Iterator i;
};
template <
typename Iterator
, typename ValueType = BOOST_DEDUCED_TYPENAME std::iterator_traits<Iterator>::value_type
>
struct WritableIterator
: boost::CopyConstructible<Iterator>
{
BOOST_CONCEPT_USAGE(WritableIterator)
{
*i = v;
}
private:
ValueType v;
Iterator i;
};
template <
typename Iterator
, typename ValueType = BOOST_DEDUCED_TYPENAME std::iterator_traits<Iterator>::value_type
>
struct WritableIteratorConcept : WritableIterator<Iterator,ValueType> {};
BOOST_concept(SwappableIterator,(Iterator))
{
BOOST_CONCEPT_USAGE(SwappableIterator)
{
std::iter_swap(i1, i2);
}
private:
Iterator i1;
Iterator i2;
};
BOOST_concept(LvalueIterator,(Iterator))
{
typedef typename std::iterator_traits<Iterator>::value_type value_type;
BOOST_CONCEPT_USAGE(LvalueIterator)
{
value_type& r = const_cast<value_type&>(*i);
boost::ignore_unused_variable_warning(r);
}
private:
Iterator i;
};
//===========================================================================
// Iterator Traversal Concepts
BOOST_concept(IncrementableIterator,(Iterator))
: boost::Assignable<Iterator>
, boost::CopyConstructible<Iterator>
{
typedef typename boost::iterator_traversal<Iterator>::type traversal_category;
BOOST_CONCEPT_ASSERT((
boost::Convertible<
traversal_category
, boost::incrementable_traversal_tag
>));
BOOST_CONCEPT_USAGE(IncrementableIterator)
{
++i;
(void)i++;
}
private:
Iterator i;
};
BOOST_concept(SinglePassIterator,(Iterator))
: IncrementableIterator<Iterator>
, boost::EqualityComparable<Iterator>
{
BOOST_CONCEPT_ASSERT((
boost::Convertible<
BOOST_DEDUCED_TYPENAME SinglePassIterator::traversal_category
, boost::single_pass_traversal_tag
> ));
};
BOOST_concept(ForwardTraversal,(Iterator))
: SinglePassIterator<Iterator>
, boost::DefaultConstructible<Iterator>
{
typedef typename std::iterator_traits<Iterator>::difference_type difference_type;
BOOST_MPL_ASSERT((boost::is_integral<difference_type>));
BOOST_MPL_ASSERT_RELATION(std::numeric_limits<difference_type>::is_signed, ==, true);
BOOST_CONCEPT_ASSERT((
boost::Convertible<
BOOST_DEDUCED_TYPENAME ForwardTraversal::traversal_category
, boost::forward_traversal_tag
> ));
};
BOOST_concept(BidirectionalTraversal,(Iterator))
: ForwardTraversal<Iterator>
{
BOOST_CONCEPT_ASSERT((
boost::Convertible<
BOOST_DEDUCED_TYPENAME BidirectionalTraversal::traversal_category
, boost::bidirectional_traversal_tag
> ));
BOOST_CONCEPT_USAGE(BidirectionalTraversal)
{
--i;
(void)i--;
}
private:
Iterator i;
};
BOOST_concept(RandomAccessTraversal,(Iterator))
: BidirectionalTraversal<Iterator>
{
BOOST_CONCEPT_ASSERT((
boost::Convertible<
BOOST_DEDUCED_TYPENAME RandomAccessTraversal::traversal_category
, boost::random_access_traversal_tag
> ));
BOOST_CONCEPT_USAGE(RandomAccessTraversal)
{
i += n;
i = i + n;
i = n + i;
i -= n;
i = i - n;
n = i - j;
}
private:
typename BidirectionalTraversal<Iterator>::difference_type n;
Iterator i, j;
};
//===========================================================================
// Iterator Interoperability
namespace detail
{
template <typename Iterator1, typename Iterator2>
void interop_single_pass_constraints(Iterator1 const& i1, Iterator2 const& i2)
{
bool b;
b = i1 == i2;
b = i1 != i2;
b = i2 == i1;
b = i2 != i1;
boost::ignore_unused_variable_warning(b);
}
template <typename Iterator1, typename Iterator2>
void interop_rand_access_constraints(
Iterator1 const& i1, Iterator2 const& i2,
boost::random_access_traversal_tag, boost::random_access_traversal_tag)
{
bool b;
typename std::iterator_traits<Iterator2>::difference_type n;
b = i1 < i2;
b = i1 <= i2;
b = i1 > i2;
b = i1 >= i2;
n = i1 - i2;
b = i2 < i1;
b = i2 <= i1;
b = i2 > i1;
b = i2 >= i1;
n = i2 - i1;
boost::ignore_unused_variable_warning(b);
boost::ignore_unused_variable_warning(n);
}
template <typename Iterator1, typename Iterator2>
void interop_rand_access_constraints(
Iterator1 const&, Iterator2 const&,
boost::single_pass_traversal_tag, boost::single_pass_traversal_tag)
{ }
} // namespace detail
BOOST_concept(InteroperableIterator,(Iterator)(ConstIterator))
{
private:
typedef typename boost::iterators::pure_iterator_traversal<Iterator>::type traversal_category;
typedef typename boost::iterators::pure_iterator_traversal<ConstIterator>::type const_traversal_category;
public:
BOOST_CONCEPT_ASSERT((SinglePassIterator<Iterator>));
BOOST_CONCEPT_ASSERT((SinglePassIterator<ConstIterator>));
BOOST_CONCEPT_USAGE(InteroperableIterator)
{
detail::interop_single_pass_constraints(i, ci);
detail::interop_rand_access_constraints(i, ci, traversal_category(), const_traversal_category());
ci = i;
}
private:
Iterator i;
ConstIterator ci;
};
} // namespace boost_concepts
#include <boost/concept/detail/concept_undef.hpp>
#endif // BOOST_ITERATOR_CONCEPTS_HPP

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// (C) Copyright David Abrahams 2002.
// (C) Copyright Jeremy Siek 2002.
// (C) Copyright Thomas Witt 2002.
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_ITERATOR_FACADE_23022003THW_HPP
#define BOOST_ITERATOR_FACADE_23022003THW_HPP
#include <boost/config.hpp>
#include <boost/iterator/interoperable.hpp>
#include <boost/iterator/iterator_traits.hpp>
#include <boost/iterator/iterator_categories.hpp>
#include <boost/iterator/detail/facade_iterator_category.hpp>
#include <boost/iterator/detail/enable_if.hpp>
#include <boost/static_assert.hpp>
#include <boost/core/addressof.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/type_traits/add_const.hpp>
#include <boost/type_traits/add_pointer.hpp>
#include <boost/type_traits/add_lvalue_reference.hpp>
#include <boost/type_traits/remove_const.hpp>
#include <boost/type_traits/remove_reference.hpp>
#include <boost/type_traits/is_convertible.hpp>
#include <boost/type_traits/is_pod.hpp>
#include <boost/mpl/eval_if.hpp>
#include <boost/mpl/if.hpp>
#include <boost/mpl/or.hpp>
#include <boost/mpl/and.hpp>
#include <boost/mpl/not.hpp>
#include <boost/mpl/always.hpp>
#include <boost/mpl/apply.hpp>
#include <boost/mpl/identity.hpp>
#include <cstddef>
#include <boost/iterator/detail/config_def.hpp> // this goes last
namespace boost {
namespace iterators {
// This forward declaration is required for the friend declaration
// in iterator_core_access
template <class I, class V, class TC, class R, class D> class iterator_facade;
namespace detail
{
// A binary metafunction class that always returns bool. VC6
// ICEs on mpl::always<bool>, probably because of the default
// parameters.
struct always_bool2
{
template <class T, class U>
struct apply
{
typedef bool type;
};
};
// The type trait checks if the category or traversal is at least as advanced as the specified required traversal
template< typename CategoryOrTraversal, typename Required >
struct is_traversal_at_least :
public boost::is_convertible< typename iterator_category_to_traversal< CategoryOrTraversal >::type, Required >
{};
//
// enable if for use in operator implementation.
//
template <
class Facade1
, class Facade2
, class Return
>
struct enable_if_interoperable :
public boost::iterators::enable_if<
is_interoperable< Facade1, Facade2 >
, Return
>
{};
//
// enable if for use in implementation of operators specific for random access traversal.
//
template <
class Facade1
, class Facade2
, class Return
>
struct enable_if_interoperable_and_random_access_traversal :
public boost::iterators::enable_if<
mpl::and_<
is_interoperable< Facade1, Facade2 >
, is_traversal_at_least< typename iterator_category< Facade1 >::type, random_access_traversal_tag >
, is_traversal_at_least< typename iterator_category< Facade2 >::type, random_access_traversal_tag >
>
, Return
>
{};
//
// Generates associated types for an iterator_facade with the
// given parameters.
//
template <
class ValueParam
, class CategoryOrTraversal
, class Reference
, class Difference
>
struct iterator_facade_types
{
typedef typename facade_iterator_category<
CategoryOrTraversal, ValueParam, Reference
>::type iterator_category;
typedef typename remove_const<ValueParam>::type value_type;
// Not the real associated pointer type
typedef typename mpl::eval_if<
boost::iterators::detail::iterator_writability_disabled<ValueParam,Reference>
, add_pointer<const value_type>
, add_pointer<value_type>
>::type pointer;
# if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) \
&& (BOOST_WORKAROUND(_STLPORT_VERSION, BOOST_TESTED_AT(0x452)) \
|| BOOST_WORKAROUND(BOOST_DINKUMWARE_STDLIB, BOOST_TESTED_AT(310))) \
|| BOOST_WORKAROUND(BOOST_RWSTD_VER, BOOST_TESTED_AT(0x20101)) \
|| BOOST_WORKAROUND(BOOST_DINKUMWARE_STDLIB, <= 310)
// To interoperate with some broken library/compiler
// combinations, user-defined iterators must be derived from
// std::iterator. It is possible to implement a standard
// library for broken compilers without this limitation.
# define BOOST_ITERATOR_FACADE_NEEDS_ITERATOR_BASE 1
typedef
iterator<iterator_category, value_type, Difference, pointer, Reference>
base;
# endif
};
// iterators whose dereference operators reference the same value
// for all iterators into the same sequence (like many input
// iterators) need help with their postfix ++: the referenced
// value must be read and stored away before the increment occurs
// so that *a++ yields the originally referenced element and not
// the next one.
template <class Iterator>
class postfix_increment_proxy
{
typedef typename iterator_value<Iterator>::type value_type;
public:
explicit postfix_increment_proxy(Iterator const& x)
: stored_value(*x)
{}
// Returning a mutable reference allows nonsense like
// (*r++).mutate(), but it imposes fewer assumptions about the
// behavior of the value_type. In particular, recall that
// (*r).mutate() is legal if operator* returns by value.
value_type&
operator*() const
{
return this->stored_value;
}
private:
mutable value_type stored_value;
};
//
// In general, we can't determine that such an iterator isn't
// writable -- we also need to store a copy of the old iterator so
// that it can be written into.
template <class Iterator>
class writable_postfix_increment_proxy
{
typedef typename iterator_value<Iterator>::type value_type;
public:
explicit writable_postfix_increment_proxy(Iterator const& x)
: stored_value(*x)
, stored_iterator(x)
{}
// Dereferencing must return a proxy so that both *r++ = o and
// value_type(*r++) can work. In this case, *r is the same as
// *r++, and the conversion operator below is used to ensure
// readability.
writable_postfix_increment_proxy const&
operator*() const
{
return *this;
}
// Provides readability of *r++
operator value_type&() const
{
return stored_value;
}
// Provides writability of *r++
template <class T>
T const& operator=(T const& x) const
{
*this->stored_iterator = x;
return x;
}
// This overload just in case only non-const objects are writable
template <class T>
T& operator=(T& x) const
{
*this->stored_iterator = x;
return x;
}
// Provides X(r++)
operator Iterator const&() const
{
return stored_iterator;
}
private:
mutable value_type stored_value;
Iterator stored_iterator;
};
# ifdef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
template <class Reference, class Value>
struct is_non_proxy_reference_impl
{
static Reference r;
template <class R>
static typename mpl::if_<
is_convertible<
R const volatile*
, Value const volatile*
>
, char[1]
, char[2]
>::type& helper(R const&);
BOOST_STATIC_CONSTANT(bool, value = sizeof(helper(r)) == 1);
};
template <class Reference, class Value>
struct is_non_proxy_reference
: mpl::bool_<
is_non_proxy_reference_impl<Reference, Value>::value
>
{};
# else
template <class Reference, class Value>
struct is_non_proxy_reference
: is_convertible<
typename remove_reference<Reference>::type
const volatile*
, Value const volatile*
>
{};
# endif
// A metafunction to choose the result type of postfix ++
//
// Because the C++98 input iterator requirements say that *r++ has
// type T (value_type), implementations of some standard
// algorithms like lexicographical_compare may use constructions
// like:
//
// *r++ < *s++
//
// If *r++ returns a proxy (as required if r is writable but not
// multipass), this sort of expression will fail unless the proxy
// supports the operator<. Since there are any number of such
// operations, we're not going to try to support them. Therefore,
// even if r++ returns a proxy, *r++ will only return a proxy if
// *r also returns a proxy.
template <class Iterator, class Value, class Reference, class CategoryOrTraversal>
struct postfix_increment_result
: mpl::eval_if<
mpl::and_<
// A proxy is only needed for readable iterators
is_convertible<
Reference
// Use add_lvalue_reference to form `reference to Value` due to
// some (strict) C++03 compilers (e.g. `gcc -std=c++03`) reject
// 'reference-to-reference' in the template which described in CWG
// DR106.
// http://www.open-std.org/Jtc1/sc22/wg21/docs/cwg_defects.html#106
, typename add_lvalue_reference<Value const>::type
>
// No multipass iterator can have values that disappear
// before positions can be re-visited
, mpl::not_<
is_convertible<
typename iterator_category_to_traversal<CategoryOrTraversal>::type
, forward_traversal_tag
>
>
>
, mpl::if_<
is_non_proxy_reference<Reference,Value>
, postfix_increment_proxy<Iterator>
, writable_postfix_increment_proxy<Iterator>
>
, mpl::identity<Iterator>
>
{};
// operator->() needs special support for input iterators to strictly meet the
// standard's requirements. If *i is not a reference type, we must still
// produce an lvalue to which a pointer can be formed. We do that by
// returning a proxy object containing an instance of the reference object.
template <class Reference, class Pointer>
struct operator_arrow_dispatch // proxy references
{
struct proxy
{
explicit proxy(Reference const & x) : m_ref(x) {}
Reference* operator->() { return boost::addressof(m_ref); }
// This function is needed for MWCW and BCC, which won't call
// operator-> again automatically per 13.3.1.2 para 8
operator Reference*() { return boost::addressof(m_ref); }
Reference m_ref;
};
typedef proxy result_type;
static result_type apply(Reference const & x)
{
return result_type(x);
}
};
template <class T, class Pointer>
struct operator_arrow_dispatch<T&, Pointer> // "real" references
{
typedef Pointer result_type;
static result_type apply(T& x)
{
return boost::addressof(x);
}
};
// A proxy return type for operator[], needed to deal with
// iterators that may invalidate referents upon destruction.
// Consider the temporary iterator in *(a + n)
template <class Iterator>
class operator_brackets_proxy
{
// Iterator is actually an iterator_facade, so we do not have to
// go through iterator_traits to access the traits.
typedef typename Iterator::reference reference;
typedef typename Iterator::value_type value_type;
public:
operator_brackets_proxy(Iterator const& iter)
: m_iter(iter)
{}
operator reference() const
{
return *m_iter;
}
operator_brackets_proxy& operator=(value_type const& val)
{
*m_iter = val;
return *this;
}
private:
Iterator m_iter;
};
// A metafunction that determines whether operator[] must return a
// proxy, or whether it can simply return a copy of the value_type.
template <class ValueType, class Reference>
struct use_operator_brackets_proxy
: mpl::not_<
mpl::and_<
// Really we want an is_copy_constructible trait here,
// but is_POD will have to suffice in the meantime.
boost::is_POD<ValueType>
, iterator_writability_disabled<ValueType,Reference>
>
>
{};
template <class Iterator, class Value, class Reference>
struct operator_brackets_result
{
typedef typename mpl::if_<
use_operator_brackets_proxy<Value,Reference>
, operator_brackets_proxy<Iterator>
, Value
>::type type;
};
template <class Iterator>
operator_brackets_proxy<Iterator> make_operator_brackets_result(Iterator const& iter, mpl::true_)
{
return operator_brackets_proxy<Iterator>(iter);
}
template <class Iterator>
typename Iterator::value_type make_operator_brackets_result(Iterator const& iter, mpl::false_)
{
return *iter;
}
struct choose_difference_type
{
template <class I1, class I2>
struct apply
:
# ifdef BOOST_NO_ONE_WAY_ITERATOR_INTEROP
iterator_difference<I1>
# else
mpl::eval_if<
is_convertible<I2,I1>
, iterator_difference<I1>
, iterator_difference<I2>
>
# endif
{};
};
template <
class Derived
, class Value
, class CategoryOrTraversal
, class Reference
, class Difference
, bool IsBidirectionalTraversal
, bool IsRandomAccessTraversal
>
class iterator_facade_base;
} // namespace detail
// Macros which describe the declarations of binary operators
# ifdef BOOST_NO_STRICT_ITERATOR_INTEROPERABILITY
# define BOOST_ITERATOR_FACADE_INTEROP_HEAD_IMPL(prefix, op, result_type, enabler) \
template < \
class Derived1, class V1, class TC1, class Reference1, class Difference1 \
, class Derived2, class V2, class TC2, class Reference2, class Difference2 \
> \
prefix typename mpl::apply2<result_type,Derived1,Derived2>::type \
operator op( \
iterator_facade<Derived1, V1, TC1, Reference1, Difference1> const& lhs \
, iterator_facade<Derived2, V2, TC2, Reference2, Difference2> const& rhs)
# else
# define BOOST_ITERATOR_FACADE_INTEROP_HEAD_IMPL(prefix, op, result_type, enabler) \
template < \
class Derived1, class V1, class TC1, class Reference1, class Difference1 \
, class Derived2, class V2, class TC2, class Reference2, class Difference2 \
> \
prefix typename enabler< \
Derived1, Derived2 \
, typename mpl::apply2<result_type,Derived1,Derived2>::type \
>::type \
operator op( \
iterator_facade<Derived1, V1, TC1, Reference1, Difference1> const& lhs \
, iterator_facade<Derived2, V2, TC2, Reference2, Difference2> const& rhs)
# endif
# define BOOST_ITERATOR_FACADE_INTEROP_HEAD(prefix, op, result_type) \
BOOST_ITERATOR_FACADE_INTEROP_HEAD_IMPL(prefix, op, result_type, boost::iterators::detail::enable_if_interoperable)
# define BOOST_ITERATOR_FACADE_INTEROP_RANDOM_ACCESS_HEAD(prefix, op, result_type) \
BOOST_ITERATOR_FACADE_INTEROP_HEAD_IMPL(prefix, op, result_type, boost::iterators::detail::enable_if_interoperable_and_random_access_traversal)
# define BOOST_ITERATOR_FACADE_PLUS_HEAD(prefix,args) \
template <class Derived, class V, class TC, class R, class D> \
prefix typename boost::iterators::enable_if< \
boost::iterators::detail::is_traversal_at_least< TC, boost::iterators::random_access_traversal_tag >, \
Derived \
>::type operator+ args
//
// Helper class for granting access to the iterator core interface.
//
// The simple core interface is used by iterator_facade. The core
// interface of a user/library defined iterator type should not be made public
// so that it does not clutter the public interface. Instead iterator_core_access
// should be made friend so that iterator_facade can access the core
// interface through iterator_core_access.
//
class iterator_core_access
{
# if defined(BOOST_NO_MEMBER_TEMPLATE_FRIENDS)
// Tasteless as this may seem, making all members public allows member templates
// to work in the absence of member template friends.
public:
# else
template <class I, class V, class TC, class R, class D> friend class iterator_facade;
template <class I, class V, class TC, class R, class D, bool IsBidirectionalTraversal, bool IsRandomAccessTraversal>
friend class detail::iterator_facade_base;
# define BOOST_ITERATOR_FACADE_RELATION(op) \
BOOST_ITERATOR_FACADE_INTEROP_HEAD(friend,op, boost::iterators::detail::always_bool2);
BOOST_ITERATOR_FACADE_RELATION(==)
BOOST_ITERATOR_FACADE_RELATION(!=)
# undef BOOST_ITERATOR_FACADE_RELATION
# define BOOST_ITERATOR_FACADE_RANDOM_ACCESS_RELATION(op) \
BOOST_ITERATOR_FACADE_INTEROP_RANDOM_ACCESS_HEAD(friend,op, boost::iterators::detail::always_bool2);
BOOST_ITERATOR_FACADE_RANDOM_ACCESS_RELATION(<)
BOOST_ITERATOR_FACADE_RANDOM_ACCESS_RELATION(>)
BOOST_ITERATOR_FACADE_RANDOM_ACCESS_RELATION(<=)
BOOST_ITERATOR_FACADE_RANDOM_ACCESS_RELATION(>=)
# undef BOOST_ITERATOR_FACADE_RANDOM_ACCESS_RELATION
BOOST_ITERATOR_FACADE_INTEROP_RANDOM_ACCESS_HEAD(
friend, -, boost::iterators::detail::choose_difference_type)
;
BOOST_ITERATOR_FACADE_PLUS_HEAD(
friend inline
, (iterator_facade<Derived, V, TC, R, D> const&
, typename Derived::difference_type)
)
;
BOOST_ITERATOR_FACADE_PLUS_HEAD(
friend inline
, (typename Derived::difference_type
, iterator_facade<Derived, V, TC, R, D> const&)
)
;
# endif
template <class Facade>
static typename Facade::reference dereference(Facade const& f)
{
return f.dereference();
}
template <class Facade>
static void increment(Facade& f)
{
f.increment();
}
template <class Facade>
static void decrement(Facade& f)
{
f.decrement();
}
template <class Facade1, class Facade2>
static bool equal(Facade1 const& f1, Facade2 const& f2, mpl::true_)
{
return f1.equal(f2);
}
template <class Facade1, class Facade2>
static bool equal(Facade1 const& f1, Facade2 const& f2, mpl::false_)
{
return f2.equal(f1);
}
template <class Facade>
static void advance(Facade& f, typename Facade::difference_type n)
{
f.advance(n);
}
template <class Facade1, class Facade2>
static typename Facade1::difference_type distance_from(
Facade1 const& f1, Facade2 const& f2, mpl::true_)
{
return -f1.distance_to(f2);
}
template <class Facade1, class Facade2>
static typename Facade2::difference_type distance_from(
Facade1 const& f1, Facade2 const& f2, mpl::false_)
{
return f2.distance_to(f1);
}
//
// Curiously Recurring Template interface.
//
template <class I, class V, class TC, class R, class D>
static I& derived(iterator_facade<I,V,TC,R,D>& facade)
{
return *static_cast<I*>(&facade);
}
template <class I, class V, class TC, class R, class D>
static I const& derived(iterator_facade<I,V,TC,R,D> const& facade)
{
return *static_cast<I const*>(&facade);
}
// objects of this class are useless
BOOST_DELETED_FUNCTION(iterator_core_access())
};
namespace detail {
// Implementation for forward traversal iterators
template <
class Derived
, class Value
, class CategoryOrTraversal
, class Reference
, class Difference
>
class iterator_facade_base< Derived, Value, CategoryOrTraversal, Reference, Difference, false, false >
# ifdef BOOST_ITERATOR_FACADE_NEEDS_ITERATOR_BASE
: public boost::iterators::detail::iterator_facade_types<
Value, CategoryOrTraversal, Reference, Difference
>::base
# undef BOOST_ITERATOR_FACADE_NEEDS_ITERATOR_BASE
# endif
{
private:
typedef boost::iterators::detail::iterator_facade_types<
Value, CategoryOrTraversal, Reference, Difference
> associated_types;
typedef boost::iterators::detail::operator_arrow_dispatch<
Reference
, typename associated_types::pointer
> operator_arrow_dispatch_;
public:
typedef typename associated_types::value_type value_type;
typedef Reference reference;
typedef Difference difference_type;
typedef typename operator_arrow_dispatch_::result_type pointer;
typedef typename associated_types::iterator_category iterator_category;
public:
reference operator*() const
{
return iterator_core_access::dereference(this->derived());
}
pointer operator->() const
{
return operator_arrow_dispatch_::apply(*this->derived());
}
Derived& operator++()
{
iterator_core_access::increment(this->derived());
return this->derived();
}
protected:
//
// Curiously Recurring Template interface.
//
Derived& derived()
{
return *static_cast<Derived*>(this);
}
Derived const& derived() const
{
return *static_cast<Derived const*>(this);
}
};
// Implementation for bidirectional traversal iterators
template <
class Derived
, class Value
, class CategoryOrTraversal
, class Reference
, class Difference
>
class iterator_facade_base< Derived, Value, CategoryOrTraversal, Reference, Difference, true, false > :
public iterator_facade_base< Derived, Value, CategoryOrTraversal, Reference, Difference, false, false >
{
public:
Derived& operator--()
{
iterator_core_access::decrement(this->derived());
return this->derived();
}
Derived operator--(int)
{
Derived tmp(this->derived());
--*this;
return tmp;
}
};
// Implementation for random access traversal iterators
template <
class Derived
, class Value
, class CategoryOrTraversal
, class Reference
, class Difference
>
class iterator_facade_base< Derived, Value, CategoryOrTraversal, Reference, Difference, true, true > :
public iterator_facade_base< Derived, Value, CategoryOrTraversal, Reference, Difference, true, false >
{
private:
typedef iterator_facade_base< Derived, Value, CategoryOrTraversal, Reference, Difference, true, false > base_type;
public:
typedef typename base_type::reference reference;
typedef typename base_type::difference_type difference_type;
public:
typename boost::iterators::detail::operator_brackets_result<Derived, Value, reference>::type
operator[](difference_type n) const
{
typedef boost::iterators::detail::use_operator_brackets_proxy<Value, Reference> use_proxy;
return boost::iterators::detail::make_operator_brackets_result<Derived>(
this->derived() + n
, use_proxy()
);
}
Derived& operator+=(difference_type n)
{
iterator_core_access::advance(this->derived(), n);
return this->derived();
}
Derived& operator-=(difference_type n)
{
iterator_core_access::advance(this->derived(), -n);
return this->derived();
}
Derived operator-(difference_type x) const
{
Derived result(this->derived());
return result -= x;
}
};
} // namespace detail
//
// iterator_facade - use as a public base class for defining new
// standard-conforming iterators.
//
template <
class Derived // The derived iterator type being constructed
, class Value
, class CategoryOrTraversal
, class Reference = Value&
, class Difference = std::ptrdiff_t
>
class iterator_facade :
public detail::iterator_facade_base<
Derived,
Value,
CategoryOrTraversal,
Reference,
Difference,
detail::is_traversal_at_least< CategoryOrTraversal, bidirectional_traversal_tag >::value,
detail::is_traversal_at_least< CategoryOrTraversal, random_access_traversal_tag >::value
>
{
protected:
// For use by derived classes
typedef iterator_facade<Derived,Value,CategoryOrTraversal,Reference,Difference> iterator_facade_;
};
template <class I, class V, class TC, class R, class D>
inline typename boost::iterators::detail::postfix_increment_result<I,V,R,TC>::type
operator++(
iterator_facade<I,V,TC,R,D>& i
, int
)
{
typename boost::iterators::detail::postfix_increment_result<I,V,R,TC>::type
tmp(*static_cast<I*>(&i));
++i;
return tmp;
}
//
// Comparison operator implementation. The library supplied operators
// enables the user to provide fully interoperable constant/mutable
// iterator types. I.e. the library provides all operators
// for all mutable/constant iterator combinations.
//
// Note though that this kind of interoperability for constant/mutable
// iterators is not required by the standard for container iterators.
// All the standard asks for is a conversion mutable -> constant.
// Most standard library implementations nowadays provide fully interoperable
// iterator implementations, but there are still heavily used implementations
// that do not provide them. (Actually it's even worse, they do not provide
// them for only a few iterators.)
//
// ?? Maybe a BOOST_ITERATOR_NO_FULL_INTEROPERABILITY macro should
// enable the user to turn off mixed type operators
//
// The library takes care to provide only the right operator overloads.
// I.e.
//
// bool operator==(Iterator, Iterator);
// bool operator==(ConstIterator, Iterator);
// bool operator==(Iterator, ConstIterator);
// bool operator==(ConstIterator, ConstIterator);
//
// ...
//
// In order to do so it uses c++ idioms that are not yet widely supported
// by current compiler releases. The library is designed to degrade gracefully
// in the face of compiler deficiencies. In general compiler
// deficiencies result in less strict error checking and more obscure
// error messages, functionality is not affected.
//
// For full operation compiler support for "Substitution Failure Is Not An Error"
// (aka. enable_if) and boost::is_convertible is required.
//
// The following problems occur if support is lacking.
//
// Pseudo code
//
// ---------------
// AdaptorA<Iterator1> a1;
// AdaptorA<Iterator2> a2;
//
// // This will result in a no such overload error in full operation
// // If enable_if or is_convertible is not supported
// // The instantiation will fail with an error hopefully indicating that
// // there is no operator== for Iterator1, Iterator2
// // The same will happen if no enable_if is used to remove
// // false overloads from the templated conversion constructor
// // of AdaptorA.
//
// a1 == a2;
// ----------------
//
// AdaptorA<Iterator> a;
// AdaptorB<Iterator> b;
//
// // This will result in a no such overload error in full operation
// // If enable_if is not supported the static assert used
// // in the operator implementation will fail.
// // This will accidently work if is_convertible is not supported.
//
// a == b;
// ----------------
//
# ifdef BOOST_NO_ONE_WAY_ITERATOR_INTEROP
# define BOOST_ITERATOR_CONVERTIBLE(a,b) mpl::true_()
# else
# define BOOST_ITERATOR_CONVERTIBLE(a,b) is_convertible<a,b>()
# endif
# define BOOST_ITERATOR_FACADE_INTEROP(op, result_type, return_prefix, base_op) \
BOOST_ITERATOR_FACADE_INTEROP_HEAD(inline, op, result_type) \
{ \
/* For those compilers that do not support enable_if */ \
BOOST_STATIC_ASSERT(( \
is_interoperable< Derived1, Derived2 >::value \
)); \
return_prefix iterator_core_access::base_op( \
*static_cast<Derived1 const*>(&lhs) \
, *static_cast<Derived2 const*>(&rhs) \
, BOOST_ITERATOR_CONVERTIBLE(Derived2,Derived1) \
); \
}
# define BOOST_ITERATOR_FACADE_RELATION(op, return_prefix, base_op) \
BOOST_ITERATOR_FACADE_INTEROP( \
op \
, boost::iterators::detail::always_bool2 \
, return_prefix \
, base_op \
)
BOOST_ITERATOR_FACADE_RELATION(==, return, equal)
BOOST_ITERATOR_FACADE_RELATION(!=, return !, equal)
# undef BOOST_ITERATOR_FACADE_RELATION
# define BOOST_ITERATOR_FACADE_INTEROP_RANDOM_ACCESS(op, result_type, return_prefix, base_op) \
BOOST_ITERATOR_FACADE_INTEROP_RANDOM_ACCESS_HEAD(inline, op, result_type) \
{ \
/* For those compilers that do not support enable_if */ \
BOOST_STATIC_ASSERT(( \
is_interoperable< Derived1, Derived2 >::value && \
boost::iterators::detail::is_traversal_at_least< typename iterator_category< Derived1 >::type, random_access_traversal_tag >::value && \
boost::iterators::detail::is_traversal_at_least< typename iterator_category< Derived2 >::type, random_access_traversal_tag >::value \
)); \
return_prefix iterator_core_access::base_op( \
*static_cast<Derived1 const*>(&lhs) \
, *static_cast<Derived2 const*>(&rhs) \
, BOOST_ITERATOR_CONVERTIBLE(Derived2,Derived1) \
); \
}
# define BOOST_ITERATOR_FACADE_RANDOM_ACCESS_RELATION(op, return_prefix, base_op) \
BOOST_ITERATOR_FACADE_INTEROP_RANDOM_ACCESS( \
op \
, boost::iterators::detail::always_bool2 \
, return_prefix \
, base_op \
)
BOOST_ITERATOR_FACADE_RANDOM_ACCESS_RELATION(<, return 0 >, distance_from)
BOOST_ITERATOR_FACADE_RANDOM_ACCESS_RELATION(>, return 0 <, distance_from)
BOOST_ITERATOR_FACADE_RANDOM_ACCESS_RELATION(<=, return 0 >=, distance_from)
BOOST_ITERATOR_FACADE_RANDOM_ACCESS_RELATION(>=, return 0 <=, distance_from)
# undef BOOST_ITERATOR_FACADE_RANDOM_ACCESS_RELATION
// operator- requires an additional part in the static assertion
BOOST_ITERATOR_FACADE_INTEROP_RANDOM_ACCESS(
-
, boost::iterators::detail::choose_difference_type
, return
, distance_from
)
# undef BOOST_ITERATOR_FACADE_INTEROP
# undef BOOST_ITERATOR_FACADE_INTEROP_RANDOM_ACCESS
# define BOOST_ITERATOR_FACADE_PLUS(args) \
BOOST_ITERATOR_FACADE_PLUS_HEAD(inline, args) \
{ \
Derived tmp(static_cast<Derived const&>(i)); \
return tmp += n; \
}
BOOST_ITERATOR_FACADE_PLUS((
iterator_facade<Derived, V, TC, R, D> const& i
, typename Derived::difference_type n
))
BOOST_ITERATOR_FACADE_PLUS((
typename Derived::difference_type n
, iterator_facade<Derived, V, TC, R, D> const& i
))
# undef BOOST_ITERATOR_FACADE_PLUS
# undef BOOST_ITERATOR_FACADE_PLUS_HEAD
# undef BOOST_ITERATOR_FACADE_INTEROP_HEAD
# undef BOOST_ITERATOR_FACADE_INTEROP_RANDOM_ACCESS_HEAD
# undef BOOST_ITERATOR_FACADE_INTEROP_HEAD_IMPL
} // namespace iterators
using iterators::iterator_core_access;
using iterators::iterator_facade;
} // namespace boost
#include <boost/iterator/detail/config_undef.hpp>
#endif // BOOST_ITERATOR_FACADE_23022003THW_HPP

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// Copyright David Abrahams 2003.
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef ITERATOR_TRAITS_DWA200347_HPP
# define ITERATOR_TRAITS_DWA200347_HPP
# include <boost/detail/workaround.hpp>
#include <iterator>
namespace boost {
namespace iterators {
// Macro for supporting old compilers, no longer needed but kept
// for backwards compatibility (it was documented).
#define BOOST_ITERATOR_CATEGORY iterator_category
template <class Iterator>
struct iterator_value
{
typedef typename std::iterator_traits<Iterator>::value_type type;
};
template <class Iterator>
struct iterator_reference
{
typedef typename std::iterator_traits<Iterator>::reference type;
};
template <class Iterator>
struct iterator_pointer
{
typedef typename std::iterator_traits<Iterator>::pointer type;
};
template <class Iterator>
struct iterator_difference
{
typedef typename std::iterator_traits<Iterator>::difference_type type;
};
template <class Iterator>
struct iterator_category
{
typedef typename std::iterator_traits<Iterator>::iterator_category type;
};
} // namespace iterators
using iterators::iterator_value;
using iterators::iterator_reference;
using iterators::iterator_pointer;
using iterators::iterator_difference;
using iterators::iterator_category;
} // namespace boost
#endif // ITERATOR_TRAITS_DWA200347_HPP

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// Copyright David Abrahams 2003. 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)
#ifndef BOOST_ITERATOR_MINIMUM_CATEGORY_HPP_INCLUDED_
# define BOOST_ITERATOR_MINIMUM_CATEGORY_HPP_INCLUDED_
# include <boost/static_assert.hpp>
# include <boost/type_traits/is_convertible.hpp>
# include <boost/type_traits/is_same.hpp>
# include <boost/mpl/placeholders.hpp>
# include <boost/mpl/aux_/lambda_support.hpp>
namespace boost {
namespace iterators {
namespace detail {
template <bool GreaterEqual, bool LessEqual>
struct minimum_category_impl;
template <class T1, class T2>
struct error_not_related_by_convertibility;
template <>
struct minimum_category_impl<true,false>
{
template <class T1, class T2> struct apply
{
typedef T2 type;
};
};
template <>
struct minimum_category_impl<false,true>
{
template <class T1, class T2> struct apply
{
typedef T1 type;
};
};
template <>
struct minimum_category_impl<true,true>
{
template <class T1, class T2> struct apply
{
BOOST_STATIC_ASSERT((is_same<T1,T2>::value));
typedef T1 type;
};
};
template <>
struct minimum_category_impl<false,false>
{
template <class T1, class T2> struct apply
: error_not_related_by_convertibility<T1,T2>
{
};
};
} // namespace detail
//
// Returns the minimum category type or fails to compile
// if T1 and T2 are unrelated.
//
template <class T1 = mpl::_1, class T2 = mpl::_2>
struct minimum_category
{
typedef boost::iterators::detail::minimum_category_impl<
::boost::is_convertible<T1,T2>::value
, ::boost::is_convertible<T2,T1>::value
> outer;
typedef typename outer::template apply<T1,T2> inner;
typedef typename inner::type type;
BOOST_MPL_AUX_LAMBDA_SUPPORT(2,minimum_category,(T1,T2))
};
template <>
struct minimum_category<mpl::_1,mpl::_2>
{
template <class T1, class T2>
struct apply : minimum_category<T1,T2>
{};
BOOST_MPL_AUX_LAMBDA_SUPPORT_SPEC(2,minimum_category,(mpl::_1,mpl::_2))
};
} // namespace iterators
} // namespace boost
#endif // BOOST_ITERATOR_MINIMUM_CATEGORY_HPP_INCLUDED_

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@@ -0,0 +1,265 @@
#ifndef BOOST_NEW_ITERATOR_TESTS_HPP
# define BOOST_NEW_ITERATOR_TESTS_HPP
//
// Copyright (c) David Abrahams 2001.
// Copyright (c) Jeremy Siek 2001-2003.
// Copyright (c) Thomas Witt 2002.
//
// 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)
//
// This is meant to be the beginnings of a comprehensive, generic
// test suite for STL concepts such as iterators and containers.
//
// Revision History:
// 28 Oct 2002 Started update for new iterator categories
// (Jeremy Siek)
// 28 Apr 2002 Fixed input iterator requirements.
// For a == b a++ == b++ is no longer required.
// See 24.1.1/3 for details.
// (Thomas Witt)
// 08 Feb 2001 Fixed bidirectional iterator test so that
// --i is no longer a precondition.
// (Jeremy Siek)
// 04 Feb 2001 Added lvalue test, corrected preconditions
// (David Abrahams)
# include <iterator>
# include <boost/static_assert.hpp>
# include <boost/concept_archetype.hpp> // for detail::dummy_constructor
# include <boost/pending/iterator_tests.hpp>
# include <boost/iterator/is_readable_iterator.hpp>
# include <boost/iterator/is_lvalue_iterator.hpp>
# include <boost/type_traits/is_same.hpp>
# include <boost/mpl/bool.hpp>
# include <boost/mpl/and.hpp>
# include <boost/iterator/detail/config_def.hpp>
# include <boost/detail/is_incrementable.hpp>
# include <boost/core/lightweight_test.hpp>
namespace boost {
// Do separate tests for *i++ so we can treat, e.g., smart pointers,
// as readable and/or writable iterators.
template <class Iterator, class T>
void readable_iterator_traversal_test(Iterator i1, T v, mpl::true_)
{
T v2(*i1++);
BOOST_TEST(v == v2);
}
template <class Iterator, class T>
void readable_iterator_traversal_test(const Iterator i1, T v, mpl::false_)
{}
template <class Iterator, class T>
void writable_iterator_traversal_test(Iterator i1, T v, mpl::true_)
{
++i1; // we just wrote into that position
*i1++ = v;
Iterator x(i1++);
(void)x;
}
template <class Iterator, class T>
void writable_iterator_traversal_test(const Iterator i1, T v, mpl::false_)
{}
// Preconditions: *i == v
template <class Iterator, class T>
void readable_iterator_test(const Iterator i1, T v)
{
Iterator i2(i1); // Copy Constructible
typedef typename std::iterator_traits<Iterator>::reference ref_t;
ref_t r1 = *i1;
ref_t r2 = *i2;
T v1 = r1;
T v2 = r2;
BOOST_TEST(v1 == v);
BOOST_TEST(v2 == v);
# if !BOOST_WORKAROUND(__MWERKS__, <= 0x2407)
readable_iterator_traversal_test(i1, v, detail::is_postfix_incrementable<Iterator>());
// I think we don't really need this as it checks the same things as
// the above code.
BOOST_STATIC_ASSERT(is_readable_iterator<Iterator>::value);
# endif
}
template <class Iterator, class T>
void writable_iterator_test(Iterator i, T v, T v2)
{
Iterator i2(i); // Copy Constructible
*i2 = v;
# if !BOOST_WORKAROUND(__MWERKS__, <= 0x2407)
writable_iterator_traversal_test(
i, v2, mpl::and_<
detail::is_incrementable<Iterator>
, detail::is_postfix_incrementable<Iterator>
>());
# endif
}
template <class Iterator>
void swappable_iterator_test(Iterator i, Iterator j)
{
Iterator i2(i), j2(j);
typename std::iterator_traits<Iterator>::value_type bi = *i, bj = *j;
iter_swap(i2, j2);
typename std::iterator_traits<Iterator>::value_type ai = *i, aj = *j;
BOOST_TEST(bi == aj && bj == ai);
}
template <class Iterator, class T>
void constant_lvalue_iterator_test(Iterator i, T v1)
{
Iterator i2(i);
typedef typename std::iterator_traits<Iterator>::value_type value_type;
typedef typename std::iterator_traits<Iterator>::reference reference;
BOOST_STATIC_ASSERT((is_same<const value_type&, reference>::value));
const T& v2 = *i2;
BOOST_TEST(v1 == v2);
# ifndef BOOST_NO_LVALUE_RETURN_DETECTION
BOOST_STATIC_ASSERT(is_lvalue_iterator<Iterator>::value);
BOOST_STATIC_ASSERT(!is_non_const_lvalue_iterator<Iterator>::value);
# endif
}
template <class Iterator, class T>
void non_const_lvalue_iterator_test(Iterator i, T v1, T v2)
{
Iterator i2(i);
typedef typename std::iterator_traits<Iterator>::value_type value_type;
typedef typename std::iterator_traits<Iterator>::reference reference;
BOOST_STATIC_ASSERT((is_same<value_type&, reference>::value));
T& v3 = *i2;
BOOST_TEST(v1 == v3);
// A non-const lvalue iterator is not neccessarily writable, but we
// are assuming the value_type is assignable here
*i = v2;
T& v4 = *i2;
BOOST_TEST(v2 == v4);
# ifndef BOOST_NO_LVALUE_RETURN_DETECTION
BOOST_STATIC_ASSERT(is_lvalue_iterator<Iterator>::value);
BOOST_STATIC_ASSERT(is_non_const_lvalue_iterator<Iterator>::value);
# endif
}
template <class Iterator, class T>
void forward_readable_iterator_test(Iterator i, Iterator j, T val1, T val2)
{
Iterator i2;
Iterator i3(i);
i2 = i;
BOOST_TEST(i2 == i3);
BOOST_TEST(i != j);
BOOST_TEST(i2 != j);
readable_iterator_test(i, val1);
readable_iterator_test(i2, val1);
readable_iterator_test(i3, val1);
BOOST_TEST(i == i2++);
BOOST_TEST(i != ++i3);
readable_iterator_test(i2, val2);
readable_iterator_test(i3, val2);
readable_iterator_test(i, val1);
}
template <class Iterator, class T>
void forward_swappable_iterator_test(Iterator i, Iterator j, T val1, T val2)
{
forward_readable_iterator_test(i, j, val1, val2);
Iterator i2 = i;
++i2;
swappable_iterator_test(i, i2);
}
// bidirectional
// Preconditions: *i == v1, *++i == v2
template <class Iterator, class T>
void bidirectional_readable_iterator_test(Iterator i, T v1, T v2)
{
Iterator j(i);
++j;
forward_readable_iterator_test(i, j, v1, v2);
++i;
Iterator i1 = i, i2 = i;
BOOST_TEST(i == i1--);
BOOST_TEST(i != --i2);
readable_iterator_test(i, v2);
readable_iterator_test(i1, v1);
readable_iterator_test(i2, v1);
--i;
BOOST_TEST(i == i1);
BOOST_TEST(i == i2);
++i1;
++i2;
readable_iterator_test(i, v1);
readable_iterator_test(i1, v2);
readable_iterator_test(i2, v2);
}
// random access
// Preconditions: [i,i+N) is a valid range
template <class Iterator, class TrueVals>
void random_access_readable_iterator_test(Iterator i, int N, TrueVals vals)
{
bidirectional_readable_iterator_test(i, vals[0], vals[1]);
const Iterator j = i;
int c;
for (c = 0; c < N-1; ++c)
{
BOOST_TEST(i == j + c);
BOOST_TEST(*i == vals[c]);
typename std::iterator_traits<Iterator>::value_type x = j[c];
BOOST_TEST(*i == x);
BOOST_TEST(*i == *(j + c));
BOOST_TEST(*i == *(c + j));
++i;
BOOST_TEST(i > j);
BOOST_TEST(i >= j);
BOOST_TEST(j <= i);
BOOST_TEST(j < i);
}
Iterator k = j + N - 1;
for (c = 0; c < N-1; ++c)
{
BOOST_TEST(i == k - c);
BOOST_TEST(*i == vals[N - 1 - c]);
typename std::iterator_traits<Iterator>::value_type x = j[N - 1 - c];
BOOST_TEST(*i == x);
Iterator q = k - c;
BOOST_TEST(*i == *q);
BOOST_TEST(i > j);
BOOST_TEST(i >= j);
BOOST_TEST(j <= i);
BOOST_TEST(j < i);
--i;
}
}
} // namespace boost
# include <boost/iterator/detail/config_undef.hpp>
#endif // BOOST_NEW_ITERATOR_TESTS_HPP

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// (C) Copyright Toon Knapen 2001.
// (C) Copyright David Abrahams 2003.
// (C) Copyright Roland Richter 2003.
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_PERMUTATION_ITERATOR_HPP
#define BOOST_PERMUTATION_ITERATOR_HPP
#include <iterator>
#include <boost/iterator/iterator_adaptor.hpp>
namespace boost {
namespace iterators {
template< class ElementIterator
, class IndexIterator>
class permutation_iterator
: public iterator_adaptor<
permutation_iterator<ElementIterator, IndexIterator>
, IndexIterator, typename std::iterator_traits<ElementIterator>::value_type
, use_default, typename std::iterator_traits<ElementIterator>::reference>
{
typedef iterator_adaptor<
permutation_iterator<ElementIterator, IndexIterator>
, IndexIterator, typename std::iterator_traits<ElementIterator>::value_type
, use_default, typename std::iterator_traits<ElementIterator>::reference> super_t;
friend class iterator_core_access;
public:
permutation_iterator() : m_elt_iter() {}
explicit permutation_iterator(ElementIterator x, IndexIterator y)
: super_t(y), m_elt_iter(x) {}
template<class OtherElementIterator, class OtherIndexIterator>
permutation_iterator(
permutation_iterator<OtherElementIterator, OtherIndexIterator> const& r
, typename enable_if_convertible<OtherElementIterator, ElementIterator>::type* = 0
, typename enable_if_convertible<OtherIndexIterator, IndexIterator>::type* = 0
)
: super_t(r.base()), m_elt_iter(r.m_elt_iter)
{}
private:
typename super_t::reference dereference() const
{ return *(m_elt_iter + *this->base()); }
#ifndef BOOST_NO_MEMBER_TEMPLATE_FRIENDS
template <class,class> friend class permutation_iterator;
#else
public:
#endif
ElementIterator m_elt_iter;
};
template <class ElementIterator, class IndexIterator>
inline permutation_iterator<ElementIterator, IndexIterator>
make_permutation_iterator( ElementIterator e, IndexIterator i )
{
return permutation_iterator<ElementIterator, IndexIterator>( e, i );
}
} // namespace iterators
using iterators::permutation_iterator;
using iterators::make_permutation_iterator;
} // namespace boost
#endif

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// (C) Copyright David Abrahams 2002.
// (C) Copyright Jeremy Siek 2002.
// (C) Copyright Thomas Witt 2002.
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_REVERSE_ITERATOR_23022003THW_HPP
#define BOOST_REVERSE_ITERATOR_23022003THW_HPP
#include <boost/iterator/iterator_adaptor.hpp>
namespace boost {
namespace iterators {
//
//
//
template <class Iterator>
class reverse_iterator
: public iterator_adaptor< reverse_iterator<Iterator>, Iterator >
{
typedef iterator_adaptor< reverse_iterator<Iterator>, Iterator > super_t;
friend class iterator_core_access;
public:
reverse_iterator() {}
explicit reverse_iterator(Iterator x)
: super_t(x) {}
template<class OtherIterator>
reverse_iterator(
reverse_iterator<OtherIterator> const& r
, typename enable_if_convertible<OtherIterator, Iterator>::type* = 0
)
: super_t(r.base())
{}
private:
typename super_t::reference dereference() const
{
Iterator it = this->base_reference();
--it;
return *it;
}
void increment() { --this->base_reference(); }
void decrement() { ++this->base_reference(); }
void advance(typename super_t::difference_type n)
{
this->base_reference() -= n;
}
template <class OtherIterator>
typename super_t::difference_type
distance_to(reverse_iterator<OtherIterator> const& y) const
{
return this->base_reference() - y.base();
}
};
template <class BidirectionalIterator>
inline reverse_iterator<BidirectionalIterator> make_reverse_iterator(BidirectionalIterator x)
{
return reverse_iterator<BidirectionalIterator>(x);
}
} // namespace iterators
using iterators::reverse_iterator;
using iterators::make_reverse_iterator;
} // namespace boost
#endif // BOOST_REVERSE_ITERATOR_23022003THW_HPP

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// (C) Copyright David Abrahams 2002.
// (C) Copyright Jeremy Siek 2002.
// (C) Copyright Thomas Witt 2002.
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_TRANSFORM_ITERATOR_23022003THW_HPP
#define BOOST_TRANSFORM_ITERATOR_23022003THW_HPP
#include <boost/config.hpp>
#include <boost/config/workaround.hpp>
#include <boost/iterator/detail/enable_if.hpp>
#include <boost/iterator/iterator_adaptor.hpp>
#include <boost/iterator/iterator_categories.hpp>
#include <boost/type_traits/function_traits.hpp>
#include <boost/type_traits/is_const.hpp>
#include <boost/type_traits/is_class.hpp>
#include <boost/type_traits/is_function.hpp>
#include <boost/type_traits/is_reference.hpp>
#include <boost/type_traits/remove_const.hpp>
#include <boost/type_traits/remove_reference.hpp>
#include <boost/utility/result_of.hpp>
#include <iterator>
#if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1310))
#include <boost/type_traits/is_base_and_derived.hpp>
#endif
#if !BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003))
#include <boost/static_assert.hpp>
#endif
#include <boost/iterator/detail/config_def.hpp>
namespace boost {
namespace iterators {
template <class UnaryFunction, class Iterator, class Reference = use_default, class Value = use_default>
class transform_iterator;
namespace detail
{
// Compute the iterator_adaptor instantiation to be used for transform_iterator
template <class UnaryFunc, class Iterator, class Reference, class Value>
struct transform_iterator_base
{
private:
// By default, dereferencing the iterator yields the same as
// the function.
typedef typename ia_dflt_help<
Reference
#ifdef BOOST_RESULT_OF_USE_TR1
, result_of<const UnaryFunc(typename std::iterator_traits<Iterator>::reference)>
#else
, result_of<const UnaryFunc&(typename std::iterator_traits<Iterator>::reference)>
#endif
>::type reference;
// To get the default for Value: remove any reference on the
// result type, but retain any constness to signal
// non-writability. Note that if we adopt Thomas' suggestion
// to key non-writability *only* on the Reference argument,
// we'd need to strip constness here as well.
typedef typename ia_dflt_help<
Value
, remove_reference<reference>
>::type cv_value_type;
public:
typedef iterator_adaptor<
transform_iterator<UnaryFunc, Iterator, Reference, Value>
, Iterator
, cv_value_type
, use_default // Leave the traversal category alone
, reference
> type;
};
}
template <class UnaryFunc, class Iterator, class Reference, class Value>
class transform_iterator
: public boost::iterators::detail::transform_iterator_base<UnaryFunc, Iterator, Reference, Value>::type
{
typedef typename
boost::iterators::detail::transform_iterator_base<UnaryFunc, Iterator, Reference, Value>::type
super_t;
friend class iterator_core_access;
public:
transform_iterator() { }
transform_iterator(Iterator const& x, UnaryFunc f)
: super_t(x), m_f(f) { }
explicit transform_iterator(Iterator const& x)
: super_t(x)
{
// Pro8 is a little too aggressive about instantiating the
// body of this function.
#if !BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003))
// don't provide this constructor if UnaryFunc is a
// function pointer type, since it will be 0. Too dangerous.
BOOST_STATIC_ASSERT(is_class<UnaryFunc>::value);
#endif
}
template <
class OtherUnaryFunction
, class OtherIterator
, class OtherReference
, class OtherValue>
transform_iterator(
transform_iterator<OtherUnaryFunction, OtherIterator, OtherReference, OtherValue> const& t
, typename enable_if_convertible<OtherIterator, Iterator>::type* = 0
#if !BOOST_WORKAROUND(BOOST_MSVC, == 1310)
, typename enable_if_convertible<OtherUnaryFunction, UnaryFunc>::type* = 0
#endif
)
: super_t(t.base()), m_f(t.functor())
{}
UnaryFunc functor() const
{ return m_f; }
private:
typename super_t::reference dereference() const
{ return m_f(*this->base()); }
// Probably should be the initial base class so it can be
// optimized away via EBO if it is an empty class.
UnaryFunc m_f;
};
template <class UnaryFunc, class Iterator>
inline transform_iterator<UnaryFunc, Iterator>
make_transform_iterator(Iterator it, UnaryFunc fun)
{
return transform_iterator<UnaryFunc, Iterator>(it, fun);
}
// Version which allows explicit specification of the UnaryFunc
// type.
//
// This generator is not provided if UnaryFunc is a function
// pointer type, because it's too dangerous: the default-constructed
// function pointer in the iterator be 0, leading to a runtime
// crash.
template <class UnaryFunc, class Iterator>
inline typename iterators::enable_if<
is_class<UnaryFunc> // We should probably find a cheaper test than is_class<>
, transform_iterator<UnaryFunc, Iterator>
>::type
make_transform_iterator(Iterator it)
{
return transform_iterator<UnaryFunc, Iterator>(it, UnaryFunc());
}
#if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) && !defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING)
template <class Return, class Argument, class Iterator>
inline transform_iterator< Return (*)(Argument), Iterator, Return>
make_transform_iterator(Iterator it, Return (*fun)(Argument))
{
return transform_iterator<Return (*)(Argument), Iterator, Return>(it, fun);
}
#endif
} // namespace iterators
using iterators::transform_iterator;
using iterators::make_transform_iterator;
} // namespace boost
#include <boost/iterator/detail/config_undef.hpp>
#endif // BOOST_TRANSFORM_ITERATOR_23022003THW_HPP

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// Copyright David Abrahams and Thomas Becker 2000-2006.
// Copyright Kohei Takahashi 2012-2014.
//
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_ZIP_ITERATOR_TMB_07_13_2003_HPP_
# define BOOST_ZIP_ITERATOR_TMB_07_13_2003_HPP_
#include <stddef.h>
#include <boost/iterator/iterator_traits.hpp>
#include <boost/iterator/iterator_facade.hpp>
#include <boost/iterator/iterator_adaptor.hpp> // for enable_if_convertible
#include <boost/iterator/iterator_categories.hpp>
#include <boost/iterator/minimum_category.hpp>
#include <utility> // for std::pair
#include <boost/fusion/adapted/boost_tuple.hpp> // for backward compatibility
#include <boost/type_traits/remove_reference.hpp>
#include <boost/type_traits/remove_cv.hpp>
#include <boost/mpl/at.hpp>
#include <boost/mpl/fold.hpp>
#include <boost/mpl/transform.hpp>
#include <boost/mpl/placeholders.hpp>
#include <boost/fusion/algorithm/iteration/for_each.hpp>
#include <boost/fusion/algorithm/transformation/transform.hpp>
#include <boost/fusion/sequence/convert.hpp>
#include <boost/fusion/sequence/intrinsic/at_c.hpp>
#include <boost/fusion/sequence/comparison/equal_to.hpp>
#include <boost/fusion/support/tag_of_fwd.hpp>
namespace boost {
namespace iterators {
// Zip iterator forward declaration for zip_iterator_base
template<typename IteratorTuple>
class zip_iterator;
namespace detail
{
// Functors to be used with tuple algorithms
//
template<typename DiffType>
class advance_iterator
{
public:
advance_iterator(DiffType step) : m_step(step) {}
template<typename Iterator>
void operator()(Iterator& it) const
{ it += m_step; }
private:
DiffType m_step;
};
//
struct increment_iterator
{
template<typename Iterator>
void operator()(Iterator& it) const
{ ++it; }
};
//
struct decrement_iterator
{
template<typename Iterator>
void operator()(Iterator& it) const
{ --it; }
};
//
struct dereference_iterator
{
template<typename>
struct result;
template<typename This, typename Iterator>
struct result<This(Iterator)>
{
typedef typename
remove_cv<typename remove_reference<Iterator>::type>::type
iterator;
typedef typename iterator_reference<iterator>::type type;
};
template<typename Iterator>
typename result<dereference_iterator(Iterator)>::type
operator()(Iterator const& it) const
{ return *it; }
};
// Metafunction to obtain the type of the tuple whose element types
// are the reference types of an iterator tuple.
//
template<typename IteratorTuple>
struct tuple_of_references
: mpl::transform<
IteratorTuple,
iterator_reference<mpl::_1>
>
{
};
// Specialization for std::pair
template<typename Iterator1, typename Iterator2>
struct tuple_of_references<std::pair<Iterator1, Iterator2> >
{
typedef std::pair<
typename iterator_reference<Iterator1>::type
, typename iterator_reference<Iterator2>::type
> type;
};
// Metafunction to obtain the minimal traversal tag in a tuple
// of iterators.
//
template<typename IteratorTuple>
struct minimum_traversal_category_in_iterator_tuple
{
typedef typename mpl::transform<
IteratorTuple
, pure_traversal_tag<iterator_traversal<> >
>::type tuple_of_traversal_tags;
typedef typename mpl::fold<
tuple_of_traversal_tags
, random_access_traversal_tag
, minimum_category<>
>::type type;
};
template<typename Iterator1, typename Iterator2>
struct minimum_traversal_category_in_iterator_tuple<std::pair<Iterator1, Iterator2> >
{
typedef typename pure_traversal_tag<
typename iterator_traversal<Iterator1>::type
>::type iterator1_traversal;
typedef typename pure_traversal_tag<
typename iterator_traversal<Iterator2>::type
>::type iterator2_traversal;
typedef typename minimum_category<
iterator1_traversal
, typename minimum_category<
iterator2_traversal
, random_access_traversal_tag
>::type
>::type type;
};
///////////////////////////////////////////////////////////////////
//
// Class zip_iterator_base
//
// Builds and exposes the iterator facade type from which the zip
// iterator will be derived.
//
template<typename IteratorTuple>
struct zip_iterator_base
{
private:
// Reference type is the type of the tuple obtained from the
// iterators' reference types.
typedef typename
detail::tuple_of_references<IteratorTuple>::type reference;
// Value type is the same as reference type.
typedef reference value_type;
// Difference type is the first iterator's difference type
typedef typename iterator_difference<
typename mpl::at_c<IteratorTuple, 0>::type
>::type difference_type;
// Traversal catetgory is the minimum traversal category in the
// iterator tuple.
typedef typename
detail::minimum_traversal_category_in_iterator_tuple<
IteratorTuple
>::type traversal_category;
public:
// The iterator facade type from which the zip iterator will
// be derived.
typedef iterator_facade<
zip_iterator<IteratorTuple>,
value_type,
traversal_category,
reference,
difference_type
> type;
};
template <>
struct zip_iterator_base<int>
{
typedef int type;
};
template <typename reference>
struct converter
{
template <typename Seq>
static reference call(Seq seq)
{
typedef typename fusion::traits::tag_of<reference>::type tag;
return fusion::convert<tag>(seq);
}
};
template <typename Reference1, typename Reference2>
struct converter<std::pair<Reference1, Reference2> >
{
typedef std::pair<Reference1, Reference2> reference;
template <typename Seq>
static reference call(Seq seq)
{
return reference(
fusion::at_c<0>(seq)
, fusion::at_c<1>(seq));
}
};
}
/////////////////////////////////////////////////////////////////////
//
// zip_iterator class definition
//
template<typename IteratorTuple>
class zip_iterator :
public detail::zip_iterator_base<IteratorTuple>::type
{
// Typedef super_t as our base class.
typedef typename
detail::zip_iterator_base<IteratorTuple>::type super_t;
// iterator_core_access is the iterator's best friend.
friend class iterator_core_access;
public:
// Construction
// ============
// Default constructor
zip_iterator() { }
// Constructor from iterator tuple
zip_iterator(IteratorTuple iterator_tuple)
: m_iterator_tuple(iterator_tuple)
{ }
// Copy constructor
template<typename OtherIteratorTuple>
zip_iterator(
const zip_iterator<OtherIteratorTuple>& other,
typename enable_if_convertible<
OtherIteratorTuple,
IteratorTuple
>::type* = 0
) : m_iterator_tuple(other.get_iterator_tuple())
{}
// Get method for the iterator tuple.
const IteratorTuple& get_iterator_tuple() const
{ return m_iterator_tuple; }
private:
// Implementation of Iterator Operations
// =====================================
// Dereferencing returns a tuple built from the dereferenced
// iterators in the iterator tuple.
typename super_t::reference dereference() const
{
typedef typename super_t::reference reference;
typedef detail::converter<reference> gen;
return gen::call(fusion::transform(
get_iterator_tuple(),
detail::dereference_iterator()));
}
// Two zip iterators are equal if all iterators in the iterator
// tuple are equal. NOTE: It should be possible to implement this
// as
//
// return get_iterator_tuple() == other.get_iterator_tuple();
//
// but equality of tuples currently (7/2003) does not compile
// under several compilers. No point in bringing in a bunch
// of #ifdefs here.
//
template<typename OtherIteratorTuple>
bool equal(const zip_iterator<OtherIteratorTuple>& other) const
{
return fusion::equal_to(
get_iterator_tuple(),
other.get_iterator_tuple());
}
// Advancing a zip iterator means to advance all iterators in the
// iterator tuple.
void advance(typename super_t::difference_type n)
{
fusion::for_each(
m_iterator_tuple,
detail::advance_iterator<BOOST_DEDUCED_TYPENAME super_t::difference_type>(n));
}
// Incrementing a zip iterator means to increment all iterators in
// the iterator tuple.
void increment()
{
fusion::for_each(
m_iterator_tuple,
detail::increment_iterator());
}
// Decrementing a zip iterator means to decrement all iterators in
// the iterator tuple.
void decrement()
{
fusion::for_each(
m_iterator_tuple,
detail::decrement_iterator());
}
// Distance is calculated using the first iterator in the tuple.
template<typename OtherIteratorTuple>
typename super_t::difference_type distance_to(
const zip_iterator<OtherIteratorTuple>& other
) const
{
return fusion::at_c<0>(other.get_iterator_tuple()) -
fusion::at_c<0>(this->get_iterator_tuple());
}
// Data Members
// ============
// The iterator tuple.
IteratorTuple m_iterator_tuple;
};
// Make function for zip iterator
//
template<typename IteratorTuple>
inline zip_iterator<IteratorTuple>
make_zip_iterator(IteratorTuple t)
{ return zip_iterator<IteratorTuple>(t); }
} // namespace iterators
using iterators::zip_iterator;
using iterators::make_zip_iterator;
} // namespace boost
#endif

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// Copyright David Abrahams 2004. Distributed under the Boost
// Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
// See www.boost.org/libs/iterator for documentation.
#ifndef ITERATOR_ADAPTORS_DWA2004725_HPP
# define ITERATOR_ADAPTORS_DWA2004725_HPP
#define BOOST_ITERATOR_ADAPTORS_VERSION 0x0200
#include <boost/iterator/iterator_adaptor.hpp>
#endif // ITERATOR_ADAPTORS_DWA2004725_HPP

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// Boost next_prior.hpp header file ---------------------------------------//
// (C) Copyright Dave Abrahams and Daniel Walker 1999-2003.
// Copyright (c) Andrey Semashev 2017
//
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
// See http://www.boost.org/libs/utility for documentation.
// Revision History
// 13 Dec 2003 Added next(x, n) and prior(x, n) (Daniel Walker)
#ifndef BOOST_NEXT_PRIOR_HPP_INCLUDED
#define BOOST_NEXT_PRIOR_HPP_INCLUDED
#include <iterator>
#include <boost/config.hpp>
#include <boost/core/enable_if.hpp>
#include <boost/type_traits/has_plus.hpp>
#include <boost/type_traits/has_plus_assign.hpp>
#include <boost/type_traits/has_minus.hpp>
#include <boost/type_traits/has_minus_assign.hpp>
#include <boost/iterator/advance.hpp>
#include <boost/iterator/reverse_iterator.hpp>
namespace boost {
// Helper functions for classes like bidirectional iterators not supporting
// operator+ and operator-
//
// Usage:
// const std::list<T>::iterator p = get_some_iterator();
// const std::list<T>::iterator prev = boost::prior(p);
// const std::list<T>::iterator next = boost::next(prev, 2);
// Contributed by Dave Abrahams
namespace next_prior_detail {
// The trait attempts to detect if the T type is an iterator. Class-type iterators are assumed
// to have the nested type iterator_category. Strictly speaking, this is not required to be the
// case (e.g. a user can specialize iterator_traits for T without defining T::iterator_category).
// Still, this is a good heuristic in practice, and we can't do anything better anyway.
// Since C++17 we can test for iterator_traits<T>::iterator_category presence instead as it is
// required to be only present for iterators.
template< typename T, typename Void = void >
struct is_iterator_class
{
static BOOST_CONSTEXPR_OR_CONST bool value = false;
};
template< typename T >
struct is_iterator_class<
T,
typename enable_if_has_type<
#if !defined(BOOST_NO_CXX17_ITERATOR_TRAITS)
typename std::iterator_traits< T >::iterator_category
#else
typename T::iterator_category
#endif
>::type
>
{
static BOOST_CONSTEXPR_OR_CONST bool value = true;
};
template< typename T >
struct is_iterator :
public is_iterator_class< T >
{
};
template< typename T >
struct is_iterator< T* >
{
static BOOST_CONSTEXPR_OR_CONST bool value = true;
};
template< typename T, typename Distance, bool HasPlus = has_plus< T, Distance >::value >
struct next_plus_impl;
template< typename T, typename Distance >
struct next_plus_impl< T, Distance, true >
{
static T call(T x, Distance n)
{
return x + n;
}
};
template< typename T, typename Distance, bool HasPlusAssign = has_plus_assign< T, Distance >::value >
struct next_plus_assign_impl :
public next_plus_impl< T, Distance >
{
};
template< typename T, typename Distance >
struct next_plus_assign_impl< T, Distance, true >
{
static T call(T x, Distance n)
{
x += n;
return x;
}
};
template< typename T, typename Distance, bool IsIterator = is_iterator< T >::value >
struct next_advance_impl :
public next_plus_assign_impl< T, Distance >
{
};
template< typename T, typename Distance >
struct next_advance_impl< T, Distance, true >
{
static T call(T x, Distance n)
{
boost::iterators::advance(x, n);
return x;
}
};
template< typename T, typename Distance, bool HasMinus = has_minus< T, Distance >::value >
struct prior_minus_impl;
template< typename T, typename Distance >
struct prior_minus_impl< T, Distance, true >
{
static T call(T x, Distance n)
{
return x - n;
}
};
template< typename T, typename Distance, bool HasMinusAssign = has_minus_assign< T, Distance >::value >
struct prior_minus_assign_impl :
public prior_minus_impl< T, Distance >
{
};
template< typename T, typename Distance >
struct prior_minus_assign_impl< T, Distance, true >
{
static T call(T x, Distance n)
{
x -= n;
return x;
}
};
template< typename T, typename Distance, bool IsIterator = is_iterator< T >::value >
struct prior_advance_impl :
public prior_minus_assign_impl< T, Distance >
{
};
template< typename T, typename Distance >
struct prior_advance_impl< T, Distance, true >
{
static T call(T x, Distance n)
{
// Avoid negating n to sidestep possible integer overflow
boost::iterators::reverse_iterator< T > rx(x);
boost::iterators::advance(rx, n);
return rx.base();
}
};
} // namespace next_prior_detail
template <class T>
inline T next(T x) { return ++x; }
template <class T, class Distance>
inline T next(T x, Distance n)
{
return next_prior_detail::next_advance_impl< T, Distance >::call(x, n);
}
template <class T>
inline T prior(T x) { return --x; }
template <class T, class Distance>
inline T prior(T x, Distance n)
{
return next_prior_detail::prior_advance_impl< T, Distance >::call(x, n);
}
} // namespace boost
#endif // BOOST_NEXT_PRIOR_HPP_INCLUDED

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// (C) Copyright Jeremy Siek 1999.
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_INT_ITERATOR_H
#define BOOST_INT_ITERATOR_H
#if !defined BOOST_MSVC
#include <boost/operators.hpp>
#endif
#include <iostream>
#include <iterator>
#include <cstddef>
//using namespace std;
#ifndef BOOST_NO_OPERATORS_IN_NAMESPACE
namespace boost {
namespace iterators {
#endif
// this should use random_access_iterator_helper but I've had
// VC++ portablility problems with that. -JGS
template <class IntT>
class int_iterator
{
typedef int_iterator self;
public:
typedef std::random_access_iterator_tag iterator_category;
typedef IntT value_type;
typedef IntT& reference;
typedef IntT* pointer;
typedef std::ptrdiff_t difference_type;
inline int_iterator() : _i(0) { }
inline int_iterator(IntT i) : _i(i) { }
inline int_iterator(const self& x) : _i(x._i) { }
inline self& operator=(const self& x) { _i = x._i; return *this; }
inline IntT operator*() { return _i; }
inline IntT operator[](IntT n) { return _i + n; }
inline self& operator++() { ++_i; return *this; }
inline self operator++(int) { self t = *this; ++_i; return t; }
inline self& operator+=(IntT n) { _i += n; return *this; }
inline self operator+(IntT n) { self t = *this; t += n; return t; }
inline self& operator--() { --_i; return *this; }
inline self operator--(int) { self t = *this; --_i; return t; }
inline self& operator-=(IntT n) { _i -= n; return *this; }
inline IntT operator-(const self& x) const { return _i - x._i; }
inline bool operator==(const self& x) const { return _i == x._i; }
// vc++ had a problem finding != in random_access_iterator_helper
// need to look into this... for now implementing everything here -JGS
inline bool operator!=(const self& x) const { return _i != x._i; }
inline bool operator<(const self& x) const { return _i < x._i; }
inline bool operator<=(const self& x) const { return _i <= x._i; }
inline bool operator>(const self& x) const { return _i > x._i; }
inline bool operator>=(const self& x) const { return _i >= x._i; }
protected:
IntT _i;
};
template <class IntT>
inline int_iterator<IntT>
operator+(IntT n, int_iterator<IntT> t) { t += n; return t; }
#ifndef BOOST_NO_OPERATORS_IN_NAMESPACE
} /* namespace iterators */
using iterators::int_iterator;
} /* namespace boost */
#endif
#ifdef BOOST_NO_OPERATORS_IN_NAMESPACE
namespace boost {
using ::int_iterator;
namespace iterators {
using ::int_iterator;
}}
#endif
#endif /* BOOST_INT_ITERATOR_H */

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// Copyright David Abrahams 2003.
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#include <boost/iterator_adaptors.hpp>

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// Copyright David Abrahams and Jeremy Siek 2003.
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_ITERATOR_TESTS_HPP
# define BOOST_ITERATOR_TESTS_HPP
// This is meant to be the beginnings of a comprehensive, generic
// test suite for STL concepts such as iterators and containers.
//
// Revision History:
// 28 Apr 2002 Fixed input iterator requirements.
// For a == b a++ == b++ is no longer required.
// See 24.1.1/3 for details.
// (Thomas Witt)
// 08 Feb 2001 Fixed bidirectional iterator test so that
// --i is no longer a precondition.
// (Jeremy Siek)
// 04 Feb 2001 Added lvalue test, corrected preconditions
// (David Abrahams)
# include <iterator>
# include <boost/static_assert.hpp>
# include <boost/concept_archetype.hpp> // for detail::dummy_constructor
# include <boost/implicit_cast.hpp>
# include <boost/core/ignore_unused.hpp>
# include <boost/core/lightweight_test.hpp>
# include <boost/type_traits/is_same.hpp>
# include <boost/type_traits/is_pointer.hpp>
# include <boost/type_traits/is_reference.hpp>
namespace boost {
// use this for the value type
struct dummyT {
dummyT() { }
dummyT(detail::dummy_constructor) { }
dummyT(int x) : m_x(x) { }
int foo() const { return m_x; }
bool operator==(const dummyT& d) const { return m_x == d.m_x; }
int m_x;
};
}
namespace boost {
namespace iterators {
// Tests whether type Iterator satisfies the requirements for a
// TrivialIterator.
// Preconditions: i != j, *i == val
template <class Iterator, class T>
void trivial_iterator_test(const Iterator i, const Iterator j, T val)
{
Iterator k;
BOOST_TEST(i == i);
BOOST_TEST(j == j);
BOOST_TEST(i != j);
#ifdef BOOST_NO_STD_ITERATOR_TRAITS
T v = *i;
#else
typename std::iterator_traits<Iterator>::value_type v = *i;
#endif
BOOST_TEST(v == val);
boost::ignore_unused(v);
#if 0
// hmm, this will give a warning for transform_iterator... perhaps
// this should be separated out into a stand-alone test since there
// are several situations where it can't be used, like for
// integer_range::iterator.
BOOST_TEST(v == i->foo());
#endif
k = i;
BOOST_TEST(k == k);
BOOST_TEST(k == i);
BOOST_TEST(k != j);
BOOST_TEST(*k == val);
boost::ignore_unused(k);
}
// Preconditions: i != j
template <class Iterator, class T>
void mutable_trivial_iterator_test(const Iterator i, const Iterator j, T val)
{
*i = val;
trivial_iterator_test(i, j, val);
}
// Preconditions: *i == v1, *++i == v2
template <class Iterator, class T>
void input_iterator_test(Iterator i, T v1, T v2)
{
Iterator i1(i);
BOOST_TEST(i == i1);
BOOST_TEST(!(i != i1));
// I can see no generic way to create an input iterator
// that is in the domain of== of i and != i.
// The following works for istream_iterator but is not
// guaranteed to work for arbitrary input iterators.
//
// Iterator i2;
//
// BOOST_TEST(i != i2);
// BOOST_TEST(!(i == i2));
BOOST_TEST(*i1 == v1);
BOOST_TEST(*i == v1);
// we cannot test for equivalence of (void)++i & (void)i++
// as i is only guaranteed to be single pass.
BOOST_TEST(*i++ == v1);
boost::ignore_unused(i1);
i1 = i;
BOOST_TEST(i == i1);
BOOST_TEST(!(i != i1));
BOOST_TEST(*i1 == v2);
BOOST_TEST(*i == v2);
boost::ignore_unused(i1);
// i is dereferencable, so it must be incrementable.
++i;
// how to test for operator-> ?
}
// how to test output iterator?
template <bool is_pointer> struct lvalue_test
{
template <class Iterator> static void check(Iterator)
{
# ifndef BOOST_NO_STD_ITERATOR_TRAITS
typedef typename std::iterator_traits<Iterator>::reference reference;
typedef typename std::iterator_traits<Iterator>::value_type value_type;
# else
typedef typename Iterator::reference reference;
typedef typename Iterator::value_type value_type;
# endif
BOOST_STATIC_ASSERT(boost::is_reference<reference>::value);
BOOST_STATIC_ASSERT((boost::is_same<reference,value_type&>::value
|| boost::is_same<reference,const value_type&>::value
));
}
};
# ifdef BOOST_NO_STD_ITERATOR_TRAITS
template <> struct lvalue_test<true> {
template <class T> static void check(T) {}
};
#endif
template <class Iterator, class T>
void forward_iterator_test(Iterator i, T v1, T v2)
{
input_iterator_test(i, v1, v2);
Iterator i1 = i, i2 = i;
BOOST_TEST(i == i1++);
BOOST_TEST(i != ++i2);
trivial_iterator_test(i, i1, v1);
trivial_iterator_test(i, i2, v1);
++i;
BOOST_TEST(i == i1);
BOOST_TEST(i == i2);
++i1;
++i2;
trivial_iterator_test(i, i1, v2);
trivial_iterator_test(i, i2, v2);
// borland doesn't allow non-type template parameters
# if !defined(BOOST_BORLANDC) || (BOOST_BORLANDC > 0x551)
lvalue_test<(boost::is_pointer<Iterator>::value)>::check(i);
#endif
}
// Preconditions: *i == v1, *++i == v2
template <class Iterator, class T>
void bidirectional_iterator_test(Iterator i, T v1, T v2)
{
forward_iterator_test(i, v1, v2);
++i;
Iterator i1 = i, i2 = i;
BOOST_TEST(i == i1--);
BOOST_TEST(i != --i2);
trivial_iterator_test(i, i1, v2);
trivial_iterator_test(i, i2, v2);
--i;
BOOST_TEST(i == i1);
BOOST_TEST(i == i2);
++i1;
++i2;
trivial_iterator_test(i, i1, v1);
trivial_iterator_test(i, i2, v1);
}
// mutable_bidirectional_iterator_test
template <class U> struct undefined;
// Preconditions: [i,i+N) is a valid range
template <class Iterator, class TrueVals>
void random_access_iterator_test(Iterator i, int N, TrueVals vals)
{
bidirectional_iterator_test(i, vals[0], vals[1]);
const Iterator j = i;
int c;
typedef typename std::iterator_traits<Iterator>::value_type value_type;
boost::ignore_unused<value_type>();
for (c = 0; c < N-1; ++c) {
BOOST_TEST(i == j + c);
BOOST_TEST(*i == vals[c]);
BOOST_TEST(*i == boost::implicit_cast<value_type>(j[c]));
BOOST_TEST(*i == *(j + c));
BOOST_TEST(*i == *(c + j));
++i;
BOOST_TEST(i > j);
BOOST_TEST(i >= j);
BOOST_TEST(j <= i);
BOOST_TEST(j < i);
}
Iterator k = j + N - 1;
for (c = 0; c < N-1; ++c) {
BOOST_TEST(i == k - c);
BOOST_TEST(*i == vals[N - 1 - c]);
BOOST_TEST(*i == boost::implicit_cast<value_type>(j[N - 1 - c]));
Iterator q = k - c;
boost::ignore_unused(q);
BOOST_TEST(*i == *q);
BOOST_TEST(i > j);
BOOST_TEST(i >= j);
BOOST_TEST(j <= i);
BOOST_TEST(j < i);
--i;
}
}
// Precondition: i != j
template <class Iterator, class ConstIterator>
void const_nonconst_iterator_test(Iterator i, ConstIterator j)
{
BOOST_TEST(i != j);
BOOST_TEST(j != i);
ConstIterator k(i);
BOOST_TEST(k == i);
BOOST_TEST(i == k);
k = i;
BOOST_TEST(k == i);
BOOST_TEST(i == k);
boost::ignore_unused(k);
}
} // namespace iterators
using iterators::undefined;
using iterators::trivial_iterator_test;
using iterators::mutable_trivial_iterator_test;
using iterators::input_iterator_test;
using iterators::lvalue_test;
using iterators::forward_iterator_test;
using iterators::bidirectional_iterator_test;
using iterators::random_access_iterator_test;
using iterators::const_nonconst_iterator_test;
} // namespace boost
#endif // BOOST_ITERATOR_TESTS_HPP

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#ifndef POINTEE_DWA200415_HPP
# define POINTEE_DWA200415_HPP
//
// Copyright David Abrahams 2004. 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)
//
// typename pointee<P>::type provides the pointee type of P.
//
// For example, it is T for T* and X for shared_ptr<X>.
//
// http://www.boost.org/libs/iterator/doc/pointee.html
//
# include <boost/detail/is_incrementable.hpp>
# include <boost/iterator/iterator_traits.hpp>
# include <boost/type_traits/add_const.hpp>
# include <boost/type_traits/remove_cv.hpp>
# include <boost/mpl/if.hpp>
# include <boost/mpl/eval_if.hpp>
#include <iterator>
namespace boost {
namespace detail
{
template <class P>
struct smart_ptr_pointee
{
typedef typename P::element_type type;
};
template <class Iterator>
struct iterator_pointee
{
typedef typename std::iterator_traits<Iterator>::value_type value_type;
struct impl
{
template <class T>
static char test(T const&);
static char (& test(value_type&) )[2];
static Iterator& x;
};
BOOST_STATIC_CONSTANT(bool, is_constant = sizeof(impl::test(*impl::x)) == 1);
typedef typename mpl::if_c<
# if BOOST_WORKAROUND(BOOST_BORLANDC, BOOST_TESTED_AT(0x551))
::boost::detail::iterator_pointee<Iterator>::is_constant
# else
is_constant
# endif
, typename add_const<value_type>::type
, value_type
>::type type;
};
}
template <class P>
struct pointee
: mpl::eval_if<
detail::is_incrementable<P>
, detail::iterator_pointee<P>
, detail::smart_ptr_pointee<P>
>
{
};
} // namespace boost
#endif // POINTEE_DWA200415_HPP

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// (C) Copyright Ronald Garcia 2002. Permission to copy, use, modify, sell and
// distribute this software is granted provided this copyright notice appears
// in all copies. This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
// See http://www.boost.org/libs/utility/shared_container_iterator.html for documentation.
#ifndef BOOST_SHARED_CONTAINER_ITERATOR_HPP
#define BOOST_SHARED_CONTAINER_ITERATOR_HPP
#include "boost/iterator_adaptors.hpp"
#include "boost/shared_ptr.hpp"
#include <utility>
namespace boost {
namespace iterators {
template <typename Container>
class shared_container_iterator : public iterator_adaptor<
shared_container_iterator<Container>,
typename Container::iterator> {
typedef iterator_adaptor<
shared_container_iterator<Container>,
typename Container::iterator> super_t;
typedef typename Container::iterator iterator_t;
typedef boost::shared_ptr<Container> container_ref_t;
container_ref_t container_ref;
public:
shared_container_iterator() { }
shared_container_iterator(iterator_t const& x,container_ref_t const& c) :
super_t(x), container_ref(c) { }
};
template <typename Container>
inline shared_container_iterator<Container>
make_shared_container_iterator(typename Container::iterator iter,
boost::shared_ptr<Container> const& container) {
typedef shared_container_iterator<Container> iterator;
return iterator(iter,container);
}
template <typename Container>
inline std::pair<
shared_container_iterator<Container>,
shared_container_iterator<Container> >
make_shared_container_range(boost::shared_ptr<Container> const& container) {
return
std::make_pair(
make_shared_container_iterator(container->begin(),container),
make_shared_container_iterator(container->end(),container));
}
} // namespace iterators
using iterators::shared_container_iterator;
using iterators::make_shared_container_iterator;
using iterators::make_shared_container_range;
} // namespace boost
#endif