Squashed 'third_party/boostorg/utility/' content from commit ebe4429
Change-Id: I8e6ee78273db31df18f99d29034f855ccc064551
git-subtree-dir: third_party/boostorg/utility
git-subtree-split: ebe44296ca698e333a09e8268ea8ccedb3886c4d
diff --git a/include/boost/detail/call_traits.hpp b/include/boost/detail/call_traits.hpp
new file mode 100644
index 0000000..36dea00
--- /dev/null
+++ b/include/boost/detail/call_traits.hpp
@@ -0,0 +1,172 @@
+// (C) Copyright Steve Cleary, Beman Dawes, Howard Hinnant & John Maddock 2000.
+// Use, modification and distribution are subject to the Boost Software License,
+// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt).
+//
+// See http://www.boost.org/libs/utility for most recent version including documentation.
+
+// call_traits: defines typedefs for function usage
+// (see libs/utility/call_traits.htm)
+
+/* Release notes:
+ 23rd July 2000:
+ Fixed array specialization. (JM)
+ Added Borland specific fixes for reference types
+ (issue raised by Steve Cleary).
+*/
+
+#ifndef BOOST_DETAIL_CALL_TRAITS_HPP
+#define BOOST_DETAIL_CALL_TRAITS_HPP
+
+#ifndef BOOST_CONFIG_HPP
+#include <boost/config.hpp>
+#endif
+#include <cstddef>
+
+#include <boost/type_traits/is_arithmetic.hpp>
+#include <boost/type_traits/is_enum.hpp>
+#include <boost/type_traits/is_pointer.hpp>
+#include <boost/detail/workaround.hpp>
+
+namespace boost{
+
+namespace detail{
+
+template <typename T, bool small_>
+struct ct_imp2
+{
+ typedef const T& param_type;
+};
+
+template <typename T>
+struct ct_imp2<T, true>
+{
+ typedef const T param_type;
+};
+
+template <typename T, bool isp, bool b1, bool b2>
+struct ct_imp
+{
+ typedef const T& param_type;
+};
+
+template <typename T, bool isp, bool b2>
+struct ct_imp<T, isp, true, b2>
+{
+ typedef typename ct_imp2<T, sizeof(T) <= sizeof(void*)>::param_type param_type;
+};
+
+template <typename T, bool isp, bool b1>
+struct ct_imp<T, isp, b1, true>
+{
+ typedef typename ct_imp2<T, sizeof(T) <= sizeof(void*)>::param_type param_type;
+};
+
+template <typename T, bool b1, bool b2>
+struct ct_imp<T, true, b1, b2>
+{
+ typedef const T param_type;
+};
+
+}
+
+template <typename T>
+struct call_traits
+{
+public:
+ typedef T value_type;
+ typedef T& reference;
+ typedef const T& const_reference;
+ //
+ // C++ Builder workaround: we should be able to define a compile time
+ // constant and pass that as a single template parameter to ct_imp<T,bool>,
+ // however compiler bugs prevent this - instead pass three bool's to
+ // ct_imp<T,bool,bool,bool> and add an extra partial specialisation
+ // of ct_imp to handle the logic. (JM)
+ typedef typename boost::detail::ct_imp<
+ T,
+ ::boost::is_pointer<T>::value,
+ ::boost::is_arithmetic<T>::value,
+ ::boost::is_enum<T>::value
+ >::param_type param_type;
+};
+
+template <typename T>
+struct call_traits<T&>
+{
+ typedef T& value_type;
+ typedef T& reference;
+ typedef const T& const_reference;
+ typedef T& param_type; // hh removed const
+};
+
+#if BOOST_WORKAROUND( __BORLANDC__, < 0x5A0 )
+// these are illegal specialisations; cv-qualifies applied to
+// references have no effect according to [8.3.2p1],
+// C++ Builder requires them though as it treats cv-qualified
+// references as distinct types...
+template <typename T>
+struct call_traits<T&const>
+{
+ typedef T& value_type;
+ typedef T& reference;
+ typedef const T& const_reference;
+ typedef T& param_type; // hh removed const
+};
+template <typename T>
+struct call_traits<T&volatile>
+{
+ typedef T& value_type;
+ typedef T& reference;
+ typedef const T& const_reference;
+ typedef T& param_type; // hh removed const
+};
+template <typename T>
+struct call_traits<T&const volatile>
+{
+ typedef T& value_type;
+ typedef T& reference;
+ typedef const T& const_reference;
+ typedef T& param_type; // hh removed const
+};
+
+template <typename T>
+struct call_traits< T * >
+{
+ typedef T * value_type;
+ typedef T * & reference;
+ typedef T * const & const_reference;
+ typedef T * const param_type; // hh removed const
+};
+#endif
+#if !defined(BOOST_NO_ARRAY_TYPE_SPECIALIZATIONS)
+template <typename T, std::size_t N>
+struct call_traits<T [N]>
+{
+private:
+ typedef T array_type[N];
+public:
+ // degrades array to pointer:
+ typedef const T* value_type;
+ typedef array_type& reference;
+ typedef const array_type& const_reference;
+ typedef const T* const param_type;
+};
+
+template <typename T, std::size_t N>
+struct call_traits<const T [N]>
+{
+private:
+ typedef const T array_type[N];
+public:
+ // degrades array to pointer:
+ typedef const T* value_type;
+ typedef array_type& reference;
+ typedef const array_type& const_reference;
+ typedef const T* const param_type;
+};
+#endif
+
+}
+
+#endif // BOOST_DETAIL_CALL_TRAITS_HPP
diff --git a/include/boost/detail/compressed_pair.hpp b/include/boost/detail/compressed_pair.hpp
new file mode 100644
index 0000000..5dc21e2
--- /dev/null
+++ b/include/boost/detail/compressed_pair.hpp
@@ -0,0 +1,443 @@
+// (C) Copyright Steve Cleary, Beman Dawes, Howard Hinnant & John Maddock 2000.
+// Use, modification and distribution are subject to the Boost Software License,
+// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt).
+//
+// See http://www.boost.org/libs/utility for most recent version including documentation.
+
+// compressed_pair: pair that "compresses" empty members
+// (see libs/utility/doc/html/compressed_pair.html)
+//
+// JM changes 25 Jan 2004:
+// For the case where T1 == T2 and both are empty, then first() and second()
+// should return different objects.
+// JM changes 25 Jan 2000:
+// Removed default arguments from compressed_pair_switch to get
+// C++ Builder 4 to accept them
+// rewriten swap to get gcc and C++ builder to compile.
+// added partial specialisations for case T1 == T2 to avoid duplicate constructor defs.
+
+#ifndef BOOST_DETAIL_COMPRESSED_PAIR_HPP
+#define BOOST_DETAIL_COMPRESSED_PAIR_HPP
+
+#include <algorithm>
+
+#include <boost/type_traits/remove_cv.hpp>
+#include <boost/type_traits/is_empty.hpp>
+#include <boost/type_traits/is_same.hpp>
+#include <boost/call_traits.hpp>
+
+#ifdef BOOST_MSVC
+# pragma warning(push)
+# pragma warning(disable:4512)
+#endif
+namespace boost
+{
+
+template <class T1, class T2>
+class compressed_pair;
+
+
+// compressed_pair
+
+namespace details
+{
+ // JM altered 26 Jan 2000:
+ template <class T1, class T2, bool IsSame, bool FirstEmpty, bool SecondEmpty>
+ struct compressed_pair_switch;
+
+ template <class T1, class T2>
+ struct compressed_pair_switch<T1, T2, false, false, false>
+ {static const int value = 0;};
+
+ template <class T1, class T2>
+ struct compressed_pair_switch<T1, T2, false, true, true>
+ {static const int value = 3;};
+
+ template <class T1, class T2>
+ struct compressed_pair_switch<T1, T2, false, true, false>
+ {static const int value = 1;};
+
+ template <class T1, class T2>
+ struct compressed_pair_switch<T1, T2, false, false, true>
+ {static const int value = 2;};
+
+ template <class T1, class T2>
+ struct compressed_pair_switch<T1, T2, true, true, true>
+ {static const int value = 4;};
+
+ template <class T1, class T2>
+ struct compressed_pair_switch<T1, T2, true, false, false>
+ {static const int value = 5;};
+
+ template <class T1, class T2, int Version> class compressed_pair_imp;
+
+#ifdef __GNUC__
+ // workaround for GCC (JM):
+ using std::swap;
+#endif
+ //
+ // can't call unqualified swap from within classname::swap
+ // as Koenig lookup rules will find only the classname::swap
+ // member function not the global declaration, so use cp_swap
+ // as a forwarding function (JM):
+ template <typename T>
+ inline void cp_swap(T& t1, T& t2)
+ {
+#ifndef __GNUC__
+ using std::swap;
+#endif
+ swap(t1, t2);
+ }
+
+ // 0 derive from neither
+
+ template <class T1, class T2>
+ class compressed_pair_imp<T1, T2, 0>
+ {
+ public:
+ typedef T1 first_type;
+ typedef T2 second_type;
+ typedef typename call_traits<first_type>::param_type first_param_type;
+ typedef typename call_traits<second_type>::param_type second_param_type;
+ typedef typename call_traits<first_type>::reference first_reference;
+ typedef typename call_traits<second_type>::reference second_reference;
+ typedef typename call_traits<first_type>::const_reference first_const_reference;
+ typedef typename call_traits<second_type>::const_reference second_const_reference;
+
+ compressed_pair_imp() {}
+
+ compressed_pair_imp(first_param_type x, second_param_type y)
+ : first_(x), second_(y) {}
+
+ compressed_pair_imp(first_param_type x)
+ : first_(x) {}
+
+ compressed_pair_imp(second_param_type y)
+ : second_(y) {}
+
+ first_reference first() {return first_;}
+ first_const_reference first() const {return first_;}
+
+ second_reference second() {return second_;}
+ second_const_reference second() const {return second_;}
+
+ void swap(::boost::compressed_pair<T1, T2>& y)
+ {
+ cp_swap(first_, y.first());
+ cp_swap(second_, y.second());
+ }
+ private:
+ first_type first_;
+ second_type second_;
+ };
+
+ // 1 derive from T1
+
+ template <class T1, class T2>
+ class compressed_pair_imp<T1, T2, 1>
+ : protected ::boost::remove_cv<T1>::type
+ {
+ public:
+ typedef T1 first_type;
+ typedef T2 second_type;
+ typedef typename call_traits<first_type>::param_type first_param_type;
+ typedef typename call_traits<second_type>::param_type second_param_type;
+ typedef typename call_traits<first_type>::reference first_reference;
+ typedef typename call_traits<second_type>::reference second_reference;
+ typedef typename call_traits<first_type>::const_reference first_const_reference;
+ typedef typename call_traits<second_type>::const_reference second_const_reference;
+
+ compressed_pair_imp() {}
+
+ compressed_pair_imp(first_param_type x, second_param_type y)
+ : first_type(x), second_(y) {}
+
+ compressed_pair_imp(first_param_type x)
+ : first_type(x) {}
+
+ compressed_pair_imp(second_param_type y)
+ : second_(y) {}
+
+ first_reference first() {return *this;}
+ first_const_reference first() const {return *this;}
+
+ second_reference second() {return second_;}
+ second_const_reference second() const {return second_;}
+
+ void swap(::boost::compressed_pair<T1,T2>& y)
+ {
+ // no need to swap empty base class:
+ cp_swap(second_, y.second());
+ }
+ private:
+ second_type second_;
+ };
+
+ // 2 derive from T2
+
+ template <class T1, class T2>
+ class compressed_pair_imp<T1, T2, 2>
+ : protected ::boost::remove_cv<T2>::type
+ {
+ public:
+ typedef T1 first_type;
+ typedef T2 second_type;
+ typedef typename call_traits<first_type>::param_type first_param_type;
+ typedef typename call_traits<second_type>::param_type second_param_type;
+ typedef typename call_traits<first_type>::reference first_reference;
+ typedef typename call_traits<second_type>::reference second_reference;
+ typedef typename call_traits<first_type>::const_reference first_const_reference;
+ typedef typename call_traits<second_type>::const_reference second_const_reference;
+
+ compressed_pair_imp() {}
+
+ compressed_pair_imp(first_param_type x, second_param_type y)
+ : second_type(y), first_(x) {}
+
+ compressed_pair_imp(first_param_type x)
+ : first_(x) {}
+
+ compressed_pair_imp(second_param_type y)
+ : second_type(y) {}
+
+ first_reference first() {return first_;}
+ first_const_reference first() const {return first_;}
+
+ second_reference second() {return *this;}
+ second_const_reference second() const {return *this;}
+
+ void swap(::boost::compressed_pair<T1,T2>& y)
+ {
+ // no need to swap empty base class:
+ cp_swap(first_, y.first());
+ }
+
+ private:
+ first_type first_;
+ };
+
+ // 3 derive from T1 and T2
+
+ template <class T1, class T2>
+ class compressed_pair_imp<T1, T2, 3>
+ : protected ::boost::remove_cv<T1>::type,
+ protected ::boost::remove_cv<T2>::type
+ {
+ public:
+ typedef T1 first_type;
+ typedef T2 second_type;
+ typedef typename call_traits<first_type>::param_type first_param_type;
+ typedef typename call_traits<second_type>::param_type second_param_type;
+ typedef typename call_traits<first_type>::reference first_reference;
+ typedef typename call_traits<second_type>::reference second_reference;
+ typedef typename call_traits<first_type>::const_reference first_const_reference;
+ typedef typename call_traits<second_type>::const_reference second_const_reference;
+
+ compressed_pair_imp() {}
+
+ compressed_pair_imp(first_param_type x, second_param_type y)
+ : first_type(x), second_type(y) {}
+
+ compressed_pair_imp(first_param_type x)
+ : first_type(x) {}
+
+ compressed_pair_imp(second_param_type y)
+ : second_type(y) {}
+
+ first_reference first() {return *this;}
+ first_const_reference first() const {return *this;}
+
+ second_reference second() {return *this;}
+ second_const_reference second() const {return *this;}
+ //
+ // no need to swap empty bases:
+ void swap(::boost::compressed_pair<T1,T2>&) {}
+ };
+
+ // JM
+ // 4 T1 == T2, T1 and T2 both empty
+ // Originally this did not store an instance of T2 at all
+ // but that led to problems beause it meant &x.first() == &x.second()
+ // which is not true for any other kind of pair, so now we store an instance
+ // of T2 just in case the user is relying on first() and second() returning
+ // different objects (albeit both empty).
+ template <class T1, class T2>
+ class compressed_pair_imp<T1, T2, 4>
+ : protected ::boost::remove_cv<T1>::type
+ {
+ public:
+ typedef T1 first_type;
+ typedef T2 second_type;
+ typedef typename call_traits<first_type>::param_type first_param_type;
+ typedef typename call_traits<second_type>::param_type second_param_type;
+ typedef typename call_traits<first_type>::reference first_reference;
+ typedef typename call_traits<second_type>::reference second_reference;
+ typedef typename call_traits<first_type>::const_reference first_const_reference;
+ typedef typename call_traits<second_type>::const_reference second_const_reference;
+
+ compressed_pair_imp() {}
+
+ compressed_pair_imp(first_param_type x, second_param_type y)
+ : first_type(x), m_second(y) {}
+
+ compressed_pair_imp(first_param_type x)
+ : first_type(x), m_second(x) {}
+
+ first_reference first() {return *this;}
+ first_const_reference first() const {return *this;}
+
+ second_reference second() {return m_second;}
+ second_const_reference second() const {return m_second;}
+
+ void swap(::boost::compressed_pair<T1,T2>&) {}
+ private:
+ T2 m_second;
+ };
+
+ // 5 T1 == T2 and are not empty: //JM
+
+ template <class T1, class T2>
+ class compressed_pair_imp<T1, T2, 5>
+ {
+ public:
+ typedef T1 first_type;
+ typedef T2 second_type;
+ typedef typename call_traits<first_type>::param_type first_param_type;
+ typedef typename call_traits<second_type>::param_type second_param_type;
+ typedef typename call_traits<first_type>::reference first_reference;
+ typedef typename call_traits<second_type>::reference second_reference;
+ typedef typename call_traits<first_type>::const_reference first_const_reference;
+ typedef typename call_traits<second_type>::const_reference second_const_reference;
+
+ compressed_pair_imp() {}
+
+ compressed_pair_imp(first_param_type x, second_param_type y)
+ : first_(x), second_(y) {}
+
+ compressed_pair_imp(first_param_type x)
+ : first_(x), second_(x) {}
+
+ first_reference first() {return first_;}
+ first_const_reference first() const {return first_;}
+
+ second_reference second() {return second_;}
+ second_const_reference second() const {return second_;}
+
+ void swap(::boost::compressed_pair<T1, T2>& y)
+ {
+ cp_swap(first_, y.first());
+ cp_swap(second_, y.second());
+ }
+ private:
+ first_type first_;
+ second_type second_;
+ };
+
+} // details
+
+template <class T1, class T2>
+class compressed_pair
+ : private ::boost::details::compressed_pair_imp<T1, T2,
+ ::boost::details::compressed_pair_switch<
+ T1,
+ T2,
+ ::boost::is_same<typename remove_cv<T1>::type, typename remove_cv<T2>::type>::value,
+ ::boost::is_empty<T1>::value,
+ ::boost::is_empty<T2>::value>::value>
+{
+private:
+ typedef details::compressed_pair_imp<T1, T2,
+ ::boost::details::compressed_pair_switch<
+ T1,
+ T2,
+ ::boost::is_same<typename remove_cv<T1>::type, typename remove_cv<T2>::type>::value,
+ ::boost::is_empty<T1>::value,
+ ::boost::is_empty<T2>::value>::value> base;
+public:
+ typedef T1 first_type;
+ typedef T2 second_type;
+ typedef typename call_traits<first_type>::param_type first_param_type;
+ typedef typename call_traits<second_type>::param_type second_param_type;
+ typedef typename call_traits<first_type>::reference first_reference;
+ typedef typename call_traits<second_type>::reference second_reference;
+ typedef typename call_traits<first_type>::const_reference first_const_reference;
+ typedef typename call_traits<second_type>::const_reference second_const_reference;
+
+ compressed_pair() : base() {}
+ compressed_pair(first_param_type x, second_param_type y) : base(x, y) {}
+ explicit compressed_pair(first_param_type x) : base(x) {}
+ explicit compressed_pair(second_param_type y) : base(y) {}
+
+ first_reference first() {return base::first();}
+ first_const_reference first() const {return base::first();}
+
+ second_reference second() {return base::second();}
+ second_const_reference second() const {return base::second();}
+
+ void swap(compressed_pair& y) { base::swap(y); }
+};
+
+// JM
+// Partial specialisation for case where T1 == T2:
+//
+template <class T>
+class compressed_pair<T, T>
+ : private details::compressed_pair_imp<T, T,
+ ::boost::details::compressed_pair_switch<
+ T,
+ T,
+ ::boost::is_same<typename remove_cv<T>::type, typename remove_cv<T>::type>::value,
+ ::boost::is_empty<T>::value,
+ ::boost::is_empty<T>::value>::value>
+{
+private:
+ typedef details::compressed_pair_imp<T, T,
+ ::boost::details::compressed_pair_switch<
+ T,
+ T,
+ ::boost::is_same<typename remove_cv<T>::type, typename remove_cv<T>::type>::value,
+ ::boost::is_empty<T>::value,
+ ::boost::is_empty<T>::value>::value> base;
+public:
+ typedef T first_type;
+ typedef T second_type;
+ typedef typename call_traits<first_type>::param_type first_param_type;
+ typedef typename call_traits<second_type>::param_type second_param_type;
+ typedef typename call_traits<first_type>::reference first_reference;
+ typedef typename call_traits<second_type>::reference second_reference;
+ typedef typename call_traits<first_type>::const_reference first_const_reference;
+ typedef typename call_traits<second_type>::const_reference second_const_reference;
+
+ compressed_pair() : base() {}
+ compressed_pair(first_param_type x, second_param_type y) : base(x, y) {}
+#if !(defined(__SUNPRO_CC) && (__SUNPRO_CC <= 0x530))
+ explicit
+#endif
+ compressed_pair(first_param_type x) : base(x) {}
+
+ first_reference first() {return base::first();}
+ first_const_reference first() const {return base::first();}
+
+ second_reference second() {return base::second();}
+ second_const_reference second() const {return base::second();}
+
+ void swap(::boost::compressed_pair<T,T>& y) { base::swap(y); }
+};
+
+template <class T1, class T2>
+inline
+void
+swap(compressed_pair<T1, T2>& x, compressed_pair<T1, T2>& y)
+{
+ x.swap(y);
+}
+
+} // boost
+
+#ifdef BOOST_MSVC
+# pragma warning(pop)
+#endif
+
+#endif // BOOST_DETAIL_COMPRESSED_PAIR_HPP
+
diff --git a/include/boost/detail/ob_compressed_pair.hpp b/include/boost/detail/ob_compressed_pair.hpp
new file mode 100644
index 0000000..326e454
--- /dev/null
+++ b/include/boost/detail/ob_compressed_pair.hpp
@@ -0,0 +1,499 @@
+// (C) Copyright Steve Cleary, Beman Dawes, Howard Hinnant & John Maddock 2000.
+// Use, modification and distribution are subject to the Boost Software License,
+// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt).
+//
+// See http://www.boost.org/libs/utility for most recent version including documentation.
+// see libs/utility/compressed_pair.hpp
+//
+/* Release notes:
+ 20 Jan 2001:
+ Fixed obvious bugs (David Abrahams)
+ 07 Oct 2000:
+ Added better single argument constructor support.
+ 03 Oct 2000:
+ Added VC6 support (JM).
+ 23rd July 2000:
+ Additional comments added. (JM)
+ Jan 2000:
+ Original version: this version crippled for use with crippled compilers
+ - John Maddock Jan 2000.
+*/
+
+
+#ifndef BOOST_OB_COMPRESSED_PAIR_HPP
+#define BOOST_OB_COMPRESSED_PAIR_HPP
+
+#include <algorithm>
+#ifndef BOOST_OBJECT_TYPE_TRAITS_HPP
+#include <boost/type_traits/object_traits.hpp>
+#endif
+#ifndef BOOST_SAME_TRAITS_HPP
+#include <boost/type_traits/same_traits.hpp>
+#endif
+#ifndef BOOST_CALL_TRAITS_HPP
+#include <boost/call_traits.hpp>
+#endif
+
+namespace boost
+{
+#ifdef BOOST_MSVC6_MEMBER_TEMPLATES
+//
+// use member templates to emulate
+// partial specialisation. Note that due to
+// problems with overload resolution with VC6
+// each of the compressed_pair versions that follow
+// have one template single-argument constructor
+// in place of two specific constructors:
+//
+
+template <class T1, class T2>
+class compressed_pair;
+
+namespace detail{
+
+template <class A, class T1, class T2>
+struct best_conversion_traits
+{
+ typedef char one;
+ typedef char (&two)[2];
+ static A a;
+ static one test(T1);
+ static two test(T2);
+
+ enum { value = sizeof(test(a)) };
+};
+
+template <int>
+struct init_one;
+
+template <>
+struct init_one<1>
+{
+ template <class A, class T1, class T2>
+ static void init(const A& a, T1* p1, T2*)
+ {
+ *p1 = a;
+ }
+};
+
+template <>
+struct init_one<2>
+{
+ template <class A, class T1, class T2>
+ static void init(const A& a, T1*, T2* p2)
+ {
+ *p2 = a;
+ }
+};
+
+
+// T1 != T2, both non-empty
+template <class T1, class T2>
+class compressed_pair_0
+{
+private:
+ T1 _first;
+ T2 _second;
+public:
+ typedef T1 first_type;
+ typedef T2 second_type;
+ typedef typename call_traits<first_type>::param_type first_param_type;
+ typedef typename call_traits<second_type>::param_type second_param_type;
+ typedef typename call_traits<first_type>::reference first_reference;
+ typedef typename call_traits<second_type>::reference second_reference;
+ typedef typename call_traits<first_type>::const_reference first_const_reference;
+ typedef typename call_traits<second_type>::const_reference second_const_reference;
+
+ compressed_pair_0() : _first(), _second() {}
+ compressed_pair_0(first_param_type x, second_param_type y) : _first(x), _second(y) {}
+ template <class A>
+ explicit compressed_pair_0(const A& val)
+ {
+ init_one<best_conversion_traits<A, T1, T2>::value>::init(val, &_first, &_second);
+ }
+ compressed_pair_0(const ::boost::compressed_pair<T1,T2>& x)
+ : _first(x.first()), _second(x.second()) {}
+
+#if 0
+ compressed_pair_0& operator=(const compressed_pair_0& x) {
+ cout << "assigning compressed pair 0" << endl;
+ _first = x._first;
+ _second = x._second;
+ cout << "finished assigning compressed pair 0" << endl;
+ return *this;
+ }
+#endif
+
+ first_reference first() { return _first; }
+ first_const_reference first() const { return _first; }
+
+ second_reference second() { return _second; }
+ second_const_reference second() const { return _second; }
+
+ void swap(compressed_pair_0& y)
+ {
+ using std::swap;
+ swap(_first, y._first);
+ swap(_second, y._second);
+ }
+};
+
+// T1 != T2, T2 empty
+template <class T1, class T2>
+class compressed_pair_1 : T2
+{
+private:
+ T1 _first;
+public:
+ typedef T1 first_type;
+ typedef T2 second_type;
+ typedef typename call_traits<first_type>::param_type first_param_type;
+ typedef typename call_traits<second_type>::param_type second_param_type;
+ typedef typename call_traits<first_type>::reference first_reference;
+ typedef typename call_traits<second_type>::reference second_reference;
+ typedef typename call_traits<first_type>::const_reference first_const_reference;
+ typedef typename call_traits<second_type>::const_reference second_const_reference;
+
+ compressed_pair_1() : T2(), _first() {}
+ compressed_pair_1(first_param_type x, second_param_type y) : T2(y), _first(x) {}
+
+ template <class A>
+ explicit compressed_pair_1(const A& val)
+ {
+ init_one<best_conversion_traits<A, T1, T2>::value>::init(val, &_first, static_cast<T2*>(this));
+ }
+
+ compressed_pair_1(const ::boost::compressed_pair<T1,T2>& x)
+ : T2(x.second()), _first(x.first()) {}
+
+ first_reference first() { return _first; }
+ first_const_reference first() const { return _first; }
+
+ second_reference second() { return *this; }
+ second_const_reference second() const { return *this; }
+
+ void swap(compressed_pair_1& y)
+ {
+ // no need to swap empty base class:
+ using std::swap;
+ swap(_first, y._first);
+ }
+};
+
+// T1 != T2, T1 empty
+template <class T1, class T2>
+class compressed_pair_2 : T1
+{
+private:
+ T2 _second;
+public:
+ typedef T1 first_type;
+ typedef T2 second_type;
+ typedef typename call_traits<first_type>::param_type first_param_type;
+ typedef typename call_traits<second_type>::param_type second_param_type;
+ typedef typename call_traits<first_type>::reference first_reference;
+ typedef typename call_traits<second_type>::reference second_reference;
+ typedef typename call_traits<first_type>::const_reference first_const_reference;
+ typedef typename call_traits<second_type>::const_reference second_const_reference;
+
+ compressed_pair_2() : T1(), _second() {}
+ compressed_pair_2(first_param_type x, second_param_type y) : T1(x), _second(y) {}
+ template <class A>
+ explicit compressed_pair_2(const A& val)
+ {
+ init_one<best_conversion_traits<A, T1, T2>::value>::init(val, static_cast<T1*>(this), &_second);
+ }
+ compressed_pair_2(const ::boost::compressed_pair<T1,T2>& x)
+ : T1(x.first()), _second(x.second()) {}
+
+#if 0
+ compressed_pair_2& operator=(const compressed_pair_2& x) {
+ cout << "assigning compressed pair 2" << endl;
+ T1::operator=(x);
+ _second = x._second;
+ cout << "finished assigning compressed pair 2" << endl;
+ return *this;
+ }
+#endif
+ first_reference first() { return *this; }
+ first_const_reference first() const { return *this; }
+
+ second_reference second() { return _second; }
+ second_const_reference second() const { return _second; }
+
+ void swap(compressed_pair_2& y)
+ {
+ // no need to swap empty base class:
+ using std::swap;
+ swap(_second, y._second);
+ }
+};
+
+// T1 != T2, both empty
+template <class T1, class T2>
+class compressed_pair_3 : T1, T2
+{
+public:
+ typedef T1 first_type;
+ typedef T2 second_type;
+ typedef typename call_traits<first_type>::param_type first_param_type;
+ typedef typename call_traits<second_type>::param_type second_param_type;
+ typedef typename call_traits<first_type>::reference first_reference;
+ typedef typename call_traits<second_type>::reference second_reference;
+ typedef typename call_traits<first_type>::const_reference first_const_reference;
+ typedef typename call_traits<second_type>::const_reference second_const_reference;
+
+ compressed_pair_3() : T1(), T2() {}
+ compressed_pair_3(first_param_type x, second_param_type y) : T1(x), T2(y) {}
+ template <class A>
+ explicit compressed_pair_3(const A& val)
+ {
+ init_one<best_conversion_traits<A, T1, T2>::value>::init(val, static_cast<T1*>(this), static_cast<T2*>(this));
+ }
+ compressed_pair_3(const ::boost::compressed_pair<T1,T2>& x)
+ : T1(x.first()), T2(x.second()) {}
+
+ first_reference first() { return *this; }
+ first_const_reference first() const { return *this; }
+
+ second_reference second() { return *this; }
+ second_const_reference second() const { return *this; }
+
+ void swap(compressed_pair_3& y)
+ {
+ // no need to swap empty base classes:
+ }
+};
+
+// T1 == T2, and empty
+template <class T1, class T2>
+class compressed_pair_4 : T1
+{
+public:
+ typedef T1 first_type;
+ typedef T2 second_type;
+ typedef typename call_traits<first_type>::param_type first_param_type;
+ typedef typename call_traits<second_type>::param_type second_param_type;
+ typedef typename call_traits<first_type>::reference first_reference;
+ typedef typename call_traits<second_type>::reference second_reference;
+ typedef typename call_traits<first_type>::const_reference first_const_reference;
+ typedef typename call_traits<second_type>::const_reference second_const_reference;
+
+ compressed_pair_4() : T1() {}
+ compressed_pair_4(first_param_type x, second_param_type y) : T1(x), m_second(y) {}
+ // only one single argument constructor since T1 == T2
+ explicit compressed_pair_4(first_param_type x) : T1(x), m_second(x) {}
+ compressed_pair_4(const ::boost::compressed_pair<T1,T2>& x)
+ : T1(x.first()), m_second(x.second()) {}
+
+ first_reference first() { return *this; }
+ first_const_reference first() const { return *this; }
+
+ second_reference second() { return m_second; }
+ second_const_reference second() const { return m_second; }
+
+ void swap(compressed_pair_4& y)
+ {
+ // no need to swap empty base classes:
+ }
+private:
+ T2 m_second;
+};
+
+// T1 == T2, not empty
+template <class T1, class T2>
+class compressed_pair_5
+{
+private:
+ T1 _first;
+ T2 _second;
+public:
+ typedef T1 first_type;
+ typedef T2 second_type;
+ typedef typename call_traits<first_type>::param_type first_param_type;
+ typedef typename call_traits<second_type>::param_type second_param_type;
+ typedef typename call_traits<first_type>::reference first_reference;
+ typedef typename call_traits<second_type>::reference second_reference;
+ typedef typename call_traits<first_type>::const_reference first_const_reference;
+ typedef typename call_traits<second_type>::const_reference second_const_reference;
+
+ compressed_pair_5() : _first(), _second() {}
+ compressed_pair_5(first_param_type x, second_param_type y) : _first(x), _second(y) {}
+ // only one single argument constructor since T1 == T2
+ explicit compressed_pair_5(first_param_type x) : _first(x), _second(x) {}
+ compressed_pair_5(const ::boost::compressed_pair<T1,T2>& c)
+ : _first(c.first()), _second(c.second()) {}
+
+ first_reference first() { return _first; }
+ first_const_reference first() const { return _first; }
+
+ second_reference second() { return _second; }
+ second_const_reference second() const { return _second; }
+
+ void swap(compressed_pair_5& y)
+ {
+ using std::swap;
+ swap(_first, y._first);
+ swap(_second, y._second);
+ }
+};
+
+template <bool e1, bool e2, bool same>
+struct compressed_pair_chooser
+{
+ template <class T1, class T2>
+ struct rebind
+ {
+ typedef compressed_pair_0<T1, T2> type;
+ };
+};
+
+template <>
+struct compressed_pair_chooser<false, true, false>
+{
+ template <class T1, class T2>
+ struct rebind
+ {
+ typedef compressed_pair_1<T1, T2> type;
+ };
+};
+
+template <>
+struct compressed_pair_chooser<true, false, false>
+{
+ template <class T1, class T2>
+ struct rebind
+ {
+ typedef compressed_pair_2<T1, T2> type;
+ };
+};
+
+template <>
+struct compressed_pair_chooser<true, true, false>
+{
+ template <class T1, class T2>
+ struct rebind
+ {
+ typedef compressed_pair_3<T1, T2> type;
+ };
+};
+
+template <>
+struct compressed_pair_chooser<true, true, true>
+{
+ template <class T1, class T2>
+ struct rebind
+ {
+ typedef compressed_pair_4<T1, T2> type;
+ };
+};
+
+template <>
+struct compressed_pair_chooser<false, false, true>
+{
+ template <class T1, class T2>
+ struct rebind
+ {
+ typedef compressed_pair_5<T1, T2> type;
+ };
+};
+
+template <class T1, class T2>
+struct compressed_pair_traits
+{
+private:
+ typedef compressed_pair_chooser<is_empty<T1>::value, is_empty<T2>::value, is_same<T1,T2>::value> chooser;
+ typedef typename chooser::template rebind<T1, T2> bound_type;
+public:
+ typedef typename bound_type::type type;
+};
+
+} // namespace detail
+
+template <class T1, class T2>
+class compressed_pair : public detail::compressed_pair_traits<T1, T2>::type
+{
+private:
+ typedef typename detail::compressed_pair_traits<T1, T2>::type base_type;
+public:
+ typedef T1 first_type;
+ typedef T2 second_type;
+ typedef typename call_traits<first_type>::param_type first_param_type;
+ typedef typename call_traits<second_type>::param_type second_param_type;
+ typedef typename call_traits<first_type>::reference first_reference;
+ typedef typename call_traits<second_type>::reference second_reference;
+ typedef typename call_traits<first_type>::const_reference first_const_reference;
+ typedef typename call_traits<second_type>::const_reference second_const_reference;
+
+ compressed_pair() : base_type() {}
+ compressed_pair(first_param_type x, second_param_type y) : base_type(x, y) {}
+ template <class A>
+ explicit compressed_pair(const A& x) : base_type(x){}
+
+ first_reference first() { return base_type::first(); }
+ first_const_reference first() const { return base_type::first(); }
+
+ second_reference second() { return base_type::second(); }
+ second_const_reference second() const { return base_type::second(); }
+};
+
+template <class T1, class T2>
+inline void swap(compressed_pair<T1, T2>& x, compressed_pair<T1, T2>& y)
+{
+ x.swap(y);
+}
+
+#else
+// no partial specialisation, no member templates:
+
+template <class T1, class T2>
+class compressed_pair
+{
+private:
+ T1 _first;
+ T2 _second;
+public:
+ typedef T1 first_type;
+ typedef T2 second_type;
+ typedef typename call_traits<first_type>::param_type first_param_type;
+ typedef typename call_traits<second_type>::param_type second_param_type;
+ typedef typename call_traits<first_type>::reference first_reference;
+ typedef typename call_traits<second_type>::reference second_reference;
+ typedef typename call_traits<first_type>::const_reference first_const_reference;
+ typedef typename call_traits<second_type>::const_reference second_const_reference;
+
+ compressed_pair() : _first(), _second() {}
+ compressed_pair(first_param_type x, second_param_type y) : _first(x), _second(y) {}
+ explicit compressed_pair(first_param_type x) : _first(x), _second() {}
+ // can't define this in case T1 == T2:
+ // explicit compressed_pair(second_param_type y) : _first(), _second(y) {}
+
+ first_reference first() { return _first; }
+ first_const_reference first() const { return _first; }
+
+ second_reference second() { return _second; }
+ second_const_reference second() const { return _second; }
+
+ void swap(compressed_pair& y)
+ {
+ using std::swap;
+ swap(_first, y._first);
+ swap(_second, y._second);
+ }
+};
+
+template <class T1, class T2>
+inline void swap(compressed_pair<T1, T2>& x, compressed_pair<T1, T2>& y)
+{
+ x.swap(y);
+}
+
+#endif
+
+} // boost
+
+#endif // BOOST_OB_COMPRESSED_PAIR_HPP
+
+
+