author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 11 Jun 2010 15:26:22 +0300 | |
changeset 34 | 5fae379060a7 |
parent 0 | e4d67989cc36 |
permissions | -rw-r--r-- |
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/* |
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* |
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* Copyright (c) 1996,1997 |
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* Silicon Graphics Computer Systems, Inc. |
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* |
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* Copyright (c) 1997 |
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* Moscow Center for SPARC Technology |
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* |
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* Copyright (c) 1999 |
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* Boris Fomitchev |
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* |
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* This material is provided "as is", with absolutely no warranty expressed |
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* or implied. Any use is at your own risk. |
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* |
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* Permission to use or copy this software for any purpose is hereby granted |
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* without fee, provided the above notices are retained on all copies. |
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* Permission to modify the code and to distribute modified code is granted, |
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* provided the above notices are retained, and a notice that the code was |
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* modified is included with the above copyright notice. |
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* |
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*/ |
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#ifndef _STLP_TYPE_TRAITS_H |
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#define _STLP_TYPE_TRAITS_H |
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/* |
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This header file provides a framework for allowing compile time dispatch |
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based on type attributes. This is useful when writing template code. |
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For example, when making a copy of an array of an unknown type, it helps |
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to know if the type has a trivial copy constructor or not, to help decide |
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if a memcpy can be used. |
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The class template __type_traits provides a series of typedefs each of |
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which is either __true_type or __false_type. The argument to |
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__type_traits can be any type. The typedefs within this template will |
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attain their correct values by one of these means: |
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1. The general instantiation contain conservative values which work |
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for all types. |
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2. Specializations may be declared to make distinctions between types. |
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3. Some compilers (such as the Silicon Graphics N32 and N64 compilers) |
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will automatically provide the appropriate specializations for all |
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types. |
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EXAMPLE: |
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//Copy an array of elements which have non-trivial copy constructors |
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template <class T> void copy(T* source, T* destination, int n, __false_type); |
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//Copy an array of elements which have trivial copy constructors. Use memcpy. |
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template <class T> void copy(T* source, T* destination, int n, __true_type); |
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//Copy an array of any type by using the most efficient copy mechanism |
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template <class T> inline void copy(T* source,T* destination,int n) { |
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copy(source, destination, n, |
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typename __type_traits<T>::has_trivial_copy_constructor()); |
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} |
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*/ |
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#ifdef __WATCOMC__ |
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# include <stl/_cwchar.h> |
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#endif |
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#ifndef _STLP_TYPE_MANIPS_H |
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# include <stl/type_manips.h> |
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#endif |
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#ifdef _STLP_USE_BOOST_SUPPORT |
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# include <stl/boost_type_traits.h> |
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# include <boost/type_traits/add_reference.hpp> |
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# include <boost/type_traits/add_const.hpp> |
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#endif /* _STLP_USE_BOOST_SUPPORT */ |
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_STLP_BEGIN_NAMESPACE |
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#if !defined (_STLP_USE_BOOST_SUPPORT) |
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// The following could be written in terms of numeric_limits. |
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// We're doing it separately to reduce the number of dependencies. |
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template <class _Tp> struct _IsIntegral |
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{ typedef __false_type _Ret; }; |
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# ifndef _STLP_NO_BOOL |
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_STLP_TEMPLATE_NULL struct _IsIntegral<bool> |
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{ typedef __true_type _Ret; }; |
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# endif /* _STLP_NO_BOOL */ |
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_STLP_TEMPLATE_NULL struct _IsIntegral<char> |
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{ typedef __true_type _Ret; }; |
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# ifndef _STLP_NO_SIGNED_BUILTINS |
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_STLP_TEMPLATE_NULL struct _IsIntegral<signed char> |
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{ typedef __true_type _Ret; }; |
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# endif |
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_STLP_TEMPLATE_NULL struct _IsIntegral<unsigned char> |
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{ typedef __true_type _Ret; }; |
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# if defined ( _STLP_HAS_WCHAR_T ) && ! defined (_STLP_WCHAR_T_IS_USHORT) |
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_STLP_TEMPLATE_NULL struct _IsIntegral<wchar_t> |
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{ typedef __true_type _Ret; }; |
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# endif /* _STLP_HAS_WCHAR_T */ |
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_STLP_TEMPLATE_NULL struct _IsIntegral<short> |
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{ typedef __true_type _Ret; }; |
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_STLP_TEMPLATE_NULL struct _IsIntegral<unsigned short> |
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{ typedef __true_type _Ret; }; |
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_STLP_TEMPLATE_NULL struct _IsIntegral<int> |
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{ typedef __true_type _Ret; }; |
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_STLP_TEMPLATE_NULL struct _IsIntegral<unsigned int> |
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{ typedef __true_type _Ret; }; |
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_STLP_TEMPLATE_NULL struct _IsIntegral<long> |
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{ typedef __true_type _Ret; }; |
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_STLP_TEMPLATE_NULL struct _IsIntegral<unsigned long> |
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{ typedef __true_type _Ret; }; |
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# ifdef _STLP_LONG_LONG |
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_STLP_TEMPLATE_NULL struct _IsIntegral<_STLP_LONG_LONG> |
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{ typedef __true_type _Ret; }; |
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_STLP_TEMPLATE_NULL struct _IsIntegral<unsigned _STLP_LONG_LONG> |
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{ typedef __true_type _Ret; }; |
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# endif /* _STLP_LONG_LONG */ |
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template <class _Tp> struct _IsRational |
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{ typedef __false_type _Ret; }; |
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_STLP_TEMPLATE_NULL struct _IsRational<float> |
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{ typedef __true_type _Ret; }; |
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_STLP_TEMPLATE_NULL struct _IsRational<double> |
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{ typedef __true_type _Ret; }; |
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# if !defined ( _STLP_NO_LONG_DOUBLE ) |
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_STLP_TEMPLATE_NULL struct _IsRational<long double> |
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{ typedef __true_type _Ret; }; |
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# endif |
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// Forward declarations. |
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template <class _Tp> struct __type_traits; |
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template <class _IsPOD> struct __type_traits_aux { |
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typedef __false_type has_trivial_default_constructor; |
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typedef __false_type has_trivial_copy_constructor; |
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typedef __false_type has_trivial_assignment_operator; |
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typedef __false_type has_trivial_destructor; |
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typedef __false_type is_POD_type; |
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}; |
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_STLP_TEMPLATE_NULL |
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struct __type_traits_aux<__false_type> { |
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typedef __false_type has_trivial_default_constructor; |
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typedef __false_type has_trivial_copy_constructor; |
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typedef __false_type has_trivial_assignment_operator; |
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typedef __false_type has_trivial_destructor; |
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typedef __false_type is_POD_type; |
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}; |
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_STLP_TEMPLATE_NULL |
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struct __type_traits_aux<__true_type> { |
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typedef __true_type has_trivial_default_constructor; |
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typedef __true_type has_trivial_copy_constructor; |
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typedef __true_type has_trivial_assignment_operator; |
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typedef __true_type has_trivial_destructor; |
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typedef __true_type is_POD_type; |
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}; |
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template <class _Tp> |
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struct _IsRef { |
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typedef __false_type _Ret; |
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}; |
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# if defined (_STLP_SIMULATE_PARTIAL_SPEC_FOR_TYPE_TRAITS) |
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/* |
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* Boris : simulation technique is used here according to Adobe Open Source License Version 1.0. |
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* Copyright 2000 Adobe Systems Incorporated and others. All rights reserved. |
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* Authors: Mat Marcus and Jesse Jones |
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* The original version of this source code may be found at |
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* http://opensource.adobe.com. |
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*/ |
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struct _PointerShim { |
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/* |
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* Since the compiler only allows at most one non-trivial |
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* implicit conversion we can make use of a shim class to |
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* be sure that IsPtr below doesn't accept classes with |
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* implicit pointer conversion operators |
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*/ |
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_PointerShim(const volatile void*); // no implementation |
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}; |
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// These are the discriminating functions |
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char _STLP_CALL _IsP(bool, _PointerShim); // no implementation is required |
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char* _STLP_CALL _IsP(bool, ...); // no implementation is required |
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|
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template <class _Tp> |
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struct _IsPtr { |
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/* |
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* This template meta function takes a type T |
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* and returns true exactly when T is a pointer. |
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* One can imagine meta-functions discriminating on |
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* other criteria. |
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*/ |
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static _Tp& __null_rep(); |
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enum { _Ptr = (sizeof(_IsP(false,__null_rep())) == sizeof(char)) }; |
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typedef typename __bool2type<_Ptr>::_Ret _Ret; |
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}; |
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// we make general case dependant on the fact the type is actually a pointer. |
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template <class _Tp> |
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struct __type_traits : __type_traits_aux<typename _IsPtr<_Tp>::_Ret> {}; |
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# else /* _STLP_SIMULATE_PARTIAL_SPEC_FOR_TYPE_TRAITS */ |
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template <class _Tp> struct _IsPtr { |
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typedef __false_type _Ret; |
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}; |
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template <class _Tp> |
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struct __type_traits { |
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typedef __true_type this_dummy_member_must_be_first; |
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/* Do not remove this member. It informs a compiler which |
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automatically specializes __type_traits that this |
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__type_traits template is special. It just makes sure that |
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things work if an implementation is using a template |
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called __type_traits for something unrelated. */ |
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|
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/* The following restrictions should be observed for the sake of |
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compilers which automatically produce type specific specializations |
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of this class: |
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- You may reorder the members below if you wish |
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- You may remove any of the members below if you wish |
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- You must not rename members without making the corresponding |
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name change in the compiler |
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- Members you add will be treated like regular members unless |
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|
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you add the appropriate support in the compiler. */ |
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# if !defined (_STLP_HAS_TYPE_TRAITS_INTRINSICS) |
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typedef __false_type has_trivial_default_constructor; |
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typedef __false_type has_trivial_copy_constructor; |
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typedef __false_type has_trivial_assignment_operator; |
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typedef __false_type has_trivial_destructor; |
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typedef __false_type is_POD_type; |
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# else |
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typedef typename __bool2type<_STLP_HAS_TRIVIAL_CONSTRUCTOR(_Tp)>::_Ret has_trivial_default_constructor; |
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typedef typename __bool2type<_STLP_HAS_TRIVIAL_COPY(_Tp)>::_Ret has_trivial_copy_constructor; |
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typedef typename __bool2type<_STLP_HAS_TRIVIAL_ASSIGN(_Tp)>::_Ret has_trivial_assignment_operator; |
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typedef typename __bool2type<_STLP_HAS_TRIVIAL_DESTRUCTOR(_Tp)>::_Ret has_trivial_destructor; |
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typedef typename __bool2type<_STLP_IS_POD(_Tp)>::_Ret is_POD_type; |
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# endif |
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}; |
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# if defined (_STLP_CLASS_PARTIAL_SPECIALIZATION) |
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template <class _Tp> struct _IsPtr<_Tp*> |
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{ typedef __true_type _Ret; }; |
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template <class _Tp> struct _IsRef<_Tp&> |
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{ typedef __true_type _Ret; }; |
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|
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template <class _Tp> struct __type_traits<_Tp*> : __type_traits_aux<__true_type> |
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{}; |
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# endif /* _STLP_CLASS_PARTIAL_SPECIALIZATION */ |
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# endif /* _STLP_SIMULATE_PARTIAL_SPEC_FOR_TYPE_TRAITS */ |
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|
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// Provide some specializations. This is harmless for compilers that |
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// have built-in __types_traits support, and essential for compilers |
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// that don't. |
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# if !defined (_STLP_QUALIFIED_SPECIALIZATION_BUG) |
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# define _STLP_DEFINE_TYPE_TRAITS_FOR(Type) \ |
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_STLP_TEMPLATE_NULL struct __type_traits< Type > : __type_traits_aux<__true_type> {}; \ |
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_STLP_TEMPLATE_NULL struct __type_traits< const Type > : __type_traits_aux<__true_type> {}; \ |
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_STLP_TEMPLATE_NULL struct __type_traits< volatile Type > : __type_traits_aux<__true_type> {}; \ |
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_STLP_TEMPLATE_NULL struct __type_traits< const volatile Type > : __type_traits_aux<__true_type> {} |
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# else |
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# define _STLP_DEFINE_TYPE_TRAITS_FOR(Type) \ |
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_STLP_TEMPLATE_NULL struct __type_traits< Type > : __type_traits_aux<__true_type> {}; |
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# endif |
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|
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# ifndef _STLP_NO_BOOL |
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_STLP_DEFINE_TYPE_TRAITS_FOR(bool); |
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# endif /* _STLP_NO_BOOL */ |
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_STLP_DEFINE_TYPE_TRAITS_FOR(char); |
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# ifndef _STLP_NO_SIGNED_BUILTINS |
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_STLP_DEFINE_TYPE_TRAITS_FOR(signed char); |
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# endif |
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_STLP_DEFINE_TYPE_TRAITS_FOR(unsigned char); |
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# if defined ( _STLP_HAS_WCHAR_T ) && ! defined (_STLP_WCHAR_T_IS_USHORT) |
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_STLP_DEFINE_TYPE_TRAITS_FOR(wchar_t); |
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# endif /* _STLP_HAS_WCHAR_T */ |
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|
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_STLP_DEFINE_TYPE_TRAITS_FOR(short); |
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_STLP_DEFINE_TYPE_TRAITS_FOR(unsigned short); |
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_STLP_DEFINE_TYPE_TRAITS_FOR(int); |
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_STLP_DEFINE_TYPE_TRAITS_FOR(unsigned int); |
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_STLP_DEFINE_TYPE_TRAITS_FOR(long); |
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_STLP_DEFINE_TYPE_TRAITS_FOR(unsigned long); |
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# ifdef _STLP_LONG_LONG |
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_STLP_DEFINE_TYPE_TRAITS_FOR(_STLP_LONG_LONG); |
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_STLP_DEFINE_TYPE_TRAITS_FOR(unsigned _STLP_LONG_LONG); |
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# endif /* _STLP_LONG_LONG */ |
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_STLP_DEFINE_TYPE_TRAITS_FOR(float); |
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_STLP_DEFINE_TYPE_TRAITS_FOR(double); |
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|
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# if !defined ( _STLP_NO_LONG_DOUBLE ) |
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_STLP_DEFINE_TYPE_TRAITS_FOR(long double); |
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# endif |
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#if defined (_STLP_CLASS_PARTIAL_SPECIALIZATION) |
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template <class _ArePtrs, class _Src, class _Dst> |
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struct _IsCVConvertibleIf |
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{ typedef typename _IsCVConvertible<_Src, _Dst>::_Ret _Ret; }; |
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|
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template <class _Src, class _Dst> |
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struct _IsCVConvertibleIf<__false_type, _Src, _Dst> |
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{ typedef __false_type _Ret; }; |
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#else |
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# if defined (_STLP_MEMBER_TEMPLATE_CLASSES) |
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template <class _ArePtrs> |
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struct _IsCVConvertibleIfAux { |
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template <class _Src, class _Dst> |
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struct _In |
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{ typedef typename _IsCVConvertible<_Src, _Dst>::_Ret _Ret; }; |
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}; |
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|
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_STLP_TEMPLATE_NULL |
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struct _IsCVConvertibleIfAux<__false_type> { |
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template <class _Src, class _Dst> |
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struct _In |
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{ typedef __false_type _Ret; }; |
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}; |
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|
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template <class _ArePtrs, class _Src, class _Dst> |
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struct _IsCVConvertibleIf { |
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typedef typename _IsCVConvertibleIfAux<_ArePtrs>::_STLP_TEMPLATE _In<_Src, _Dst>::_Ret _Ret; |
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}; |
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# else |
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/* default behavior: we prefer to miss an optimization rather than taking the risk of |
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* a compilation error if playing with types with exotic memory alignment. |
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*/ |
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template <class _ArePtrs, class _Src, class _Dst> |
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struct _IsCVConvertibleIf |
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{ typedef __false_type _Ret; }; |
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# endif |
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#endif |
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|
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template <class _Src, class _Dst> |
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struct _TrivialNativeTypeCopy { |
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typedef typename _IsPtr<_Src>::_Ret _Ptr1; |
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typedef typename _IsPtr<_Dst>::_Ret _Ptr2; |
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typedef typename _Land2<_Ptr1, _Ptr2>::_Ret _BothPtrs; |
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typedef typename _IsCVConvertibleIf<_BothPtrs, _Src, _Dst>::_Ret _Convertible; |
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typedef typename _Land2<_BothPtrs, _Convertible>::_Ret _Trivial1; |
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|
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typedef typename __bool2type<(sizeof(_Src) == sizeof(_Dst))>::_Ret _SameSize; |
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|
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typedef typename _IsIntegral<_Src>::_Ret _Int1; |
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typedef typename _IsIntegral<_Dst>::_Ret _Int2; |
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typedef typename _Land2<_Int1, _Int2>::_Ret _BothInts; |
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|
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typedef typename _IsRational<_Src>::_Ret _Rat1; |
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typedef typename _IsRational<_Dst>::_Ret _Rat2; |
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typedef typename _Land2<_Rat1, _Rat2>::_Ret _BothRats; |
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|
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typedef typename _Lor2<_BothInts, _BothRats>::_Ret _BothNatives; |
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typedef typename _Land2<_BothNatives, _SameSize>::_Ret _Trivial2; |
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|
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typedef typename _Lor2<_Trivial1, _Trivial2>::_Ret _Ret; |
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}; |
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|
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template <class _Src, class _Dst> |
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struct _TrivialCopy { |
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typedef typename _TrivialNativeTypeCopy<_Src, _Dst>::_Ret _NativeRet; |
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|
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#if !defined (__BORLANDC__) || (__BORLANDC__ != 0x560) |
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typedef typename __type_traits<_Src>::has_trivial_assignment_operator _Tr1; |
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#else |
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typedef typename _UnConstPtr<_Src*>::_Type _Tp3; |
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typedef typename __type_traits<_Tp3>::has_trivial_assignment_operator _Tr1; |
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#endif |
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typedef typename _AreSameUnCVTypes<_Src, _Dst>::_Ret _Tr2; |
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typedef typename _Land2<_Tr1, _Tr2>::_Ret _UserRet; |
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|
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typedef typename _Lor2<_NativeRet, _UserRet>::_Ret _Ret; |
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static _Ret _Answer() { return _Ret(); } |
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}; |
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|
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template <class _Src, class _Dst> |
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struct _TrivialUCopy { |
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typedef typename _TrivialNativeTypeCopy<_Src, _Dst>::_Ret _NativeRet; |
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|
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#if !defined (__BORLANDC__) || (__BORLANDC__ != 0x560) |
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typedef typename __type_traits<_Src>::has_trivial_copy_constructor _Tr1; |
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#else |
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typedef typename _UnConstPtr<_Src*>::_Type _Tp3; |
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typedef typename __type_traits<_Tp3>::has_trivial_copy_constructor _Tr1; |
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#endif |
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typedef typename _AreSameUnCVTypes<_Src, _Dst>::_Ret _Tr2; |
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typedef typename _Land2<_Tr1, _Tr2>::_Ret _UserRet; |
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|
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406 |
typedef typename _Lor2<_NativeRet, _UserRet>::_Ret _Ret; |
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|
407 |
static _Ret _Answer() { return _Ret(); } |
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Revision: 201002
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|
408 |
}; |
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|
409 |
|
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|
410 |
template <class _Tp> |
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Revision: 201002
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|
411 |
struct _DefaultZeroValue { |
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Revision: 201002
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|
412 |
typedef typename _IsIntegral<_Tp>::_Ret _Tr1; |
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Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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|
413 |
typedef typename _IsRational<_Tp>::_Ret _Tr2; |
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Revision: 201002
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parents:
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|
414 |
typedef typename _IsPtr<_Tp>::_Ret _Tr3; |
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Revision: 201002
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|
415 |
typedef typename _Lor3<_Tr1, _Tr2, _Tr3>::_Ret _Ret; |
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Revision: 201002
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diff
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|
416 |
}; |
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|
417 |
|
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|
418 |
template <class _Tp> |
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Revision: 201002
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|
419 |
struct _TrivialInit { |
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|
420 |
#if !defined (__BORLANDC__) || (__BORLANDC__ != 0x560) |
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Revision: 201002
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diff
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|
421 |
typedef typename __type_traits<_Tp>::has_trivial_default_constructor _Tr1; |
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|
422 |
#else |
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|
423 |
typedef typename _UnConstPtr<_Tp*>::_Type _Tp1; |
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|
424 |
typedef typename __type_traits<_Tp1>::has_trivial_copy_constructor _Tr1; |
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Revision: 201002
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|
425 |
#endif |
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Revision: 201002
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|
426 |
typedef typename _DefaultZeroValue<_Tp>::_Ret _Tr2; |
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Revision: 201002
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|
427 |
typedef typename _Not<_Tr2>::_Ret _Tr3; |
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Revision: 201002
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|
428 |
typedef typename _Land2<_Tr1, _Tr3>::_Ret _Ret; |
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|
429 |
static _Ret _Answer() { return _Ret(); } |
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|
430 |
}; |
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Revision: 201002
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|
431 |
|
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Revision: 201002
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parents:
diff
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|
432 |
#endif /* !_STLP_USE_BOOST_SUPPORT */ |
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|
433 |
|
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|
434 |
template <class _Tp> |
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Revision: 201002
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|
435 |
struct _IsPtrType { |
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Revision: 201002
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|
436 |
typedef typename _IsPtr<_Tp>::_Ret _Type; |
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Revision: 201002
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|
437 |
static _Type _Ret() { return _Type(); } |
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Revision: 201002
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|
438 |
}; |
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Revision: 201002
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|
439 |
|
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Revision: 201002
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|
440 |
template <class _Tp> |
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Revision: 201002
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|
441 |
struct _IsRefType { |
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Revision: 201002
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|
442 |
typedef typename _IsRef<_Tp>::_Ret _Type; |
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Revision: 201002
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|
443 |
static _Type _Ret() { return _Type();} |
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|
444 |
}; |
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Revision: 201002
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|
445 |
|
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Revision: 201002
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|
446 |
template <class _Tp> |
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Revision: 201002
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|
447 |
struct __call_traits { |
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Revision: 201002
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|
448 |
#if defined (_STLP_USE_BOOST_SUPPORT) && !defined (_STLP_NO_EXTENSIONS) |
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Revision: 201002
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|
449 |
typedef typename __select< ::boost::is_reference<_Tp>::value, |
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Revision: 201002
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|
450 |
_Tp, typename ::boost::add_reference< typename ::boost::add_const<_Tp>::type >::type>::_Ret param_type; |
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|
451 |
#else |
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Revision: 201002
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|
452 |
typedef const _Tp& param_type; |
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|
453 |
#endif /* _STLP_USE_BOOST_SUPPORT */ |
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Revision: 201002
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|
454 |
}; |
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|
455 |
|
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Revision: 201002
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|
456 |
#if !defined (_STLP_USE_BOOST_SUPPORT) && !defined (_STLP_NO_EXTENSIONS) && defined (_STLP_CLASS_PARTIAL_SPECIALIZATION) |
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|
457 |
template <class _Tp> |
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Revision: 201002
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|
458 |
struct __call_traits<_Tp&> |
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Revision: 201002
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|
459 |
{ typedef _Tp& param_type; }; |
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|
460 |
#endif |
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|
461 |
|
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|
462 |
template <class _Tp1, class _Tp2> |
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|
463 |
struct _BothPtrType { |
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Revision: 201002
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|
464 |
typedef typename _IsPtr<_Tp1>::_Ret _IsPtr1; |
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|
465 |
typedef typename _IsPtr<_Tp2>::_Ret _IsPtr2; |
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Revision: 201002
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|
466 |
|
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Revision: 201002
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|
467 |
typedef typename _Land2<_IsPtr1, _IsPtr2>::_Ret _Ret; |
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Revision: 201002
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|
468 |
static _Ret _Answer() { return _Ret(); } |
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Revision: 201002
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|
469 |
}; |
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Revision: 201002
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|
470 |
|
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Revision: 201002
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diff
changeset
|
471 |
template <class _Tp1, class _Tp2, class _IsRef1, class _IsRef2> |
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Revision: 201002
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parents:
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|
472 |
struct _OKToSwap { |
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Revision: 201002
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|
473 |
typedef typename _AreSameUnCVTypes<_Tp1, _Tp2>::_Ret _Same; |
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Revision: 201002
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|
474 |
typedef typename _Land3<_Same, _IsRef1, _IsRef2>::_Ret _Type; |
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Revision: 201002
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|
475 |
static _Type _Answer() { return _Type(); } |
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Revision: 201002
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|
476 |
}; |
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Revision: 201002
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|
477 |
|
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Revision: 201002
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|
478 |
template <class _Tp1, class _Tp2, class _IsRef1, class _IsRef2> |
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Revision: 201002
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|
479 |
inline _OKToSwap<_Tp1, _Tp2, _IsRef1, _IsRef2> |
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Revision: 201002
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|
480 |
_IsOKToSwap(_Tp1*, _Tp2*, const _IsRef1&, const _IsRef2&) |
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Revision: 201002
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diff
changeset
|
481 |
{ return _OKToSwap<_Tp1, _Tp2, _IsRef1, _IsRef2>(); } |
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Revision: 201002
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changeset
|
482 |
|
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Revision: 201002
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|
483 |
template <class _Src, class _Dst> |
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Revision: 201002
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|
484 |
inline _TrivialCopy<_Src, _Dst> _UseTrivialCopy(_Src*, _Dst*) |
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Revision: 201002
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|
485 |
{ return _TrivialCopy<_Src, _Dst>(); } |
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Revision: 201002
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|
486 |
|
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Revision: 201002
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|
487 |
template <class _Src, class _Dst> |
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Revision: 201002
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|
488 |
inline _TrivialUCopy<_Src, _Dst> _UseTrivialUCopy(_Src*, _Dst*) |
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Revision: 201002
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|
489 |
{ return _TrivialUCopy<_Src, _Dst>(); } |
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Revision: 201002
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|
490 |
|
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Revision: 201002
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|
491 |
template <class _Tp> |
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Revision: 201002
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|
492 |
inline _TrivialInit<_Tp> _UseTrivialInit(_Tp*) |
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Revision: 201002
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diff
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|
493 |
{ return _TrivialInit<_Tp>(); } |
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Revision: 201002
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|
494 |
|
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Revision: 201002
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|
495 |
template <class _Tp> |
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Revision: 201002
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|
496 |
struct _IsPOD { |
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Revision: 201002
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diff
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|
497 |
typedef typename __type_traits<_Tp>::is_POD_type _Type; |
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Revision: 201002
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diff
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|
498 |
static _Type _Answer() { return _Type(); } |
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Revision: 201002
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diff
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|
499 |
}; |
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Revision: 201002
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|
500 |
|
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Revision: 201002
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parents:
diff
changeset
|
501 |
template <class _Tp> |
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Revision: 201002
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diff
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|
502 |
inline _IsPOD<_Tp> _Is_POD(_Tp*) |
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Revision: 201002
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diff
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|
503 |
{ return _IsPOD<_Tp>(); } |
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Revision: 201002
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diff
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|
504 |
|
e4d67989cc36
Revision: 201002
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|
505 |
template <class _Tp> |
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Revision: 201002
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diff
changeset
|
506 |
struct _DefaultZeroValueQuestion { |
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Revision: 201002
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parents:
diff
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|
507 |
typedef typename _DefaultZeroValue<_Tp>::_Ret _Ret; |
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Revision: 201002
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parents:
diff
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|
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static _Ret _Answer() { return _Ret(); } |
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}; |
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|
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511 |
template <class _Tp> |
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inline _DefaultZeroValueQuestion<_Tp> _HasDefaultZeroValue(_Tp*) |
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{ return _DefaultZeroValueQuestion<_Tp>(); } |
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|
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/* |
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516 |
* Base class used: |
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* - to simulate partial template specialization |
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518 |
* - to simulate partial function ordering |
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519 |
* - to recognize STLport class from user specialized one |
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*/ |
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521 |
template <class _Tp> |
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522 |
struct __stlport_class |
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{ typedef _Tp _Type; }; |
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524 |
|
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525 |
template <class _Tp> |
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struct _IsSTLportClass { |
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typedef typename _IsConvertible<_Tp, __stlport_class<_Tp> >::_Ret _Ret; |
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#if defined (__BORLANDC__) |
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enum { _Is = _IsConvertible<_Tp, __stlport_class<_Tp> >::value }; |
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#endif |
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531 |
}; |
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532 |
|
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#if defined (_STLP_USE_PARTIAL_SPEC_WORKAROUND) && !defined (_STLP_FUNCTION_TMPL_PARTIAL_ORDER) |
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template <class _Tp> |
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struct _SwapImplemented { |
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typedef typename _IsSTLportClass<_Tp>::_Ret _Ret; |
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# if defined (__BORLANDC__) |
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enum { _Is = _IsSTLportClass<_Tp>::_Is }; |
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# endif |
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}; |
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541 |
#endif |
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|
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543 |
template <class _Tp> |
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class _TpWithState : private _Tp { |
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_TpWithState(); |
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int _state; |
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}; |
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|
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/* This is an internal helper struct used to guess if we are working |
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* on a stateless class. It can only be instanciated with a class type. */ |
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template <class _Tp> |
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struct _IsStateless { |
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enum { _Is = sizeof(_TpWithState<_Tp>) == sizeof(int) }; |
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typedef typename __bool2type<_Is>::_Ret _Ret; |
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}; |
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556 |
|
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_STLP_END_NAMESPACE |
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|
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#ifdef _STLP_CLASS_PARTIAL_SPECIALIZATION |
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# if defined (__BORLANDC__) || \ |
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defined (__SUNPRO_CC) || \ |
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(defined (__MWERKS__) && (__MWERKS__ <= 0x2303)) || \ |
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(defined (__sgi) && defined (_COMPILER_VERSION)) || \ |
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defined (__DMC__) |
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# define _STLP_IS_POD_ITER(_It, _Tp) __type_traits< typename iterator_traits< _Tp >::value_type >::is_POD_type() |
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# else |
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# define _STLP_IS_POD_ITER(_It, _Tp) typename __type_traits< typename iterator_traits< _Tp >::value_type >::is_POD_type() |
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568 |
# endif |
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569 |
#else |
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# define _STLP_IS_POD_ITER(_It, _Tp) _Is_POD( _STLP_VALUE_TYPE( _It, _Tp ) )._Answer() |
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#endif |
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|
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#endif /* _STLP_TYPE_TRAITS_H */ |
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|
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// Local Variables: |
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576 |
// mode:C++ |
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577 |
// End: |