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70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
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/////////////////////////////////////////////////////////////////////////////
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// Name: wx/meta/pod.h
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// Purpose: Test if a type is POD
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// Author: Vaclav Slavik, Jaakko Salli
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// Created: 2010-06-14
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// Copyright: (c) wxWidgets team
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_META_POD_H_
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#define _WX_META_POD_H_
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#include "wx/defs.h"
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//
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// TODO: Use TR1 is_pod<> implementation where available. VC9 SP1 has it
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// in tr1 namespace, VC10 has it in std namespace. GCC 4.2 has it in
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// <tr1/type_traits>, while GCC 4.3 and later have it in <type_traits>.
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//
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// Helper to decide if an object of type T is POD (Plain Old Data)
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template<typename T>
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struct wxIsPod
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{
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static const bool value = false;
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};
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// Macro to add wxIsPod<T> specialization for given type that marks it
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// as Plain Old Data:
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#define WX_DECLARE_TYPE_POD(type) \
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template<> struct wxIsPod<type> \
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{ \
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static const bool value = true; \
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};
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WX_DECLARE_TYPE_POD(bool)
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WX_DECLARE_TYPE_POD(unsigned char)
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WX_DECLARE_TYPE_POD(signed char)
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WX_DECLARE_TYPE_POD(unsigned int)
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WX_DECLARE_TYPE_POD(signed int)
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WX_DECLARE_TYPE_POD(unsigned short int)
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WX_DECLARE_TYPE_POD(signed short int)
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WX_DECLARE_TYPE_POD(signed long int)
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WX_DECLARE_TYPE_POD(unsigned long int)
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WX_DECLARE_TYPE_POD(float)
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WX_DECLARE_TYPE_POD(double)
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WX_DECLARE_TYPE_POD(long double)
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#if wxWCHAR_T_IS_REAL_TYPE
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WX_DECLARE_TYPE_POD(wchar_t)
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#endif
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#ifdef wxLongLong_t
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WX_DECLARE_TYPE_POD(wxLongLong_t)
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WX_DECLARE_TYPE_POD(wxULongLong_t)
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#endif
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// pointers are Plain Old Data:
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template<typename T>
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struct wxIsPod<T*>
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{
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static const bool value = true;
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};
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template<typename T>
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struct wxIsPod<const T*>
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{
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static const bool value = true;
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};
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#endif // _WX_META_POD_H_
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