/usr/include/wx-3.0/wx/meta/pod.h is in wx3.0-headers 3.0.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// Name: wx/meta/pod.h
// Purpose: Test if a type is POD
// Author: Vaclav Slavik, Jaakko Salli
// Created: 2010-06-14
// Copyright: (c) wxWidgets team
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifndef _WX_META_POD_H_
#define _WX_META_POD_H_
#include "wx/defs.h"
//
// TODO: Use TR1 is_pod<> implementation where available. VC9 SP1 has it
// in tr1 namespace, VC10 has it in std namespace. GCC 4.2 has it in
// <tr1/type_traits>, while GCC 4.3 and later have it in <type_traits>.
//
// This macro declares something called "value" inside a class declaration.
//
// It has to be used because VC6 doesn't handle initialization of the static
// variables in the class declaration itself while BCC5.82 doesn't understand
// enums (it compiles the template fine but can't use it later)
#if defined(__VISUALC__) && !wxCHECK_VISUALC_VERSION(7)
#define wxDEFINE_TEMPLATE_BOOL_VALUE(val) enum { value = val }
#else
#define wxDEFINE_TEMPLATE_BOOL_VALUE(val) static const bool value = val
#endif
// Helper to decide if an object of type T is POD (Plain Old Data)
template<typename T>
struct wxIsPod
{
wxDEFINE_TEMPLATE_BOOL_VALUE(false);
};
// Macro to add wxIsPod<T> specialization for given type that marks it
// as Plain Old Data:
#define WX_DECLARE_TYPE_POD(type) \
template<> struct wxIsPod<type> \
{ \
wxDEFINE_TEMPLATE_BOOL_VALUE(true); \
};
WX_DECLARE_TYPE_POD(bool)
WX_DECLARE_TYPE_POD(unsigned char)
WX_DECLARE_TYPE_POD(signed char)
WX_DECLARE_TYPE_POD(unsigned int)
WX_DECLARE_TYPE_POD(signed int)
WX_DECLARE_TYPE_POD(unsigned short int)
WX_DECLARE_TYPE_POD(signed short int)
WX_DECLARE_TYPE_POD(signed long int)
WX_DECLARE_TYPE_POD(unsigned long int)
WX_DECLARE_TYPE_POD(float)
WX_DECLARE_TYPE_POD(double)
WX_DECLARE_TYPE_POD(long double)
#if wxWCHAR_T_IS_REAL_TYPE
WX_DECLARE_TYPE_POD(wchar_t)
#endif
#ifdef wxLongLong_t
WX_DECLARE_TYPE_POD(wxLongLong_t)
WX_DECLARE_TYPE_POD(wxULongLong_t)
#endif
// Visual C++ 6.0 can't compile partial template specializations and as this is
// only an optimization, we can live with pointers not being recognized as
// POD types under VC6
#if !defined(__VISUALC__) || wxCHECK_VISUALC_VERSION(7)
// pointers are Plain Old Data:
template<typename T>
struct wxIsPod<T*>
{
static const bool value = true;
};
template<typename T>
struct wxIsPod<const T*>
{
static const bool value = true;
};
#endif // !VC++ < 7
#endif // _WX_META_POD_H_
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