258593354e
Disable some parts of the code that this compiler had problems with. Add parentheses to work around its bugs elsewhere. Closes #12558. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@66054 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
114 lines
3.5 KiB
C++
114 lines
3.5 KiB
C++
/////////////////////////////////////////////////////////////////////////////
|
|
// Name: wx/meta/implicitconversion.h
|
|
// Purpose: Determine resulting type from implicit conversion
|
|
// Author: Vaclav Slavik
|
|
// Created: 2010-10-22
|
|
// RCS-ID: $Id$
|
|
// Copyright: (c) 2010 Vaclav Slavik
|
|
// Licence: wxWindows licence
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef _WX_META_IMPLICITCONVERSION_H_
|
|
#define _WX_META_IMPLICITCONVERSION_H_
|
|
|
|
#include "wx/defs.h"
|
|
#include "wx/meta/if.h"
|
|
|
|
// C++ hierarchy of data types is:
|
|
//
|
|
// Long double (highest)
|
|
// Double
|
|
// Float
|
|
// Unsigned long int
|
|
// Long int
|
|
// Unsigned int
|
|
// Int (lowest)
|
|
//
|
|
// Types lower in the hierarchy are converted into ones higher up if both are
|
|
// involved e.g. in arithmetic expressions.
|
|
|
|
namespace wxPrivate
|
|
{
|
|
|
|
// Helper macro to define a constant inside a template class: it's needed
|
|
// because MSVC6 doesn't support initializing static integer members but the
|
|
// usual workaround of using enums instead doesn't work for Borland (at least
|
|
// in template classes).
|
|
#ifdef __VISUALC6__
|
|
#define wxDEFINE_CLASS_INT_CONST(name, value) enum { name = value }
|
|
#else
|
|
#define wxDEFINE_CLASS_INT_CONST(name, value) static const int name = value
|
|
#endif
|
|
|
|
template<typename T>
|
|
struct TypeHierarchy
|
|
{
|
|
// consider unknown types (e.g. objects, pointers) to be of highest
|
|
// level, always convert to them if they occur
|
|
wxDEFINE_CLASS_INT_CONST( level, 9999 );
|
|
};
|
|
|
|
#define WX_TYPE_HIERARCHY_LEVEL(level_num, type) \
|
|
template<> struct TypeHierarchy<type> \
|
|
{ \
|
|
wxDEFINE_CLASS_INT_CONST( level, level_num ); \
|
|
}
|
|
|
|
WX_TYPE_HIERARCHY_LEVEL( 1, char);
|
|
WX_TYPE_HIERARCHY_LEVEL( 2, unsigned char);
|
|
WX_TYPE_HIERARCHY_LEVEL( 3, short);
|
|
WX_TYPE_HIERARCHY_LEVEL( 4, unsigned short);
|
|
WX_TYPE_HIERARCHY_LEVEL( 5, int);
|
|
WX_TYPE_HIERARCHY_LEVEL( 6, unsigned int);
|
|
WX_TYPE_HIERARCHY_LEVEL( 7, long);
|
|
WX_TYPE_HIERARCHY_LEVEL( 8, unsigned long);
|
|
#ifdef wxLongLong_t
|
|
WX_TYPE_HIERARCHY_LEVEL( 9, wxLongLong_t);
|
|
WX_TYPE_HIERARCHY_LEVEL(10, wxULongLong_t);
|
|
#endif
|
|
WX_TYPE_HIERARCHY_LEVEL(11, float);
|
|
WX_TYPE_HIERARCHY_LEVEL(12, double);
|
|
WX_TYPE_HIERARCHY_LEVEL(13, long double);
|
|
|
|
#if wxWCHAR_T_IS_REAL_TYPE
|
|
#if SIZEOF_WCHAR_T == SIZEOF_SHORT
|
|
template<> struct TypeHierarchy<wchar_t> : public TypeHierarchy<short> {};
|
|
#elif SIZEOF_WCHAR_T == SIZEOF_INT
|
|
template<> struct TypeHierarchy<wchar_t> : public TypeHierarchy<int> {};
|
|
#elif SIZEOF_WCHAR_T == SIZEOF_LONG
|
|
template<> struct TypeHierarchy<wchar_t> : public TypeHierarchy<long> {};
|
|
#else
|
|
#error "weird wchar_t size, please update this code"
|
|
#endif
|
|
#endif
|
|
|
|
#undef WX_TYPE_HIERARCHY_LEVEL
|
|
|
|
} // namespace wxPrivate
|
|
|
|
// Helper to determine resulting type of implicit conversion in
|
|
// an expression with two arithmetic types.
|
|
template<typename T1, typename T2>
|
|
struct wxImplicitConversionType
|
|
{
|
|
typedef typename wxIf
|
|
<
|
|
// if T2 is "higher" type, convert to it
|
|
(int)(wxPrivate::TypeHierarchy<T1>::level) < (int)(wxPrivate::TypeHierarchy<T2>::level),
|
|
T2,
|
|
// otherwise use T1
|
|
T1
|
|
>::value
|
|
value;
|
|
};
|
|
|
|
|
|
template<typename T1, typename T2, typename T3>
|
|
struct wxImplicitConversionType3 : public wxImplicitConversionType<
|
|
T1,
|
|
typename wxImplicitConversionType<T2,T3>::value>
|
|
{
|
|
};
|
|
|
|
#endif // _WX_META_IMPLICITCONVERSION_H_
|