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///////////////////////////////////////////////////////////////////////////////
// Name: wx/typeinfo.h
// Purpose: wxTypeId implementation
// Author: Jaakko Salli
// Created: 2009-11-19
// Copyright: (c) wxWidgets Team
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
#ifndef _WX_TYPEINFO_H_
#define _WX_TYPEINFO_H_
//
// This file defines wxTypeId macro that should be used internally in
// wxWidgets instead of typeid(), for compatibility with builds that do
// not implement C++ RTTI. Also, type defining macros in this file are
// intended for internal use only at this time and may change in future
// versions.
//
// The reason why we need this simple RTTI system in addition to the older
// wxObject-based one is that the latter does not work in template
// classes.
//
#include "wx/defs.h"
#ifndef wxNO_RTTI
//
// Let's trust that Visual C++ versions 9.0 and later implement C++
// RTTI well enough, so we can use it and work around harmless memory
// leaks reported by the static run-time libraries.
//
#if wxCHECK_VISUALC_VERSION(9)
#define wxTRUST_CPP_RTTI 1
#else
#define wxTRUST_CPP_RTTI 0
#endif
#include <typeinfo>
#include <string.h>
#define _WX_DECLARE_TYPEINFO_CUSTOM(CLS, IDENTFUNC)
#define WX_DECLARE_TYPEINFO_INLINE(CLS)
#define WX_DECLARE_TYPEINFO(CLS)
#define WX_DEFINE_TYPEINFO(CLS)
#define WX_DECLARE_ABSTRACT_TYPEINFO(CLS)
#if wxTRUST_CPP_RTTI
#define wxTypeId typeid
#else /* !wxTRUST_CPP_RTTI */
//
// For improved type-safety, let's make the check using class name
// comparison. Most modern compilers already do this, but we cannot
// rely on all supported compilers to work this well. However, in
// cases where we'd know that typeid() would be flawless (as such),
// wxTypeId could of course simply be defined as typeid.
//
class wxTypeIdentifier
{
public:
wxTypeIdentifier(const char* className)
{
m_className = className;
}
bool operator==(const wxTypeIdentifier& other)
{
return strcmp(m_className, other.m_className) == 0;
}
bool operator!=(const wxTypeIdentifier& other)
{
return strcmp(m_className, other.m_className) != 0;
}
private:
const char* m_className;
};
#define wxTypeId(OBJ) wxTypeIdentifier(typeid(OBJ).name())
#endif /* wxTRUST_CPP_RTTI/!wxTRUST_CPP_RTTI */
#else // if !wxNO_RTTI
#define wxTRUST_CPP_RTTI 0
//
// When C++ RTTI is not available, we will have to make the type comparison
// using pointer to a dummy static member function. This will fail if
// declared type is used across DLL boundaries, although using
// WX_DECLARE_TYPEINFO() and WX_DEFINE_TYPEINFO() pair instead of
// WX_DECLARE_TYPEINFO_INLINE() should fix this. However, that approach is
// usually not possible when type info needs to be declared for a template
// class.
//
typedef void (*wxTypeIdentifier)();
// Use this macro to declare type info with specified static function
// IDENTFUNC used as type identifier. Usually you should only use
// WX_DECLARE_TYPEINFO() or WX_DECLARE_TYPEINFO_INLINE() however.
#define _WX_DECLARE_TYPEINFO_CUSTOM(CLS, IDENTFUNC) \
public: \
virtual wxTypeIdentifier GetWxTypeId() const \
{ \
return reinterpret_cast<wxTypeIdentifier> \
(&IDENTFUNC); \
}
// Use this macro to declare type info with externally specified
// type identifier, defined with WX_DEFINE_TYPEINFO().
#define WX_DECLARE_TYPEINFO(CLS) \
private: \
static CLS sm_wxClassInfo(); \
_WX_DECLARE_TYPEINFO_CUSTOM(CLS, sm_wxClassInfo)
// Use this macro to implement type identifier function required by
// WX_DECLARE_TYPEINFO().
// NOTE: CLS is required to have default ctor. If it doesn't
// already, you should provide a private dummy one.
#define WX_DEFINE_TYPEINFO(CLS) \
CLS CLS::sm_wxClassInfo() { return CLS(); }
// Use this macro to declare type info fully inline in class.
// NOTE: CLS is required to have default ctor. If it doesn't
// already, you should provide a private dummy one.
#define WX_DECLARE_TYPEINFO_INLINE(CLS) \
private: \
static CLS sm_wxClassInfo() { return CLS(); } \
_WX_DECLARE_TYPEINFO_CUSTOM(CLS, sm_wxClassInfo)
#define wxTypeId(OBJ) (OBJ).GetWxTypeId()
// Because abstract classes cannot be instantiated, we use
// this macro to define pure virtual type interface for them.
#define WX_DECLARE_ABSTRACT_TYPEINFO(CLS) \
public: \
virtual wxTypeIdentifier GetWxTypeId() const = 0;
#endif // wxNO_RTTI/!wxNO_RTTI
#endif // _WX_TYPEINFO_H_
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