[wxWidgets.git] / include / wx / meta / convertible.h

/////////////////////////////////////////////////////////////////////////////
// Name:        wx/meta/convertible.h
// Purpose:     Test if types are convertible
// Author:      Arne Steinarson
// Created:     2008-01-10
// RCS-ID:      $Id$
// Copyright:   (c) 2008 Arne Steinarson
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifndef _WX_CONVERTIBLE_H_
#define _WX_CONVERTIBLE_H_

// Helper to decide if an object of type D is convertible to type B (the test
// succeeds in particular when D derives from B)
template <class D, class B>
struct wxConvertibleTo
{
    static char Match(B* pb);
    static int Match(...);

    enum { value = sizeof(Match(static_cast<D*>(NULL))) == sizeof(char) };
};

#endif // _WX_CONVERTIBLE_H_
Commit	Line	Data
0fb0ecc4 VZ	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: wx/meta/convertible.h
	3	// Purpose: Test if types are convertible
	4	// Author: Arne Steinarson
	5	// Created: 2008-01-10
	6	// RCS-ID: $Id$
	7	// Copyright: (c) 2008 Arne Steinarson
	8	// Licence: wxWindows licence
	9	/////////////////////////////////////////////////////////////////////////////
	10
	11	#ifndef _WX_CONVERTIBLE_H_
	12	#define _WX_CONVERTIBLE_H_
	13
	14	// Helper to decide if an object of type D is convertible to type B (the test
	15	// succeeds in particular when D derives from B)
	16	template <class D, class B>
	17	struct wxConvertibleTo
	18	{
	19	static char Match(B* pb);
	20	static int Match(...);
	21
	22	enum { value = sizeof(Match(static_cast<D*>(NULL))) == sizeof(char) };
	23	};
	24
	25	#endif // _WX_CONVERTIBLE_H_
	26