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Commit	Line	Data
	1	///////////////////////////////////////////////////////////////////////////////
	2	// Name: wx/checkeddelete.h
	3	// Purpose: wxCHECKED_DELETE() macro
	4	// Author: Vadim Zeitlin
	5	// Created: 2009-02-03
	6	// RCS-ID: $Id$
	7	// Copyright: (c) 2002-2009 wxWidgets dev team
	8	// Licence: wxWindows licence
	9	///////////////////////////////////////////////////////////////////////////////
	10
	11	#ifndef _WX_CHECKEDDELETE_H_
	12	#define _WX_CHECKEDDELETE_H_
	13
	14	// TODO: provide wxCheckedDelete[Array]() template functions too
	15
	16	// ----------------------------------------------------------------------------
	17	// wxCHECKED_DELETE and wxCHECKED_DELETE_ARRAY macros
	18	// ----------------------------------------------------------------------------
	19
	20	/*
	21	checked deleters are used to make sure that the type being deleted is really
	22	a complete type.: otherwise sizeof() would result in a compile-time error
	23
	24	do { ... } while ( 0 ) construct is used to have an anonymous scope
	25	(otherwise we could have name clashes between different "complete"s) but
	26	still force a semicolon after the macro
	27	*/
	28
	29	#ifdef __WATCOMC__
	30	#define wxFOR_ONCE(name) for(int name=0; name<1; name++)
	31	#define wxPRE_NO_WARNING_SCOPE(name) wxFOR_ONCE(wxMAKE_UNIQUE_NAME(name))
	32	#define wxPOST_NO_WARNING_SCOPE(name)
	33	#else
	34	#define wxPRE_NO_WARNING_SCOPE(name) do
	35	#define wxPOST_NO_WARNING_SCOPE(name) while ( wxFalse )
	36	#endif
	37
	38	#define wxCHECKED_DELETE(ptr) \
	39	wxPRE_NO_WARNING_SCOPE(scope_var1) \
	40	{ \
	41	typedef char complete[sizeof(*ptr)]; \
	42	delete ptr; \
	43	} wxPOST_NO_WARNING_SCOPE(scope_var1)
	44
	45	#define wxCHECKED_DELETE_ARRAY(ptr) \
	46	wxPRE_NO_WARNING_SCOPE(scope_var2) \
	47	{ \
	48	typedef char complete[sizeof(*ptr)]; \
	49	delete [] ptr; \
	50	} wxPOST_NO_WARNING_SCOPE(scope_var2)
	51
	52
	53	#endif // _WX_CHECKEDDELETE_H_
	54