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Commit	Line	Data
	1	/*
	2	* Name: wx/cpp.h
	3	* Purpose: Various preprocessor helpers
	4	* Author: Vadim Zeitlin
	5	* Created: 2006-09-30
	6	* RCS-ID: $Id$
	7	* Copyright: (c) 2006 Vadim Zeitlin <vadim@wxwindows.org>
	8	* Licence: wxWindows licence
	9	*/
	10
	11	/* THIS IS A C FILE, DON'T USE C++ FEATURES (IN PARTICULAR COMMENTS) IN IT */
	12
	13	#ifndef _WX_CPP_H_
	14	#define _WX_CPP_H_
	15
	16	/* wxCONCAT works like preprocessor ## operator but also works with macros */
	17	#define wxCONCAT_HELPER(text, line) text ## line
	18
	19	#define wxCONCAT(x1, x2) \
	20	wxCONCAT_HELPER(x1, x2)
	21	#define wxCONCAT3(x1, x2, x3) \
	22	wxCONCAT(wxCONCAT(x1, x2), x3)
	23	#define wxCONCAT4(x1, x2, x3, x4) \
	24	wxCONCAT(wxCONCAT3(x1, x2, x3), x4)
	25	#define wxCONCAT5(x1, x2, x3, x4, x5) \
	26	wxCONCAT(wxCONCAT4(x1, x2, x3, x4), x5)
	27	#define wxCONCAT6(x1, x2, x3, x4, x5, x6) \
	28	wxCONCAT(wxCONCAT5(x1, x2, x3, x4, x5), x6)
	29	#define wxCONCAT7(x1, x2, x3, x4, x5, x6, x7) \
	30	wxCONCAT(wxCONCAT6(x1, x2, x3, x4, x5, x6), x7)
	31	#define wxCONCAT8(x1, x2, x3, x4, x5, x6, x7, x8) \
	32	wxCONCAT(wxCONCAT7(x1, x2, x3, x4, x5, x6, x7), x8)
	33	#define wxCONCAT9(x1, x2, x3, x4, x5, x6, x7, x8, x9) \
	34	wxCONCAT(wxCONCAT8(x1, x2, x3, x4, x5, x6, x7, x8), x9)
	35
	36	/* wxSTRINGIZE works as the preprocessor # operator but also works with macros */
	37	#define wxSTRINGIZE_HELPER(x) #x
	38	#define wxSTRINGIZE(x) wxSTRINGIZE_HELPER(x)
	39
	40	/* a Unicode-friendly version of wxSTRINGIZE_T */
	41	#define wxSTRINGIZE_T(x) wxAPPLY_T(wxSTRINGIZE(x))
	42
	43	/*
	44	Special workarounds for compilers with broken "##" operator. For all the
	45	other ones we can just use it directly.
	46	*/
	47	#ifdef wxCOMPILER_BROKEN_CONCAT_OPER
	48	#define wxPREPEND_L(x) L ## x
	49	#define wxAPPEND_i64(x) x ## i64
	50	#define wxAPPEND_ui64(x) x ## ui64
	51	#endif /* wxCOMPILER_BROKEN_CONCAT_OPER */
	52
	53	/*
	54	Helper macros for wxMAKE_UNIQUE_NAME: normally this works by appending the
	55	current line number to the given identifier to reduce the probability of the
	56	conflict (it may still happen if this is used in the headers, hence you
	57	should avoid doing it or provide unique prefixes then) but we have to do it
	58	differently for VC++
	59	*/
	60	#if defined(__VISUALC__) && (__VISUALC__ >= 1300)
	61	/*
	62	__LINE__ handling is completely broken in VC++ when using "Edit and
	63	Continue" (/ZI option) and results in preprocessor errors if we use it
	64	inside the macros. Luckily VC7 has another standard macro which can be
	65	used like this and is even better than __LINE__ because it is globally
	66	unique.
	67	*/
	68	# define wxCONCAT_LINE(text) wxCONCAT(text, __COUNTER__)
	69	#else /* normal compilers */
	70	# define wxCONCAT_LINE(text) wxCONCAT(text, __LINE__)
	71	#endif
	72
	73	/* Create a "unique" name with the given prefix */
	74	#define wxMAKE_UNIQUE_NAME(text) wxCONCAT_LINE(text)
	75
	76	/*
	77	This macro can be passed as argument to another macro when you don't have
	78	anything to pass in fact.
	79	*/
	80	#define wxEMPTY_PARAMETER_VALUE /* Fake macro parameter value */
	81
	82	/*
	83	Define __WXFUNCTION__ which is like standard __FUNCTION__ but defined as
	84	NULL for the compilers which don't support the latter.
	85	*/
	86	#ifndef __WXFUNCTION__
	87	/* TODO: add more compilers supporting __FUNCTION__ */
	88	#if defined(__DMC__)
	89	/*
	90	__FUNCTION__ happens to be not defined within class members
	91	http://www.digitalmars.com/drn-bin/wwwnews?c%2B%2B.beta/485
	92	*/
	93	#define __WXFUNCTION__ (NULL)
	94	#elif defined(__GNUC__) \|\| \
	95	(defined(_MSC_VER) && _MSC_VER >= 1300) \|\| \
	96	defined(__FUNCTION__)
	97	#define __WXFUNCTION__ __FUNCTION__
	98	#else
	99	/* still define __WXFUNCTION__ to avoid #ifdefs elsewhere */
	100	#define __WXFUNCTION__ (NULL)
	101	#endif
	102	#endif /* __WXFUNCTION__ already defined */
	103
	104	#endif /* _WX_CPP_H_ */
	105