1894e49f51
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@51407 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
62 lines
2.2 KiB
C
62 lines
2.2 KiB
C
/*
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* Name: wx/cpp.h
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* Purpose: Various preprocessor helpers
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* Author: Vadim Zeitlin
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* Created: 2006-09-30
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* RCS-ID: $Id$
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* Copyright: (c) 2006 Vadim Zeitlin <vadim@wxwindows.org>
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* Licence: wxWindows licence
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*/
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/* THIS IS A C FILE, DON'T USE C++ FEATURES (IN PARTICULAR COMMENTS) IN IT */
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#ifndef _WX_CPP_H_
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#define _WX_CPP_H_
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/* wxCONCAT works like preprocessor ## operator but also works with macros */
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#define wxCONCAT_HELPER(text, line) text ## line
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#define wxCONCAT(text, line) wxCONCAT_HELPER(text, line)
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#define wxCONCAT3(x1, x2, x3) wxCONCAT(wxCONCAT(x1, x2), x3)
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#define wxCONCAT4(x1, x2, x3, x4) wxCONCAT(wxCONCAT3(x1, x2, x3), x4)
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#define wxCONCAT5(x1, x2, x3, x4, x5) wxCONCAT(wxCONCAT4(x1, x2, x3, x4), x5)
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/* wxSTRINGIZE works as the preprocessor # operator but also works with macros */
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#define wxSTRINGIZE_HELPER(x) #x
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#define wxSTRINGIZE(x) wxSTRINGIZE_HELPER(x)
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/* a Unicode-friendly version of wxSTRINGIZE_T */
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#define wxSTRINGIZE_T(x) wxAPPLY_T(wxSTRINGIZE(x))
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/*
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Helper macros for wxMAKE_UNIQUE_NAME: normally this works by appending the
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current line number to the given identifier to reduce the probability of the
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conflict (it may still happen if this is used in the headers, hence you
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should avoid doing it or provide unique prefixes then) but we have to do it
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differently for VC++
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*/
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#if defined(__VISUALC__) && (__VISUALC__ >= 1300)
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/*
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__LINE__ handling is completely broken in VC++ when using "Edit and
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Continue" (/ZI option) and results in preprocessor errors if we use it
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inside the macros. Luckily VC7 has another standard macro which can be
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used like this and is even better than __LINE__ because it is globally
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unique.
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*/
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# define wxCONCAT_LINE(text) wxCONCAT(text, __COUNTER__)
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#else /* normal compilers */
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# define wxCONCAT_LINE(text) wxCONCAT(text, __LINE__)
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#endif
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/* Create a "unique" name with the given prefix */
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#define wxMAKE_UNIQUE_NAME(text) wxCONCAT_LINE(text)
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/*
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This macro can be passed as argument to another macro when you don't have
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anything to pass in fact.
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*/
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#define wxEMPTY_PARAMETER_VALUE /* Fake macro parameter value */
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#endif /* _WX_CPP_H_ */
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