| | 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 | #define wxCONCAT(text, line) wxCONCAT_HELPER(text, line) |
| | 19 | |
| | 20 | /* wxSTRINGIZE works as the preprocessor # operator but also works with macros */ |
| | 21 | #define wxSTRINGIZE_HELPER(x) #x |
| | 22 | #define wxSTRINGIZE(x) wxSTRINGIZE_HELPER(x) |
| | 23 | |
| | 24 | /* a Unicode-friendly version of wxSTRINGIZE_T */ |
| | 25 | #define wxSTRINGIZE_T(x) wxAPPLY_T(wxSTRINGIZE(x)) |
| | 26 | |
| | 27 | /* |
| | 28 | Helper macros for wxMAKE_UNIQUE_NAME: normally this works by appending the |
| | 29 | current line number to the given identifier to reduce the probability of the |
| | 30 | conflict (it may still happen if this is used in the headers, hence you |
| | 31 | should avoid doing it or provide unique prefixes then) but we have to do it |
| | 32 | differently for VC++ |
| | 33 | */ |
| | 34 | #if defined(__VISUALC__) && (__VISUALC__ >= 1300) |
| | 35 | /* |
| | 36 | __LINE__ handling is completely broken in VC++ when using "Edit and |
| | 37 | Continue" (/ZI option) and results in preprocessor errors if we use it |
| | 38 | inside the macros. Luckily VC7 has another standard macro which can be |
| | 39 | used like this and is even better than __LINE__ because it is globally |
| | 40 | unique. |
| | 41 | */ |
| | 42 | # define wxCONCAT_LINE(text) wxCONCAT(text, __COUNTER__) |
| | 43 | #else /* normal compilers */ |
| | 44 | # define wxCONCAT_LINE(text) wxCONCAT(text, __LINE__) |
| | 45 | #endif |
| | 46 | |
| | 47 | /* Create a "unique" name with the given prefix */ |
| | 48 | #define wxMAKE_UNIQUE_NAME(text) wxCONCAT_LINE(text) |
| | 49 | |
| | 50 | /* |
| | 51 | This macro can be passed as argument to another macro when you don't have |
| | 52 | anything to pass in fact. |
| | 53 | */ |
| | 54 | #define wxEMPTY_PARAMETER_VALUE /* Fake macro parameter value */ |
| | 55 | |
| | 56 | #endif /* _WX_CPP_H_ */ |
| | 57 | |
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