+/* ---------------------------------------------------------------------------- */
+/* Compile time asserts */
+/* */
+/* Unlike the normal assert and related macros above which are checked during */
+/* the program tun-time the macros below will result in a compilation error if */
+/* the condition they check is false. This is usually used to check the */
+/* expressions containing sizeof()s which cannot be tested with the */
+/* preprocessor. If you can use the #if's, do use them as you can give a more */
+/* detailed error message then. */
+/* ---------------------------------------------------------------------------- */
+
+/*
+ How this works (you don't have to understand it to be able to use the
+ macros): we rely on the fact that it is invalid to define a named bit field
+ in a struct of width 0. All the rest are just the hacks to minimize the
+ possibility of the compiler warnings when compiling this macro: in
+ particular, this is why we define a struct and not an object (which would
+ result in a warning about unused variable) and a named struct (otherwise we'd
+ get a warning about an unnamed struct not used to define an object!).
+ */
+
+#define wxMAKE_UNIQUE_ASSERT_NAME wxMAKE_UNIQUE_NAME(wxAssert_)
+
+/*
+ The second argument of this macro must be a valid C++ identifier and not a
+ string. I.e. you should use it like this:
+
+ wxCOMPILE_TIME_ASSERT( sizeof(int) >= 2, YourIntsAreTooSmall );
+
+ It may be used both within a function and in the global scope.
+*/
+#define wxCOMPILE_TIME_ASSERT(expr, msg) \
+ struct wxMAKE_UNIQUE_ASSERT_NAME { unsigned int msg: expr; }
+
+/*
+ When using VC++ 6 with "Edit and Continue" on, the compiler completely
+ mishandles __LINE__ and so wxCOMPILE_TIME_ASSERT() doesn't work, provide a
+ way to make "unique" assert names by specifying a unique prefix explicitly
+ */
+#define wxMAKE_UNIQUE_ASSERT_NAME2(text) wxCONCAT(wxAssert_, text)
+
+#define wxCOMPILE_TIME_ASSERT2(expr, msg, text) \
+ struct wxMAKE_UNIQUE_ASSERT_NAME2(text) { unsigned int msg: expr; }
+
+/* helpers for wxCOMPILE_TIME_ASSERT below, for private use only */
+#define wxMAKE_BITSIZE_MSG(type, size) type ## SmallerThan ## size ## Bits
+
+/* a special case of compile time assert: check that the size of the given type */
+/* is at least the given number of bits */
+#define wxASSERT_MIN_BITSIZE(type, size) \
+ wxCOMPILE_TIME_ASSERT(sizeof(type) * CHAR_BIT >= size, \
+ wxMAKE_BITSIZE_MSG(type, size))
+
+/* ---------------------------------------------------------------------------- */
+/* other miscellaneous debugger-related functions */
+/* ---------------------------------------------------------------------------- */
+
+/* return true if we're running under debugger */
+/* */
+/* currently this only really works under Mac in CodeWarrior builds, it always */
+/* returns false otherwise */
+#ifdef __cplusplus
+ #ifdef __WXMAC__
+ extern bool WXDLLIMPEXP_BASE wxIsDebuggerRunning();
+ #else /* !Mac */
+ inline bool wxIsDebuggerRunning() { return false; }
+ #endif /* Mac/!Mac */
+#endif /* __cplusplus */
+
+#endif /* _WX_DEBUG_H_ */
projects / wxWidgets.git / blobdiff