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Add macros to conditionally suppress clang warnings.

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The added macros wxCLANG_WARNING_{SUPPRESS,RESTORE} are similar to
wxGCC_WARNING_{SUPPRESS,RESTORE}, but the `wxCLANG_' version will expand to
compiler pragmas only when the warning name is known to the compiler.

They use clang's __has_warning feature.
This commit is contained in:
ARATA Mizuki
2015-09-21 23:45:51 +09:00
parent 3de5077c7a
commit f90205951c
1 changed files with 23 additions and 0 deletions
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23
include/wx/defs.h
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@@ -695,6 +695,29 @@ typedef short int WXTYPE;
# define wxGCC_WARNING_RESTORE(x)
#endif
/*
Macros to suppress and restore clang warning only when it is valid.
Example:
wxCLANG_WARNING_SUPPRESS(inconsistent-missing-override)
virtual wxClassInfo *GetClassInfo() const
wxCLANG_WARNING_RESTORE(inconsistent-missing-override)
*/
#if defined(__has_warning)
# define wxCLANG_HAS_WARNING(x) __has_warning(x) /* allow macro expansion for the warning name */
# define wxCLANG_IF_VALID_WARNING(x,y) \
wxCONCAT(wxCLANG_IF_VALID_WARNING_,wxCLANG_HAS_WARNING(wxSTRINGIZE(wxCONCAT(-W,x))))(y)
# define wxCLANG_IF_VALID_WARNING_0(x)
# define wxCLANG_IF_VALID_WARNING_1(x) x
# define wxCLANG_WARNING_SUPPRESS(x) \
wxCLANG_IF_VALID_WARNING(x,wxGCC_WARNING_SUPPRESS(x))
# define wxCLANG_WARNING_RESTORE(x) \
wxCLANG_IF_VALID_WARNING(x,wxGCC_WARNING_RESTORE(x))
#else
# define wxCLANG_WARNING_SUPPRESS(x)
# define wxCLANG_WARNING_RESTORE(x)
#endif
/*
Combination of the two variants above: should be used for deprecated
functions which are defined inline and are used by wxWidgets itself.