improve iswdigit macro to diagnose errors

this is analogous to commit 2ca55a93 for the macros in ctype.h.

improve iswdigit macro to diagnose errors
this is analogous to commit 2ca55a93 for the macros in ctype.h.
d0040e23 · Rich Felker · 7fe273b2 · d0040e23 · d0040e23
隐藏空白更改
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Showing with 2 addition and 2 deletion

include/wchar.h include/wchar.h +1 -1

include/wctype.h include/wctype.h +1 -1

未找到文件。
--- a/include/wchar.h
+++ b/include/wchar.h
@@ -175,7 +175,7 @@ wctype_t  wctype(const char *);

 #ifndef __cplusplus
 #undef iswdigit
-#define iswdigit(a) ((unsigned)(a)-'0' < 10)
+#define iswdigit(a) (0 ? iswdigit(a) : ((unsigned)(a)-'0') < 10)
 #endif
 #endif


--- a/include/wctype.h
+++ b/include/wctype.h
@@ -45,7 +45,7 @@ wctype_t  wctype(const char *);

 #ifndef __cplusplus
 #undef iswdigit
-#define iswdigit(a) (((unsigned)(a)-L'0') < 10)
+#define iswdigit(a) (0 ? iswdigit(a) : ((unsigned)(a)-'0') < 10)
 #endif

 #if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \