lib/typetraits.h: QChar_of(): Add macro

This macro is useful to implement QChar versions of functions.
See ISO C23 for a description of what QChar is.

Signed-off-by: Alejandro Colomar <alx@kernel.org>

diff --git a/lib/typetraits.h b/lib/typetraits.h
index ce29a8f323f0d522b9e635a4ff7876782f0c3adb..051edfc66f14d83cc9573a1ddb32ab26ffb3a1ed 100644 (file)
--- a/lib/typetraits.h
+++ b/lib/typetraits.h
@@ -54,4 +54,15 @@
 )
 
 
+#define QChar_of(s)  typeof                                           \
+(                                                                     \
+       _Generic(s,                                                   \
+               const char *:  (const char){},                        \
+               const void *:  (const char){},                        \
+               char *:        (char){},                              \
+               void *:        (char){}                               \
+       )                                                             \
+)
+
+
 #endif  // include guard