FcCharSetMerge - Merge charsets
#include <fontconfig.h>
FcBool FcCharSetMerge(FcCharSet *a);
(const FcCharSet *b);
(FcBool *changed);
.fi
Adds all chars in b to a. In other words, this is an in-place version
of FcCharSetUnion. If changed is not NULL, then it returns whether any
new chars from b were added to a. Returns FcFalse on failure, either
when a is a constant set or from running out of memory.
Fontconfig version 2.8.0
18 November 2009 FcCharSetMerge(3)