Man page - fccharsetunion(3)
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Manual
FcCharSetUnion
NAMESYNOPSIS
DESCRIPTION
NAME
FcCharSetUnion - Add charsets
SYNOPSIS
#include <fontconfig/fontconfig.h>
FcCharSet * FcCharSetUnion (const FcCharSet * a , const FcCharSet * b );
DESCRIPTION
Returns a set including only those chars found in either a or b .