Scm_CopyCharSet   742 src/char.c                     moreset = Scm_CharSetComplement(SCM_CHARSET(Scm_CopyCharSet(SCM_CHARSET(moreset))));
Scm_CopyCharSet  1392 src/extlib.c   SCM_RESULT = Scm_CopyCharSet(cs);
Scm_CopyCharSet   901 src/gauche.h   SCM_EXTERN ScmObj Scm_CopyCharSet(ScmCharSet *src);
Scm_CopyCharSet   895 src/regexp.c               ScmObj ccs = Scm_CopyCharSet(SCM_CHARSET(y));