Scm_LogXor        206 src/extlib.c     ScmObj cp, r = Scm_LogXor(x, y);
Scm_LogXor        208 src/extlib.c       r = Scm_LogXor(r, SCM_CAR(cp));
Scm_LogXor       2180 src/gauche.h   SCM_EXTERN ScmObj Scm_LogXor(ScmObj x, ScmObj y);