clo_scm 5895 src/extlib.c ScmObj clo_scm; clo_scm 5898 src/extlib.c clo_scm = SCM_ARGREF(0); clo_scm 5899 src/extlib.c if (!SCM_CLOSUREP(clo_scm)) Scm_Error("closure required, but got %S", clo_scm); clo_scm 5900 src/extlib.c clo = SCM_CLOSURE(clo_scm);