once_scm          644 src/intlib.c     ScmObj once_scm;
once_scm          651 src/intlib.c     once_scm = SCM_ARGREF(2);
once_scm          652 src/intlib.c     if (!SCM_BOOLP(once_scm)) Scm_Error("boolean required, but got %S", once_scm);
once_scm          653 src/intlib.c     once = SCM_BOOL_VALUE(once_scm);