Scm_EOFObjectClass  106 src/class.c    SCM_DEFINE_BUILTIN_CLASS_SIMPLE(Scm_EOFObjectClass, NULL);
Scm_EOFObjectClass  582 src/gauche.h   SCM_CLASS_DECL(Scm_EOFObjectClass);
Scm_EOFObjectClass  595 src/gauche.h   #define SCM_CLASS_EOF_OBJECT       (&Scm_EOFObjectClass)