Scm_IOErrorClass  129 src/error.c        SCM_CLASS_STATIC_PTR(Scm_IOErrorClass),
Scm_IOErrorClass  144 src/error.c    SCM_DEFINE_BASE_CLASS(Scm_IOErrorClass, ScmIOError,
Scm_IOErrorClass  148 src/gauche/exception.h SCM_CLASS_DECL(Scm_IOErrorClass);
Scm_IOErrorClass  149 src/gauche/exception.h #define SCM_CLASS_IO_ERROR       (&Scm_IOErrorClass)