Scm_IOUnitErrorClass  159 src/error.c    SCM_DEFINE_BASE_CLASS(Scm_IOUnitErrorClass, ScmIOUnitError,
Scm_IOUnitErrorClass  177 src/gauche/exception.h SCM_CLASS_DECL(Scm_IOUnitErrorClass);
Scm_IOUnitErrorClass  178 src/gauche/exception.h #define SCM_CLASS_IO_UNIT_ERROR      (&Scm_IOUnitErrorClass)