: VALUE rb_convert_type(VALUE val, int type, const char *tname, const char *method)
    ֥val򥯥饹typeΥ󥹥󥹤Ѵޤ
    Ѵˤϡval.methodͤȤޤ

    valȤtype饹Υ󥹥󥹤ʤval
    Τޤ֤ޤ

