rb_reg_equal     2978 re.c               if (!rb_reg_equal(RMATCH(match1)->regexp, RMATCH(match2)->regexp)) return Qfalse;
rb_reg_equal     3935 re.c               rb_define_method(rb_cRegexp, "eql?", rb_reg_equal, 1);
rb_reg_equal     3936 re.c               rb_define_method(rb_cRegexp, "==", rb_reg_equal, 1);