rb_io_gets_m     2416 io.c               VALUE line = rb_io_gets_m(argc, argv, io);
rb_io_gets_m     7142 io.c               while (!NIL_P(str = rb_io_gets_m(arg->argc, arg->argv, arg->io))) {
rb_io_gets_m     8592 io.c               rb_define_method(rb_cIO, "gets",  rb_io_gets_m, -1);