rb_str_setter     781 include/ruby/intern.h void rb_str_setter(VALUE, ID, VALUE*);
rb_str_setter    12266 io.c               rb_define_hooked_variable("$,", &rb_output_fs, 0, rb_str_setter);
rb_str_setter    12272 io.c               rb_define_hooked_variable("$/", &rb_rs, 0, rb_str_setter);
rb_str_setter    12273 io.c               rb_define_hooked_variable("$-0", &rb_rs, 0, rb_str_setter);
rb_str_setter    12274 io.c               rb_define_hooked_variable("$\\", &rb_output_rs, 0, rb_str_setter);