each_line

/*
 * call-seq:
 *   strio.each(sep_string=$/)      {|line| block }  -> strio
 *   strio.each_line(sep_string=$/) {|line| block }  -> strio
 *
 * See IO#each.
 */
static VALUE
strio_each(argc, argv, self)
    int argc;
    VALUE *argv;
    VALUE self;
{
    struct StringIO *ptr = StringIO(self);
    VALUE line;

    RETURN_ENUMERATOR(self, argc, argv);

    while (!NIL_P(line = strio_getline(argc, argv, readable(ptr)))) {
        rb_yield(line);
    }
    return self;
}