initialize_copy

/*
 * call-seq:
 *   dup
 *   clone
 *
 * Duplicates a StringScanner object.
 */
static VALUE
strscan_init_copy(VALUE vself, VALUE vorig)
{
    struct strscanner *self, *orig;

    Data_Get_Struct(vself, struct strscanner, self);
    check_strscan(vorig);
    Data_Get_Struct(vorig, struct strscanner, orig);
    if (self != orig) {
        self->flags = orig->flags;
        self->str = orig->str;
        self->prev = orig->prev;
        self->curr = orig->curr;
        re_copy_registers(&self->regs, &orig->regs);
    }
    return vself;
}