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// Copyright (C) 2018-2021 Free Software Foundation, Inc.
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <>.
// rope (SGI extension)
// { dg-do run }
#include <ext/rope>
#include <testsuite_hooks.h>
using __gnu_cxx::crope;
char str_a[] =
char str_b[] =
// Create ropes with leaf nodes longer than __lazy_threshold = 128
// so substring nodes will be created by the next step
crope leaf_rope_a(str_a);
crope leaf_rope_b(str_b);
// Create ropes with substring nodes referencing the leaf nodes
// of the prior ropes
crope substring_rope_a(leaf_rope_a.begin() + 1,
leaf_rope_a.begin() + 199);
crope substring_rope_b(leaf_rope_b.begin() + 1,
leaf_rope_b.begin() + 199);
// Create iterators to substring_rope_a
crope::const_iterator cit_orig = substring_rope_a.begin();
crope::iterator mit_orig = substring_rope_a.mutable_begin();
// Dereference the iterators so they cache a portion of the substring
// node in their internal buffers
// Copy the original iterators, via both copy constructors and
// assignment operators. Prior to the bug fix, these iterators
// retained pointers to the internal buffers of the original
// iterators.
crope::const_iterator cit_copy(cit_orig);
crope::iterator mit_copy(mit_orig);
crope::const_iterator cit_assign; cit_assign = cit_orig;
crope::iterator mit_assign; mit_assign = mit_orig;
// Modify the original iterators to refer to substring_rope_b
cit_orig = substring_rope_b.begin();
mit_orig = substring_rope_b.mutable_begin();
// Dereference the original iterators so they fill their internal
// buffers with part of substring_rope_b
// Verify that the copied iterators return data from
// substring_rope_a, not substring_rope_b
VERIFY(*cit_copy == 'a');
VERIFY(*mit_copy == 'a');
VERIFY(*cit_assign == 'a');
VERIFY(*mit_assign == 'a');
return 0;