| // Copyright (C) 2019-2021 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 |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // 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 |
| // <http://www.gnu.org/licenses/>. |
| |
| // { dg-options "-std=gnu++2a" } |
| // { dg-do run { target c++2a } } |
| |
| #include <iterator> |
| #include <testsuite_hooks.h> |
| #include <testsuite_iterators.h> |
| |
| using __gnu_test::test_range; |
| using __gnu_test::test_sized_range; |
| using __gnu_test::random_access_iterator_wrapper; |
| using __gnu_test::bidirectional_iterator_wrapper; |
| using __gnu_test::forward_iterator_wrapper; |
| using __gnu_test::input_iterator_wrapper; |
| using __gnu_test::output_iterator_wrapper; |
| |
| void |
| test01() |
| { |
| int a[10] = { }; |
| VERIFY( std::ranges::distance(a) == 10 ); |
| |
| test_range<int, random_access_iterator_wrapper> c(a); |
| VERIFY( std::ranges::distance(c) == 10 ); |
| |
| auto b = c.begin(); |
| auto e = c.end(); |
| auto ei = std::ranges::next(b, e); |
| VERIFY( std::ranges::distance(b, e) == 10 ); |
| VERIFY( std::ranges::distance(ei, b) == -10 ); |
| |
| const auto cb = b; |
| const auto ce = e; |
| const auto cei = ei; |
| VERIFY( std::ranges::distance(cb, ce) == 10 ); |
| VERIFY( std::ranges::distance(cei, cb) == -10 ); |
| |
| test_sized_range<int, random_access_iterator_wrapper> c2(a); |
| VERIFY( std::ranges::distance(c2) == 10 ); |
| } |
| |
| void |
| test02() |
| { |
| int a[2] = { }; |
| VERIFY( std::ranges::distance(a) == 2 ); |
| |
| test_range<int, bidirectional_iterator_wrapper> c(a); |
| VERIFY( std::ranges::distance(c) == 2 ); |
| |
| auto b = c.begin(); |
| auto e = c.end(); |
| VERIFY( std::ranges::distance(b, e) == 2 ); |
| |
| const auto cb = b; |
| const auto ce = e; |
| VERIFY( std::ranges::distance(cb, ce) == 2 ); |
| |
| test_sized_range<int, bidirectional_iterator_wrapper> c2(a); |
| VERIFY( std::ranges::distance(c2) == 2 ); |
| } |
| |
| void |
| test03() |
| { |
| int a[3] = { }; |
| test_range<int, forward_iterator_wrapper> c(a); |
| VERIFY( std::ranges::distance(c) == 3 ); |
| |
| auto b = c.begin(); |
| auto e = c.end(); |
| VERIFY( std::ranges::distance(b, e) == 3 ); |
| |
| const auto cb = b; |
| const auto ce = e; |
| VERIFY( std::ranges::distance(cb, ce) == 3 ); |
| |
| test_sized_range<int, forward_iterator_wrapper> c2(a); |
| VERIFY( std::ranges::distance(c2) == 3 ); |
| } |
| |
| void |
| test04() |
| { |
| int a[4] = { }; |
| test_range<int, input_iterator_wrapper> c(a); |
| static_assert( std::ranges::range<decltype(c)> ); |
| |
| VERIFY( std::ranges::distance(c) == 4 ); |
| // first call to distance has traversed the range: |
| VERIFY( std::ranges::distance(c) == 0 ); |
| |
| c = test_range<int, input_iterator_wrapper>(a); |
| auto b = c.begin(); |
| auto e = c.end(); |
| VERIFY( std::ranges::distance(b, e) == 4 ); |
| |
| test_range<int, input_iterator_wrapper> c2(a); |
| const auto cb = c2.begin(); |
| const auto ce = c2.end(); |
| VERIFY( std::ranges::distance(cb, ce) == 4 ); |
| |
| test_sized_range<int, input_iterator_wrapper> c3(a); |
| VERIFY( std::ranges::distance(c3) == 4 ); |
| // first call to distance just called size() without affecting the range: |
| VERIFY( std::ranges::distance(c3) == 4 ); |
| } |
| |
| void |
| test05() |
| { |
| int a[5] = { }; |
| test_range<int, output_iterator_wrapper> c(a); |
| VERIFY( std::ranges::distance(c) == 5 ); |
| |
| test_range<int, output_iterator_wrapper> c2(a); |
| auto b = c2.begin(); |
| auto e = c2.end(); |
| VERIFY( std::ranges::distance(b, e) == 5 ); |
| |
| test_range<int, output_iterator_wrapper> c3(a); |
| const auto cb = c3.begin(); |
| const auto ce = c3.end(); |
| VERIFY( std::ranges::distance(cb, ce) == 5 ); |
| |
| test_sized_range<int, output_iterator_wrapper> c4(a); |
| VERIFY( std::ranges::distance(c4) == 5 ); |
| // first call to distance just called size() without affecting the range: |
| VERIFY( std::ranges::distance(c4) == 5 ); |
| } |
| |
| int |
| main() |
| { |
| test01(); |
| test02(); |
| test03(); |
| test04(); |
| test05(); |
| } |