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/* Copyright (c) 1997-2024
Ewgenij Gawrilow, Michael Joswig, and the polymake team
Technische Universität Berlin, Germany
https://polymake.org
This program 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 2, or (at your option) any
later version: http://www.gnu.org/licenses/gpl.txt.
This program 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.
--------------------------------------------------------------------------------
*/
#pragma once
#if !defined(__clang__) && __GNUC__ >= 9
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wpessimizing-move"
#endif
namespace pm {
template <typename Iterator1, typename Iterator2>
void copy_range_impl(Iterator1&& src, Iterator2&& dst, std::true_type, std::false_type)
{
for (; !src.at_end(); ++src, ++dst) *dst=*src;
}
template <typename Iterator1, typename Iterator2>
void copy_range_impl(Iterator1&& src, Iterator2&& dst, std::false_type, std::true_type)
{
for (; !dst.at_end(); ++src, ++dst) *dst=*src;
}
template <typename Iterator1, typename Iterator2>
void copy_range_impl(Iterator1&& src, Iterator2&& dst, std::true_type, std::true_type)
{
for (; !src.at_end() && !dst.at_end(); ++src, ++dst) *dst=*src;
}
template <typename Iterator1, typename Iterator2,
typename=std::enable_if_t<check_iterator_feature<Iterator1, end_sensitive>::value ||
check_iterator_feature<Iterator2, end_sensitive>::value>>
private_mutable_t<Iterator2> copy_range(Iterator1&& src, Iterator2&& dst)
{
private_mutable_t<Iterator2> dst_it=ensure_private_mutable(std::forward<Iterator2>(dst));
copy_range_impl(ensure_private_mutable(std::forward<Iterator1>(src)), dst_it,
bool_constant<check_iterator_feature<Iterator1, end_sensitive>::value>(),
bool_constant<check_iterator_feature<Iterator2, end_sensitive>::value>());
return std::move(dst_it);
}
template <typename Iterator1, typename Iterator2>
bool equal_ranges_impl(Iterator1&& it1, Iterator2&& it2, std::true_type, std::false_type)
{
for (; !it1.at_end(); ++it1, ++it2)
if (*it1 != *it2) return false;
return true;
}
template <typename Iterator1, typename Iterator2>
bool equal_ranges_impl(Iterator1&& it1, Iterator2&& it2, std::false_type, std::true_type)
{
for (; !it2.at_end(); ++it1, ++it2)
if (*it1 != *it2) return false;
return true;
}
template <typename Iterator1, typename Iterator2>
bool equal_ranges_impl(Iterator1&& it1, Iterator2&& it2, std::true_type, std::true_type)
{
for (; !it1.at_end() && !it2.at_end(); ++it1, ++it2)
if (*it1 != *it2) return false;
return it1.at_end() && it2.at_end();
}
template <typename Iterator1, typename Iterator2,
typename=std::enable_if_t<check_iterator_feature<Iterator1, end_sensitive>::value ||
check_iterator_feature<Iterator2, end_sensitive>::value>>
bool equal_ranges(Iterator1&& it1, Iterator2&& it2)
{
return equal_ranges_impl(ensure_private_mutable(std::forward<Iterator1>(it1)),
ensure_private_mutable(std::forward<Iterator2>(it2)),
bool_constant<check_iterator_feature<Iterator1, end_sensitive>::value>(),
bool_constant<check_iterator_feature<Iterator2, end_sensitive>::value>());
}
template <typename Iterator1, typename Iterator2>
void swap_ranges_impl(Iterator1&& it1, Iterator2&& it2, std::true_type, std::false_type)
{
for (; !it1.at_end(); ++it1, ++it2) std::swap(*it1, *it2);
}
template <typename Iterator1, typename Iterator2>
void swap_ranges_impl(Iterator1&& it1, Iterator2&& it2, std::false_type, std::true_type)
{
for (; !it2.at_end(); ++it1, ++it2) std::swap(*it1, *it2);
}
template <typename Iterator1, typename Iterator2>
void swap_ranges_impl(Iterator1&& it1, Iterator2&& it2, std::true_type, std::true_type)
{
for (; !it1.at_end() && !it2.at_end(); ++it1, ++it2) std::swap(*it1, *it2);
}
template <typename Iterator1, typename Iterator2,
typename=std::enable_if_t<check_iterator_feature<Iterator1, end_sensitive>::value ||
check_iterator_feature<Iterator2, end_sensitive>::value>>
void swap_ranges(Iterator1&& it1, Iterator2&& it2)
{
swap_ranges_impl(ensure_private_mutable(std::forward<Iterator1>(it1)),
ensure_private_mutable(std::forward<Iterator2>(it2)),
bool_constant<check_iterator_feature<Iterator1, end_sensitive>::value>(),
bool_constant<check_iterator_feature<Iterator2, end_sensitive>::value>());
}
template <typename Iterator,
typename=std::enable_if_t<check_iterator_feature<Iterator, end_sensitive>::value>>
typename iterator_traits<Iterator>::value_type
first_differ_in_range(Iterator&& src, const typename iterator_traits<Iterator>::value_type& from)
{
auto&& it=ensure_private_mutable(std::forward<Iterator>(src));
for (; !it.at_end(); ++it) {
const typename iterator_traits<Iterator>::value_type v=*it;
if (v != from) return v;
}
return from;
}
template <typename Iterator, typename Value,
typename=std::enable_if_t<check_iterator_feature<Iterator, end_sensitive>::value>>
void fill_range(Iterator&& dst, const Value& x)
{
auto&& it=ensure_private_mutable(std::forward<Iterator>(dst));
for (; !it.at_end(); ++it) *it=x;
}
template <typename Iterator, typename Value,
typename=std::enable_if_t<check_iterator_feature<Iterator, end_sensitive>::value>>
private_mutable_t<Iterator>
find_in_range(Iterator&& src, const Value& x)
{
private_mutable_t<Iterator> it=ensure_private_mutable(std::forward<Iterator>(src));
while (!it.at_end() && *it != x) ++it;
return std::move(it);
}
template <typename Iterator, typename Predicate,
typename=std::enable_if_t<check_iterator_feature<Iterator, end_sensitive>::value>>
private_mutable_t<Iterator>
find_in_range_if(Iterator&& src, const Predicate& pred_arg)
{
typedef pm::unary_helper<pure_type_t<Iterator>, Predicate> helper;
const typename helper::operation& pred=helper::create(pred_arg);
private_mutable_t<Iterator> it=ensure_private_mutable(std::forward<Iterator>(src));
while (!it.at_end() && !pred(*helper::get(it))) ++it;
return std::move(it);
}
} // end namespace pm
#if !defined(__clang__) && __GNUC__ >= 9
#pragma GCC diagnostic pop
#endif
// Local Variables:
// mode:C++
// c-basic-offset:3
// indent-tabs-mode:nil
// End:
|
