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// Boost.Geometry (aka GGL, Generic Geometry Library)
// Unit Test
// Copyright (c) 2014-2021, Oracle and/or its affiliates.
// Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
// Licensed under the Boost Software License version 1.0.
// http://www.boost.org/users/license.html
#ifndef BOOST_TEST_MODULE
#define BOOST_TEST_MODULE test_flatten_iterator
#endif
#include <boost/test/included/unit_test.hpp>
#include <algorithm>
#include <cstddef>
#include <iostream>
#include <iterator>
#include <list>
#include <string>
#include <sstream>
#include <type_traits>
#include <vector>
#include <boost/assign/std/vector.hpp>
#include <boost/assign/std/list.hpp>
#include <boost/core/ignore_unused.hpp>
#include <boost/geometry/iterators/flatten_iterator.hpp>
#include "test_iterator_common.hpp"
using namespace boost::assign;
template <typename InnerContainer>
struct access_begin
{
using return_type = std::conditional_t
<
std::is_const<InnerContainer>::value,
typename InnerContainer::const_iterator,
typename InnerContainer::iterator
>;
static inline return_type apply(InnerContainer& inner)
{
return inner.begin();
}
};
template <typename InnerContainer>
struct access_end
{
using return_type = std::conditional_t
<
std::is_const<InnerContainer>::value,
typename InnerContainer::const_iterator,
typename InnerContainer::iterator
>;
static inline return_type apply(InnerContainer& inner)
{
return inner.end();
}
};
template <typename NestedContainer>
inline std::size_t number_of_elements(NestedContainer const& c)
{
std::size_t num_elements(0);
for (typename NestedContainer::const_iterator outer = c.begin();
outer != c.end(); ++outer)
{
num_elements += outer->size();
}
return num_elements;
}
struct test_flatten_iterator
{
template
<
typename FlattenIterator,
typename ConstFlattenIterator,
typename NestedContainer
>
static inline
void test_using_max_element(FlattenIterator first,
FlattenIterator beyond,
ConstFlattenIterator const_first,
ConstFlattenIterator const_beyond,
NestedContainer const& c)
{
typedef typename std::iterator_traits
<
FlattenIterator
>::value_type value_type;
typedef typename NestedContainer::const_iterator const_outer_iterator;
typedef typename NestedContainer::value_type inner_container;
typedef typename inner_container::const_iterator const_inner_iterator;
if ( first == beyond )
{
return;
}
FlattenIterator it_max = std::max_element(first, beyond);
ConstFlattenIterator const_it_max =
std::max_element(const_first, const_beyond);
BOOST_CHECK( it_max == const_it_max );
BOOST_CHECK( *it_max == *const_it_max );
value_type old_value = *const_first;
value_type new_value = *it_max + 1;
*first = *it_max + 1;
const_outer_iterator outer = c.begin();
while ( outer->begin() == outer->end() )
{
++outer;
}
const_inner_iterator inner = outer->begin();
BOOST_CHECK( *inner == new_value );
#ifdef BOOST_GEOMETRY_TEST_DEBUG
std::cout << std::endl;
std::cout << "modified 1st element of 1st non-empty "
<< "inner container:" << std::endl;
print_nested_container(std::cout, c.begin(), c.end(), "nested :")
<< std::endl;
print_container(std::cout, first, beyond, "flattened:") << std::endl;
#endif
*first = old_value;
BOOST_CHECK( *inner == old_value );
}
template <typename NestedContainer>
static inline void apply(NestedContainer& c,
std::string const& case_id,
std::string const& container_id)
{
boost::ignore_unused(case_id, container_id);
#ifdef BOOST_GEOMETRY_TEST_DEBUG
std::stringstream sstream;
sstream << case_id << " [" << container_id << "]";
std::cout << "case id: " << sstream.str() << std::endl;
#endif
typedef typename NestedContainer::const_iterator const_outer_iterator;
typedef typename NestedContainer::iterator outer_iterator;
typedef typename NestedContainer::value_type inner_container;
typedef typename inner_container::const_iterator const_inner_iterator;
typedef typename inner_container::iterator inner_iterator;
typedef boost::geometry::flatten_iterator
<
const_outer_iterator,
const_inner_iterator,
typename inner_container::value_type const,
access_begin<inner_container const>,
access_end<inner_container const>
> const_flatten_iterator;
typedef boost::geometry::flatten_iterator
<
outer_iterator,
inner_iterator,
typename inner_container::value_type,
access_begin<inner_container>,
access_end<inner_container>
> flatten_iterator;
typedef typename std::iterator_traits
<
flatten_iterator
>::value_type value_type;
flatten_iterator begin(c.begin(), c.end());
flatten_iterator end(c.end());
const_flatten_iterator const_begin(begin);
const_flatten_iterator const_end(end);
const_begin = begin;
const_end = end;
// test copying, dereferencing and element equality
std::vector<value_type> combined;
for (const_outer_iterator outer = c.begin();
outer != c.end(); ++outer)
{
std::copy(outer->begin(), outer->end(),
std::back_inserter(combined));
}
test_equality(begin, end, combined);
test_equality(const_begin, const_end, combined);
combined.clear();
std::copy(begin, end, std::back_inserter(combined));
test_equality(begin, end, combined);
test_equality(const_begin, const_end, combined);
combined.clear();
std::copy(const_begin, const_end, std::back_inserter(combined));
test_equality(begin, end, combined);
test_equality(const_begin, const_end, combined);
// test sizes (and std::distance)
test_size(begin, end, combined);
test_size(const_begin, const_end, combined);
#ifdef BOOST_GEOMETRY_TEST_DEBUG
print_nested_container(std::cout, c.begin(), c.end(), "nested :")
<< std::endl;
print_container(std::cout, begin, end, "flattened :")
<< std::endl;
if ( begin != end )
{
std::cout << "min element: "
<< *std::min_element(begin, end)
<< std::endl;
std::cout << "max element: "
<< *std::max_element(const_begin, const_end)
<< std::endl;
}
#endif
// perform reversals (std::reverse)
test_using_reverse(begin, end, combined);
// test std::max_element, dereferencing and value assigment
test_using_max_element(begin, end, const_begin, const_end, c);
// test std::count_if / std::remove_if
test_using_remove_if(begin, end, combined);
#ifdef BOOST_GEOMETRY_TEST_DEBUG
std::cout << "====================" << std::endl << std::endl;
#endif
}
};
// the actual test cases -- START
template <int CaseNumber>
struct test_case_per_container;
template<>
struct test_case_per_container<0>
{
template <typename NestedContainer>
static inline void apply(std::string const& case_id,
std::string const& container_id)
{
NestedContainer c;
test_flatten_iterator::apply(c, case_id, container_id);
}
};
template<>
struct test_case_per_container<1>
{
template <typename NestedContainer>
static inline void apply(std::string const& case_id,
std::string const& container_id)
{
NestedContainer c;
for (int i = 0; i < 5; ++i)
{
c += typename NestedContainer::value_type();
}
test_flatten_iterator::apply(c, case_id, container_id);
}
};
template<>
struct test_case_per_container<2>
{
template <typename NestedContainer>
static inline void apply(std::string const& case_id,
std::string const& container_id)
{
NestedContainer c;
typename NestedContainer::value_type ic[4];
ic[0] += 5,4,3,2,1;
ic[1] += 6,7,8;
ic[2] += 9;
ic[3] += 9,8,7,6,5;
c += ic[0],ic[1],ic[2],ic[3];
test_flatten_iterator::apply(c, case_id, container_id);
}
};
template<>
struct test_case_per_container<3>
{
template <typename NestedContainer>
static inline void apply(std::string const& case_id,
std::string const& container_id)
{
NestedContainer c;
typename NestedContainer::value_type ic[20];
ic[2] += 5,4,3,2,1;
ic[3] += 6,7,8;
ic[8] += 9;
ic[9] += 9,8,7,6,5;
ic[14] += 4,3,2,1;
for (std::size_t i = 0; i < 20; ++i)
{
c += ic[i];
}
test_flatten_iterator::apply(c, case_id, container_id);
}
};
// the actual test cases -- END
template <int CaseNumber>
inline void test_case_all_containers(std::string const& case_id)
{
typedef typename std::vector<std::vector<int> > VV;
typedef typename std::vector<std::list<int> > VL;
typedef typename std::list<std::vector<int> > LV;
typedef typename std::list<std::list<int> > LL;
#ifdef BOOST_GEOMETRY_TEST_DEBUG
std::cout << std::endl << std::endl;
#endif
test_case_per_container<CaseNumber>::template apply<VV>(case_id, "VV");
test_case_per_container<CaseNumber>::template apply<VL>(case_id, "VL");
test_case_per_container<CaseNumber>::template apply<LV>(case_id, "LV");
test_case_per_container<CaseNumber>::template apply<LL>(case_id, "LL");
#ifdef BOOST_GEOMETRY_TEST_DEBUG
std::cout << std::endl;
std::cout << "********************************************************"
<< std::endl << std::endl;
#endif
}
BOOST_AUTO_TEST_CASE( test_flatten_iterator_all )
{
test_case_all_containers<0>("empty");
test_case_all_containers<1>("case1");
test_case_all_containers<2>("case2");
test_case_all_containers<3>("case3");
}
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