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74abdd6973367255e7eccf2804705d840ddbda02
boost_unordered/test/unordered/erase_tests.cpp
Daniel James 74abdd6973 Replace boost::next with a simpler version 
Less optimized, but hopefully it won't cause any warnings.
2016-10-11 13:36:41 +01:00

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// Copyright 2006-2009 Daniel James.
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
#include "../helpers/prefix.hpp"
#include <boost/unordered_set.hpp>
#include <boost/unordered_map.hpp>
#include "../helpers/postfix.hpp"
#include "../helpers/test.hpp"
#include "../objects/test.hpp"
#include "../helpers/random_values.hpp"
#include "../helpers/tracker.hpp"
#include "../helpers/equivalent.hpp"
#include "../helpers/helpers.hpp"
#include "../helpers/invariants.hpp"
#include <vector>
#include <iostream>
#include <cstdlib>
namespace erase_tests
{
test::seed_t initialize_seed(85638);
template <class Container>
void erase_tests1(Container*, test::random_generator generator)
{
typedef BOOST_DEDUCED_TYPENAME Container::iterator iterator;
typedef BOOST_DEDUCED_TYPENAME Container::const_iterator c_iterator;
std::cerr<<"Erase by key.\n";
{
test::check_instances check_;
test::random_values<Container> v(1000, generator);
Container x(v.begin(), v.end());
int iterations = 0;
for(BOOST_DEDUCED_TYPENAME test::random_values<Container>::iterator
it = v.begin(); it != v.end(); ++it)
{
std::size_t count = x.count(test::get_key<Container>(*it));
std::size_t old_size = x.size();
BOOST_TEST(count == x.erase(test::get_key<Container>(*it)));
BOOST_TEST(x.size() == old_size - count);
BOOST_TEST(x.count(test::get_key<Container>(*it)) == 0);
BOOST_TEST(x.find(test::get_key<Container>(*it)) == x.end());
if (++iterations % 20 == 0) test::check_equivalent_keys(x);
}
}
std::cerr<<"erase(begin()).\n";
{
test::check_instances check_;
test::random_values<Container> v(1000, generator);
Container x(v.begin(), v.end());
std::size_t size = x.size();
int iterations = 0;
while(size > 0 && !x.empty())
{
BOOST_DEDUCED_TYPENAME Container::key_type
key = test::get_key<Container>(*x.begin());
std::size_t count = x.count(key);
iterator pos = x.erase(x.begin());
--size;
BOOST_TEST(pos == x.begin());
BOOST_TEST(x.count(key) == count - 1);
BOOST_TEST(x.size() == size);
if (++iterations % 20 == 0) test::check_equivalent_keys(x);
}
BOOST_TEST(x.empty());
}
std::cerr<<"erase(random position).\n";
{
test::check_instances check_;
test::random_values<Container> v(1000, generator);
Container x(v.begin(), v.end());
std::size_t size = x.size();
int iterations = 0;
while(size > 0 && !x.empty())
{
std::size_t index = test::random_value(x.size());
c_iterator prev, pos, next;
if(index == 0) {
prev = pos = x.begin();
}
else {
prev = test::next(x.begin(), index - 1);
pos = test::next(prev);
}
next = test::next(pos);
BOOST_DEDUCED_TYPENAME Container::key_type
key = test::get_key<Container>(*pos);
std::size_t count = x.count(key);
BOOST_TEST(count > 0);
BOOST_TEST(next == x.erase(pos));
--size;
if(size > 0)
BOOST_TEST(index == 0 ? next == x.begin() :
next == test::next(prev));
BOOST_TEST(x.count(key) == count - 1);
if (x.count(key) != count - 1) {
std::cerr << count << " => " << x.count(key) << std::endl;
}
BOOST_TEST(x.size() == size);
if (++iterations % 20 == 0) test::check_equivalent_keys(x);
}
BOOST_TEST(x.empty());
}
std::cerr<<"erase(ranges).\n";
{
test::check_instances check_;
test::random_values<Container> v(500, generator);
Container x(v.begin(), v.end());
std::size_t size = x.size();
// I'm actually stretching it a little here, as the standard says it
// returns 'the iterator immediately following the erase elements'
// and if nothing is erased, then there's nothing to follow. But I
// think this is the only sensible option...
BOOST_TEST(x.erase(x.end(), x.end()) == x.end());
BOOST_TEST(x.erase(x.begin(), x.begin()) == x.begin());
BOOST_TEST(x.size() == size);
test::check_equivalent_keys(x);
BOOST_TEST(x.erase(x.begin(), x.end()) == x.end());
BOOST_TEST(x.empty());
BOOST_TEST(x.begin() == x.end());
test::check_equivalent_keys(x);
BOOST_TEST(x.erase(x.begin(), x.end()) == x.begin());
test::check_equivalent_keys(x);
}
std::cerr<<"erase(random ranges).\n";
{
test::check_instances check_;
Container x;
for (int i = 0; i < 100; ++i) {
test::random_values<Container> v(1000, generator);
x.insert(v.begin(), v.end());
// Note that erase only invalidates the erased iterators.
std::vector<c_iterator> iterators;
for(c_iterator it = x.cbegin(); it != x.cend(); ++it) {
iterators.push_back(it);
}
iterators.push_back(x.cend());
while(iterators.size() > 1) {
std::size_t start = test::random_value(iterators.size());
std::size_t length = test::random_value(iterators.size() - start);
x.erase(iterators[start], iterators[start + length]);
iterators.erase(
test::next(iterators.begin(), start),
test::next(iterators.begin(), start + length));
BOOST_TEST(x.size() == iterators.size() - 1);
BOOST_DEDUCED_TYPENAME std::vector<c_iterator>::const_iterator
i2 = iterators.begin();
for(c_iterator i1 = x.cbegin(); i1 != x.cend(); ++i1) {
BOOST_TEST(i1 == *i2);
++i2;
}
BOOST_TEST(x.cend() == *i2);
test::check_equivalent_keys(x);
}
BOOST_TEST(x.empty());
}
}
std::cerr<<"quick_erase(begin()).\n";
{
test::check_instances check_;
test::random_values<Container> v(1000, generator);
Container x(v.begin(), v.end());
std::size_t size = x.size();
int iterations = 0;
while(size > 0 && !x.empty())
{
BOOST_DEDUCED_TYPENAME Container::key_type
key = test::get_key<Container>(*x.begin());
std::size_t count = x.count(key);
x.quick_erase(x.begin());
--size;
BOOST_TEST(x.count(key) == count - 1);
BOOST_TEST(x.size() == size);
if (++iterations % 20 == 0) test::check_equivalent_keys(x);
}
BOOST_TEST(x.empty());
}
std::cerr<<"quick_erase(random position).\n";
{
test::check_instances check_;
test::random_values<Container> v(1000, generator);
Container x(v.begin(), v.end());
std::size_t size = x.size();
int iterations = 0;
while(size > 0 && !x.empty())
{
std::size_t index = test::random_value(x.size());
BOOST_DEDUCED_TYPENAME Container::const_iterator prev, pos, next;
if(index == 0) {
prev = pos = x.begin();
}
else {
prev = test::next(x.begin(), index - 1);
pos = test::next(prev);
}
next = test::next(pos);
BOOST_DEDUCED_TYPENAME Container::key_type
key = test::get_key<Container>(*pos);
std::size_t count = x.count(key);
BOOST_TEST(count > 0);
x.quick_erase(pos);
--size;
if(size > 0)
BOOST_TEST(index == 0 ? next == x.begin() :
next == test::next(prev));
BOOST_TEST(x.count(key) == count - 1);
if (x.count(key) != count - 1) {
std::cerr << count << " => " << x.count(key) << std::endl;
}
BOOST_TEST(x.size() == size);
if (++iterations % 20 == 0) test::check_equivalent_keys(x);
}
BOOST_TEST(x.empty());
}
std::cerr<<"clear().\n";
{
test::check_instances check_;
test::random_values<Container> v(500, generator);
Container x(v.begin(), v.end());
x.clear();
BOOST_TEST(x.empty());
BOOST_TEST(x.begin() == x.end());
}
std::cerr<<"\n";
}
boost::unordered_set<test::object,
test::hash, test::equal_to,
test::allocator1<test::object> >* test_set;
boost::unordered_multiset<test::object,
test::hash, test::equal_to,
test::allocator2<test::object> >* test_multiset;
boost::unordered_map<test::object, test::object,
test::hash, test::equal_to,
test::allocator1<test::object> >* test_map;
boost::unordered_multimap<test::object, test::object,
test::hash, test::equal_to,
test::allocator2<test::object> >* test_multimap;
using test::default_generator;
using test::generate_collisions;
using test::limited_range;
UNORDERED_TEST(erase_tests1,
((test_set)(test_multiset)(test_map)(test_multimap))
((default_generator)(generate_collisions)(limited_range))
)
}
RUN_TESTS()
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