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// Copyright (C) 2016-2018 T. Zachary Laine
//
// 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 <boost/yap/expression.hpp>
#include <boost/assign/list_of.hpp>
#include <map>
#include <iostream>
#include <benchmark/benchmark.h>
template<typename Key, typename Value, typename Allocator>
struct map_list_of_transform
{
template<typename Fn, typename Key2, typename Value2>
auto operator()(
boost::yap::expr_tag<boost::yap::expr_kind::call>,
Fn const & fn,
Key2 && key,
Value2 && value)
{
boost::yap::transform(
boost::yap::as_expr<boost::yap::minimal_expr>(fn), *this);
map.emplace(
Key{std::forward<Key2 &&>(key)},
Value{std::forward<Value2 &&>(value)});
return 0;
}
std::map<Key, Value, Allocator> map;
};
template<boost::yap::expr_kind Kind, typename Tuple>
struct map_list_of_expr
{
static boost::yap::expr_kind const kind = Kind;
Tuple elements;
template<typename Key, typename Value, typename Allocator>
operator std::map<Key, Value, Allocator>() const
{
map_list_of_transform<Key, Value, Allocator> transform;
boost::yap::transform(*this, transform);
return transform.map;
}
BOOST_YAP_USER_CALL_OPERATOR(::map_list_of_expr)
};
struct map_list_of_tag
{};
auto map_list_of =
boost::yap::make_terminal<map_list_of_expr>(map_list_of_tag{});
std::map<std::string, int> make_map_with_boost_yap()
{
return map_list_of("<", 1)("<=", 2)(">", 3)(">=", 4)("=", 5)("<>", 6);
}
void BM_make_map_with_boost_yap(benchmark::State & state)
{
int i = 0;
while (state.KeepRunning()) {
{
std::map<std::string, int> map = make_map_with_boost_yap();
state.PauseTiming();
for (auto && x : map) {
i += x.second;
}
}
state.ResumeTiming();
}
std::cout << "Sum of ints in all maps made=" << i << "\n";
}
std::map<std::string, int> make_map_with_boost_assign()
{
return boost::assign::map_list_of("<", 1)("<=", 2)(">", 3)(">=", 4)("=", 5)(
"<>", 6);
}
void BM_make_map_with_boost_assign(benchmark::State & state)
{
int i = 0;
while (state.KeepRunning()) {
{
std::map<std::string, int> map = make_map_with_boost_assign();
state.PauseTiming();
for (auto && x : map) {
i += x.second;
}
}
state.ResumeTiming();
}
std::cout << "Sum of ints in all maps made=" << i << "\n";
}
std::map<std::string, int> make_map_manually()
{
std::map<std::string, int> retval;
retval.emplace("<", 1);
retval.emplace("<=", 2);
retval.emplace(">", 3);
retval.emplace(">=", 4);
retval.emplace("=", 5);
retval.emplace("<>", 6);
return retval;
}
void BM_make_map_manually(benchmark::State & state)
{
int i = 0;
while (state.KeepRunning()) {
{
std::map<std::string, int> map = make_map_manually();
state.PauseTiming();
for (auto && x : map) {
i += x.second;
}
}
state.ResumeTiming();
}
std::cout << "Sum of ints in all maps made=" << i << "\n";
}
std::map<std::string, int> make_map_inializer_list()
{
std::map<std::string, int> retval = {
{"<", 1}, {"<=", 2}, {">", 3}, {">=", 4}, {"=", 5}, {"<>", 6}};
return retval;
}
void BM_make_map_inializer_list(benchmark::State & state)
{
int i = 0;
while (state.KeepRunning()) {
{
std::map<std::string, int> map = make_map_inializer_list();
state.PauseTiming();
for (auto && x : map) {
i += x.second;
}
}
state.ResumeTiming();
}
std::cout << "Sum of ints in all maps made=" << i << "\n";
}
BENCHMARK(BM_make_map_with_boost_yap);
BENCHMARK(BM_make_map_with_boost_assign);
BENCHMARK(BM_make_map_manually);
BENCHMARK(BM_make_map_inializer_list);
BENCHMARK_MAIN()
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