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// Boost.Convert test and usage example
// Copyright (c) 2009-2020 Vladimir Batov.
// Use, modification and distribution are subject to the Boost Software License,
// Version 1.0. See http://www.boost.org/LICENSE_1_0.txt.
// This code has been adapted from libs/spirit/optimization/qi/int_parser.cpp.
// This code uses the performance testing framework from libs/spirit/optimization/measure.cpp.
// See these mentioned files for the copyright notice.
#include "./test.hpp"
#if !defined(BOOST_CONVERT_CXX14)
int main(int, char const* []) { return 0; }
#else
#include "./prepare.hpp"
#include <boost/convert.hpp>
#include <boost/convert/spirit.hpp>
#include <boost/convert/strtol.hpp>
#include <boost/convert/lexical_cast.hpp>
#include <libs/spirit/workbench/measure.hpp>
#include <vector>
namespace
{
namespace local
{
struct base : test::base
{
base() : strings_(local::get_strs()) {}
// Test strings are created as part of the object, i.e. on the stack to make sure
// they are easily accessed.
local::strings strings_;
};
}
struct raw_lxcast_str_to_int_test : local::base
{
void benchmark()
{
for (size_t i = 0; i < strings_.size(); ++i)
this->val += boost::lexical_cast<int>(strings_[i].c_str());
}
};
struct cnv_lxcast_str_to_int_test : local::base
{
void benchmark()
{
for (size_t i = 0; i < strings_.size(); ++i)
this->val += boost::convert<int>(strings_[i].c_str(), cnv).value();
}
boost::cnv::lexical_cast cnv;
};
struct raw_spirit_str_to_int_test : local::base
{
static int parse(char const* str)
{
char const* beg = str;
char const* end = beg + strlen(str);
int n;
if (boost::spirit::qi::parse(beg, end, boost::spirit::qi::int_, n))
if (beg == end)
return n;
return (BOOST_ASSERT(0), 0);
}
void benchmark()
{
for (size_t i = 0; i < strings_.size(); ++i)
this->val += parse(strings_[i].c_str());
}
};
struct cnv_spirit_str_to_int_test : local::base
{
void benchmark()
{
for (size_t i = 0; i < strings_.size(); ++i)
this->val += boost::convert<int>(strings_[i].c_str(), cnv).value();
}
boost::cnv::spirit cnv;
};
}
int
main(int, char const* [])
{
// This code has been adapted from libs/spirit/optimization/qi/int_parser.cpp.
// This code uses the performance testing framework from libs/spirit/optimization/measure.cpp.
// See these mentioned files for the copyright notice.
BOOST_SPIRIT_TEST_BENCHMARK(
10000000, // This is the maximum repetitions to execute
(raw_lxcast_str_to_int_test)
(cnv_lxcast_str_to_int_test)
(raw_spirit_str_to_int_test)
(cnv_spirit_str_to_int_test)
)
// This is ultimately responsible for preventing all the test code
// from being optimized away. Change this to return 0 and you
// unplug the whole test's life support system.
return test::live_code != 0;
}
#endif
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