73 lines
2.6 KiB
C++
73 lines
2.6 KiB
C++
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// Boost.Convert test and usage example
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// Copyright (c) 2009-2020 Vladimir Batov.
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// Use, modification and distribution are subject to the Boost Software License,
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// Version 1.0. See http://www.boost.org/LICENSE_1_0.txt.
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#include "./test.hpp"
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#if !defined(BOOST_CONVERT_CXX14)
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int main(int, char const* []) { return 0; }
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#else
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#include <boost/convert.hpp>
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#include <boost/convert/printf.hpp>
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#include <boost/test/tools/floating_point_comparison.hpp>
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using std::string;
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using boost::convert;
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namespace cnv = boost::cnv;
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namespace arg = boost::cnv::parameter;
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static
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void
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test_notation()
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{
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//[printf_notation
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boost::cnv::printf cnv;
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BOOST_TEST( "-3.14159" == convert<string>(-3.14159, cnv(arg::notation = cnv::notation::fixed)(arg::precision = 5)).value());
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BOOST_TEST( "-3.142e+00" == convert<string>(-3.14159, cnv(arg::notation = cnv::notation::scientific)(arg::precision = 3)).value());
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BOOST_TEST("-0x1.9220p+1" == convert<string>(-3.14159, cnv(arg::notation = cnv::notation::hex)(arg::precision = 4)).value());
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const auto close = boost::math::fpc::close_at_tolerance<double>(1);
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BOOST_TEST_WITH(-3.14159, convert<double>("-3.14159", cnv(arg::notation = cnv::notation::fixed)).value(), close);
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BOOST_TEST_WITH(-3.14159, convert<double>("-3.142e+00", cnv(arg::notation = cnv::notation::scientific)).value(), close);
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BOOST_TEST_WITH(-3.14159, convert<double>("-0x1.9220p+1", cnv(arg::notation = cnv::notation::hex)).value(), close);
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//]
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}
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int
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main(int, char const* [])
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{
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boost::cnv::printf cnv;
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string const not_int_str = "not an int";
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string const std_str = "-11";
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char const* const c_str = "-12";
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BOOST_TEST( -1 == convert<int>(not_int_str, cnv).value_or(-1));
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BOOST_TEST(-11 == convert<int>(std_str, cnv).value_or(-1));
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BOOST_TEST(-12 == convert<int>(c_str, cnv).value_or(-1));
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BOOST_TEST( float(3.14) == convert< float>("3.14", cnv(arg::precision = 2)).value_or(-1));
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BOOST_TEST(double(3.14) == convert<double>("3.14", cnv(arg::precision = 2)).value_or(-1));
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BOOST_TEST("255" == convert<std::string>(255, cnv(arg::base = boost::cnv::base::dec)).value());
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BOOST_TEST( "ff" == convert<std::string>(255, cnv(arg::base = boost::cnv::base::hex)).value());
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BOOST_TEST("377" == convert<std::string>(255, cnv(arg::base = boost::cnv::base::oct)).value());
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string s01 = convert<string>(12.3456, cnv(arg::precision = 6)).value();
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string s02 = convert<string>(12.3456, cnv(arg::precision = 3)).value();
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BOOST_TEST(s01 == "12.345600");
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BOOST_TEST(s02 == "12.346");
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test_notation();
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return boost::report_errors();
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}
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#endif
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