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89 lines
3.1 KiB
C++
89 lines
3.1 KiB
C++
// Boost.Convert library test and usage example
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// Copyright (c) 2009-2014 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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void
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test::algorithms()
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{
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boost::array<char const*, 5> strings = {{ "0XF", "0X10", "0X11", "0X12", "not int" }};
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std::vector<int> integers;
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std::vector<std::string> new_strings;
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boost::cstringstream_converter ccnv; // stringstream-based char converter
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////////////////////////////////////////////////////////////////////////////
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// String to integer conversion.
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// No explicit fallback, i.e. throws on failure. Hex formatting.
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////////////////////////////////////////////////////////////////////////////
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try
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{
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std::transform(
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strings.begin(),
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strings.end(),
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std::back_inserter(integers),
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boost::bind(boost::lexical_cast<int, std::string>, _1));
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BOOST_ASSERT(!"We should not be here");
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}
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catch (std::exception&)
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{
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// Expected behavior.
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printf("boost::lexical_cast processed: %d entries.\n", int(integers.size()));
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}
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try
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{
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std::transform(
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strings.begin(),
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strings.end(),
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std::back_inserter(integers),
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boost::convert<int>::from<std::string>(ccnv(std::hex)));
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BOOST_ASSERT(!"We should not be here");
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}
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catch (std::exception&)
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{
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// Expected behavior.
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printf("boost::convert processed: %d entries.\n", int(integers.size()));
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}
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BOOST_ASSERT(integers[0] == 15);
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BOOST_ASSERT(integers[1] == 16);
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BOOST_ASSERT(integers[2] == 17);
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BOOST_ASSERT(integers[3] == 18);
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integers.clear();
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////////////////////////////////////////////////////////////////////////////
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// String to integer conversion. Explicit fallback, i.e. no throwing. Hex formatting.
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////////////////////////////////////////////////////////////////////////////
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std::transform(
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strings.begin(),
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strings.end(),
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std::back_inserter(integers),
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boost::convert<int>::from<std::string>(ccnv(arg::base = cnv::base::hex)).value_or(-1));
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BOOST_ASSERT(integers[0] == 15);
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BOOST_ASSERT(integers[1] == 16);
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BOOST_ASSERT(integers[2] == 17);
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BOOST_ASSERT(integers[3] == 18);
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BOOST_ASSERT(integers[4] == -1); // Failed conversion
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////////////////////////////////////////////////////////////////////////////
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// int-to-string conversion. No explicit fallback value.
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////////////////////////////////////////////////////////////////////////////
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std::transform(
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integers.begin(),
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integers.end(),
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std::back_inserter(new_strings),
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boost::convert<std::string>::from<int>(ccnv(std::dec)));
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// for (size_t k = 0; k < new_strings.size(); ++k)
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// printf("%d. %s\n", int(k), new_strings[k].c_str());
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BOOST_ASSERT(new_strings[0] == "15");
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BOOST_ASSERT(new_strings[1] == "16");
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BOOST_ASSERT(new_strings[2] == "17");
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BOOST_ASSERT(new_strings[3] == "18");
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BOOST_ASSERT(new_strings[4] == "-1");
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} |