boost/libs/lexical_cast/test/lexical_cast_test.cpp

//  Unit test for boost::lexical_cast.
//
//  See http://www.boost.org for most recent version, including documentation.
//
//  Copyright Terje Sletteb and Kevlin Henney, 2005.
//  Copyright Alexander Nasonov, 2006.
//  Copyright Antony Polukhin, 2011-2012.
//
//  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).
//
// Note: The unit test no longer compile on MSVC 6, but lexical_cast itself works for it.

//
// We need this #define before any #includes: otherwise msvc will emit warnings
// deep within std::string, resulting from our (perfectly legal) use of basic_string
// with a custom traits class:
//
#define _SCL_SECURE_NO_WARNINGS

#include <boost/config.hpp>

#if defined(__INTEL_COMPILER)
#pragma warning(disable: 193 383 488 981 1418 1419)
#elif defined(BOOST_MSVC)
#pragma warning(disable: 4097 4100 4121 4127 4146 4244 4245 4511 4512 4701 4800)
#endif

#include <boost/lexical_cast.hpp>

#include <boost/cstdint.hpp>
#include <boost/test/unit_test.hpp>
#include <boost/test/floating_point_comparison.hpp>

#include <boost/type_traits/integral_promotion.hpp>
#include <string>
#include <vector>
#include <algorithm> // std::transform
#include <memory>

#if (defined(BOOST_HAS_LONG_LONG) || defined(BOOST_HAS_MS_INT64)) \
    && !(defined(BOOST_MSVC) && BOOST_MSVC < 1300)
#define LCAST_TEST_LONGLONG
#endif

#if defined(BOOST_NO_STRINGSTREAM) || defined(BOOST_NO_STD_WSTRING)
#define BOOST_LCAST_NO_WCHAR_T
#endif

template<class CharT>
struct my_traits : std::char_traits<CharT>
{
};

template<class CharT>
struct my_allocator : std::allocator<CharT>
{
    typedef std::allocator<CharT> base_t;

    my_allocator(){}
    template <class U> my_allocator(const my_allocator<U>& v) : base_t(v) {}

    template <class U> struct rebind { typedef my_allocator<U> other; };
};

using namespace boost;

void test_conversion_to_char();
void test_conversion_to_int();
void test_conversion_to_double();
void test_conversion_to_bool();
void test_conversion_with_nonconst_char();
void test_conversion_to_string();
void test_conversion_from_to_wchar_t_alias();
void test_conversion_from_wchar_t();
void test_conversion_to_wchar_t();
void test_conversion_from_wstring();
void test_conversion_to_wstring();
void test_bad_lexical_cast();
void test_no_whitespace_stripping();
void test_volatile_types_conversions();
#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
void test_traits();
void test_wtraits();
void test_allocator();
void test_wallocator();
#endif
void test_char_types_conversions();
void operators_overload_test();
#if !defined(BOOST_NO_CXX11_CHAR16_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS)
void test_char16_conversions();
#endif
#if !defined(BOOST_NO_CXX11_CHAR32_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS)
void test_char32_conversions();
#endif
void test_getting_pointer_to_function();

unit_test::test_suite *init_unit_test_suite(int, char *[])
{
    unit_test::test_suite *suite =
        BOOST_TEST_SUITE("lexical_cast unit test");
    suite->add(BOOST_TEST_CASE(test_conversion_to_char));
    suite->add(BOOST_TEST_CASE(test_conversion_to_int));
    suite->add(BOOST_TEST_CASE(test_conversion_to_double));
    suite->add(BOOST_TEST_CASE(test_conversion_to_bool));
    suite->add(BOOST_TEST_CASE(test_conversion_from_to_wchar_t_alias));
    suite->add(BOOST_TEST_CASE(test_conversion_to_string));
    suite->add(BOOST_TEST_CASE(test_conversion_with_nonconst_char));
#ifndef BOOST_LCAST_NO_WCHAR_T
    suite->add(BOOST_TEST_CASE(test_conversion_from_wchar_t));
    suite->add(BOOST_TEST_CASE(test_conversion_to_wchar_t));
    suite->add(BOOST_TEST_CASE(test_conversion_from_wstring));
    suite->add(BOOST_TEST_CASE(test_conversion_to_wstring));
#endif
    suite->add(BOOST_TEST_CASE(test_bad_lexical_cast));
    suite->add(BOOST_TEST_CASE(test_no_whitespace_stripping));
    suite->add(BOOST_TEST_CASE(test_volatile_types_conversions));
#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
    suite->add(BOOST_TEST_CASE(&test_traits));
    suite->add(BOOST_TEST_CASE(&test_wtraits));
    suite->add(BOOST_TEST_CASE(&test_allocator));
    suite->add(BOOST_TEST_CASE(&test_wallocator));
#endif

    suite->add(BOOST_TEST_CASE(&test_char_types_conversions));
    suite->add(BOOST_TEST_CASE(&operators_overload_test));
#if !defined(BOOST_NO_CXX11_CHAR16_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS)
    suite->add(BOOST_TEST_CASE(&test_char16_conversions));
#endif
#if !defined(BOOST_NO_CXX11_CHAR32_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS)
    suite->add(BOOST_TEST_CASE(&test_char32_conversions));
#endif
    suite->add(BOOST_TEST_CASE(&test_getting_pointer_to_function));

    return suite;
}

void test_conversion_to_char()
{
    BOOST_CHECK_EQUAL('A', lexical_cast<char>('A'));
    BOOST_CHECK_EQUAL(' ', lexical_cast<char>(' '));
    BOOST_CHECK_EQUAL('1', lexical_cast<char>(1));
    BOOST_CHECK_EQUAL('0', lexical_cast<char>(0));
    BOOST_CHECK_THROW(lexical_cast<char>(123), bad_lexical_cast);
    BOOST_CHECK_EQUAL('1', lexical_cast<char>(1.0));
    BOOST_CHECK_EQUAL('1', lexical_cast<char>(true));
    BOOST_CHECK_EQUAL('0', lexical_cast<char>(false));
    BOOST_CHECK_EQUAL('A', lexical_cast<char>("A"));
    BOOST_CHECK_EQUAL(' ', lexical_cast<char>(" "));
    BOOST_CHECK_THROW(lexical_cast<char>(""), bad_lexical_cast);
    BOOST_CHECK_THROW(lexical_cast<char>("Test"), bad_lexical_cast);
    BOOST_CHECK_EQUAL('A', lexical_cast<char>(std::string("A")));
    BOOST_CHECK_EQUAL(' ', lexical_cast<char>(std::string(" ")));
    BOOST_CHECK_THROW(
        lexical_cast<char>(std::string("")), bad_lexical_cast);
    BOOST_CHECK_THROW(
        lexical_cast<char>(std::string("Test")), bad_lexical_cast);
}

void test_conversion_to_int()
{
    BOOST_CHECK_EQUAL(1, lexical_cast<int>('1'));
    BOOST_CHECK_EQUAL(0, lexical_cast<int>('0'));
    BOOST_CHECK_THROW(lexical_cast<int>('A'), bad_lexical_cast);
    BOOST_CHECK_EQUAL(1, lexical_cast<int>(1));
    BOOST_CHECK_EQUAL(1, lexical_cast<int>(1.0));

    BOOST_CHECK_EQUAL(
        (std::numeric_limits<int>::max)(),
        lexical_cast<int>((std::numeric_limits<int>::max)()));

    BOOST_CHECK_EQUAL(
        (std::numeric_limits<int>::min)(),
        lexical_cast<int>((std::numeric_limits<int>::min)()));

    BOOST_CHECK_THROW(lexical_cast<int>(1.23), bad_lexical_cast);

    BOOST_CHECK_THROW(lexical_cast<int>(1e20), bad_lexical_cast);
    BOOST_CHECK_EQUAL(1, lexical_cast<int>(true));
    BOOST_CHECK_EQUAL(0, lexical_cast<int>(false));
    BOOST_CHECK_EQUAL(123, lexical_cast<int>("123"));
    BOOST_CHECK_THROW(
        lexical_cast<int>(" 123"), bad_lexical_cast);
    BOOST_CHECK_THROW(lexical_cast<int>(""), bad_lexical_cast);
    BOOST_CHECK_THROW(lexical_cast<int>("Test"), bad_lexical_cast);
    BOOST_CHECK_EQUAL(123, lexical_cast<int>("123"));
    BOOST_CHECK_EQUAL(123, lexical_cast<int>(std::string("123")));
    BOOST_CHECK_THROW(
        lexical_cast<int>(std::string(" 123")), bad_lexical_cast);
    BOOST_CHECK_THROW(
        lexical_cast<int>(std::string("")), bad_lexical_cast);
    BOOST_CHECK_THROW(
        lexical_cast<int>(std::string("Test")), bad_lexical_cast);
}

void test_conversion_with_nonconst_char()
{
    std::vector<char> buffer;
    buffer.push_back('1');
    buffer.push_back('\0');
    BOOST_CHECK_EQUAL(boost::lexical_cast<int>(&buffer[0]), 1);

    std::vector<unsigned char> buffer2;
    buffer2.push_back('1');
    buffer2.push_back('\0');
    BOOST_CHECK_EQUAL(boost::lexical_cast<int>(&buffer2[0]), 1);

    std::vector<unsigned char> buffer3;
    buffer3.push_back('1');
    buffer3.push_back('\0');
    BOOST_CHECK_EQUAL(boost::lexical_cast<int>(&buffer3[0]), 1);

#ifndef BOOST_LCAST_NO_WCHAR_T
    std::vector<wchar_t> buffer4;
    buffer4.push_back(L'1');
    buffer4.push_back(L'\0');
    BOOST_CHECK_EQUAL(boost::lexical_cast<int>(&buffer4[0]), 1);
#endif
}

void test_conversion_to_double()
{
    BOOST_CHECK_CLOSE_FRACTION(1.0, lexical_cast<double>('1'), (std::numeric_limits<double>::epsilon()));
    BOOST_CHECK_THROW(lexical_cast<double>('A'), bad_lexical_cast);
    BOOST_CHECK_CLOSE_FRACTION(1.0, lexical_cast<double>(1), (std::numeric_limits<double>::epsilon()));
    BOOST_CHECK_CLOSE_FRACTION(1.23, lexical_cast<double>(1.23), (std::numeric_limits<double>::epsilon()));
    BOOST_CHECK_CLOSE_FRACTION(1.234567890, lexical_cast<double>(1.234567890), std::numeric_limits<double>::epsilon());
    BOOST_CHECK_CLOSE_FRACTION(1.234567890, lexical_cast<double>("1.234567890"), std::numeric_limits<double>::epsilon());
    BOOST_CHECK_CLOSE_FRACTION(1.0, lexical_cast<double>(true), (std::numeric_limits<double>::epsilon()));
    BOOST_CHECK_CLOSE_FRACTION(0.0, lexical_cast<double>(false), (std::numeric_limits<double>::epsilon()));
    BOOST_CHECK_CLOSE_FRACTION(1.23, lexical_cast<double>("1.23"), (std::numeric_limits<double>::epsilon()));
    BOOST_CHECK_THROW(lexical_cast<double>(""), bad_lexical_cast);
    BOOST_CHECK_THROW(lexical_cast<double>("Test"), bad_lexical_cast);
    BOOST_CHECK_CLOSE_FRACTION(1.23, lexical_cast<double>(std::string("1.23")), (std::numeric_limits<double>::epsilon()));
    BOOST_CHECK_THROW(
        lexical_cast<double>(std::string("")), bad_lexical_cast);
    BOOST_CHECK_THROW(
        lexical_cast<double>(std::string("Test")), bad_lexical_cast);
}

void test_conversion_to_bool()
{
    BOOST_CHECK_EQUAL(true, lexical_cast<bool>('1'));
    BOOST_CHECK_EQUAL(false, lexical_cast<bool>('0'));
    BOOST_CHECK_THROW(lexical_cast<bool>('A'), bad_lexical_cast);
    BOOST_CHECK_EQUAL(true, lexical_cast<bool>(1));
    BOOST_CHECK_EQUAL(false, lexical_cast<bool>(0));
    BOOST_CHECK_THROW(lexical_cast<bool>(123), bad_lexical_cast);
    BOOST_CHECK_EQUAL(true, lexical_cast<bool>(1.0));
    BOOST_CHECK_THROW(lexical_cast<bool>(-123), bad_lexical_cast);
    BOOST_CHECK_EQUAL(false, lexical_cast<bool>(0.0));
    BOOST_CHECK_THROW(lexical_cast<bool>(1234), bad_lexical_cast);
#if !defined(_CRAYC)
    // Looks like a bug in CRAY compiler (throws bad_lexical_cast)
    // TODO: localize the bug and report it to developers.
    BOOST_CHECK_EQUAL(true, lexical_cast<bool>(true));
    BOOST_CHECK_EQUAL(false, lexical_cast<bool>(false));
#endif
    BOOST_CHECK_EQUAL(true, lexical_cast<bool>("1"));
    BOOST_CHECK_EQUAL(false, lexical_cast<bool>("0"));
    BOOST_CHECK_THROW(lexical_cast<bool>(""), bad_lexical_cast);
    BOOST_CHECK_THROW(lexical_cast<bool>("Test"), bad_lexical_cast);
    BOOST_CHECK_EQUAL(true, lexical_cast<bool>("1"));
    BOOST_CHECK_EQUAL(false, lexical_cast<bool>("0"));
    BOOST_CHECK_EQUAL(true, lexical_cast<bool>(std::string("1")));
    BOOST_CHECK_EQUAL(false, lexical_cast<bool>(std::string("0")));

    BOOST_CHECK_THROW(lexical_cast<bool>(1.0001L), bad_lexical_cast);
    BOOST_CHECK_THROW(lexical_cast<bool>(2), bad_lexical_cast);
    BOOST_CHECK_THROW(lexical_cast<bool>(2u), bad_lexical_cast);
    BOOST_CHECK_THROW(lexical_cast<bool>(-1), bad_lexical_cast);
    BOOST_CHECK_THROW(lexical_cast<bool>(-2), bad_lexical_cast);


    BOOST_CHECK_THROW(
        lexical_cast<bool>(std::string("")), bad_lexical_cast);
    BOOST_CHECK_THROW(
        lexical_cast<bool>(std::string("Test")), bad_lexical_cast);

    BOOST_CHECK(lexical_cast<bool>("+1") == true);
    BOOST_CHECK(lexical_cast<bool>("+0") == false);
    BOOST_CHECK(lexical_cast<bool>("-0") == false);
    BOOST_CHECK_THROW(lexical_cast<bool>("--0"), bad_lexical_cast);
    BOOST_CHECK_THROW(lexical_cast<bool>("-+-0"), bad_lexical_cast);

    BOOST_CHECK(lexical_cast<bool>("0") == false);
    BOOST_CHECK(lexical_cast<bool>("1") == true);
    BOOST_CHECK(lexical_cast<bool>("00") == false);
    BOOST_CHECK(lexical_cast<bool>("00000000000") == false);
    BOOST_CHECK(lexical_cast<bool>("000000000001") == true);
    BOOST_CHECK(lexical_cast<bool>("+00") == false );
    BOOST_CHECK(lexical_cast<bool>("-00") == false );
    BOOST_CHECK(lexical_cast<bool>("+00000000001") == true );

    BOOST_CHECK_THROW(lexical_cast<bool>("020"), bad_lexical_cast);
    BOOST_CHECK_THROW(lexical_cast<bool>("00200"), bad_lexical_cast);
    BOOST_CHECK_THROW(lexical_cast<bool>("-00200"), bad_lexical_cast);
    BOOST_CHECK_THROW(lexical_cast<bool>("+00200"), bad_lexical_cast);
    BOOST_CHECK_THROW(lexical_cast<bool>("000000000002"), bad_lexical_cast);
    BOOST_CHECK_THROW(lexical_cast<bool>("-1"), bad_lexical_cast);
    BOOST_CHECK_THROW(lexical_cast<bool>("-0000000001"), bad_lexical_cast);
    BOOST_CHECK_THROW(lexical_cast<bool>("00000000011"), bad_lexical_cast);
    BOOST_CHECK_THROW(lexical_cast<bool>("001001"), bad_lexical_cast);
    BOOST_CHECK_THROW(lexical_cast<bool>("-00000000010"), bad_lexical_cast);
    BOOST_CHECK_THROW(lexical_cast<bool>("-000000000100"), bad_lexical_cast);
}

void test_conversion_to_string()
{
    char buf[] = "hello";
    char* str = buf;
    BOOST_CHECK_EQUAL(str, lexical_cast<std::string>(str));
    BOOST_CHECK_EQUAL("A", lexical_cast<std::string>('A'));
    BOOST_CHECK_EQUAL(" ", lexical_cast<std::string>(' '));
    BOOST_CHECK_EQUAL("123", lexical_cast<std::string>(123));
    BOOST_CHECK_EQUAL("1.23", lexical_cast<std::string>(1.23));
    BOOST_CHECK_EQUAL("1.111111111", lexical_cast<std::string>(1.111111111));
    BOOST_CHECK_EQUAL("1", lexical_cast<std::string>(true));
    BOOST_CHECK_EQUAL("0", lexical_cast<std::string>(false));
    BOOST_CHECK_EQUAL("Test", lexical_cast<std::string>("Test"));
    BOOST_CHECK_EQUAL(" ", lexical_cast<std::string>(" "));
    BOOST_CHECK_EQUAL("", lexical_cast<std::string>(""));
    BOOST_CHECK_EQUAL("Test", lexical_cast<std::string>(std::string("Test")));
    BOOST_CHECK_EQUAL(" ", lexical_cast<std::string>(std::string(" ")));
    BOOST_CHECK_EQUAL("", lexical_cast<std::string>(std::string("")));
}

void test_conversion_from_to_wchar_t_alias()
{
    BOOST_CHECK_EQUAL(123u, lexical_cast<unsigned short>("123"));
    BOOST_CHECK_EQUAL(123u, lexical_cast<unsigned int>("123"));
    BOOST_CHECK_EQUAL(123u, lexical_cast<unsigned long>("123"));
    BOOST_CHECK_EQUAL(std::string("123"),
        lexical_cast<std::string>(static_cast<unsigned short>(123)));
    BOOST_CHECK_EQUAL(std::string("123"), lexical_cast<std::string>(123u));
    BOOST_CHECK_EQUAL(std::string("123"), lexical_cast<std::string>(123ul));
}

void test_conversion_from_wchar_t()
{
#ifndef BOOST_LCAST_NO_WCHAR_T
#if !defined(BOOST_NO_INTRINSIC_WCHAR_T)
    BOOST_CHECK_EQUAL(1, lexical_cast<int>(L'1'));
    BOOST_CHECK_THROW(lexical_cast<int>(L'A'), bad_lexical_cast);
#endif

    BOOST_CHECK_EQUAL(123, lexical_cast<int>(L"123"));
    BOOST_CHECK_THROW(lexical_cast<int>(L""), bad_lexical_cast);
    BOOST_CHECK_THROW(lexical_cast<int>(L"Test"), bad_lexical_cast);

#if !defined(BOOST_NO_INTRINSIC_WCHAR_T)
    BOOST_CHECK_EQUAL(1.0, lexical_cast<double>(L'1'));
    BOOST_CHECK_THROW(lexical_cast<double>(L'A'), bad_lexical_cast);
#endif

    BOOST_CHECK_EQUAL(1.23, lexical_cast<double>(L"1.23"));
    BOOST_CHECK_THROW(lexical_cast<double>(L""), bad_lexical_cast);
    BOOST_CHECK_THROW(lexical_cast<double>(L"Test"), bad_lexical_cast);

#if !defined(BOOST_NO_INTRINSIC_WCHAR_T)
    BOOST_CHECK_EQUAL(true, lexical_cast<bool>(L'1'));
    BOOST_CHECK_EQUAL(false, lexical_cast<bool>(L'0'));
    BOOST_CHECK_THROW(lexical_cast<bool>(L'A'), bad_lexical_cast);
#endif
    BOOST_CHECK_EQUAL(true, lexical_cast<bool>(L"1"));
    BOOST_CHECK_EQUAL(false, lexical_cast<bool>(L"0"));
    BOOST_CHECK_THROW(lexical_cast<bool>(L""), bad_lexical_cast);
    BOOST_CHECK_THROW(lexical_cast<bool>(L"Test"), bad_lexical_cast);
#endif
}

void test_conversion_to_wchar_t()
{
#if !defined(BOOST_LCAST_NO_WCHAR_T) && !defined(BOOST_NO_INTRINSIC_WCHAR_T)
    BOOST_CHECK_EQUAL(L'1', lexical_cast<wchar_t>(1));
    BOOST_CHECK_EQUAL(L'0', lexical_cast<wchar_t>(0));
    BOOST_CHECK_EQUAL(L'1', lexical_cast<wchar_t>('1'));
    BOOST_CHECK_EQUAL(L'0', lexical_cast<wchar_t>('0'));
    BOOST_CHECK_THROW(lexical_cast<wchar_t>(123), bad_lexical_cast);
    BOOST_CHECK_EQUAL(L'1', lexical_cast<wchar_t>(1.0));
    BOOST_CHECK_EQUAL(L'0', lexical_cast<wchar_t>(0.0));
    BOOST_CHECK_EQUAL(L'1', lexical_cast<wchar_t>(true));
    BOOST_CHECK_EQUAL(L'0', lexical_cast<wchar_t>(false));
    BOOST_CHECK_EQUAL(L'A', lexical_cast<wchar_t>(L'A'));
    BOOST_CHECK_EQUAL(L' ', lexical_cast<wchar_t>(L' '));
    BOOST_CHECK_EQUAL(L'A', lexical_cast<wchar_t>(L"A"));
    BOOST_CHECK_EQUAL(L' ', lexical_cast<wchar_t>(L" "));
    BOOST_CHECK_THROW(lexical_cast<wchar_t>(L""), bad_lexical_cast);
    BOOST_CHECK_THROW(lexical_cast<wchar_t>(L"Test"), bad_lexical_cast);
    BOOST_CHECK_EQUAL(L'A', lexical_cast<wchar_t>(std::wstring(L"A")));
    BOOST_CHECK_EQUAL(L' ', lexical_cast<wchar_t>(std::wstring(L" ")));
    BOOST_CHECK_THROW(
        lexical_cast<wchar_t>(std::wstring(L"")), bad_lexical_cast);
    BOOST_CHECK_THROW(
        lexical_cast<wchar_t>(std::wstring(L"Test")), bad_lexical_cast);
#endif
    BOOST_CHECK(true);
}

void test_conversion_from_wstring()
{
#ifndef BOOST_LCAST_NO_WCHAR_T
    BOOST_CHECK_EQUAL(123, lexical_cast<int>(std::wstring(L"123")));
    BOOST_CHECK_THROW(
        lexical_cast<int>(std::wstring(L"")), bad_lexical_cast);
    BOOST_CHECK_THROW(
        lexical_cast<int>(std::wstring(L"Test")), bad_lexical_cast);

    BOOST_CHECK_EQUAL(true, lexical_cast<bool>(std::wstring(L"1")));
    BOOST_CHECK_EQUAL(false, lexical_cast<bool>(std::wstring(L"0")));
    BOOST_CHECK_THROW(
        lexical_cast<bool>(std::wstring(L"")), bad_lexical_cast);
    BOOST_CHECK_THROW(
        lexical_cast<bool>(std::wstring(L"Test")), bad_lexical_cast);
#endif
    BOOST_CHECK(true);
}

void test_conversion_to_wstring()
{
#ifndef BOOST_LCAST_NO_WCHAR_T
    wchar_t buf[] = L"hello";
    wchar_t* str = buf;
    BOOST_CHECK(str == lexical_cast<std::wstring>(str));
    BOOST_CHECK(L"123" == lexical_cast<std::wstring>(123));
    BOOST_CHECK(L"1.23" == lexical_cast<std::wstring>(1.23));
    BOOST_CHECK(L"1" == lexical_cast<std::wstring>(true));
    BOOST_CHECK(L"0" == lexical_cast<std::wstring>(false));
#if !defined(BOOST_NO_INTRINSIC_WCHAR_T)
    BOOST_CHECK(L"A" == lexical_cast<std::wstring>(L'A'));
    BOOST_CHECK(L" " == lexical_cast<std::wstring>(L' '));
    BOOST_CHECK(L"A" == lexical_cast<std::wstring>('A'));
#endif
    BOOST_CHECK(L"Test" == lexical_cast<std::wstring>(L"Test"));
    BOOST_CHECK(L" " == lexical_cast<std::wstring>(L" "));
    BOOST_CHECK(L"" == lexical_cast<std::wstring>(L""));
    BOOST_CHECK(L"Test" == lexical_cast<std::wstring>(std::wstring(L"Test")));
    BOOST_CHECK(L" " == lexical_cast<std::wstring>(std::wstring(L" ")));
    BOOST_CHECK(L"" == lexical_cast<std::wstring>(std::wstring(L"")));
#endif
    BOOST_CHECK(true);
}

void test_bad_lexical_cast()
{
    try
    {
        lexical_cast<int>(std::string("Test"));

        BOOST_CHECK(false); // Exception expected
    }
    catch(const bad_lexical_cast &e)
    {
        BOOST_CHECK(e.source_type() == typeid(std::string));
        BOOST_CHECK(e.target_type() == typeid(int));
    }
}

void test_no_whitespace_stripping()
{
    BOOST_CHECK_THROW(lexical_cast<int>(" 123"), bad_lexical_cast);
    BOOST_CHECK_THROW(lexical_cast<int>("123 "), bad_lexical_cast);
}

void test_volatile_types_conversions()
{
    volatile int i1 = 100000;
    BOOST_CHECK_EQUAL("100000", boost::lexical_cast<std::string>(i1));

    volatile const int i2 = 100000;
    BOOST_CHECK_EQUAL("100000", boost::lexical_cast<std::string>(i2));

    volatile const long int i3 = 1000000;
    BOOST_CHECK_EQUAL("1000000", boost::lexical_cast<std::string>(i3));
}

#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
void test_traits()
{
    typedef std::basic_string<char, my_traits<char> > my_string;

    my_string const s("s");
    BOOST_CHECK(boost::lexical_cast<char>(s) == s[0]);
    BOOST_CHECK(boost::lexical_cast<my_string>(s) == s);
    BOOST_CHECK(boost::lexical_cast<my_string>(-1) == "-1");
}

void test_wtraits()
{
    typedef std::basic_string<wchar_t, my_traits<wchar_t> > my_string;

    my_string const s(L"s");
    BOOST_CHECK(boost::lexical_cast<wchar_t>(s) == s[0]);
    BOOST_CHECK(boost::lexical_cast<my_string>(s) == s);
    //BOOST_CHECK(boost::lexical_cast<my_string>(-1) == L"-1");
    // Commented out because gcc 3.3 doesn't support this:
    // basic_ostream<wchar_t, my_traits<wchar_t> > o; o << -1;
}

void test_allocator()
{
// Following test cause compilation error on MSVC2012:
// (Reason: cannot convert from 'std::_Wrap_alloc<_Alloc>' to 'const my_allocator<CharT>')
// 
// MSVC developer is notified about this issue
#if !defined(_MSC_VER) || (_MSC_VER < 1700)
    typedef std::basic_string< char
                             , std::char_traits<char>
                             , my_allocator<char>
                             > my_string;

    my_string s("s");
    BOOST_CHECK(boost::lexical_cast<char>(s) == s[0]);
    BOOST_CHECK(boost::lexical_cast<std::string>(s) == "s");
    BOOST_CHECK(boost::lexical_cast<my_string>(s) == s);
    BOOST_CHECK(boost::lexical_cast<my_string>(1) == "1");
    BOOST_CHECK(boost::lexical_cast<my_string>("s") == s);
    BOOST_CHECK(boost::lexical_cast<my_string>(std::string("s")) == s);
#endif
}

void test_wallocator()
{
// Following test cause compilation error on MSVC2012:
// (Reason: cannot convert from 'std::_Wrap_alloc<_Alloc>' to 'const my_allocator<CharT>')
// 
// MSVC developer is notified about this issue
#if !defined(_MSC_VER) || (_MSC_VER < 1700)
    typedef std::basic_string< wchar_t
                             , std::char_traits<wchar_t>
                             , my_allocator<wchar_t>
                             > my_string;

    my_string s(L"s");
    BOOST_CHECK(boost::lexical_cast<wchar_t>(s) == s[0]);
    BOOST_CHECK(boost::lexical_cast<std::wstring>(s) == L"s");
    BOOST_CHECK(boost::lexical_cast<my_string>(s) == s);
    BOOST_CHECK(boost::lexical_cast<my_string>(1) == L"1");
    BOOST_CHECK(boost::lexical_cast<my_string>(L"s") == s);
    BOOST_CHECK(boost::lexical_cast<my_string>(std::wstring(L"s")) == s);
#endif
}

#endif


void test_char_types_conversions()
{
    const char c_arr[]            = "Test array of chars";
    const unsigned char uc_arr[]  = "Test array of chars";
    const signed char sc_arr[]    = "Test array of chars";

    BOOST_CHECK(boost::lexical_cast<std::string>(c_arr) == std::string(c_arr));
    BOOST_CHECK(boost::lexical_cast<std::string>(uc_arr) == std::string(c_arr));
    BOOST_CHECK(boost::lexical_cast<std::string>(sc_arr) == std::string(c_arr));

    BOOST_CHECK(boost::lexical_cast<char>(c_arr[0]) == c_arr[0]);
    BOOST_CHECK(boost::lexical_cast<char>(uc_arr[0]) == c_arr[0]);
    BOOST_CHECK(boost::lexical_cast<char>(sc_arr[0]) == c_arr[0]);

    BOOST_CHECK(boost::lexical_cast<unsigned char>(c_arr[0]) == uc_arr[0]);
    BOOST_CHECK(boost::lexical_cast<unsigned char>(uc_arr[0]) == uc_arr[0]);
    BOOST_CHECK(boost::lexical_cast<unsigned char>(sc_arr[0]) == uc_arr[0]);

    BOOST_CHECK(boost::lexical_cast<signed char>(c_arr[0]) == sc_arr[0]);
    BOOST_CHECK(boost::lexical_cast<signed char>(uc_arr[0]) == sc_arr[0]);
    BOOST_CHECK(boost::lexical_cast<signed char>(sc_arr[0]) == sc_arr[0]);

#ifndef BOOST_LCAST_NO_WCHAR_T
    const wchar_t wc_arr[]=L"Test array of chars";

    BOOST_CHECK(boost::lexical_cast<std::wstring>(wc_arr) == std::wstring(wc_arr));
    BOOST_CHECK(boost::lexical_cast<wchar_t>(wc_arr[0]) == wc_arr[0]);

#endif
}



struct foo_operators_test
{
  foo_operators_test() : f(2) {}
  int f;
};

template <typename OStream>
OStream& operator<<(OStream& ostr, const foo_operators_test& foo)
{
  ostr << foo.f;
  return ostr;
}

template <typename IStream>
IStream& operator>>(IStream& istr, foo_operators_test& foo)
{
  istr >> foo.f;
  return istr;
}

void operators_overload_test()
{
    foo_operators_test foo;
    BOOST_CHECK_EQUAL(boost::lexical_cast<std::string>(foo), "2");
    BOOST_CHECK_EQUAL((boost::lexical_cast<foo_operators_test>("2")).f, 2);

    // Must compile
    (void)boost::lexical_cast<foo_operators_test>(foo);
}


#if !defined(BOOST_NO_CXX11_CHAR16_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS)
void test_char16_conversions()
{
    BOOST_CHECK(u"100" == lexical_cast<std::u16string>(u"100"));
    BOOST_CHECK(u"1" == lexical_cast<std::u16string>(u'1'));
}
#endif

#if !defined(BOOST_NO_CXX11_CHAR16_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS)
void test_char32_conversions()
{
    BOOST_CHECK(U"100" == lexical_cast<std::u32string>(U"100"));
    BOOST_CHECK(U"1" == lexical_cast<std::u32string>(U'1'));
}
#endif

void test_getting_pointer_to_function()
{
    // Just checking that &lexical_cast<To, From> is not ambiguous
    typedef char char_arr[4];    
    typedef int(*f1)(const char_arr&);
    f1 p1 = &boost::lexical_cast<int, char_arr>;
    BOOST_CHECK(p1);

    typedef int(*f2)(const std::string&);
    f2 p2 = &boost::lexical_cast<int, std::string>;
    BOOST_CHECK(p2);

    typedef std::string(*f3)(const int&);
    f3 p3 = &boost::lexical_cast<std::string, int>;
    BOOST_CHECK(p3);

    std::vector<int> values;
    std::vector<std::string> ret;
    std::transform(values.begin(), values.end(), ret.begin(), boost::lexical_cast<std::string, int>);
}