lexical_cast/test/no_locale_test.cpp

//  Unit test for boost::lexical_cast.
//
//  See http://www.boost.org for most recent version, including documentation.
//
//  Copyright Antony Polukhin, 2012-2025.
//
//  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/lexical_cast.hpp>

#include <boost/core/lightweight_test.hpp>
#include <boost/range/iterator_range.hpp>

#include "escape_struct.hpp"

#include <vector>

using namespace boost;

// Testing compilation and some basic usage with BOOST_NO_STD_LOCALE
// Tests are mainly copyied from empty_input_test.cpp (something
// new added to test_empty_3)

#ifndef BOOST_NO_STD_LOCALE
#error "This test must be compiled with -DBOOST_NO_STD_LOCALE"
#endif


template <class T>
void do_test_on_empty_input(T& v)
{
    BOOST_TEST_THROWS(lexical_cast<int>(v), bad_lexical_cast);
    BOOST_TEST_THROWS(lexical_cast<float>(v), bad_lexical_cast);
    BOOST_TEST_THROWS(lexical_cast<double>(v), bad_lexical_cast);
#ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
    BOOST_TEST_THROWS(lexical_cast<long double>(v), bad_lexical_cast);
#endif
    BOOST_TEST_THROWS(lexical_cast<unsigned int>(v), bad_lexical_cast);
    BOOST_TEST_THROWS(lexical_cast<unsigned short>(v), bad_lexical_cast);
#if defined(BOOST_HAS_LONG_LONG)
    BOOST_TEST_THROWS(lexical_cast<boost::ulong_long_type>(v), bad_lexical_cast);
    BOOST_TEST_THROWS(lexical_cast<boost::long_long_type>(v), bad_lexical_cast);
#elif defined(BOOST_HAS_MS_INT64)
    BOOST_TEST_THROWS(lexical_cast<unsigned __int64>(v), bad_lexical_cast);
    BOOST_TEST_THROWS(lexical_cast<__int64>(v), bad_lexical_cast);
#endif
}

void test_empty_1()
{
    boost::iterator_range<char*> v;
    do_test_on_empty_input(v);
    BOOST_TEST_EQ(lexical_cast<std::string>(v), std::string());
    BOOST_TEST_THROWS(lexical_cast<char>(v), bad_lexical_cast);
    BOOST_TEST_THROWS(lexical_cast<unsigned char>(v), bad_lexical_cast);
    BOOST_TEST_THROWS(lexical_cast<signed char>(v), bad_lexical_cast);

    boost::iterator_range<const char*> cv;
    do_test_on_empty_input(cv);
    BOOST_TEST_EQ(lexical_cast<std::string>(cv), std::string());
    BOOST_TEST_THROWS(lexical_cast<char>(cv), bad_lexical_cast);
    BOOST_TEST_THROWS(lexical_cast<unsigned char>(cv), bad_lexical_cast);
    BOOST_TEST_THROWS(lexical_cast<signed char>(cv), bad_lexical_cast);

    const boost::iterator_range<const char*> ccv;
    do_test_on_empty_input(ccv);
    BOOST_TEST_EQ(lexical_cast<std::string>(ccv), std::string());
    BOOST_TEST_THROWS(lexical_cast<char>(ccv), bad_lexical_cast);
    BOOST_TEST_THROWS(lexical_cast<unsigned char>(ccv), bad_lexical_cast);
    BOOST_TEST_THROWS(lexical_cast<signed char>(ccv), bad_lexical_cast);
}

void test_empty_2()
{
    std::string v;
    do_test_on_empty_input(v);
    BOOST_TEST_THROWS(lexical_cast<char>(v), bad_lexical_cast);
    BOOST_TEST_THROWS(lexical_cast<unsigned char>(v), bad_lexical_cast);
    BOOST_TEST_THROWS(lexical_cast<signed char>(v), bad_lexical_cast);
}

void test_empty_3()
{
    EscapeStruct v("");
    do_test_on_empty_input(v);

    BOOST_TEST_THROWS(lexical_cast<char>(v), bad_lexical_cast);
    BOOST_TEST_THROWS(lexical_cast<unsigned char>(v), bad_lexical_cast);
    BOOST_TEST_THROWS(lexical_cast<signed char>(v), bad_lexical_cast);

    v = lexical_cast<EscapeStruct>(100);
    BOOST_TEST_EQ(lexical_cast<int>(v), 100);
    BOOST_TEST_EQ(lexical_cast<unsigned int>(v), 100u);

    v = lexical_cast<EscapeStruct>(0.0);
    BOOST_TEST_EQ(lexical_cast<double>(v), 0.0);
}

namespace std {
inline std::ostream & operator<<(std::ostream & out, const std::vector<long> & v)
{
    std::ostream_iterator<long> it(out);
    std::copy(v.begin(), v.end(), it);
    BOOST_TEST(out);
    return out;
}
}

void test_empty_4()
{
    std::vector<long> v;
    do_test_on_empty_input(v);
    BOOST_TEST_THROWS(lexical_cast<char>(v), bad_lexical_cast);
    BOOST_TEST_THROWS(lexical_cast<unsigned char>(v), bad_lexical_cast);
    BOOST_TEST_THROWS(lexical_cast<signed char>(v), bad_lexical_cast);
}


struct my_string {
    friend std::ostream &operator<<(std::ostream& sout, my_string const&/* st*/) {
            return sout << "";
    }
};

void test_empty_5()
{
    my_string st;
    BOOST_TEST_EQ(boost::lexical_cast<std::string>(st), std::string());;
}

int main()
{
    test_empty_1();
    test_empty_2();
    test_empty_3();
    test_empty_4();
    test_empty_5();

    return boost::report_errors();
}