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C-/C++-Quelltext

   // Casts für Zahl<->String und co. 

template<typename A, typename T> inline const A lexical_cast (const T& source)    
{ 
    std::basic_stringstream<char> s; 
    A destination; 

    if (!(s << source) || !(s >> destination) || !(s >> std::ws).eof()) 
        throw "bad lexical cast"; 

    return (destination); 
} 

C-/C++-Quelltext

std::string foo = boost::lexical_cast< std::string, float >( 3.1415f );

C-/C++-Quelltext

namespace
{
    template< typename T >
    struct char_type
    {
        typedef char type;
    };

    template<>
    struct char_type< wchar_t >
    {
        typedef wchar_t type;
    };

    template<>
    struct char_type< wchar_t* >
    {
        typedef wchar_t type;
    };

    template<>
    struct char_type< const wchar_t* >
    {
        typedef wchar_t type;
    };

    template<>
    struct char_type< std::wstring >
    {
        typedef wchar_t type;
    };
}

template< typename Dest, typename Source >
Dest lexical_cast( const Source& src )
{
    std::basic_stringstream< char_type< Dest >::type > cnv;
    Dest result;

    if ( !( cnv << src && cnv >> result && ( cnv >> std::ws ).eof() ) )
    {
        throw std::bad_cast( "lexical_cast failed" );
    }

    return result;
}