Re: [Boost-users] lexical_cast and infinity

Patrick Mézard wrote:

The last line of the following program throws a bad_lexical_cast exception. The code is compiled with VC7.1.

//********************************************************** #include <limits> #include <iostream> #include

int main(int argc, char* argv[]) { double d = std::numeric_limits<double>::infinity(); std::string s = boost::lexical_caststd::string(d); std::cout<

//Throws bad_lexical_cast boost::lexical_cast<double>(s); } //**********************************************************

The output is:

"1.#INF, 1.#INF"

Am I doing something wrong ?

Textual representations of infinities and NaNs are not specified in the C++ standard or the C90 standard which it references (though they are in C99). So there is unfortunately no guarantee that you can successfully convert them to and from strings. Ben.