The following code example is taken from the book
Object-Oriented Programming in C++
by Nicolai M. Josuttis, Wiley, 2002
© Copyright Nicolai M. Josuttis 2002
#include <sstream>
template<typename TargetType, typename SourceType>
TargetType lexical_cast(SourceType in)
{
std::stringstream interpreter;
TargetType out;
if(!(interpreter << in) || !(interpreter >> out) ||
!(interpreter >> std::ws).eof()) {
throw "bad lexical cast";
}
return out;
}