How to use the boost lexical_cast library for just for checking input
- by Inverse
I use the boost lexical_cast library for parsing text data into numeric values quite often. In several situations however, I only need to check if values are numeric; I don't actually need or use the conversion.
So, I was thinking about writing a simple function to test if a string is a double:
template<typename T>
bool is_double(const T& s)
{
try
{
boost::lexical_cast<double>(s);
return true;
}
catch (...)
{
return false;
}
}
My question is, are there any optimizing compilers that would drop out the lexical_cast here since I never actually use the value?
Is there a better technique to use the lexical_cast library to perform input checking?
