How to raise an error, if the parsed number of a C++ stdlib stream is immediatly followed by a non whitespace character?
- by Micha Wiedenmann
In the following example, I didn't expect, that 1.2345foo would be parsed. Since I am reading data files, it is probably better to raise an error and notify the user.
Is peek() the correct thing to do here?
#include <iostream>
#include <sstream>
int main()
{
std::stringstream in("1.2345foo");
double x;
in >> x;
if (in) {
std::cout << "good\n";
}
else {
std::cout << "bad\n";
}
}
Output
good
