Is it possible to use exceptions with file opening as an alternative to using .is_open()
?
For example:
ifstream input;
try{
input.open("somefile.txt");
}catch(someException){
//Catch exception here
}
If so, what type is someException
?
http://en.cppreference.com/w/cpp/io/basic_ios/exceptions
Also read this answer 11085151 which references this article
// ios::exceptions
#include <iostream>
#include <fstream>
using namespace std;
void do_something_with(char ch) {} // Process the character
int main () {
ifstream file;
file.exceptions ( ifstream::badbit ); // No need to check failbit
try {
file.open ("test.txt");
char ch;
while (file.get(ch)) do_something_with(ch);
// for line-oriented input use file.getline(s)
}
catch (const ifstream::failure& e) {
cout << "Exception opening/reading file";
}
file.close();
return 0;
}
Sample code running on Wandbox
EDIT: catch exceptions by const reference 2145147
EDIT: removed failbit from the exception set. Added URLs to better answers.