Re: on allowing "int a" definition everywhere

Keith Thompson <Keith.S.Thompson+u@gmail.com> writes:

The original code:
>
    if (FILE* f = fopen("file.txt", "r"))

I think the proposal would be a declaration to precede an expression:

  if (FILE* f = fopen("file.txt", "r"); f)

    {
       /*...*/ fclose(f);
    }
>
doesn't allow for taking some non-trivial action of the fopen() call
fails, but if a declaration in an if condition is visible in the else
clause, you could write something like:
>
    if (FILE* f = fopen("file.txt", "r")) {
       /*...*/
       fclose(f);
    }
    else {
        perror("file.txt");
        exit(EXIT_FAILURE); // or try something else
    }

What's the significance of the declared name being in scope in the else
clause here?

--
Ben.