Description Mathias De Maré 2011-11-13 14:57:00 EST

Build Identifier: 

Combined declaration and initialisation in a switch statement is not allowed if the scope is not changed.

This is because each of the 'case' entries in the switch represents a label. This means you can jump over the statements in a case, which is not allowed for declaration + initialization (see C++ 2003, 6.7-3).

The solution is to add a new scope in the case.

Error case:
switch(a) {
case 0:
    int j = 2; <-- error
default:
        break;
}

Working case:
switch(a) {
case 0:
    {
        int j = 2;
    }
default:
        break;
}

Reproducible: Always