This rule applies whenever an if statement is followed by one or more else if statements; the final else if
should be followed by an else statement.
The requirement for a final else statement is defensive programming.
The else statement should either take appropriate action or contain a suitable comment as to why no action is taken. This is
consistent with the requirement to have a final default clause in a switch statement.
Noncompliant code example
if x == 0 {
do_something();
} else if x == 1 {
do_something_else();
}
Compliant solution
if x == 0 {
do_something();
} else if x == 1 {
do_something_else();
} else {
panic!("Unexpected value for x");
}
