Unnecessary unary minus

Reports unnecessary unary minuses. Such expressions might be hard to understand and might contain errors.

For example:

The following quick fixes are suggested here:

• Remove - operators before the i variable:

  void unaryMinus(int i) { int x = i; }

• Replace - operators with the prefix decrement operator:

  void unaryMinus(int i) { int x = --i; }

Another example:

After the quick-fix is applied: