Synopsis

A function parameter is declared but not used.

Enabled by default

No

Severity/Certainty

Low/Medium

Full description

A function parameter is declared but not used. This might be intentional, and is not unsafe as such. For example, the function might need to follow a specific calling convention, or might be a virtual C++ function that does not need as much information from its arguments as other functions do. Make sure that it is not an error. This check is identical to MISRAC++2008-0-1-11, MISRAC2012-Rule-2.7, MISRAC++2023-0.2.2_a.

Coding standards

Code examples

The following code example fails the check and will give a warning:

int example(int x) {
  /* `x' is not used */
  return 20;
}

The following code example passes the check and will not give a warning about this issue:

int example(int x) {
  return x + 20;
}