V8022. A parameter is not used in a function or method.

The analyzer has detected a parameter that has never been used in the body of a function or method.

The example:

func cardHasLock(width int,     // <=
                 height int, 
                 xScale float64, 
                 yScale float64) {
 
    lockWidth := int(math.Round(float64(height) * xScale))
    lockHeight := int(math.Round(float64(height) * yScale))
    ....
}

The height parameter is used both when initializing the lockHeight variable and for lockWidth, which is a typo. To initialize the lockWidth variable correctly, use the width parameter:

lockWidth := int(math.Round(float64(width) * xScale))

The analyzer treats an unused parameter as acceptable and does not issue a warning in the following cases:

• the function or method is used as a value (for example, as a callback), where external code requires the parameter;
• the function or method is exported and must preserve its parameter list for backward compatibility;
• a specific interface strictly defines the parameter list;
• the function or method declares the parameter as a blank identifier;
• the function or method has an empty or trivial body;
• none of the function or method parameters are used;
• the file contains multiple functions or methods with similar unused parameters.