ParameterName
Detects `/* name= */`-style comments on actual parameters where the name doesn't match the formal parameter

Category
Severity
WARNING
Maturity

The problem

In certain contexts literal arguments - such as 0, "", true and false, or null - can make it difficult for readers to know what a method will do. Defining methods that take boolean parameters or otherwise expect users to pass in ambiguous literals is generally discouraged. However, when you must call such a method you’re encouraged to use the parameter name as an inline comment at the call site, so that readers don’t need to look at the method declaration to understand the parameter’s purpose.

Error Prone recognizes such comments that use the following formatting, and emits an error if the comment doesn’t match the name of the corresponding formal parameter:

booleanMethod(/* enableFoo= */ true);

If the comment deliberately does not match the formal parameter name, using a regular block comment without the = is recommended: /* enableFoo */.

Suppression

Suppress false positives by adding the suppression annotation @SuppressWarnings("ParameterName") to the enclosing element.