Why is this an issue?
This is a constraint error, but preprocessors have been known to ignore this problem. Each argument in a function-like macro must consist of at
least one preprocessing token otherwise the behaviour is undefined.
- MISRA C:2004, 19.8 - A function-like macro shall not be invoked without all of its arguments.
- MITRE, CWE-628 - Function Call with Incorrectly Specified Arguments