VERILOG2103: Constant functions should not invoke tasks

Summary

Reliability	Security	Maintainability	Code attribute	Effort to fix	Tags

HIGH	-	-	Intentionality \| Logical	5min	synthesis, vscode, simulation, linter

localparam string foo = func();
function string func;
  automatic string s;
  $swrite(s, "asdf %d", 3); // Noncompliant
  return s;
endfunction

A constant function contains a system task invocation which will be skipped during constant evaluation. This could yield unintuitive results.

No parameters.