Inline directives

The gen flags above are the run-wide switches; comments are the local one. A site a directive suppresses is reported exactly like a filtered one: still listed in mutants.json, with "ignored" naming the directive and "reason" keeping its text, and run reports it IGNORED without building or executing it.

//mutrim:disable [op,...] [reason]            // until //mutrim:enable
//mutrim:disable-next-line [op,...] [reason]  // the line below
//mutrim:disable-func [op,...] [reason]       // in a function's doc comment
//mutrim:enable                               // closes every open disable

func Retry(attempts int) error {
  //mutrim:disable-next-line relational,constant the bound is arbitrary
  for i := 0; i < 3; i++ {
  }
  return nil
}

The operator list is optional and defaults to every operator, which all spells explicitly. A first word that does not name operators starts the reason instead, so a reason never needs quoting. A //mutrim:disable that nothing closes runs to the end of the file. A directive wins over the gen filters, which are only consulted for a site no directive covers.