}

// expression parses:
//
//	<expression> ::= <(unary) operator-name> <expression>
//	             ::= <(binary) operator-name> <expression> <expression>
//	             ::= <(trinary) operator-name> <expression> <expression> <expression>
//	             ::= pp_ <expression>
//	             ::= mm_ <expression>
//	             ::= cl <expression>+ E
//	             ::= cl <expression>+ E

	} else if reqs.Goroutine == event.MustNotHave && ctx.G != NoGoroutine {
		return fmt.Errorf("expected no goroutine but had one")
	}
	return nil
}

// gcState is a trinary variable for the current state of the GC.
//
// The third state besides "enabled" and "disabled" is "undetermined."
type gcState uint8

const (
	gcUndetermined gcState = iota
	gcNotRunning