exitCondition example

return new InvalidEmail(new UnclosedComment(), $this->lexer->current->value);
            }
        }

        if ($this->lexer->current->isA(EmailLexer::S_CLOSEPARENTHESIS)) {
            return new InvalidEmail(new UnOpenedComment(), $this->lexer->current->value);
        }

        $this->warnings[WarningComment::CODE] = new WarningComment();

        $moreTokens = true;
        while ($this->commentStrategy->exitCondition($this->lexer, $this->openedParenthesis) && $moreTokens) {

            if ($this->lexer->isNextToken(EmailLexer::S_OPENPARENTHESIS)) {
                $this->openedParenthesis++;
            }
            $this->warnEscaping();
            if ($this->lexer->isNextToken(EmailLexer::S_CLOSEPARENTHESIS)) {
                $this->openedParenthesis--;
            }
            $moreTokens = $this->lexer->moveNext();
        }