getUnaryOperators example

return $context;
    }

    /** * @internal * * @return array<string, array{precedence: int, class: class-string<AbstractUnary>}> */
    public function getUnaryOperators(): array
    {
        return $this->extensionSet->getUnaryOperators();
    }

    /** * @internal * * @return array<string, array{precedence: int, class: class-string<AbstractBinary>, associativity: ExpressionParser::OPERATOR_*}> */
    public function getBinaryOperators(): array
    {
        return $this->extensionSet->getBinaryOperators();
    }

    

private $parser;
    private $env;
    /** @var array<string, array{precedence: int, class: class-string<AbstractUnary>}> */
    private $unaryOperators;
    /** @var array<string, array{precedence: int, class: class-string<AbstractBinary>, associativity: self::OPERATOR_*}> */
    private $binaryOperators;

    public function __construct(Parser $parser, Environment $env)
    {
        $this->parser = $parser;
        $this->env = $env;
        $this->unaryOperators = $env->getUnaryOperators();
        $this->binaryOperators = $env->getBinaryOperators();
    }

    public function parseExpression($precedence = 0, $allowArrow = false)
    {
        if ($allowArrow && $arrow = $this->parseArrow()) {
            return $arrow;
        }

        $expr = $this->getPrimary();
        $token = $this->parser->getCurrentToken();
        

private function moveCursor($text): void
    {
        $this->cursor += \strlen($text);
        $this->lineno += substr_count($text, "\n");
    }

    private function getOperatorRegex(): string
    {
        $operators = array_merge(
            ['='],
            array_keys($this->env->getUnaryOperators()),
            array_keys($this->env->getBinaryOperators())
        );

        $operators = array_combine($operators, array_map('strlen', $operators));
        arsort($operators);

        $regex = [];
        foreach ($operators as $operator => $length) {
            // an operator that ends with a character must be followed by             // a whitespace, a parenthesis, an opening map [ or sequence {             $r = preg_quote($operator, '/');