<?php declare(strict_types=1);
/*
 * This file is part of PHPUnit.
 *
 * (c) Sebastian Bergmann <sebastian@phpunit.de>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace PHPUnit\Framework\Constraint;

use function array_map;
use function array_values;
use function count;

/**
 * @no-named-arguments Parameter names are not covered by the backward compatibility promise for PHPUnit
 */
abstract class BinaryOperator extends Operator
{
    /**
     * @var Constraint[]
     */
    private $constraints = [];

    public static function fromConstraints(Constraint ...$constraints): self
    {
        $constraint = new static;

        $constraint->constraints = $constraints;

        return $constraint;
    }

    /**
     * @param mixed[] $constraints
     */
    public function setConstraints(array $constraints): void
    {
        $this->constraints = array_map(function ($constraint): Constraint
        {
            return $this->checkConstraint($constraint);
        }, array_values($constraints));
    }

    /**
     * Returns the number of operands (constraints).
     */
    final public function arity(): int
    {
        return count($this->constraints);
    }

    /**
     * Returns a string representation of the constraint.
     */
    public function toString(): string
    {
        $reduced = $this->reduce();

        if ($reduced !== $this) {
            return $reduced->toString();
        }

        $text = '';

        foreach ($this->constraints as $key => $constraint) {
            $constraint = $constraint->reduce();

            $text .= $this->constraintToString($constraint, $key);
        }

        return $text;
    }

    /**
     * Counts the number of constraint elements.
     */
    public function count(): int
    {
        $count = 0;

        foreach ($this->constraints as $constraint) {
            $count += count($constraint);
        }

        return $count;
    }

    /**
     * Returns the nested constraints.
     */
    final protected function constraints(): array
    {
        return $this->constraints;
    }

    /**
     * Returns true if the $constraint needs to be wrapped with braces.
     */
    final protected function constraintNeedsParentheses(Constraint $constraint): bool
    {
        return $this->arity() > 1 && parent::constraintNeedsParentheses($constraint);
    }

    /**
     * Reduces the sub-expression starting at $this by skipping degenerate
     * sub-expression and returns first descendant constraint that starts
     * a non-reducible sub-expression.
     *
     * See Constraint::reduce() for more.
     */
    protected function reduce(): Constraint
    {
        if ($this->arity() === 1 && $this->constraints[0] instanceof Operator) {
            return $this->constraints[0]->reduce();
        }

        return parent::reduce();
    }

    /**
     * Returns string representation of given operand in context of this operator.
     *
     * @param Constraint $constraint operand constraint
     * @param int        $position   position of $constraint in this expression
     */
    private function constraintToString(Constraint $constraint, int $position): string
    {
        $prefix = '';

        if ($position > 0) {
            $prefix = (' ' . $this->operator() . ' ');
        }

        if ($this->constraintNeedsParentheses($constraint)) {
            return $prefix . '( ' . $constraint->toString() . ' )';
        }

        $string = $constraint->toStringInContext($this, $position);

        if ($string === '') {
            $string = $constraint->toString();
        }

        return $prefix . $string;
    }
}

• [F] BinaryOperator.php
  Delete
• [F] LogicalAnd.php
  Delete
• [F] LogicalNot.php
  Delete
• [F] LogicalOr.php
  Delete
• [F] LogicalXor.php
  Delete
• [F] Operator.php
  Delete
• [F] UnaryOperator.php
  Delete

Service Section

Our Services: Streamlining Your Payment Experience with Excellence

Discover how our services are designed to enhance your NFC Pay experience with convenience, security, and innovative solutions. From managing transactions to secure payments, we are dedicated to providing seamless support every step of the way.

Secure Card Storage

Easily save your credit and debit card details within our app for quick and secure transactions. This feature ensures that your payment information is protected with advanced encryption and can be used for future purchases with just a tap.

Effortless Money Transfers

Transfer funds quickly and securely between users with our streamlined money transfer service. Simply select the recipient, enter the amount, and authorize the transaction for instant, hassle-free transfers.

Merchant Account Setup

Activate your merchant account effortlessly to start receiving payments. Our intuitive setup process ensures that you can begin accepting transactions smoothly, helping your business thrive with minimal setup time.

Real-Time Transaction Tracking

Keep track of all your transactions in real time through our app. Monitor payment statuses, view transaction history, and manage your account efficiently, ensuring complete control over your financial activities.

Customer Support

Our dedicated support team is available to assist you with any queries or issues. Whether you need help with setting up your account or resolving transaction-related questions, we’re here to provide prompt and reliable assistance.