<?php

namespace MathPHP\LinearAlgebra;

use MathPHP\Exception;

/**
 * Square matrix
 * Number of rows = number of columns
 * 1x1, 2x2, 3x3, etc.
 */
class NumericSquareMatrix extends NumericMatrix
{
    /**
     * Constructor
     *
     * @param array<array<int|float>> $A
     *
     * @throws Exception\MathException
     */
    public function __construct(array $A)
    {
        parent::__construct($A);

        if ($this->m !== $this->n) {
            throw new Exception\MatrixException('Not a square matrix; row count and column count differ');
        }
    }

    /**
     * Square matrix must be square
     *
     * @return bool
     */
    public function isSquare(): bool
    {
        return true;
    }
}