Remorhaz\UniLex\Parser\LL1\Lookup\Table

Complexity

Total Complexity

9

Size/Duplication

Total Lines	50
Duplicated Lines	0 %

Importance

Changes

0

6 Methods

Rating	Name	Duplication	Size	Complexity
A	importMap()	0	3	1
A	addProduction()	0	6	2
A	getProductionIndex()	0	6	2
A	exportMap()	0	3	1
A	getExpectedTokenList()	0	3	2
A	hasProduction()	0	3	1

<?php

declare(strict_types=1);

namespace Remorhaz\UniLex\Parser\LL1\Lookup;

use Remorhaz\UniLex\Exception;

class Table implements TableInterface
{
    private $map = [];

    /**
     * @param int $symbolId
     * @param int $tokenId
     * @param int $productionIndex
     * @throws Exception
     */
    public function addProduction(int $symbolId, int $tokenId, int $productionIndex): void
    {
        if ($this->hasProduction($symbolId, $tokenId)) {
            throw new Exception("Production for [{$symbolId}:{$tokenId}] is already defined");
        }
        $this->map[$symbolId][$tokenId] = $productionIndex;
    }

    /**
     * @param int $symbolId
     * @param int $tokenId
     * @return int
     * @throws Exception
     */
    public function getProductionIndex(int $symbolId, int $tokenId): int
    {
        if (!$this->hasProduction($symbolId, $tokenId)) {
            throw new Exception("Production for [{$symbolId}:{$tokenId}] is not defined");
        }
        return $this->map[$symbolId][$tokenId];
    }

    public function getExpectedTokenList(int $symbolId): array
    {
        return isset($this->map[$symbolId]) ? array_keys($this->map[$symbolId]) : [];
    }

    public function hasProduction(int $symbolId, int $tokenId): bool
    {
        return isset($this->map[$symbolId][$tokenId]);
    }

    public function exportMap(): array
    {
        return $this->map;
    }

    public function importMap(array $map): void
    {
        $this->map = $map;
    }
}