PHPSA\Compiler\Expression\AbstractExpressionCompiler

Complexity

Total Complexity

4

Size/Duplication

Total Lines	45
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	0

Test Coverage

Coverage

100%

Importance

Changes

0

4 Methods

Rating	Name	Duplication	Size	Complexity
A	pass()	0	5	1
A	getName()	0	4	1
	compile()	0	1	?
A	assertExpression()	0	6	2

<?php
/**
 * @author Patsura Dmitry https://github.com/ovr <talk@dmtry.me>
 */

namespace PHPSA\Compiler\Expression;

use InvalidArgumentException;
use PHPSA\CompiledExpression;
use PHPSA\Context;
use PHPSA\Compiler\ExpressionCompilerInterface;

abstract class AbstractExpressionCompiler implements ExpressionCompilerInterface
{
    /**
     * @abstract
     * @var string
     */
    protected $name = 'unknown';

    /**
     * @param $expression
     * @throws InvalidArgumentException when param does not match $this->name
     */
    protected function assertExpression($expression)
    {
        if (!$expression instanceof $this->name) {
            throw new InvalidArgumentException('Passed $expression must be instance of ' . $this->name);
        }
    }

    /**
     * @param  $expr
     * @param Context $context
     * @return CompiledExpression
     */
    public function pass($expr, Context $context)
    {
        $this->assertExpression($expr);
        return $this->compile($expr, $context);
    }

    /**
     * @return string
     */
    public function getName()
    {
        return $this->name;
    }

    /**
     * @param $expr
     * @param Context $context
     * @return mixed
     */
    abstract protected function compile($expr, Context $context);
}