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<?php
namespace CondParse;
use CondParse\ParseStrategy\ClosingBracket;
use CondParse\ParseStrategy\DefaultStrategy;
use CondParse\ParseStrategy\Operand;
use CondParse\ParseStrategy\ParseStrategyInterface;
use CondParse\ParseStrategy\ToOperatorStack;
use CondParse\ParseStrategy\WhiteSpace;
class TokenParser
{
const STRATEGIES = [
WhiteSpace::class,
Operand::class,
ToOperatorStack::class,
ClosingBracket::class
];
const FALLBACK_STRATEGY = DefaultStrategy::class;
/** @var ParseStrategyInterface[] */
private $strategies;
/** @var ParseStrategyInterface */
private $fallbackStrategy;
public function __construct()
$this->strategies = array_map(function ($class) {
return new $class();
}, self::STRATEGIES);
$fallbackClass = self::FALLBACK_STRATEGY;
$this->fallbackStrategy = new $fallbackClass();
}
/**
* @param TokenParserParameter $parameter
*/
public function parseToken(TokenParserParameter $parameter)
foreach ($this->strategies as $strategy) {
if (! $strategy->shouldExecuteFor($parameter)) {
continue;
$strategy->executeFor($parameter);
return;
$this->fallbackStrategy->executeFor($parameter);
zwilias /
condparse
