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<?php |
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namespace PeacefulBit\Slate\Core; |
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use PeacefulBit\Slate\Exceptions\EvaluatorException; |
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use PeacefulBit\Slate\Parser\Parser; |
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use PeacefulBit\Slate\Parser\Tokenizer; |
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class Evaluator |
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{ |
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private static $moduleExports = [ |
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'\PeacefulBit\Slate\Core\Modules\Logic\export', |
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'\PeacefulBit\Slate\Core\Modules\Math\export', |
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'\PeacefulBit\Slate\Core\Modules\Relation\export', |
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'\PeacefulBit\Slate\Core\Modules\Stdio\export', |
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'\PeacefulBit\Slate\Core\Modules\Strings\export', |
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]; |
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/** |
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* @var array |
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*/ |
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private $modules; |
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/** |
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* @param array $userModules |
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*/ |
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public function __construct(array $userModules = []) |
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{ |
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$this->loadModules($userModules); |
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} |
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private function loadModules(array $modules) |
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{ |
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$this->modules = array_merge_recursive($modules, ...array_map(function ($export) { |
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return $export(); |
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}, self::$moduleExports)); |
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} |
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/** |
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* @param string $code |
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* @return mixed |
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*/ |
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public function evaluate(string $code) |
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{ |
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$tokenizer = new Tokenizer(); |
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$tokens = $tokenizer->tokenize($code); |
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$parser = new Parser(); |
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$ast = $parser->parse($tokens); |
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$frame = new Frame($this, $this->modules); |
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// Import functions from @ module |
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$frame->importModule('@'); |
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return $frame->valueOf($ast); |
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} |
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/** |
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* @param string $code |
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* @return mixed |
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*/ |
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public function __invoke(string $code) |
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{ |
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return $this->evaluate($code); |
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} |
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/** |
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* @param $name |
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* @return mixed |
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* @throws EvaluatorException |
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*/ |
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public function getModule($name) |
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{ |
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if (!array_key_exists($name, $this->modules)) { |
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throw new EvaluatorException("Module \"$name\" not found"); |
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} |
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return $this->modules[$name]; |
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} |
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} |
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peacefulbit /
packet-lite
