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<?php |
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namespace uuf6429\ExpressionLanguage\Node; |
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use Symfony\Component\ExpressionLanguage\Node\NameNode; |
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use Symfony\Component\ExpressionLanguage\Node\Node; |
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use Symfony\Component\ExpressionLanguage\Compiler; |
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use uuf6429\ExpressionLanguage\SafeCallable; |
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/** |
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* @author Christian Sciberras <[email protected]> |
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* |
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* @internal |
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*/ |
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class ArrowFuncNode extends Node |
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{ |
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/** |
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* @var SafeCallable |
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*/ |
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private static $noopSafeCallable; |
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/** |
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* @param NameNode[] $parameters |
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* @param Node|null $body |
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*/ |
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public function __construct(array $parameters, Node $body = null) |
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{ |
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parent::__construct( |
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array( |
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'parameters' => $parameters, |
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'body' => $body, |
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) |
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); |
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if (!self::$noopSafeCallable) { |
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self::$noopSafeCallable = new SafeCallable(static function () { |
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}); |
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} |
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} |
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public function compile(Compiler $compiler): void |
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{ |
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$arguments = array(); |
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foreach ($this->nodes['parameters'] as $parameterNode) { |
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$arguments[] = $compiler->subcompile($parameterNode); |
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} |
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$compiler->raw( |
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sprintf( |
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'function (%s) { return %s; }', |
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implode(', ', $arguments), |
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$this->nodes['body'] ? $compiler->subcompile($this->nodes['body']) : 'null' |
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) |
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); |
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} |
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public function evaluate($functions, $values) |
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{ |
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/** @var Node|null $bodyNode */ |
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$bodyNode = $this->nodes['body']; |
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if (!$bodyNode) { |
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return self::$noopSafeCallable; |
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} |
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$paramNames = array(); |
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foreach ($this->nodes['parameters'] as $parameterNode) { |
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/** @var NameNode $parameterNode */ |
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$nodeData = $parameterNode->toArray(); |
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$paramNames[] = $nodeData[0]; |
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} |
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return new SafeCallable( |
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static function () use ($functions, $paramNames, $bodyNode) { |
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$passedValues = array_combine($paramNames, func_get_args()); |
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return $bodyNode->evaluate($functions, $passedValues); |
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} |
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); |
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} |
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public function toArray() |
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{ |
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$array = array(); |
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foreach ($this->nodes['parameters'] as $node) { |
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$array[] = ', '; |
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$array[] = $node; |
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} |
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$array[0] = '('; |
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$array[] = ') -> {'; |
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if ($this->nodes['body']) { |
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$array[] = $this->nodes['body']; |
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} |
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$array[] = '}'; |
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return $array; |
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} |
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} |
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uuf6429 /
expression-language-arrowfunc
