Move Operators to ExpressionParsers, deprecate ExpressionParser

src/ExpressionParser/Infix/FunctionExpressionParser.php

@@ -0,0 +1,84 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Twig\ExpressionParser\Infix;
+
+use Twig\Attribute\FirstClassTwigCallableReady;
+use Twig\Error\SyntaxError;
+use Twig\ExpressionParser\AbstractExpressionParser;
+use Twig\ExpressionParser\InfixAssociativity;
+use Twig\ExpressionParser\InfixExpressionParserInterface;
+use Twig\Node\EmptyNode;
+use Twig\Node\Expression\AbstractExpression;
+use Twig\Node\Expression\MacroReferenceExpression;
+use Twig\Node\Expression\NameExpression;
+use Twig\Parser;
+use Twig\Token;
+
+/**
+ * @internal
+ */
+final class FunctionExpressionParser extends AbstractExpressionParser implements InfixExpressionParserInterface
+{
+    use ArgumentsTrait;
+
+    private $readyNodes = [];
+
+    public function parse(Parser $parser, AbstractExpression $expr, Token $token): AbstractExpression
+    {
+        $line = $token->getLine();
+        if (!$expr instanceof NameExpression) {
+            throw new SyntaxError('Function name must be an identifier.', $line, $parser->getStream()->getSourceContext());
+        }
+
+        $name = $expr->getAttribute('name');
+
+        if (null !== $alias = $parser->getImportedSymbol('function', $name)) {
+            return new MacroReferenceExpression($alias['node']->getNode('var'), $alias['name'], $this->parseCallableArguments($parser, $line, false), $line);
+        }
+
+        $args = $this->parseNamedArguments($parser, false);
+
+        $function = $parser->getFunction($name, $line);
+
+        if ($function->getParserCallable()) {
+            $fakeNode = new EmptyNode($line);
+            $fakeNode->setSourceContext($parser->getStream()->getSourceContext());
+
+            return ($function->getParserCallable())($parser, $fakeNode, $args, $line);
+        }
+
+        if (!isset($this->readyNodes[$class = $function->getNodeClass()])) {
+            $this->readyNodes[$class] = (bool) (new \ReflectionClass($class))->getConstructor()->getAttributes(FirstClassTwigCallableReady::class);
+        }
+
+        if (!$ready = $this->readyNodes[$class]) {
+            trigger_deprecation('twig/twig', '3.12', 'Twig node "%s" is not marked as ready for passing a "TwigFunction" in the constructor instead of its name; please update your code and then add #[FirstClassTwigCallableReady] attribute to the constructor.', $class);
+        }
+
+        return new $class($ready ? $function : $function->getName(), $args, $line);
+    }
+
+    public function getName(): string
+    {
+        return '(';
+    }
+
+    public function getPrecedence(): int
+    {
+        return 300;
+    }
+
+    public function getAssociativity(): InfixAssociativity
+    {
+        return InfixAssociativity::Left;
+    }
+}