Symfony Profiler

<?php
/*
* This file is part of Twig.
*
* (c) Fabien Potencier
* (c) Armin Ronacher
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Twig;
use Twig\Attribute\FirstClassTwigCallableReady;
use Twig\Error\SyntaxError;
use Twig\Node\Expression\AbstractExpression;
use Twig\Node\Expression\ArrayExpression;
use Twig\Node\Expression\ArrowFunctionExpression;
use Twig\Node\Expression\AssignNameExpression;
use Twig\Node\Expression\Binary\AbstractBinary;
use Twig\Node\Expression\Binary\ConcatBinary;
use Twig\Node\Expression\ConditionalExpression;
use Twig\Node\Expression\ConstantExpression;
use Twig\Node\Expression\GetAttrExpression;
use Twig\Node\Expression\MethodCallExpression;
use Twig\Node\Expression\NameExpression;
use Twig\Node\Expression\TestExpression;
use Twig\Node\Expression\Unary\AbstractUnary;
use Twig\Node\Expression\Unary\NegUnary;
use Twig\Node\Expression\Unary\NotUnary;
use Twig\Node\Expression\Unary\PosUnary;
use Twig\Node\Node;
/**
* Parses expressions.
*
* This parser implements a "Precedence climbing" algorithm.
*
* @see https://www.engr.mun.ca/~theo/Misc/exp_parsing.htm
* @see https://en.wikipedia.org/wiki/Operator-precedence_parser
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class ExpressionParser
{
public const OPERATOR_LEFT = 1;
public const OPERATOR_RIGHT = 2;
/** @var array<string, array{precedence: int, class: class-string<AbstractUnary>}> */
private $unaryOperators;
/** @var array<string, array{precedence: int, class: class-string<AbstractBinary>, associativity: self::OPERATOR_*}> */
private $binaryOperators;
private $readyNodes = [];
public function __construct(
private Parser $parser,
private Environment $env,
) {
$this->unaryOperators = $env->getUnaryOperators();
$this->binaryOperators = $env->getBinaryOperators();
}
public function parseExpression($precedence = 0, $allowArrow = false)
{
if ($allowArrow && $arrow = $this->parseArrow()) {
return $arrow;
}
$expr = $this->getPrimary();
$token = $this->parser->getCurrentToken();
while ($this->isBinary($token) && $this->binaryOperators[$token->getValue()]['precedence'] >= $precedence) {
$op = $this->binaryOperators[$token->getValue()];
$this->parser->getStream()->next();
if ('is not' === $token->getValue()) {
$expr = $this->parseNotTestExpression($expr);
} elseif ('is' === $token->getValue()) {
$expr = $this->parseTestExpression($expr);
} elseif (isset($op['callable'])) {
$expr = $op['callable']($this->parser, $expr);
} else {
$expr1 = $this->parseExpression(self::OPERATOR_LEFT === $op['associativity'] ? $op['precedence'] + 1 : $op['precedence'], true);
$class = $op['class'];
$expr = new $class($expr, $expr1, $token->getLine());
}
$token = $this->parser->getCurrentToken();
}
if (0 === $precedence) {
return $this->parseConditionalExpression($expr);
}
return $expr;
}
/**
* @return ArrowFunctionExpression|null
*/
private function parseArrow()
{
$stream = $this->parser->getStream();
// short array syntax (one argument, no parentheses)?
if ($stream->look(1)->test(Token::ARROW_TYPE)) {
$line = $stream->getCurrent()->getLine();
$token = $stream->expect(Token::NAME_TYPE);
$names = [new AssignNameExpression($token->getValue(), $token->getLine())];
$stream->expect(Token::ARROW_TYPE);
return new ArrowFunctionExpression($this->parseExpression(0), new Node($names), $line);
}
// first, determine if we are parsing an arrow function by finding => (long form)
$i = 0;
if (!$stream->look($i)->test(Token::PUNCTUATION_TYPE, '(')) {
return null;
}
++$i;
while (true) {
// variable name
++$i;
if (!$stream->look($i)->test(Token::PUNCTUATION_TYPE, ',')) {
break;
}
++$i;
}
if (!$stream->look($i)->test(Token::PUNCTUATION_TYPE, ')')) {
return null;
}
++$i;
if (!$stream->look($i)->test(Token::ARROW_TYPE)) {
return null;
}
// yes, let's parse it properly
$token = $stream->expect(Token::PUNCTUATION_TYPE, '(');
$line = $token->getLine();
$names = [];
while (true) {
$token = $stream->expect(Token::NAME_TYPE);
$names[] = new AssignNameExpression($token->getValue(), $token->getLine());
if (!$stream->nextIf(Token::PUNCTUATION_TYPE, ',')) {
break;
}
}
$stream->expect(Token::PUNCTUATION_TYPE, ')');
$stream->expect(Token::ARROW_TYPE);
return new ArrowFunctionExpression($this->parseExpression(0), new Node($names), $line);
}
private function getPrimary(): AbstractExpression
{
$token = $this->parser->getCurrentToken();
if ($this->isUnary($token)) {
$operator = $this->unaryOperators[$token->getValue()];
$this->parser->getStream()->next();
$expr = $this->parseExpression($operator['precedence']);
$class = $operator['class'];
return $this->parsePostfixExpression(new $class($expr, $token->getLine()));
} elseif ($token->test(Token::PUNCTUATION_TYPE, '(')) {
$this->parser->getStream()->next();
$expr = $this->parseExpression();
$this->parser->getStream()->expect(Token::PUNCTUATION_TYPE, ')', 'An opened parenthesis is not properly closed');
return $this->parsePostfixExpression($expr);
}
return $this->parsePrimaryExpression();
}
private function parseConditionalExpression($expr): AbstractExpression
{
while ($this->parser->getStream()->nextIf(Token::PUNCTUATION_TYPE, '?')) {
if (!$this->parser->getStream()->nextIf(Token::PUNCTUATION_TYPE, ':')) {
$expr2 = $this->parseExpression();
if ($this->parser->getStream()->nextIf(Token::PUNCTUATION_TYPE, ':')) {
// Ternary operator (expr ? expr2 : expr3)
$expr3 = $this->parseExpression();
} else {
// Ternary without else (expr ? expr2)
$expr3 = new ConstantExpression('', $this->parser->getCurrentToken()->getLine());
}
} else {
// Ternary without then (expr ?: expr3)
$expr2 = $expr;
$expr3 = $this->parseExpression();
}
$expr = new ConditionalExpression($expr, $expr2, $expr3, $this->parser->getCurrentToken()->getLine());
}
return $expr;
}
private function isUnary(Token $token): bool
{
return $token->test(Token::OPERATOR_TYPE) && isset($this->unaryOperators[$token->getValue()]);
}
private function isBinary(Token $token): bool
{
return $token->test(Token::OPERATOR_TYPE) && isset($this->binaryOperators[$token->getValue()]);
}
public function parsePrimaryExpression()
{
$token = $this->parser->getCurrentToken();
switch ($token->getType()) {
case Token::NAME_TYPE:
$this->parser->getStream()->next();
switch ($token->getValue()) {
case 'true':
case 'TRUE':
$node = new ConstantExpression(true, $token->getLine());
break;
case 'false':
case 'FALSE':
$node = new ConstantExpression(false, $token->getLine());
break;
case 'none':
case 'NONE':
case 'null':
case 'NULL':
$node = new ConstantExpression(null, $token->getLine());
break;
default:
if ('(' === $this->parser->getCurrentToken()->getValue()) {
$node = $this->getFunctionNode($token->getValue(), $token->getLine());
} else {
$node = new NameExpression($token->getValue(), $token->getLine());
}
}
break;
case Token::NUMBER_TYPE:
$this->parser->getStream()->next();
$node = new ConstantExpression($token->getValue(), $token->getLine());
break;
case Token::STRING_TYPE:
case Token::INTERPOLATION_START_TYPE:
$node = $this->parseStringExpression();
break;
case Token::OPERATOR_TYPE:
if (preg_match(Lexer::REGEX_NAME, $token->getValue(), $matches) && $matches[0] == $token->getValue()) {
// in this context, string operators are variable names
$this->parser->getStream()->next();
$node = new NameExpression($token->getValue(), $token->getLine());
break;
}
if (isset($this->unaryOperators[$token->getValue()])) {
$class = $this->unaryOperators[$token->getValue()]['class'];
if (!\in_array($class, [NegUnary::class, PosUnary::class])) {
throw new SyntaxError(\sprintf('Unexpected unary operator "%s".', $token->getValue()), $token->getLine(), $this->parser->getStream()->getSourceContext());
}
$this->parser->getStream()->next();
$expr = $this->parsePrimaryExpression();
$node = new $class($expr, $token->getLine());
break;
}
// no break
default:
if ($token->test(Token::PUNCTUATION_TYPE, '[')) {
$node = $this->parseSequenceExpression();
} elseif ($token->test(Token::PUNCTUATION_TYPE, '{')) {
$node = $this->parseMappingExpression();
} elseif ($token->test(Token::OPERATOR_TYPE, '=') && ('==' === $this->parser->getStream()->look(-1)->getValue() || '!=' === $this->parser->getStream()->look(-1)->getValue())) {
throw new SyntaxError(\sprintf('Unexpected operator of value "%s". Did you try to use "===" or "!==" for strict comparison? Use "is same as(value)" instead.', $token->getValue()), $token->getLine(), $this->parser->getStream()->getSourceContext());
} else {
throw new SyntaxError(\sprintf('Unexpected token "%s" of value "%s".', Token::typeToEnglish($token->getType()), $token->getValue()), $token->getLine(), $this->parser->getStream()->getSourceContext());
}
}
return $this->parsePostfixExpression($node);
}
public function parseStringExpression()
{
$stream = $this->parser->getStream();
$nodes = [];
// a string cannot be followed by another string in a single expression
$nextCanBeString = true;
while (true) {
if ($nextCanBeString && $token = $stream->nextIf(Token::STRING_TYPE)) {
$nodes[] = new ConstantExpression($token->getValue(), $token->getLine());
$nextCanBeString = false;
} elseif ($stream->nextIf(Token::INTERPOLATION_START_TYPE)) {
$nodes[] = $this->parseExpression();
$stream->expect(Token::INTERPOLATION_END_TYPE);
$nextCanBeString = true;
} else {
break;
}
}
$expr = array_shift($nodes);
foreach ($nodes as $node) {
$expr = new ConcatBinary($expr, $node, $node->getTemplateLine());
}
return $expr;
}
/**
* @deprecated since 3.11, use parseSequenceExpression() instead
*/
public function parseArrayExpression()
{
trigger_deprecation('twig/twig', '3.11', 'Calling "%s()" is deprecated, use "parseSequenceExpression()" instead.', __METHOD__);
return $this->parseSequenceExpression();
}
public function parseSequenceExpression()
{
$stream = $this->parser->getStream();
$stream->expect(Token::PUNCTUATION_TYPE, '[', 'A sequence element was expected');
$node = new ArrayExpression([], $stream->getCurrent()->getLine());
$first = true;
while (!$stream->test(Token::PUNCTUATION_TYPE, ']')) {
if (!$first) {
$stream->expect(Token::PUNCTUATION_TYPE, ',', 'A sequence element must be followed by a comma');
// trailing ,?
if ($stream->test(Token::PUNCTUATION_TYPE, ']')) {
break;
}
}
$first = false;
if ($stream->test(Token::SPREAD_TYPE)) {
$stream->next();
$expr = $this->parseExpression();
$expr->setAttribute('spread', true);
$node->addElement($expr);
} else {
$node->addElement($this->parseExpression());
}
}
$stream->expect(Token::PUNCTUATION_TYPE, ']', 'An opened sequence is not properly closed');
return $node;
}
/**
* @deprecated since 3.11, use parseMappingExpression() instead
*/
public function parseHashExpression()
{
trigger_deprecation('twig/twig', '3.11', 'Calling "%s()" is deprecated, use "parseMappingExpression()" instead.', __METHOD__);
return $this->parseMappingExpression();
}
public function parseMappingExpression()
{
$stream = $this->parser->getStream();
$stream->expect(Token::PUNCTUATION_TYPE, '{', 'A mapping element was expected');
$node = new ArrayExpression([], $stream->getCurrent()->getLine());
$first = true;
while (!$stream->test(Token::PUNCTUATION_TYPE, '}')) {
if (!$first) {
$stream->expect(Token::PUNCTUATION_TYPE, ',', 'A mapping value must be followed by a comma');
// trailing ,?
if ($stream->test(Token::PUNCTUATION_TYPE, '}')) {
break;
}
}
$first = false;
if ($stream->test(Token::SPREAD_TYPE)) {
$stream->next();
$value = $this->parseExpression();
$value->setAttribute('spread', true);
$node->addElement($value);
continue;
}
// a mapping key can be:
//
// * a number -- 12
// * a string -- 'a'
// * a name, which is equivalent to a string -- a
// * an expression, which must be enclosed in parentheses -- (1 + 2)
if ($token = $stream->nextIf(Token::NAME_TYPE)) {
$key = new ConstantExpression($token->getValue(), $token->getLine());
// {a} is a shortcut for {a:a}
if ($stream->test(Token::PUNCTUATION_TYPE, [',', '}'])) {
$value = new NameExpression($key->getAttribute('value'), $key->getTemplateLine());
$node->addElement($value, $key);
continue;
}
} elseif (($token = $stream->nextIf(Token::STRING_TYPE)) || $token = $stream->nextIf(Token::NUMBER_TYPE)) {
$key = new ConstantExpression($token->getValue(), $token->getLine());
} elseif ($stream->test(Token::PUNCTUATION_TYPE, '(')) {
$key = $this->parseExpression();
} else {
$current = $stream->getCurrent();
throw new SyntaxError(\sprintf('A mapping key must be a quoted string, a number, a name, or an expression enclosed in parentheses (unexpected token "%s" of value "%s".', Token::typeToEnglish($current->getType()), $current->getValue()), $current->getLine(), $stream->getSourceContext());
}
$stream->expect(Token::PUNCTUATION_TYPE, ':', 'A mapping key must be followed by a colon (:)');
$value = $this->parseExpression();
$node->addElement($value, $key);
}
$stream->expect(Token::PUNCTUATION_TYPE, '}', 'An opened mapping is not properly closed');
return $node;
}
public function parsePostfixExpression($node)
{
while (true) {
$token = $this->parser->getCurrentToken();
if (Token::PUNCTUATION_TYPE == $token->getType()) {
if ('.' == $token->getValue() || '[' == $token->getValue()) {
$node = $this->parseSubscriptExpression($node);
} elseif ('|' == $token->getValue()) {
$node = $this->parseFilterExpression($node);
} else {
break;
}
} else {
break;
}
}
return $node;
}
public function getFunctionNode($name, $line)
{
if (null !== $alias = $this->parser->getImportedSymbol('function', $name)) {
$arguments = new ArrayExpression([], $line);
foreach ($this->parseArguments() as $n) {
$arguments->addElement($n);
}
$node = new MethodCallExpression($alias['node'], $alias['name'], $arguments, $line);
$node->setAttribute('safe', true);
return $node;
}
$args = $this->parseArguments(true);
$function = $this->getFunction($name, $line);
if ($function->getParserCallable()) {
$fakeNode = new Node(lineno: $line);
$fakeNode->setSourceContext($this->parser->getStream()->getSourceContext());
return ($function->getParserCallable())($this->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, $line);
}
public function parseSubscriptExpression($node)
{
$stream = $this->parser->getStream();
$token = $stream->next();
$lineno = $token->getLine();
$arguments = new ArrayExpression([], $lineno);
$type = Template::ANY_CALL;
if ('.' == $token->getValue()) {
$token = $stream->next();
if (
Token::NAME_TYPE == $token->getType()
||
Token::NUMBER_TYPE == $token->getType()
||
(Token::OPERATOR_TYPE == $token->getType() && preg_match(Lexer::REGEX_NAME, $token->getValue()))
) {
$arg = new ConstantExpression($token->getValue(), $lineno);
if ($stream->test(Token::PUNCTUATION_TYPE, '(')) {
$type = Template::METHOD_CALL;
foreach ($this->parseArguments() as $n) {
$arguments->addElement($n);
}
}
} else {
throw new SyntaxError(\sprintf('Expected name or number, got value "%s" of type %s.', $token->getValue(), Token::typeToEnglish($token->getType())), $lineno, $stream->getSourceContext());
}
if ($node instanceof NameExpression && null !== $this->parser->getImportedSymbol('template', $node->getAttribute('name'))) {
$name = $arg->getAttribute('value');
$node = new MethodCallExpression($node, 'macro_'.$name, $arguments, $lineno);
$node->setAttribute('safe', true);
return $node;
}
} else {
$type = Template::ARRAY_CALL;
// slice?
$slice = false;
if ($stream->test(Token::PUNCTUATION_TYPE, ':')) {
$slice = true;
$arg = new ConstantExpression(0, $token->getLine());
} else {
$arg = $this->parseExpression();
}
if ($stream->nextIf(Token::PUNCTUATION_TYPE, ':')) {
$slice = true;
}
if ($slice) {
if ($stream->test(Token::PUNCTUATION_TYPE, ']')) {
$length = new ConstantExpression(null, $token->getLine());
} else {
$length = $this->parseExpression();
}
$filter = $this->getFilter('slice', $token->getLine());
$arguments = new Node([$arg, $length]);
$filter = new ($filter->getNodeClass())($node, $filter, $arguments, $token->getLine());
$stream->expect(Token::PUNCTUATION_TYPE, ']');
return $filter;
}
$stream->expect(Token::PUNCTUATION_TYPE, ']');
}
return new GetAttrExpression($node, $arg, $arguments, $type, $lineno);
}
public function parseFilterExpression($node)
{
$this->parser->getStream()->next();
return $this->parseFilterExpressionRaw($node);
}
public function parseFilterExpressionRaw($node)
{
if (\func_num_args() > 1) {
trigger_deprecation('twig/twig', '3.12', 'Passing a second argument to "%s()" is deprecated.', __METHOD__);
}
while (true) {
$token = $this->parser->getStream()->expect(Token::NAME_TYPE);
if (!$this->parser->getStream()->test(Token::PUNCTUATION_TYPE, '(')) {
$arguments = new Node();
} else {
$arguments = $this->parseArguments(true, false, true);
}
$filter = $this->getFilter($token->getValue(), $token->getLine());
$ready = true;
if (!isset($this->readyNodes[$class = $filter->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 "TwigFilter" in the constructor instead of its name; please update your code and then add #[FirstClassTwigCallableReady] attribute to the constructor.', $class);
}
$node = new $class($node, $ready ? $filter : new ConstantExpression($filter->getName(), $token->getLine()), $arguments, $token->getLine());
if (!$this->parser->getStream()->test(Token::PUNCTUATION_TYPE, '|')) {
break;
}
$this->parser->getStream()->next();
}
return $node;
}
/**
* Parses arguments.
*
* @param bool $namedArguments Whether to allow named arguments or not
* @param bool $definition Whether we are parsing arguments for a function (or macro) definition
*
* @return Node
*
* @throws SyntaxError
*/
public function parseArguments($namedArguments = false, $definition = false, $allowArrow = false)
{
$args = [];
$stream = $this->parser->getStream();
$stream->expect(Token::PUNCTUATION_TYPE, '(', 'A list of arguments must begin with an opening parenthesis');
while (!$stream->test(Token::PUNCTUATION_TYPE, ')')) {
if (!empty($args)) {
$stream->expect(Token::PUNCTUATION_TYPE, ',', 'Arguments must be separated by a comma');
// if the comma above was a trailing comma, early exit the argument parse loop
if ($stream->test(Token::PUNCTUATION_TYPE, ')')) {
break;
}
}
if ($definition) {
$token = $stream->expect(Token::NAME_TYPE, null, 'An argument must be a name');
$value = new NameExpression($token->getValue(), $this->parser->getCurrentToken()->getLine());
} else {
$value = $this->parseExpression(0, $allowArrow);
}
$name = null;
if ($namedArguments && (($token = $stream->nextIf(Token::OPERATOR_TYPE, '=')) || ($token = $stream->nextIf(Token::PUNCTUATION_TYPE, ':')))) {
if (!$value instanceof NameExpression) {
throw new SyntaxError(\sprintf('A parameter name must be a string, "%s" given.', \get_class($value)), $token->getLine(), $stream->getSourceContext());
}
$name = $value->getAttribute('name');
if ($definition) {
$value = $this->parsePrimaryExpression();
if (!$this->checkConstantExpression($value)) {
throw new SyntaxError('A default value for an argument must be a constant (a boolean, a string, a number, a sequence, or a mapping).', $token->getLine(), $stream->getSourceContext());
}
} else {
$value = $this->parseExpression(0, $allowArrow);
}
}
if ($definition) {
if (null === $name) {
$name = $value->getAttribute('name');
$value = new ConstantExpression(null, $this->parser->getCurrentToken()->getLine());
$value->setAttribute('is_implicit', true);
}
$args[$name] = $value;
} else {
if (null === $name) {
$args[] = $value;
} else {
$args[$name] = $value;
}
}
}
$stream->expect(Token::PUNCTUATION_TYPE, ')', 'A list of arguments must be closed by a parenthesis');
return new Node($args);
}
public function parseAssignmentExpression()
{
$stream = $this->parser->getStream();
$targets = [];
while (true) {
$token = $this->parser->getCurrentToken();
if ($stream->test(Token::OPERATOR_TYPE) && preg_match(Lexer::REGEX_NAME, $token->getValue())) {
// in this context, string operators are variable names
$this->parser->getStream()->next();
} else {
$stream->expect(Token::NAME_TYPE, null, 'Only variables can be assigned to');
}
$value = $token->getValue();
if (\in_array(strtr($value, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz'), ['true', 'false', 'none', 'null'])) {
throw new SyntaxError(\sprintf('You cannot assign a value to "%s".', $value), $token->getLine(), $stream->getSourceContext());
}
$targets[] = new AssignNameExpression($value, $token->getLine());
if (!$stream->nextIf(Token::PUNCTUATION_TYPE, ',')) {
break;
}
}
return new Node($targets);
}
public function parseMultitargetExpression()
{
$targets = [];
while (true) {
$targets[] = $this->parseExpression();
if (!$this->parser->getStream()->nextIf(Token::PUNCTUATION_TYPE, ',')) {
break;
}
}
return new Node($targets);
}
private function parseNotTestExpression(Node $node): NotUnary
{
return new NotUnary($this->parseTestExpression($node), $this->parser->getCurrentToken()->getLine());
}
private function parseTestExpression(Node $node): TestExpression
{
$stream = $this->parser->getStream();
$test = $this->getTest($node->getTemplateLine());
$arguments = null;
if ($stream->test(Token::PUNCTUATION_TYPE, '(')) {
$arguments = $this->parseArguments(true);
} elseif ($test->hasOneMandatoryArgument()) {
$arguments = new Node([0 => $this->parsePrimaryExpression()]);
}
if ('defined' === $test->getName() && $node instanceof NameExpression && null !== $alias = $this->parser->getImportedSymbol('function', $node->getAttribute('name'))) {
$node = new MethodCallExpression($alias['node'], $alias['name'], new ArrayExpression([], $node->getTemplateLine()), $node->getTemplateLine());
$node->setAttribute('safe', true);
}
$ready = $test instanceof TwigTest;
if (!isset($this->readyNodes[$class = $test->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 "TwigTest" in the constructor instead of its name; please update your code and then add #[FirstClassTwigCallableReady] attribute to the constructor.', $class);
}
return new $class($node, $ready ? $test : $test->getName(), $arguments, $this->parser->getCurrentToken()->getLine());
}
private function getTest(int $line): TwigTest
{
$stream = $this->parser->getStream();
$name = $stream->expect(Token::NAME_TYPE)->getValue();
if ($stream->test(Token::NAME_TYPE)) {
// try 2-words tests
$name = $name.' '.$this->parser->getCurrentToken()->getValue();
if ($test = $this->env->getTest($name)) {
$stream->next();
}
} else {
$test = $this->env->getTest($name);
}
if (!$test) {
$e = new SyntaxError(\sprintf('Unknown "%s" test.', $name), $line, $stream->getSourceContext());
$e->addSuggestions($name, array_keys($this->env->getTests()));
throw $e;
}
if ($test->isDeprecated()) {
$stream = $this->parser->getStream();
$message = \sprintf('Twig Test "%s" is deprecated', $test->getName());
if ($test->getAlternative()) {
$message .= \sprintf('. Use "%s" instead', $test->getAlternative());
}
$src = $stream->getSourceContext();
$message .= \sprintf(' in %s at line %d.', $src->getPath() ?: $src->getName(), $stream->getCurrent()->getLine());
trigger_deprecation($test->getDeprecatingPackage(), $test->getDeprecatedVersion(), $message);
}
return $test;
}
private function getFunction(string $name, int $line): TwigFunction
{
if (!$function = $this->env->getFunction($name)) {
$e = new SyntaxError(\sprintf('Unknown "%s" function.', $name), $line, $this->parser->getStream()->getSourceContext());
$e->addSuggestions($name, array_keys($this->env->getFunctions()));
throw $e;
}
if ($function->isDeprecated()) {
$message = \sprintf('Twig Function "%s" is deprecated', $function->getName());
if ($function->getAlternative()) {
$message .= \sprintf('. Use "%s" instead', $function->getAlternative());
}
$src = $this->parser->getStream()->getSourceContext();
$message .= \sprintf(' in %s at line %d.', $src->getPath() ?: $src->getName(), $line);
trigger_deprecation($function->getDeprecatingPackage(), $function->getDeprecatedVersion(), $message);
}
return $function;
}
private function getFilter(string $name, int $line): TwigFilter
{
if (!$filter = $this->env->getFilter($name)) {
$e = new SyntaxError(\sprintf('Unknown "%s" filter.', $name), $line, $this->parser->getStream()->getSourceContext());
$e->addSuggestions($name, array_keys($this->env->getFilters()));
throw $e;
}
if ($filter->isDeprecated()) {
$message = \sprintf('Twig Filter "%s" is deprecated', $filter->getName());
if ($filter->getAlternative()) {
$message .= \sprintf('. Use "%s" instead', $filter->getAlternative());
}
$src = $this->parser->getStream()->getSourceContext();
$message .= \sprintf(' in %s at line %d.', $src->getPath() ?: $src->getName(), $line);
trigger_deprecation($filter->getDeprecatingPackage(), $filter->getDeprecatedVersion(), $message);
}
return $filter;
}
// checks that the node only contains "constant" elements
private function checkConstantExpression(Node $node): bool
{
if (!($node instanceof ConstantExpression || $node instanceof ArrayExpression
|| $node instanceof NegUnary || $node instanceof PosUnary
)) {
return false;
}
foreach ($node as $n) {
if (!$this->checkConstantExpression($n)) {
return false;
}
}
return true;
}
}

vendor/twig/twig/src/ExpressionParser.php line 830