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744 lines
30 KiB
744 lines
30 KiB
<?php
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/*
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* This file is part of Twig.
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*
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* (c) Fabien Potencier
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* (c) Armin Ronacher
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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/**
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* Parses expressions.
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*
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* This parser implements a "Precedence climbing" algorithm.
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*
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* @see https://www.engr.mun.ca/~theo/Misc/exp_parsing.htm
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* @see https://en.wikipedia.org/wiki/Operator-precedence_parser
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*
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* @author Fabien Potencier <[email protected]>
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*
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* @internal
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*/
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class Twig_ExpressionParser
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{
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const OPERATOR_LEFT = 1;
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const OPERATOR_RIGHT = 2;
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protected $parser;
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protected $unaryOperators;
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protected $binaryOperators;
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private $env;
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public function __construct(Twig_Parser $parser, $env = null)
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{
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$this->parser = $parser;
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if ($env instanceof Twig_Environment) {
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$this->env = $env;
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$this->unaryOperators = $env->getUnaryOperators();
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$this->binaryOperators = $env->getBinaryOperators();
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} else {
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@trigger_error('Passing the operators as constructor arguments to '.__METHOD__.' is deprecated since version 1.27. Pass the environment instead.', E_USER_DEPRECATED);
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$this->env = $parser->getEnvironment();
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$this->unaryOperators = func_get_arg(1);
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$this->binaryOperators = func_get_arg(2);
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}
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}
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public function parseExpression($precedence = 0)
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{
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$expr = $this->getPrimary();
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$token = $this->parser->getCurrentToken();
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while ($this->isBinary($token) && $this->binaryOperators[$token->getValue()]['precedence'] >= $precedence) {
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$op = $this->binaryOperators[$token->getValue()];
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$this->parser->getStream()->next();
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if ('is not' === $token->getValue()) {
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$expr = $this->parseNotTestExpression($expr);
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} elseif ('is' === $token->getValue()) {
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$expr = $this->parseTestExpression($expr);
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} elseif (isset($op['callable'])) {
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$expr = call_user_func($op['callable'], $this->parser, $expr);
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} else {
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$expr1 = $this->parseExpression(self::OPERATOR_LEFT === $op['associativity'] ? $op['precedence'] + 1 : $op['precedence']);
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$class = $op['class'];
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$expr = new $class($expr, $expr1, $token->getLine());
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}
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$token = $this->parser->getCurrentToken();
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}
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if (0 === $precedence) {
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return $this->parseConditionalExpression($expr);
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}
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return $expr;
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}
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protected function getPrimary()
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{
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$token = $this->parser->getCurrentToken();
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if ($this->isUnary($token)) {
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$operator = $this->unaryOperators[$token->getValue()];
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$this->parser->getStream()->next();
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$expr = $this->parseExpression($operator['precedence']);
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$class = $operator['class'];
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return $this->parsePostfixExpression(new $class($expr, $token->getLine()));
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} elseif ($token->test(Twig_Token::PUNCTUATION_TYPE, '(')) {
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$this->parser->getStream()->next();
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$expr = $this->parseExpression();
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$this->parser->getStream()->expect(Twig_Token::PUNCTUATION_TYPE, ')', 'An opened parenthesis is not properly closed');
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return $this->parsePostfixExpression($expr);
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}
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return $this->parsePrimaryExpression();
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}
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protected function parseConditionalExpression($expr)
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{
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while ($this->parser->getStream()->nextIf(Twig_Token::PUNCTUATION_TYPE, '?')) {
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if (!$this->parser->getStream()->nextIf(Twig_Token::PUNCTUATION_TYPE, ':')) {
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$expr2 = $this->parseExpression();
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if ($this->parser->getStream()->nextIf(Twig_Token::PUNCTUATION_TYPE, ':')) {
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$expr3 = $this->parseExpression();
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} else {
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$expr3 = new Twig_Node_Expression_Constant('', $this->parser->getCurrentToken()->getLine());
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}
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} else {
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$expr2 = $expr;
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$expr3 = $this->parseExpression();
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}
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$expr = new Twig_Node_Expression_Conditional($expr, $expr2, $expr3, $this->parser->getCurrentToken()->getLine());
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}
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return $expr;
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}
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protected function isUnary(Twig_Token $token)
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{
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return $token->test(Twig_Token::OPERATOR_TYPE) && isset($this->unaryOperators[$token->getValue()]);
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}
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protected function isBinary(Twig_Token $token)
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{
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return $token->test(Twig_Token::OPERATOR_TYPE) && isset($this->binaryOperators[$token->getValue()]);
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}
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public function parsePrimaryExpression()
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{
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$token = $this->parser->getCurrentToken();
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switch ($token->getType()) {
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case Twig_Token::NAME_TYPE:
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$this->parser->getStream()->next();
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switch ($token->getValue()) {
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case 'true':
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case 'TRUE':
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$node = new Twig_Node_Expression_Constant(true, $token->getLine());
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break;
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case 'false':
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case 'FALSE':
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$node = new Twig_Node_Expression_Constant(false, $token->getLine());
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break;
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case 'none':
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case 'NONE':
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case 'null':
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case 'NULL':
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$node = new Twig_Node_Expression_Constant(null, $token->getLine());
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break;
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default:
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if ('(' === $this->parser->getCurrentToken()->getValue()) {
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$node = $this->getFunctionNode($token->getValue(), $token->getLine());
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} else {
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$node = new Twig_Node_Expression_Name($token->getValue(), $token->getLine());
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}
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}
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break;
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case Twig_Token::NUMBER_TYPE:
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$this->parser->getStream()->next();
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$node = new Twig_Node_Expression_Constant($token->getValue(), $token->getLine());
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break;
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case Twig_Token::STRING_TYPE:
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case Twig_Token::INTERPOLATION_START_TYPE:
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$node = $this->parseStringExpression();
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break;
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case Twig_Token::OPERATOR_TYPE:
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if (preg_match(Twig_Lexer::REGEX_NAME, $token->getValue(), $matches) && $matches[0] == $token->getValue()) {
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// in this context, string operators are variable names
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$this->parser->getStream()->next();
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$node = new Twig_Node_Expression_Name($token->getValue(), $token->getLine());
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break;
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} elseif (isset($this->unaryOperators[$token->getValue()])) {
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$class = $this->unaryOperators[$token->getValue()]['class'];
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$ref = new ReflectionClass($class);
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$negClass = 'Twig_Node_Expression_Unary_Neg';
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$posClass = 'Twig_Node_Expression_Unary_Pos';
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if (!(in_array($ref->getName(), array($negClass, $posClass)) || $ref->isSubclassOf($negClass) || $ref->isSubclassOf($posClass))) {
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throw new Twig_Error_Syntax(sprintf('Unexpected unary operator "%s".', $token->getValue()), $token->getLine(), $this->parser->getStream()->getSourceContext());
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}
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$this->parser->getStream()->next();
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$expr = $this->parsePrimaryExpression();
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$node = new $class($expr, $token->getLine());
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break;
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}
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// no break
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default:
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if ($token->test(Twig_Token::PUNCTUATION_TYPE, '[')) {
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$node = $this->parseArrayExpression();
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} elseif ($token->test(Twig_Token::PUNCTUATION_TYPE, '{')) {
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$node = $this->parseHashExpression();
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} elseif ($token->test(Twig_Token::OPERATOR_TYPE, '=') && ('==' === $this->parser->getStream()->look(-1)->getValue() || '!=' === $this->parser->getStream()->look(-1)->getValue())) {
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throw new Twig_Error_Syntax(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(), $this->parser->getStream()->getSourceContext());
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} else {
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throw new Twig_Error_Syntax(sprintf('Unexpected token "%s" of value "%s".', Twig_Token::typeToEnglish($token->getType()), $token->getValue()), $token->getLine(), $this->parser->getStream()->getSourceContext());
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}
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}
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return $this->parsePostfixExpression($node);
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}
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public function parseStringExpression()
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{
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$stream = $this->parser->getStream();
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$nodes = array();
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// a string cannot be followed by another string in a single expression
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$nextCanBeString = true;
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while (true) {
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if ($nextCanBeString && $token = $stream->nextIf(Twig_Token::STRING_TYPE)) {
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$nodes[] = new Twig_Node_Expression_Constant($token->getValue(), $token->getLine());
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$nextCanBeString = false;
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} elseif ($stream->nextIf(Twig_Token::INTERPOLATION_START_TYPE)) {
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$nodes[] = $this->parseExpression();
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$stream->expect(Twig_Token::INTERPOLATION_END_TYPE);
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$nextCanBeString = true;
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} else {
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break;
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}
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}
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$expr = array_shift($nodes);
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foreach ($nodes as $node) {
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$expr = new Twig_Node_Expression_Binary_Concat($expr, $node, $node->getTemplateLine());
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}
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return $expr;
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}
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public function parseArrayExpression()
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{
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$stream = $this->parser->getStream();
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$stream->expect(Twig_Token::PUNCTUATION_TYPE, '[', 'An array element was expected');
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$node = new Twig_Node_Expression_Array(array(), $stream->getCurrent()->getLine());
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$first = true;
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while (!$stream->test(Twig_Token::PUNCTUATION_TYPE, ']')) {
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if (!$first) {
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$stream->expect(Twig_Token::PUNCTUATION_TYPE, ',', 'An array element must be followed by a comma');
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// trailing ,?
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if ($stream->test(Twig_Token::PUNCTUATION_TYPE, ']')) {
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break;
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}
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}
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$first = false;
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$node->addElement($this->parseExpression());
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}
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$stream->expect(Twig_Token::PUNCTUATION_TYPE, ']', 'An opened array is not properly closed');
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return $node;
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}
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public function parseHashExpression()
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{
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$stream = $this->parser->getStream();
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$stream->expect(Twig_Token::PUNCTUATION_TYPE, '{', 'A hash element was expected');
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$node = new Twig_Node_Expression_Array(array(), $stream->getCurrent()->getLine());
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$first = true;
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while (!$stream->test(Twig_Token::PUNCTUATION_TYPE, '}')) {
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if (!$first) {
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$stream->expect(Twig_Token::PUNCTUATION_TYPE, ',', 'A hash value must be followed by a comma');
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// trailing ,?
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if ($stream->test(Twig_Token::PUNCTUATION_TYPE, '}')) {
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break;
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}
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}
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$first = false;
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// a hash key can be:
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//
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// * a number -- 12
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// * a string -- 'a'
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// * a name, which is equivalent to a string -- a
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// * an expression, which must be enclosed in parentheses -- (1 + 2)
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if (($token = $stream->nextIf(Twig_Token::STRING_TYPE)) || ($token = $stream->nextIf(Twig_Token::NAME_TYPE)) || $token = $stream->nextIf(Twig_Token::NUMBER_TYPE)) {
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$key = new Twig_Node_Expression_Constant($token->getValue(), $token->getLine());
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} elseif ($stream->test(Twig_Token::PUNCTUATION_TYPE, '(')) {
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$key = $this->parseExpression();
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} else {
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$current = $stream->getCurrent();
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throw new Twig_Error_Syntax(sprintf('A hash key must be a quoted string, a number, a name, or an expression enclosed in parentheses (unexpected token "%s" of value "%s".', Twig_Token::typeToEnglish($current->getType()), $current->getValue()), $current->getLine(), $stream->getSourceContext());
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}
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$stream->expect(Twig_Token::PUNCTUATION_TYPE, ':', 'A hash key must be followed by a colon (:)');
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$value = $this->parseExpression();
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$node->addElement($value, $key);
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}
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$stream->expect(Twig_Token::PUNCTUATION_TYPE, '}', 'An opened hash is not properly closed');
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return $node;
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}
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public function parsePostfixExpression($node)
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{
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while (true) {
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$token = $this->parser->getCurrentToken();
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if (Twig_Token::PUNCTUATION_TYPE == $token->getType()) {
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if ('.' == $token->getValue() || '[' == $token->getValue()) {
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$node = $this->parseSubscriptExpression($node);
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} elseif ('|' == $token->getValue()) {
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$node = $this->parseFilterExpression($node);
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} else {
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break;
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}
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} else {
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break;
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}
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}
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return $node;
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}
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public function getFunctionNode($name, $line)
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{
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switch ($name) {
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case 'parent':
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$this->parseArguments();
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if (!count($this->parser->getBlockStack())) {
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throw new Twig_Error_Syntax('Calling "parent" outside a block is forbidden.', $line, $this->parser->getStream()->getSourceContext());
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}
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if (!$this->parser->getParent() && !$this->parser->hasTraits()) {
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throw new Twig_Error_Syntax('Calling "parent" on a template that does not extend nor "use" another template is forbidden.', $line, $this->parser->getStream()->getSourceContext());
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}
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return new Twig_Node_Expression_Parent($this->parser->peekBlockStack(), $line);
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case 'block':
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$args = $this->parseArguments();
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if (count($args) < 1) {
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throw new Twig_Error_Syntax('The "block" function takes one argument (the block name).', $line, $this->parser->getStream()->getSourceContext());
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}
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return new Twig_Node_Expression_BlockReference($args->getNode(0), count($args) > 1 ? $args->getNode(1) : null, $line);
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case 'attribute':
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$args = $this->parseArguments();
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if (count($args) < 2) {
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throw new Twig_Error_Syntax('The "attribute" function takes at least two arguments (the variable and the attributes).', $line, $this->parser->getStream()->getSourceContext());
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}
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return new Twig_Node_Expression_GetAttr($args->getNode(0), $args->getNode(1), count($args) > 2 ? $args->getNode(2) : null, Twig_Template::ANY_CALL, $line);
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default:
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if (null !== $alias = $this->parser->getImportedSymbol('function', $name)) {
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$arguments = new Twig_Node_Expression_Array(array(), $line);
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foreach ($this->parseArguments() as $n) {
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$arguments->addElement($n);
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}
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$node = new Twig_Node_Expression_MethodCall($alias['node'], $alias['name'], $arguments, $line);
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$node->setAttribute('safe', true);
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return $node;
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}
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$args = $this->parseArguments(true);
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$class = $this->getFunctionNodeClass($name, $line);
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return new $class($name, $args, $line);
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}
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}
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public function parseSubscriptExpression($node)
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{
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$stream = $this->parser->getStream();
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$token = $stream->next();
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$lineno = $token->getLine();
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$arguments = new Twig_Node_Expression_Array(array(), $lineno);
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$type = Twig_Template::ANY_CALL;
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if ('.' == $token->getValue()) {
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$token = $stream->next();
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if (
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Twig_Token::NAME_TYPE == $token->getType()
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||
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Twig_Token::NUMBER_TYPE == $token->getType()
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||
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(Twig_Token::OPERATOR_TYPE == $token->getType() && preg_match(Twig_Lexer::REGEX_NAME, $token->getValue()))
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) {
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$arg = new Twig_Node_Expression_Constant($token->getValue(), $lineno);
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if ($stream->test(Twig_Token::PUNCTUATION_TYPE, '(')) {
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$type = Twig_Template::METHOD_CALL;
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foreach ($this->parseArguments() as $n) {
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$arguments->addElement($n);
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}
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}
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} else {
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throw new Twig_Error_Syntax('Expected name or number.', $lineno, $stream->getSourceContext());
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}
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if ($node instanceof Twig_Node_Expression_Name && null !== $this->parser->getImportedSymbol('template', $node->getAttribute('name'))) {
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if (!$arg instanceof Twig_Node_Expression_Constant) {
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throw new Twig_Error_Syntax(sprintf('Dynamic macro names are not supported (called on "%s").', $node->getAttribute('name')), $token->getLine(), $stream->getSourceContext());
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}
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$name = $arg->getAttribute('value');
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if ($this->parser->isReservedMacroName($name)) {
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throw new Twig_Error_Syntax(sprintf('"%s" cannot be called as macro as it is a reserved keyword.', $name), $token->getLine(), $stream->getSourceContext());
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}
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$node = new Twig_Node_Expression_MethodCall($node, 'get'.$name, $arguments, $lineno);
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$node->setAttribute('safe', true);
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return $node;
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}
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} else {
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$type = Twig_Template::ARRAY_CALL;
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// slice?
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$slice = false;
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if ($stream->test(Twig_Token::PUNCTUATION_TYPE, ':')) {
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$slice = true;
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$arg = new Twig_Node_Expression_Constant(0, $token->getLine());
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} else {
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$arg = $this->parseExpression();
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}
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if ($stream->nextIf(Twig_Token::PUNCTUATION_TYPE, ':')) {
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$slice = true;
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}
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if ($slice) {
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if ($stream->test(Twig_Token::PUNCTUATION_TYPE, ']')) {
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$length = new Twig_Node_Expression_Constant(null, $token->getLine());
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} else {
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$length = $this->parseExpression();
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}
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$class = $this->getFilterNodeClass('slice', $token->getLine());
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$arguments = new Twig_Node(array($arg, $length));
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$filter = new $class($node, new Twig_Node_Expression_Constant('slice', $token->getLine()), $arguments, $token->getLine());
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$stream->expect(Twig_Token::PUNCTUATION_TYPE, ']');
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return $filter;
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}
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$stream->expect(Twig_Token::PUNCTUATION_TYPE, ']');
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}
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return new Twig_Node_Expression_GetAttr($node, $arg, $arguments, $type, $lineno);
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}
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public function parseFilterExpression($node)
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{
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$this->parser->getStream()->next();
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return $this->parseFilterExpressionRaw($node);
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}
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public function parseFilterExpressionRaw($node, $tag = null)
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{
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while (true) {
|
|
$token = $this->parser->getStream()->expect(Twig_Token::NAME_TYPE);
|
|
|
|
$name = new Twig_Node_Expression_Constant($token->getValue(), $token->getLine());
|
|
if (!$this->parser->getStream()->test(Twig_Token::PUNCTUATION_TYPE, '(')) {
|
|
$arguments = new Twig_Node();
|
|
} else {
|
|
$arguments = $this->parseArguments(true);
|
|
}
|
|
|
|
$class = $this->getFilterNodeClass($name->getAttribute('value'), $token->getLine());
|
|
|
|
$node = new $class($node, $name, $arguments, $token->getLine(), $tag);
|
|
|
|
if (!$this->parser->getStream()->test(Twig_Token::PUNCTUATION_TYPE, '|')) {
|
|
break;
|
|
}
|
|
|
|
$this->parser->getStream()->next();
|
|
}
|
|
|
|
return $node;
|
|
}
|
|
|
|
/**
|
|
* Parses arguments.
|
|
*
|
|
* @param bool $namedArguments Whether to allow named arguments or not
|
|
* @param bool $definition Whether we are parsing arguments for a function definition
|
|
*
|
|
* @return Twig_Node
|
|
*
|
|
* @throws Twig_Error_Syntax
|
|
*/
|
|
public function parseArguments($namedArguments = false, $definition = false)
|
|
{
|
|
$args = array();
|
|
$stream = $this->parser->getStream();
|
|
|
|
$stream->expect(Twig_Token::PUNCTUATION_TYPE, '(', 'A list of arguments must begin with an opening parenthesis');
|
|
while (!$stream->test(Twig_Token::PUNCTUATION_TYPE, ')')) {
|
|
if (!empty($args)) {
|
|
$stream->expect(Twig_Token::PUNCTUATION_TYPE, ',', 'Arguments must be separated by a comma');
|
|
}
|
|
|
|
if ($definition) {
|
|
$token = $stream->expect(Twig_Token::NAME_TYPE, null, 'An argument must be a name');
|
|
$value = new Twig_Node_Expression_Name($token->getValue(), $this->parser->getCurrentToken()->getLine());
|
|
} else {
|
|
$value = $this->parseExpression();
|
|
}
|
|
|
|
$name = null;
|
|
if ($namedArguments && $token = $stream->nextIf(Twig_Token::OPERATOR_TYPE, '=')) {
|
|
if (!$value instanceof Twig_Node_Expression_Name) {
|
|
throw new Twig_Error_Syntax(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 Twig_Error_Syntax(sprintf('A default value for an argument must be a constant (a boolean, a string, a number, or an array).'), $token->getLine(), $stream->getSourceContext());
|
|
}
|
|
} else {
|
|
$value = $this->parseExpression();
|
|
}
|
|
}
|
|
|
|
if ($definition) {
|
|
if (null === $name) {
|
|
$name = $value->getAttribute('name');
|
|
$value = new Twig_Node_Expression_Constant(null, $this->parser->getCurrentToken()->getLine());
|
|
}
|
|
$args[$name] = $value;
|
|
} else {
|
|
if (null === $name) {
|
|
$args[] = $value;
|
|
} else {
|
|
$args[$name] = $value;
|
|
}
|
|
}
|
|
}
|
|
$stream->expect(Twig_Token::PUNCTUATION_TYPE, ')', 'A list of arguments must be closed by a parenthesis');
|
|
|
|
return new Twig_Node($args);
|
|
}
|
|
|
|
public function parseAssignmentExpression()
|
|
{
|
|
$stream = $this->parser->getStream();
|
|
$targets = array();
|
|
while (true) {
|
|
$token = $stream->expect(Twig_Token::NAME_TYPE, null, 'Only variables can be assigned to');
|
|
$value = $token->getValue();
|
|
if (in_array(strtolower($value), array('true', 'false', 'none', 'null'))) {
|
|
throw new Twig_Error_Syntax(sprintf('You cannot assign a value to "%s".', $value), $token->getLine(), $stream->getSourceContext());
|
|
}
|
|
$targets[] = new Twig_Node_Expression_AssignName($value, $token->getLine());
|
|
|
|
if (!$stream->nextIf(Twig_Token::PUNCTUATION_TYPE, ',')) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
return new Twig_Node($targets);
|
|
}
|
|
|
|
public function parseMultitargetExpression()
|
|
{
|
|
$targets = array();
|
|
while (true) {
|
|
$targets[] = $this->parseExpression();
|
|
if (!$this->parser->getStream()->nextIf(Twig_Token::PUNCTUATION_TYPE, ',')) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
return new Twig_Node($targets);
|
|
}
|
|
|
|
private function parseNotTestExpression(Twig_NodeInterface $node)
|
|
{
|
|
return new Twig_Node_Expression_Unary_Not($this->parseTestExpression($node), $this->parser->getCurrentToken()->getLine());
|
|
}
|
|
|
|
private function parseTestExpression(Twig_NodeInterface $node)
|
|
{
|
|
$stream = $this->parser->getStream();
|
|
list($name, $test) = $this->getTest($node->getTemplateLine());
|
|
|
|
$class = $this->getTestNodeClass($test);
|
|
$arguments = null;
|
|
if ($stream->test(Twig_Token::PUNCTUATION_TYPE, '(')) {
|
|
$arguments = $this->parser->getExpressionParser()->parseArguments(true);
|
|
}
|
|
|
|
return new $class($node, $name, $arguments, $this->parser->getCurrentToken()->getLine());
|
|
}
|
|
|
|
private function getTest($line)
|
|
{
|
|
$stream = $this->parser->getStream();
|
|
$name = $stream->expect(Twig_Token::NAME_TYPE)->getValue();
|
|
|
|
if ($test = $this->env->getTest($name)) {
|
|
return array($name, $test);
|
|
}
|
|
|
|
if ($stream->test(Twig_Token::NAME_TYPE)) {
|
|
// try 2-words tests
|
|
$name = $name.' '.$this->parser->getCurrentToken()->getValue();
|
|
|
|
if ($test = $this->env->getTest($name)) {
|
|
$stream->next();
|
|
|
|
return array($name, $test);
|
|
}
|
|
}
|
|
|
|
$e = new Twig_Error_Syntax(sprintf('Unknown "%s" test.', $name), $line, $stream->getSourceContext());
|
|
$e->addSuggestions($name, array_keys($this->env->getTests()));
|
|
|
|
throw $e;
|
|
}
|
|
|
|
private function getTestNodeClass($test)
|
|
{
|
|
if ($test instanceof Twig_SimpleTest && $test->isDeprecated()) {
|
|
$stream = $this->parser->getStream();
|
|
$message = sprintf('Twig Test "%s" is deprecated', $test->getName());
|
|
if (!is_bool($test->getDeprecatedVersion())) {
|
|
$message .= sprintf(' since version %s', $test->getDeprecatedVersion());
|
|
}
|
|
if ($test->getAlternative()) {
|
|
$message .= sprintf('. Use "%s" instead', $test->getAlternative());
|
|
}
|
|
$src = $stream->getSourceContext();
|
|
$message .= sprintf(' in %s at line %d.', $src->getPath() ? $src->getPath() : $src->getName(), $stream->getCurrent()->getLine());
|
|
|
|
@trigger_error($message, E_USER_DEPRECATED);
|
|
}
|
|
|
|
if ($test instanceof Twig_SimpleTest) {
|
|
return $test->getNodeClass();
|
|
}
|
|
|
|
return $test instanceof Twig_Test_Node ? $test->getClass() : 'Twig_Node_Expression_Test';
|
|
}
|
|
|
|
protected function getFunctionNodeClass($name, $line)
|
|
{
|
|
if (false === $function = $this->env->getFunction($name)) {
|
|
$e = new Twig_Error_Syntax(sprintf('Unknown "%s" function.', $name), $line, $this->parser->getStream()->getSourceContext());
|
|
$e->addSuggestions($name, array_keys($this->env->getFunctions()));
|
|
|
|
throw $e;
|
|
}
|
|
|
|
if ($function instanceof Twig_SimpleFunction && $function->isDeprecated()) {
|
|
$message = sprintf('Twig Function "%s" is deprecated', $function->getName());
|
|
if (!is_bool($function->getDeprecatedVersion())) {
|
|
$message .= sprintf(' since version %s', $function->getDeprecatedVersion());
|
|
}
|
|
if ($function->getAlternative()) {
|
|
$message .= sprintf('. Use "%s" instead', $function->getAlternative());
|
|
}
|
|
$src = $this->parser->getStream()->getSourceContext();
|
|
$message .= sprintf(' in %s at line %d.', $src->getPath() ? $src->getPath() : $src->getName(), $line);
|
|
|
|
@trigger_error($message, E_USER_DEPRECATED);
|
|
}
|
|
|
|
if ($function instanceof Twig_SimpleFunction) {
|
|
return $function->getNodeClass();
|
|
}
|
|
|
|
return $function instanceof Twig_Function_Node ? $function->getClass() : 'Twig_Node_Expression_Function';
|
|
}
|
|
|
|
protected function getFilterNodeClass($name, $line)
|
|
{
|
|
if (false === $filter = $this->env->getFilter($name)) {
|
|
$e = new Twig_Error_Syntax(sprintf('Unknown "%s" filter.', $name), $line, $this->parser->getStream()->getSourceContext());
|
|
$e->addSuggestions($name, array_keys($this->env->getFilters()));
|
|
|
|
throw $e;
|
|
}
|
|
|
|
if ($filter instanceof Twig_SimpleFilter && $filter->isDeprecated()) {
|
|
$message = sprintf('Twig Filter "%s" is deprecated', $filter->getName());
|
|
if (!is_bool($filter->getDeprecatedVersion())) {
|
|
$message .= sprintf(' since version %s', $filter->getDeprecatedVersion());
|
|
}
|
|
if ($filter->getAlternative()) {
|
|
$message .= sprintf('. Use "%s" instead', $filter->getAlternative());
|
|
}
|
|
$src = $this->parser->getStream()->getSourceContext();
|
|
$message .= sprintf(' in %s at line %d.', $src->getPath() ? $src->getPath() : $src->getName(), $line);
|
|
|
|
@trigger_error($message, E_USER_DEPRECATED);
|
|
}
|
|
|
|
if ($filter instanceof Twig_SimpleFilter) {
|
|
return $filter->getNodeClass();
|
|
}
|
|
|
|
return $filter instanceof Twig_Filter_Node ? $filter->getClass() : 'Twig_Node_Expression_Filter';
|
|
}
|
|
|
|
// checks that the node only contains "constant" elements
|
|
protected function checkConstantExpression(Twig_NodeInterface $node)
|
|
{
|
|
if (!($node instanceof Twig_Node_Expression_Constant || $node instanceof Twig_Node_Expression_Array
|
|
|| $node instanceof Twig_Node_Expression_Unary_Neg || $node instanceof Twig_Node_Expression_Unary_Pos
|
|
)) {
|
|
return false;
|
|
}
|
|
|
|
foreach ($node as $n) {
|
|
if (!$this->checkConstantExpression($n)) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
}
|
|
|
|
class_alias('Twig_ExpressionParser', 'Twig\ExpressionParser', false);
|
|
|