responsive-menu / vendor / twig / twig / lib / Twig / ExpressionParser.php

ExpressionParser.php in Responsive Menu – Create Mobile-Friendly Menu 3.1.12, at vendor/twig/twig/lib/Twig/ExpressionParser.php

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1	<?php
2
3	/*
4	* This file is part of Twig.
5	*
6	* (c) Fabien Potencier
7	* (c) Armin Ronacher
8	*
9	* For the full copyright and license information, please view the LICENSE
10	* file that was distributed with this source code.
11	*/
12
13	/**
14	* Parses expressions.
15	*
16	* This parser implements a "Precedence climbing" algorithm.
17	*
18	* @see http://www.engr.mun.ca/~theo/Misc/exp_parsing.htm
19	* @see http://en.wikipedia.org/wiki/Operator-precedence_parser
20	*
21	* @author Fabien Potencier <fabien@symfony.com>
22	*
23	* @internal
24	*/
25	class Twig_ExpressionParser
26	{
27	const OPERATOR_LEFT = 1;
28	const OPERATOR_RIGHT = 2;
29
30	protected $parser;
31	protected $unaryOperators;
32	protected $binaryOperators;
33
34	private $env;
35
36	public function __construct(Twig_Parser $parser, $env = null)
37	{
38	$this->parser = $parser;
39
40	if ($env instanceof Twig_Environment) {
41	$this->env = $env;
42	$this->unaryOperators = $env->getUnaryOperators();
43	$this->binaryOperators = $env->getBinaryOperators();
44	} else {
45	@trigger_error('Passing the operators as constructor arguments to '.__METHOD__.' is deprecated since version 1.27. Pass the environment instead.', E_USER_DEPRECATED);
46
47	$this->env = $parser->getEnvironment();
48	$this->unaryOperators = func_get_arg(1);
49	$this->binaryOperators = func_get_arg(2);
50	}
51	}
52
53	public function parseExpression($precedence = 0)
54	{
55	$expr = $this->getPrimary();
56	$token = $this->parser->getCurrentToken();
57	while ($this->isBinary($token) && $this->binaryOperators[$token->getValue()]['precedence'] >= $precedence) {
58	$op = $this->binaryOperators[$token->getValue()];
59	$this->parser->getStream()->next();
60
61	if ('is not' === $token->getValue()) {
62	$expr = $this->parseNotTestExpression($expr);
63	} elseif ('is' === $token->getValue()) {
64	$expr = $this->parseTestExpression($expr);
65	} elseif (isset($op['callable'])) {
66	$expr = call_user_func($op['callable'], $this->parser, $expr);
67	} else {
68	$expr1 = $this->parseExpression(self::OPERATOR_LEFT === $op['associativity'] ? $op['precedence'] + 1 : $op['precedence']);
69	$class = $op['class'];
70	$expr = new $class($expr, $expr1, $token->getLine());
71	}
72
73	$token = $this->parser->getCurrentToken();
74	}
75
76	if (0 === $precedence) {
77	return $this->parseConditionalExpression($expr);
78	}
79
80	return $expr;
81	}
82
83	protected function getPrimary()
84	{
85	$token = $this->parser->getCurrentToken();
86
87	if ($this->isUnary($token)) {
88	$operator = $this->unaryOperators[$token->getValue()];
89	$this->parser->getStream()->next();
90	$expr = $this->parseExpression($operator['precedence']);
91	$class = $operator['class'];
92
93	return $this->parsePostfixExpression(new $class($expr, $token->getLine()));
94	} elseif ($token->test(Twig_Token::PUNCTUATION_TYPE, '(')) {
95	$this->parser->getStream()->next();
96	$expr = $this->parseExpression();
97	$this->parser->getStream()->expect(Twig_Token::PUNCTUATION_TYPE, ')', 'An opened parenthesis is not properly closed');
98
99	return $this->parsePostfixExpression($expr);
100	}
101
102	return $this->parsePrimaryExpression();
103	}
104
105	protected function parseConditionalExpression($expr)
106	{
107	while ($this->parser->getStream()->nextIf(Twig_Token::PUNCTUATION_TYPE, '?')) {
108	if (!$this->parser->getStream()->nextIf(Twig_Token::PUNCTUATION_TYPE, ':')) {
109	$expr2 = $this->parseExpression();
110	if ($this->parser->getStream()->nextIf(Twig_Token::PUNCTUATION_TYPE, ':')) {
111	$expr3 = $this->parseExpression();
112	} else {
113	$expr3 = new Twig_Node_Expression_Constant('', $this->parser->getCurrentToken()->getLine());
114	}
115	} else {
116	$expr2 = $expr;
117	$expr3 = $this->parseExpression();
118	}
119
120	$expr = new Twig_Node_Expression_Conditional($expr, $expr2, $expr3, $this->parser->getCurrentToken()->getLine());
121	}
122
123	return $expr;
124	}
125
126	protected function isUnary(Twig_Token $token)
127	{
128	return $token->test(Twig_Token::OPERATOR_TYPE) && isset($this->unaryOperators[$token->getValue()]);
129	}
130
131	protected function isBinary(Twig_Token $token)
132	{
133	return $token->test(Twig_Token::OPERATOR_TYPE) && isset($this->binaryOperators[$token->getValue()]);
134	}
135
136	public function parsePrimaryExpression()
137	{
138	$token = $this->parser->getCurrentToken();
139	switch ($token->getType()) {
140	case Twig_Token::NAME_TYPE:
141	$this->parser->getStream()->next();
142	switch ($token->getValue()) {
143	case 'true':
144	case 'TRUE':
145	$node = new Twig_Node_Expression_Constant(true, $token->getLine());
146	break;
147
148	case 'false':
149	case 'FALSE':
150	$node = new Twig_Node_Expression_Constant(false, $token->getLine());
151	break;
152
153	case 'none':
154	case 'NONE':
155	case 'null':
156	case 'NULL':
157	$node = new Twig_Node_Expression_Constant(null, $token->getLine());
158	break;
159
160	default:
161	if ('(' === $this->parser->getCurrentToken()->getValue()) {
162	$node = $this->getFunctionNode($token->getValue(), $token->getLine());
163	} else {
164	$node = new Twig_Node_Expression_Name($token->getValue(), $token->getLine());
165	}
166	}
167	break;
168
169	case Twig_Token::NUMBER_TYPE:
170	$this->parser->getStream()->next();
171	$node = new Twig_Node_Expression_Constant($token->getValue(), $token->getLine());
172	break;
173
174	case Twig_Token::STRING_TYPE:
175	case Twig_Token::INTERPOLATION_START_TYPE:
176	$node = $this->parseStringExpression();
177	break;
178
179	case Twig_Token::OPERATOR_TYPE:
180	if (preg_match(Twig_Lexer::REGEX_NAME, $token->getValue(), $matches) && $matches[0] == $token->getValue()) {
181	// in this context, string operators are variable names
182	$this->parser->getStream()->next();
183	$node = new Twig_Node_Expression_Name($token->getValue(), $token->getLine());
184	break;
185	} elseif (isset($this->unaryOperators[$token->getValue()])) {
186	$class = $this->unaryOperators[$token->getValue()]['class'];
187
188	$ref = new ReflectionClass($class);
189	$negClass = 'Twig_Node_Expression_Unary_Neg';
190	$posClass = 'Twig_Node_Expression_Unary_Pos';
191	if (!(in_array($ref->getName(), array($negClass, $posClass)) \|\| $ref->isSubclassOf($negClass) \|\| $ref->isSubclassOf($posClass))) {
192	throw new Twig_Error_Syntax(sprintf('Unexpected unary operator "%s".', $token->getValue()), $token->getLine(), $this->parser->getStream()->getSourceContext());
193	}
194
195	$this->parser->getStream()->next();
196	$expr = $this->parsePrimaryExpression();
197
198	$node = new $class($expr, $token->getLine());
199	break;
200	}
201
202	default:
203	if ($token->test(Twig_Token::PUNCTUATION_TYPE, '[')) {
204	$node = $this->parseArrayExpression();
205	} elseif ($token->test(Twig_Token::PUNCTUATION_TYPE, '{')) {
206	$node = $this->parseHashExpression();
207	} else {
208	throw new Twig_Error_Syntax(sprintf('Unexpected token "%s" of value "%s".', Twig_Token::typeToEnglish($token->getType()), $token->getValue()), $token->getLine(), $this->parser->getStream()->getSourceContext());
209	}
210	}
211
212	return $this->parsePostfixExpression($node);
213	}
214
215	public function parseStringExpression()
216	{
217	$stream = $this->parser->getStream();
218
219	$nodes = array();
220	// a string cannot be followed by another string in a single expression
221	$nextCanBeString = true;
222	while (true) {
223	if ($nextCanBeString && $token = $stream->nextIf(Twig_Token::STRING_TYPE)) {
224	$nodes[] = new Twig_Node_Expression_Constant($token->getValue(), $token->getLine());
225	$nextCanBeString = false;
226	} elseif ($stream->nextIf(Twig_Token::INTERPOLATION_START_TYPE)) {
227	$nodes[] = $this->parseExpression();
228	$stream->expect(Twig_Token::INTERPOLATION_END_TYPE);
229	$nextCanBeString = true;
230	} else {
231	break;
232	}
233	}
234
235	$expr = array_shift($nodes);
236	foreach ($nodes as $node) {
237	$expr = new Twig_Node_Expression_Binary_Concat($expr, $node, $node->getTemplateLine());
238	}
239
240	return $expr;
241	}
242
243	public function parseArrayExpression()
244	{
245	$stream = $this->parser->getStream();
246	$stream->expect(Twig_Token::PUNCTUATION_TYPE, '[', 'An array element was expected');
247
248	$node = new Twig_Node_Expression_Array(array(), $stream->getCurrent()->getLine());
249	$first = true;
250	while (!$stream->test(Twig_Token::PUNCTUATION_TYPE, ']')) {
251	if (!$first) {
252	$stream->expect(Twig_Token::PUNCTUATION_TYPE, ',', 'An array element must be followed by a comma');
253
254	// trailing ,?
255	if ($stream->test(Twig_Token::PUNCTUATION_TYPE, ']')) {
256	break;
257	}
258	}
259	$first = false;
260
261	$node->addElement($this->parseExpression());
262	}
263	$stream->expect(Twig_Token::PUNCTUATION_TYPE, ']', 'An opened array is not properly closed');
264
265	return $node;
266	}
267
268	public function parseHashExpression()
269	{
270	$stream = $this->parser->getStream();
271	$stream->expect(Twig_Token::PUNCTUATION_TYPE, '{', 'A hash element was expected');
272
273	$node = new Twig_Node_Expression_Array(array(), $stream->getCurrent()->getLine());
274	$first = true;
275	while (!$stream->test(Twig_Token::PUNCTUATION_TYPE, '}')) {
276	if (!$first) {
277	$stream->expect(Twig_Token::PUNCTUATION_TYPE, ',', 'A hash value must be followed by a comma');
278
279	// trailing ,?
280	if ($stream->test(Twig_Token::PUNCTUATION_TYPE, '}')) {
281	break;
282	}
283	}
284	$first = false;
285
286	// a hash key can be:
287	//
288	// * a number -- 12
289	// * a string -- 'a'
290	// * a name, which is equivalent to a string -- a
291	// * an expression, which must be enclosed in parentheses -- (1 + 2)
292	if (($token = $stream->nextIf(Twig_Token::STRING_TYPE)) \|\| ($token = $stream->nextIf(Twig_Token::NAME_TYPE)) \|\| $token = $stream->nextIf(Twig_Token::NUMBER_TYPE)) {
293	$key = new Twig_Node_Expression_Constant($token->getValue(), $token->getLine());
294	} elseif ($stream->test(Twig_Token::PUNCTUATION_TYPE, '(')) {
295	$key = $this->parseExpression();
296	} else {
297	$current = $stream->getCurrent();
298
299	throw new Twig_Error_Syntax(sprintf('A hash key must be a quoted string, a number, a name, or an expression enclosed in parentheses (unexpected token "%s" of value "%s".', Twig_Token::typeToEnglish($current->getType()), $current->getValue()), $current->getLine(), $stream->getSourceContext());
300	}
301
302	$stream->expect(Twig_Token::PUNCTUATION_TYPE, ':', 'A hash key must be followed by a colon (:)');
303	$value = $this->parseExpression();
304
305	$node->addElement($value, $key);
306	}
307	$stream->expect(Twig_Token::PUNCTUATION_TYPE, '}', 'An opened hash is not properly closed');
308
309	return $node;
310	}
311
312	public function parsePostfixExpression($node)
313	{
314	while (true) {
315	$token = $this->parser->getCurrentToken();
316	if ($token->getType() == Twig_Token::PUNCTUATION_TYPE) {
317	if ('.' == $token->getValue() \|\| '[' == $token->getValue()) {
318	$node = $this->parseSubscriptExpression($node);
319	} elseif ('\|' == $token->getValue()) {
320	$node = $this->parseFilterExpression($node);
321	} else {
322	break;
323	}
324	} else {
325	break;
326	}
327	}
328
329	return $node;
330	}
331
332	public function getFunctionNode($name, $line)
333	{
334	switch ($name) {
335	case 'parent':
336	$this->parseArguments();
337	if (!count($this->parser->getBlockStack())) {
338	throw new Twig_Error_Syntax('Calling "parent" outside a block is forbidden.', $line, $this->parser->getStream()->getSourceContext());
339	}
340
341	if (!$this->parser->getParent() && !$this->parser->hasTraits()) {
342	throw new Twig_Error_Syntax('Calling "parent" on a template that does not extend nor "use" another template is forbidden.', $line, $this->parser->getStream()->getSourceContext());
343	}
344
345	return new Twig_Node_Expression_Parent($this->parser->peekBlockStack(), $line);
346	case 'block':
347	$args = $this->parseArguments();
348	if (count($args) < 1) {
349	throw new Twig_Error_Syntax('The "block" function takes one argument (the block name).', $line, $this->parser->getStream()->getSourceContext());
350	}
351
352	return new Twig_Node_Expression_BlockReference($args->getNode(0), count($args) > 1 ? $args->getNode(1) : null, $line);
353	case 'attribute':
354	$args = $this->parseArguments();
355	if (count($args) < 2) {
356	throw new Twig_Error_Syntax('The "attribute" function takes at least two arguments (the variable and the attributes).', $line, $this->parser->getStream()->getSourceContext());
357	}
358
359	return new Twig_Node_Expression_GetAttr($args->getNode(0), $args->getNode(1), count($args) > 2 ? $args->getNode(2) : null, Twig_Template::ANY_CALL, $line);
360	default:
361	if (null !== $alias = $this->parser->getImportedSymbol('function', $name)) {
362	$arguments = new Twig_Node_Expression_Array(array(), $line);
363	foreach ($this->parseArguments() as $n) {
364	$arguments->addElement($n);
365	}
366
367	$node = new Twig_Node_Expression_MethodCall($alias['node'], $alias['name'], $arguments, $line);
368	$node->setAttribute('safe', true);
369
370	return $node;
371	}
372
373	$args = $this->parseArguments(true);
374	$class = $this->getFunctionNodeClass($name, $line);
375
376	return new $class($name, $args, $line);
377	}
378	}
379
380	public function parseSubscriptExpression($node)
381	{
382	$stream = $this->parser->getStream();
383	$token = $stream->next();
384	$lineno = $token->getLine();
385	$arguments = new Twig_Node_Expression_Array(array(), $lineno);
386	$type = Twig_Template::ANY_CALL;
387	if ($token->getValue() == '.') {
388	$token = $stream->next();
389	if (
390	$token->getType() == Twig_Token::NAME_TYPE
391	\|\|
392	$token->getType() == Twig_Token::NUMBER_TYPE
393	\|\|
394	($token->getType() == Twig_Token::OPERATOR_TYPE && preg_match(Twig_Lexer::REGEX_NAME, $token->getValue()))
395	) {
396	$arg = new Twig_Node_Expression_Constant($token->getValue(), $lineno);
397
398	if ($stream->test(Twig_Token::PUNCTUATION_TYPE, '(')) {
399	$type = Twig_Template::METHOD_CALL;
400	foreach ($this->parseArguments() as $n) {
401	$arguments->addElement($n);
402	}
403	}
404	} else {
405	throw new Twig_Error_Syntax('Expected name or number.', $lineno, $stream->getSourceContext());
406	}
407
408	if ($node instanceof Twig_Node_Expression_Name && null !== $this->parser->getImportedSymbol('template', $node->getAttribute('name'))) {
409	if (!$arg instanceof Twig_Node_Expression_Constant) {
410	throw new Twig_Error_Syntax(sprintf('Dynamic macro names are not supported (called on "%s").', $node->getAttribute('name')), $token->getLine(), $stream->getSourceContext());
411	}
412
413	$name = $arg->getAttribute('value');
414
415	if ($this->parser->isReservedMacroName($name)) {
416	throw new Twig_Error_Syntax(sprintf('"%s" cannot be called as macro as it is a reserved keyword.', $name), $token->getLine(), $stream->getSourceContext());
417	}
418
419	$node = new Twig_Node_Expression_MethodCall($node, 'get'.$name, $arguments, $lineno);
420	$node->setAttribute('safe', true);
421
422	return $node;
423	}
424	} else {
425	$type = Twig_Template::ARRAY_CALL;
426
427	// slice?
428	$slice = false;
429	if ($stream->test(Twig_Token::PUNCTUATION_TYPE, ':')) {
430	$slice = true;
431	$arg = new Twig_Node_Expression_Constant(0, $token->getLine());
432	} else {
433	$arg = $this->parseExpression();
434	}
435
436	if ($stream->nextIf(Twig_Token::PUNCTUATION_TYPE, ':')) {
437	$slice = true;
438	}
439
440	if ($slice) {
441	if ($stream->test(Twig_Token::PUNCTUATION_TYPE, ']')) {
442	$length = new Twig_Node_Expression_Constant(null, $token->getLine());
443	} else {
444	$length = $this->parseExpression();
445	}
446
447	$class = $this->getFilterNodeClass('slice', $token->getLine());
448	$arguments = new Twig_Node(array($arg, $length));
449	$filter = new $class($node, new Twig_Node_Expression_Constant('slice', $token->getLine()), $arguments, $token->getLine());
450
451	$stream->expect(Twig_Token::PUNCTUATION_TYPE, ']');
452
453	return $filter;
454	}
455
456	$stream->expect(Twig_Token::PUNCTUATION_TYPE, ']');
457	}
458
459	return new Twig_Node_Expression_GetAttr($node, $arg, $arguments, $type, $lineno);
460	}
461
462	public function parseFilterExpression($node)
463	{
464	$this->parser->getStream()->next();
465
466	return $this->parseFilterExpressionRaw($node);
467	}
468
469	public function parseFilterExpressionRaw($node, $tag = null)
470	{
471	while (true) {
472	$token = $this->parser->getStream()->expect(Twig_Token::NAME_TYPE);
473
474	$name = new Twig_Node_Expression_Constant($token->getValue(), $token->getLine());
475	if (!$this->parser->getStream()->test(Twig_Token::PUNCTUATION_TYPE, '(')) {
476	$arguments = new Twig_Node();
477	} else {
478	$arguments = $this->parseArguments(true);
479	}
480
481	$class = $this->getFilterNodeClass($name->getAttribute('value'), $token->getLine());
482
483	$node = new $class($node, $name, $arguments, $token->getLine(), $tag);
484
485	if (!$this->parser->getStream()->test(Twig_Token::PUNCTUATION_TYPE, '\|')) {
486	break;
487	}
488
489	$this->parser->getStream()->next();
490	}
491
492	return $node;
493	}
494
495	/**
496	* Parses arguments.
497	*
498	* @param bool $namedArguments Whether to allow named arguments or not
499	* @param bool $definition Whether we are parsing arguments for a function definition
500	*
501	* @return Twig_Node
502	*
503	* @throws Twig_Error_Syntax
504	*/
505	public function parseArguments($namedArguments = false, $definition = false)
506	{
507	$args = array();
508	$stream = $this->parser->getStream();
509
510	$stream->expect(Twig_Token::PUNCTUATION_TYPE, '(', 'A list of arguments must begin with an opening parenthesis');
511	while (!$stream->test(Twig_Token::PUNCTUATION_TYPE, ')')) {
512	if (!empty($args)) {
513	$stream->expect(Twig_Token::PUNCTUATION_TYPE, ',', 'Arguments must be separated by a comma');
514	}
515
516	if ($definition) {
517	$token = $stream->expect(Twig_Token::NAME_TYPE, null, 'An argument must be a name');
518	$value = new Twig_Node_Expression_Name($token->getValue(), $this->parser->getCurrentToken()->getLine());
519	} else {
520	$value = $this->parseExpression();
521	}
522
523	$name = null;
524	if ($namedArguments && $token = $stream->nextIf(Twig_Token::OPERATOR_TYPE, '=')) {
525	if (!$value instanceof Twig_Node_Expression_Name) {
526	throw new Twig_Error_Syntax(sprintf('A parameter name must be a string, "%s" given.', get_class($value)), $token->getLine(), $stream->getSourceContext());
527	}
528	$name = $value->getAttribute('name');
529
530	if ($definition) {
531	$value = $this->parsePrimaryExpression();
532
533	if (!$this->checkConstantExpression($value)) {
534	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());
535	}
536	} else {
537	$value = $this->parseExpression();
538	}
539	}
540
541	if ($definition) {
542	if (null === $name) {
543	$name = $value->getAttribute('name');
544	$value = new Twig_Node_Expression_Constant(null, $this->parser->getCurrentToken()->getLine());
545	}
546	$args[$name] = $value;
547	} else {
548	if (null === $name) {
549	$args[] = $value;
550	} else {
551	$args[$name] = $value;
552	}
553	}
554	}
555	$stream->expect(Twig_Token::PUNCTUATION_TYPE, ')', 'A list of arguments must be closed by a parenthesis');
556
557	return new Twig_Node($args);
558	}
559
560	public function parseAssignmentExpression()
561	{
562	$stream = $this->parser->getStream();
563	$targets = array();
564	while (true) {
565	$token = $stream->expect(Twig_Token::NAME_TYPE, null, 'Only variables can be assigned to');
566	$value = $token->getValue();
567	if (in_array(strtolower($value), array('true', 'false', 'none', 'null'))) {
568	throw new Twig_Error_Syntax(sprintf('You cannot assign a value to "%s".', $value), $token->getLine(), $stream->getSourceContext());
569	}
570	$targets[] = new Twig_Node_Expression_AssignName($value, $token->getLine());
571
572	if (!$stream->nextIf(Twig_Token::PUNCTUATION_TYPE, ',')) {
573	break;
574	}
575	}
576
577	return new Twig_Node($targets);
578	}
579
580	public function parseMultitargetExpression()
581	{
582	$targets = array();
583	while (true) {
584	$targets[] = $this->parseExpression();
585	if (!$this->parser->getStream()->nextIf(Twig_Token::PUNCTUATION_TYPE, ',')) {
586	break;
587	}
588	}
589
590	return new Twig_Node($targets);
591	}
592
593	private function parseNotTestExpression(Twig_NodeInterface $node)
594	{
595	return new Twig_Node_Expression_Unary_Not($this->parseTestExpression($node), $this->parser->getCurrentToken()->getLine());
596	}
597
598	private function parseTestExpression(Twig_NodeInterface $node)
599	{
600	$stream = $this->parser->getStream();
601	list($name, $test) = $this->getTest($node->getTemplateLine());
602
603	$class = $this->getTestNodeClass($test);
604	$arguments = null;
605	if ($stream->test(Twig_Token::PUNCTUATION_TYPE, '(')) {
606	$arguments = $this->parser->getExpressionParser()->parseArguments(true);
607	}
608
609	return new $class($node, $name, $arguments, $this->parser->getCurrentToken()->getLine());
610	}
611
612	private function getTest($line)
613	{
614	$stream = $this->parser->getStream();
615	$name = $stream->expect(Twig_Token::NAME_TYPE)->getValue();
616
617	if ($test = $this->env->getTest($name)) {
618	return array($name, $test);
619	}
620
621	if ($stream->test(Twig_Token::NAME_TYPE)) {
622	// try 2-words tests
623	$name = $name.' '.$this->parser->getCurrentToken()->getValue();
624
625	if ($test = $this->env->getTest($name)) {
626	$stream->next();
627
628	return array($name, $test);
629	}
630	}
631
632	$e = new Twig_Error_Syntax(sprintf('Unknown "%s" test.', $name), $line, $stream->getSourceContext());
633	$e->addSuggestions($name, array_keys($this->env->getTests()));
634
635	throw $e;
636	}
637
638	private function getTestNodeClass($test)
639	{
640	if ($test instanceof Twig_SimpleTest && $test->isDeprecated()) {
641	$stream = $this->parser->getStream();
642	$message = sprintf('Twig Test "%s" is deprecated', $test->getName());
643	if (!is_bool($test->getDeprecatedVersion())) {
644	$message .= sprintf(' since version %s', $test->getDeprecatedVersion());
645	}
646	if ($test->getAlternative()) {
647	$message .= sprintf('. Use "%s" instead', $test->getAlternative());
648	}
649	$src = $stream->getSourceContext();
650	$message .= sprintf(' in %s at line %d.', $src->getPath() ? $src->getPath() : $src->getName(), $stream->getCurrent()->getLine());
651
652	@trigger_error($message, E_USER_DEPRECATED);
653	}
654
655	if ($test instanceof Twig_SimpleTest) {
656	return $test->getNodeClass();
657	}
658
659	return $test instanceof Twig_Test_Node ? $test->getClass() : 'Twig_Node_Expression_Test';
660	}
661
662	protected function getFunctionNodeClass($name, $line)
663	{
664	if (false === $function = $this->env->getFunction($name)) {
665	$e = new Twig_Error_Syntax(sprintf('Unknown "%s" function.', $name), $line, $this->parser->getStream()->getSourceContext());
666	$e->addSuggestions($name, array_keys($this->env->getFunctions()));
667
668	throw $e;
669	}
670
671	if ($function instanceof Twig_SimpleFunction && $function->isDeprecated()) {
672	$message = sprintf('Twig Function "%s" is deprecated', $function->getName());
673	if (!is_bool($function->getDeprecatedVersion())) {
674	$message .= sprintf(' since version %s', $function->getDeprecatedVersion());
675	}
676	if ($function->getAlternative()) {
677	$message .= sprintf('. Use "%s" instead', $function->getAlternative());
678	}
679	$src = $this->parser->getStream()->getSourceContext();
680	$message .= sprintf(' in %s at line %d.', $src->getPath() ? $src->getPath() : $src->getName(), $line);
681
682	@trigger_error($message, E_USER_DEPRECATED);
683	}
684
685	if ($function instanceof Twig_SimpleFunction) {
686	return $function->getNodeClass();
687	}
688
689	return $function instanceof Twig_Function_Node ? $function->getClass() : 'Twig_Node_Expression_Function';
690	}
691
692	protected function getFilterNodeClass($name, $line)
693	{
694	if (false === $filter = $this->env->getFilter($name)) {
695	$e = new Twig_Error_Syntax(sprintf('Unknown "%s" filter.', $name), $line, $this->parser->getStream()->getSourceContext());
696	$e->addSuggestions($name, array_keys($this->env->getFilters()));
697
698	throw $e;
699	}
700
701	if ($filter instanceof Twig_SimpleFilter && $filter->isDeprecated()) {
702	$message = sprintf('Twig Filter "%s" is deprecated', $filter->getName());
703	if (!is_bool($filter->getDeprecatedVersion())) {
704	$message .= sprintf(' since version %s', $filter->getDeprecatedVersion());
705	}
706	if ($filter->getAlternative()) {
707	$message .= sprintf('. Use "%s" instead', $filter->getAlternative());
708	}
709	$src = $this->parser->getStream()->getSourceContext();
710	$message .= sprintf(' in %s at line %d.', $src->getPath() ? $src->getPath() : $src->getName(), $line);
711
712	@trigger_error($message, E_USER_DEPRECATED);
713	}
714
715	if ($filter instanceof Twig_SimpleFilter) {
716	return $filter->getNodeClass();
717	}
718
719	return $filter instanceof Twig_Filter_Node ? $filter->getClass() : 'Twig_Node_Expression_Filter';
720	}
721
722	// checks that the node only contains "constant" elements
723	protected function checkConstantExpression(Twig_NodeInterface $node)
724	{
725	if (!($node instanceof Twig_Node_Expression_Constant \|\| $node instanceof Twig_Node_Expression_Array
726	\|\| $node instanceof Twig_Node_Expression_Unary_Neg \|\| $node instanceof Twig_Node_Expression_Unary_Pos
727	)) {
728	return false;
729	}
730
731	foreach ($node as $n) {
732	if (!$this->checkConstantExpression($n)) {
733	return false;
734	}
735	}
736
737	return true;
738	}
739	}
740