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Upgrade Twig library

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This commit is contained in:
Michael Foster 2013-08-01 15:20:12 -04:00
parent 22f3a95e0e
commit 0fe5528574
133 changed files with 5080 additions and 1386 deletions
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304
inc/lib/Twig/ExpressionParser.php
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@ -18,8 +18,7 @@
* @see http://www.engr.mun.ca/~theo/Misc/exp_parsing.htm
* @see http://en.wikipedia.org/wiki/Operator-precedence_parser
*
* @package twig
* @author Fabien Potencier <fabien@symfony.com>
* @author Fabien Potencier <fabien@symfony.com>
*/
class Twig_ExpressionParser
{
@ -89,9 +88,19 @@ class Twig_ExpressionParser
{
while ($this->parser->getStream()->test(Twig_Token::PUNCTUATION_TYPE, '?')) {
$this->parser->getStream()->next();
$expr2 = $this->parseExpression();
$this->parser->getStream()->expect(Twig_Token::PUNCTUATION_TYPE, ':', 'The ternary operator must have a default value');
$expr3 = $this->parseExpression();
if (!$this->parser->getStream()->test(Twig_Token::PUNCTUATION_TYPE, ':')) {
$expr2 = $this->parseExpression();
if ($this->parser->getStream()->test(Twig_Token::PUNCTUATION_TYPE, ':')) {
$this->parser->getStream()->next();
$expr3 = $this->parseExpression();
} else {
$expr3 = new Twig_Node_Expression_Constant('', $this->parser->getCurrentToken()->getLine());
}
} else {
$this->parser->getStream()->next();
$expr2 = $expr;
$expr3 = $this->parseExpression();
}
$expr = new Twig_Node_Expression_Conditional($expr, $expr2, $expr3, $this->parser->getCurrentToken()->getLine());
}
@ -143,31 +152,67 @@ class Twig_ExpressionParser
break;
case Twig_Token::NUMBER_TYPE:
case Twig_Token::STRING_TYPE:
$this->parser->getStream()->next();
$node = new Twig_Node_Expression_Constant($token->getValue(), $token->getLine());
break;
case Twig_Token::STRING_TYPE:
case Twig_Token::INTERPOLATION_START_TYPE:
$node = $this->parseStringExpression();
break;
default:
if ($token->test(Twig_Token::PUNCTUATION_TYPE, '[')) {
$node = $this->parseArrayExpression();
} elseif ($token->test(Twig_Token::PUNCTUATION_TYPE, '{')) {
$node = $this->parseHashExpression();
} else {
throw new Twig_Error_Syntax(sprintf('Unexpected token "%s" of value "%s"', Twig_Token::typeToEnglish($token->getType(), $token->getLine()), $token->getValue()), $token->getLine());
throw new Twig_Error_Syntax(sprintf('Unexpected token "%s" of value "%s"', Twig_Token::typeToEnglish($token->getType(), $token->getLine()), $token->getValue()), $token->getLine(), $this->parser->getFilename());
}
}
return $this->parsePostfixExpression($node);
}
public function parseStringExpression()
{
$stream = $this->parser->getStream();
$nodes = array();
// a string cannot be followed by another string in a single expression
$nextCanBeString = true;
while (true) {
if ($stream->test(Twig_Token::STRING_TYPE) && $nextCanBeString) {
$token = $stream->next();
$nodes[] = new Twig_Node_Expression_Constant($token->getValue(), $token->getLine());
$nextCanBeString = false;
} elseif ($stream->test(Twig_Token::INTERPOLATION_START_TYPE)) {
$stream->next();
$nodes[] = $this->parseExpression();
$stream->expect(Twig_Token::INTERPOLATION_END_TYPE);
$nextCanBeString = true;
} else {
break;
}
}
$expr = array_shift($nodes);
foreach ($nodes as $node) {
$expr = new Twig_Node_Expression_Binary_Concat($expr, $node, $node->getLine());
}
return $expr;
}
public function parseArrayExpression()
{
$stream = $this->parser->getStream();
$stream->expect(Twig_Token::PUNCTUATION_TYPE, '[', 'An array element was expected');
$elements = array();
$node = new Twig_Node_Expression_Array(array(), $stream->getCurrent()->getLine());
$first = true;
while (!$stream->test(Twig_Token::PUNCTUATION_TYPE, ']')) {
if (!empty($elements)) {
if (!$first) {
$stream->expect(Twig_Token::PUNCTUATION_TYPE, ',', 'An array element must be followed by a comma');
// trailing ,?
@ -175,21 +220,24 @@ class Twig_ExpressionParser
break;
}
}
$first = false;
$elements[] = $this->parseExpression();
$node->addElement($this->parseExpression());
}
$stream->expect(Twig_Token::PUNCTUATION_TYPE, ']', 'An opened array is not properly closed');
return new Twig_Node_Expression_Array($elements, $stream->getCurrent()->getLine());
return $node;
}
public function parseHashExpression()
{
$stream = $this->parser->getStream();
$stream->expect(Twig_Token::PUNCTUATION_TYPE, '{', 'A hash element was expected');
$elements = array();
$node = new Twig_Node_Expression_Array(array(), $stream->getCurrent()->getLine());
$first = true;
while (!$stream->test(Twig_Token::PUNCTUATION_TYPE, '}')) {
if (!empty($elements)) {
if (!$first) {
$stream->expect(Twig_Token::PUNCTUATION_TYPE, ',', 'A hash value must be followed by a comma');
// trailing ,?
@ -197,19 +245,33 @@ class Twig_ExpressionParser
break;
}
}
$first = false;
if (!$stream->test(Twig_Token::STRING_TYPE) && !$stream->test(Twig_Token::NUMBER_TYPE)) {
// a hash key can be:
//
// * a number -- 12
// * a string -- 'a'
// * a name, which is equivalent to a string -- a
// * an expression, which must be enclosed in parentheses -- (1 + 2)
if ($stream->test(Twig_Token::STRING_TYPE) || $stream->test(Twig_Token::NAME_TYPE) || $stream->test(Twig_Token::NUMBER_TYPE)) {
$token = $stream->next();
$key = new Twig_Node_Expression_Constant($token->getValue(), $token->getLine());
} elseif ($stream->test(Twig_Token::PUNCTUATION_TYPE, '(')) {
$key = $this->parseExpression();
} else {
$current = $stream->getCurrent();
throw new Twig_Error_Syntax(sprintf('A hash key must be a quoted string or a number (unexpected token "%s" of value "%s"', Twig_Token::typeToEnglish($current->getType(), $current->getLine()), $current->getValue()), $current->getLine());
throw new Twig_Error_Syntax(sprintf('A hash key must be a quoted string, a number, a name, or an expression enclosed in parentheses (unexpected token "%s" of value "%s"', Twig_Token::typeToEnglish($current->getType(), $current->getLine()), $current->getValue()), $current->getLine(), $this->parser->getFilename());
}
$key = $stream->next()->getValue();
$stream->expect(Twig_Token::PUNCTUATION_TYPE, ':', 'A hash key must be followed by a colon (:)');
$elements[$key] = $this->parseExpression();
$value = $this->parseExpression();
$node->addElement($value, $key);
}
$stream->expect(Twig_Token::PUNCTUATION_TYPE, '}', 'An opened hash is not properly closed');
return new Twig_Node_Expression_Array($elements, $stream->getCurrent()->getLine());
return $node;
}
public function parsePostfixExpression($node)
@ -234,43 +296,56 @@ class Twig_ExpressionParser
public function getFunctionNode($name, $line)
{
$args = $this->parseArguments();
switch ($name) {
case 'parent':
$args = $this->parseArguments();
if (!count($this->parser->getBlockStack())) {
throw new Twig_Error_Syntax('Calling "parent" outside a block is forbidden', $line);
throw new Twig_Error_Syntax('Calling "parent" outside a block is forbidden', $line, $this->parser->getFilename());
}
if (!$this->parser->getParent()) {
throw new Twig_Error_Syntax('Calling "parent" on a template that does not extend another one is forbidden', $line);
if (!$this->parser->getParent() && !$this->parser->hasTraits()) {
throw new Twig_Error_Syntax('Calling "parent" on a template that does not extend nor "use" another template is forbidden', $line, $this->parser->getFilename());
}
return new Twig_Node_Expression_Parent($this->parser->peekBlockStack(), $line);
case 'block':
return new Twig_Node_Expression_BlockReference($args->getNode(0), false, $line);
return new Twig_Node_Expression_BlockReference($this->parseArguments()->getNode(0), false, $line);
case 'attribute':
$args = $this->parseArguments();
if (count($args) < 2) {
throw new Twig_Error_Syntax('The "attribute" function takes at least two arguments (the variable and the attribute)', $line);
throw new Twig_Error_Syntax('The "attribute" function takes at least two arguments (the variable and the attributes)', $line, $this->parser->getFilename());
}
return new Twig_Node_Expression_GetAttr($args->getNode(0), $args->getNode(1), count($args) > 2 ? $args->getNode(2) : new Twig_Node_Expression_Array(array(), $line), Twig_TemplateInterface::ANY_CALL, $line);
default:
if (null !== $alias = $this->parser->getImportedFunction($name)) {
return new Twig_Node_Expression_GetAttr($alias['node'], new Twig_Node_Expression_Constant($alias['name'], $line), $args, Twig_TemplateInterface::METHOD_CALL, $line);
if (null !== $alias = $this->parser->getImportedSymbol('function', $name)) {
$arguments = new Twig_Node_Expression_Array(array(), $line);
foreach ($this->parseArguments() as $n) {
$arguments->addElement($n);
}
$node = new Twig_Node_Expression_MethodCall($alias['node'], $alias['name'], $arguments, $line);
$node->setAttribute('safe', true);
return $node;
}
return new Twig_Node_Expression_Function($name, $args, $line);
$args = $this->parseArguments(true);
$class = $this->getFunctionNodeClass($name, $line);
return new $class($name, $args, $line);
}
}
public function parseSubscriptExpression($node)
{
$token = $this->parser->getStream()->next();
$stream = $this->parser->getStream();
$token = $stream->next();
$lineno = $token->getLine();
$arguments = new Twig_Node();
$arguments = new Twig_Node_Expression_Array(array(), $lineno);
$type = Twig_TemplateInterface::ANY_CALL;
if ($token->getValue() == '.') {
$token = $this->parser->getStream()->next();
$token = $stream->next();
if (
$token->getType() == Twig_Token::NAME_TYPE
||
@ -280,20 +355,60 @@ class Twig_ExpressionParser
) {
$arg = new Twig_Node_Expression_Constant($token->getValue(), $lineno);
if ($this->parser->getStream()->test(Twig_Token::PUNCTUATION_TYPE, '(')) {
if ($stream->test(Twig_Token::PUNCTUATION_TYPE, '(')) {
$type = Twig_TemplateInterface::METHOD_CALL;
$arguments = $this->parseArguments();
} else {
$arguments = new Twig_Node();
foreach ($this->parseArguments() as $n) {
$arguments->addElement($n);
}
}
} else {
throw new Twig_Error_Syntax('Expected name or number', $lineno);
throw new Twig_Error_Syntax('Expected name or number', $lineno, $this->parser->getFilename());
}
if ($node instanceof Twig_Node_Expression_Name && null !== $this->parser->getImportedSymbol('template', $node->getAttribute('name'))) {
if (!$arg instanceof Twig_Node_Expression_Constant) {
throw new Twig_Error_Syntax(sprintf('Dynamic macro names are not supported (called on "%s")', $node->getAttribute('name')), $token->getLine(), $this->parser->getFilename());
}
$node = new Twig_Node_Expression_MethodCall($node, 'get'.$arg->getAttribute('value'), $arguments, $lineno);
$node->setAttribute('safe', true);
return $node;
}
} else {
$type = Twig_TemplateInterface::ARRAY_CALL;
$arg = $this->parseExpression();
$this->parser->getStream()->expect(Twig_Token::PUNCTUATION_TYPE, ']');
// slice?
$slice = false;
if ($stream->test(Twig_Token::PUNCTUATION_TYPE, ':')) {
$slice = true;
$arg = new Twig_Node_Expression_Constant(0, $token->getLine());
} else {
$arg = $this->parseExpression();
}
if ($stream->test(Twig_Token::PUNCTUATION_TYPE, ':')) {
$slice = true;
$stream->next();
}
if ($slice) {
if ($stream->test(Twig_Token::PUNCTUATION_TYPE, ']')) {
$length = new Twig_Node_Expression_Constant(null, $token->getLine());
} else {
$length = $this->parseExpression();
}
$class = $this->getFilterNodeClass('slice', $token->getLine());
$arguments = new Twig_Node(array($arg, $length));
$filter = new $class($node, new Twig_Node_Expression_Constant('slice', $token->getLine()), $arguments, $token->getLine());
$stream->expect(Twig_Token::PUNCTUATION_TYPE, ']');
return $filter;
}
$stream->expect(Twig_Token::PUNCTUATION_TYPE, ']');
}
return new Twig_Node_Expression_GetAttr($node, $arg, $arguments, $type, $lineno);
@ -315,10 +430,12 @@ class Twig_ExpressionParser
if (!$this->parser->getStream()->test(Twig_Token::PUNCTUATION_TYPE, '(')) {
$arguments = new Twig_Node();
} else {
$arguments = $this->parseArguments();
$arguments = $this->parseArguments(true);
}
$node = new Twig_Node_Expression_Filter($node, $name, $arguments, $token->getLine(), $tag);
$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;
@ -330,17 +447,62 @@ class Twig_ExpressionParser
return $node;
}
public function parseArguments()
/**
* Parses arguments.
*
* @param Boolean $namedArguments Whether to allow named arguments or not
* @param Boolean $definition Whether we are parsing arguments for a function definition
*/
public function parseArguments($namedArguments = false, $definition = false)
{
$args = array();
$stream = $this->parser->getStream();
$stream->expect(Twig_Token::PUNCTUATION_TYPE, '(', 'A list of arguments must be opened by a parenthesis');
$stream->expect(Twig_Token::PUNCTUATION_TYPE, '(', 'A list of arguments must begin with an opening parenthesis');
while (!$stream->test(Twig_Token::PUNCTUATION_TYPE, ')')) {
if (!empty($args)) {
$stream->expect(Twig_Token::PUNCTUATION_TYPE, ',', 'Arguments must be separated by a comma');
}
$args[] = $this->parseExpression();
if ($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 && $stream->test(Twig_Token::OPERATOR_TYPE, '=')) {
$token = $stream->next();
if (!$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(), $this->parser->getFilename());
}
$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(), $this->parser->getFilename());
}
} 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');
@ -353,7 +515,7 @@ class Twig_ExpressionParser
while (true) {
$token = $this->parser->getStream()->expect(Twig_Token::NAME_TYPE, null, 'Only variables can be assigned to');
if (in_array($token->getValue(), array('true', 'false', 'none'))) {
throw new Twig_Error_Syntax(sprintf('You cannot assign a value to "%s"', $token->getValue()), $token->getLine());
throw new Twig_Error_Syntax(sprintf('You cannot assign a value to "%s"', $token->getValue()), $token->getLine(), $this->parser->getFilename());
}
$targets[] = new Twig_Node_Expression_AssignName($token->getValue(), $token->getLine());
@ -379,4 +541,60 @@ class Twig_ExpressionParser
return new Twig_Node($targets);
}
protected function getFunctionNodeClass($name, $line)
{
$env = $this->parser->getEnvironment();
if (false === $function = $env->getFunction($name)) {
$message = sprintf('The function "%s" does not exist', $name);
if ($alternatives = $env->computeAlternatives($name, array_keys($env->getFunctions()))) {
$message = sprintf('%s. Did you mean "%s"', $message, implode('", "', $alternatives));
}
throw new Twig_Error_Syntax($message, $line, $this->parser->getFilename());
}
if ($function instanceof Twig_SimpleFunction) {
return $function->getNodeClass();
}
return $function instanceof Twig_Function_Node ? $function->getClass() : 'Twig_Node_Expression_Function';
}
protected function getFilterNodeClass($name, $line)
{
$env = $this->parser->getEnvironment();
if (false === $filter = $env->getFilter($name)) {
$message = sprintf('The filter "%s" does not exist', $name);
if ($alternatives = $env->computeAlternatives($name, array_keys($env->getFilters()))) {
$message = sprintf('%s. Did you mean "%s"', $message, implode('", "', $alternatives));
}
throw new Twig_Error_Syntax($message, $line, $this->parser->getFilename());
}
if ($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 || $node instanceof Twig_Node_Expression_Array)) {
return false;
}
foreach ($node as $n) {
if (!$this->checkConstantExpression($n)) {
return false;
}
}
return true;
}
}