Twig_Node_Expression_Test_Defined Class Reference

Checks if a variable is defined in the current context. More...

Inheritance diagram for Twig_Node_Expression_Test_Defined:

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Public Member Functions
	__construct (Twig_NodeInterface $node, $name, Twig_NodeInterface $arguments=null, $lineno)
	compile (Twig_Compiler $compiler)
	Compiles the node to PHP. More...
Public Member Functions inherited from Twig_Node_Expression_Test
	__construct (Twig_NodeInterface $node, $name, Twig_NodeInterface $arguments=null, $lineno)
	compile (Twig_Compiler $compiler)
	Compiles the node to PHP. More...
Public Member Functions inherited from Twig_Node
	__construct (array $nodes=array(), array $attributes=array(), $lineno=0, $tag=null)
	Constructor. More...
	__toString ()
	toXml ($asDom=false)
	compile (Twig_Compiler $compiler)
	Compiles the node to PHP. More...
	getTemplateLine ()
	getLine ()
	getNodeTag ()
	hasAttribute ($name)
	getAttribute ($name)
	setAttribute ($name, $value)
	removeAttribute ($name)
	hasNode ($name)
	getNode ($name)
	setNode ($name, $node=null)
	removeNode ($name)
	count ()
	getIterator ()
	setTemplateName ($name)
	getTemplateName ()
	setFilename ($name)
	getFilename ()

Protected Member Functions
	changeIgnoreStrictCheck (Twig_Node_Expression_GetAttr $node)
Protected Member Functions inherited from Twig_Node_Expression_Call
	compileCallable (Twig_Compiler $compiler)
	compileArguments (Twig_Compiler $compiler)
	getArguments ($callable, $arguments)
	normalizeName ($name)

Additional Inherited Members
Protected Attributes inherited from Twig_Node
	$nodes
	$attributes
	$lineno
	$tag

Detailed Description

Checks if a variable is defined in the current context.

{# defined works with variable names and variable attributes #}
{% if foo is defined %}
    {# ... #}
{% endif %}

Author

Fabien Potencier fabie.nosp@m.n@sy.nosp@m.mfony.nosp@m..com

Definition at line 24 of file Defined.php.

Constructor & Destructor Documentation

__construct()

Twig_Node_Expression_Test_Defined::__construct	(	Twig_NodeInterface	$node,
			$name,
		Twig_NodeInterface	$arguments = null,
			$lineno
	)

Definition at line 26 of file Defined.php.

References Twig_Node\$lineno, Twig_Node\$name, changeIgnoreStrictCheck(), and Twig_Node\getTemplateLine().

    {
        if ($node instanceof Twig_Node_Expression_Name) {
            $node->setAttribute('is_defined_test', true);
        } elseif ($node instanceof Twig_Node_Expression_GetAttr) {
            $node->setAttribute('is_defined_test', true);
            $this->changeIgnoreStrictCheck($node);
        } elseif ($node instanceof Twig_Node_Expression_BlockReference) {
            $node->setAttribute('is_defined_test', true);
        } elseif ($node instanceof Twig_Node_Expression_Function && 'constant' === $node->getAttribute('name')) {
            $node->setAttribute('is_defined_test', true);
        } elseif ($node instanceof Twig_Node_Expression_Constant || $node instanceof Twig_Node_Expression_Array) {
            $node = new Twig_Node_Expression_Constant(true, $node->getTemplateLine());
        } else {
            throw new Twig_Error_Syntax('The "defined" test only works with simple variables.', $this->getTemplateLine());
        }

        parent::__construct($node, $name, $arguments, $lineno);
    }

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Member Function Documentation

changeIgnoreStrictCheck()

Twig_Node_Expression_Test_Defined::changeIgnoreStrictCheck ( Twig_Node_Expression_GetAttr  $node )

protected

Definition at line 46 of file Defined.php.

References Twig_Node\getNode(), and Twig_Node\setAttribute().

Referenced by __construct().

    {
        $node->setAttribute('ignore_strict_check', true);

        if ($node->getNode('node') instanceof Twig_Node_Expression_GetAttr) {
            $this->changeIgnoreStrictCheck($node->getNode('node'));
        }
    }

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compile()

Twig_Node_Expression_Test_Defined::compile

(

Twig_Compiler

$compiler

)

Compiles the node to PHP.

Implements Twig_NodeInterface.

Definition at line 55 of file Defined.php.

References Twig_Node\getNode(), and Twig_Compiler\subcompile().

    {
        $compiler->subcompile($this->getNode('node'));
    }

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The documentation for this class was generated from the following file:

• libs/composer/vendor/twig/twig/lib/Twig/Node/Expression/Test/Defined.php