Twig_Node_For Class Reference

Represents a for node. More...

Inheritance diagram for Twig_Node_For:

Collaboration diagram for Twig_Node_For:

Public Member Functions
	__construct (Twig_Node_Expression_AssignName $keyTarget, Twig_Node_Expression_AssignName $valueTarget, Twig_Node_Expression $seq, Twig_Node_Expression $ifexpr=null, Twig_NodeInterface $body, Twig_NodeInterface $else=null, $lineno, $tag=null)
	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 ()
	compile (Twig_Compiler $compiler)
	Compiles the node to PHP. More...
	getLine ()
	getNodeTag ()

Protected Attributes
	$loop
Protected Attributes inherited from Twig_Node
	$nodes
	$attributes
	$lineno
	$tag

Detailed Description

Represents a for node.

Author

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

Definition at line 18 of file For.php.

Constructor & Destructor Documentation

__construct()

Twig_Node_For::__construct	(	Twig_Node_Expression_AssignName	$keyTarget,
		Twig_Node_Expression_AssignName	$valueTarget,
		Twig_Node_Expression	$seq,
		Twig_Node_Expression	$ifexpr = null,
		Twig_NodeInterface	$body,
		Twig_NodeInterface	$else = null,
			$lineno,
			$tag = null
	)

Definition at line 22 of file For.php.

    {
        $body = new Twig_Node(array($body, $this->loop = new Twig_Node_ForLoop($lineno, $tag)));
 
        if (null !== $ifexpr) {
            $body = new Twig_Node_If(new Twig_Node(array($ifexpr, $body)), null, $lineno, $tag);
        }
 
        $nodes = array('key_target' => $keyTarget, 'value_target' => $valueTarget, 'seq' => $seq, 'body' => $body);
        if (null !== $else) {
            $nodes['else'] = $else;
        }
 
        parent::__construct($nodes, array('with_loop' => true, 'ifexpr' => null !== $ifexpr), $lineno, $tag);
    }

References Twig_Node\$lineno, Twig_Node\$nodes, and Twig_Node\$tag.

Member Function Documentation

compile()

Twig_Node_For::compile

(

Twig_Compiler

$compiler

)

Compiles the node to PHP.

Reimplemented from Twig_Node.

Definition at line 38 of file For.php.

    {
        $compiler
            ->addDebugInfo($this)
            ->write("\$context['_parent'] = \$context;\n")
            ->write("\$context['_seq'] = twig_ensure_traversable(")
            ->subcompile($this->getNode('seq'))
            ->raw(");\n")
        ;
 
        if ($this->hasNode('else')) {
            $compiler->write("\$context['_iterated'] = false;\n");
        }
 
        if ($this->getAttribute('with_loop')) {
            $compiler
                ->write("\$context['loop'] = array(\n")
                ->write("  'parent' => \$context['_parent'],\n")
                ->write("  'index0' => 0,\n")
                ->write("  'index'  => 1,\n")
                ->write("  'first'  => true,\n")
                ->write(");\n")
            ;
 
            if (!$this->getAttribute('ifexpr')) {
                $compiler
                    ->write("if (is_array(\$context['_seq']) || (is_object(\$context['_seq']) && \$context['_seq'] instanceof Countable)) {\n")
                    ->indent()
                    ->write("\$length = count(\$context['_seq']);\n")
                    ->write("\$context['loop']['revindex0'] = \$length - 1;\n")
                    ->write("\$context['loop']['revindex'] = \$length;\n")
                    ->write("\$context['loop']['length'] = \$length;\n")
                    ->write("\$context['loop']['last'] = 1 === \$length;\n")
                    ->outdent()
                    ->write("}\n")
                ;
            }
        }
 
        $this->loop->setAttribute('else', $this->hasNode('else'));
        $this->loop->setAttribute('with_loop', $this->getAttribute('with_loop'));
        $this->loop->setAttribute('ifexpr', $this->getAttribute('ifexpr'));
 
        $compiler
            ->write("foreach (\$context['_seq'] as ")
            ->subcompile($this->getNode('key_target'))
            ->raw(' => ')
            ->subcompile($this->getNode('value_target'))
            ->raw(") {\n")
            ->indent()
            ->subcompile($this->getNode('body'))
            ->outdent()
            ->write("}\n")
        ;
 
        if ($this->hasNode('else')) {
            $compiler
                ->write("if (!\$context['_iterated']) {\n")
                ->indent()
                ->subcompile($this->getNode('else'))
                ->outdent()
                ->write("}\n")
            ;
        }
 
        $compiler->write("\$_parent = \$context['_parent'];\n");
 
        // remove some "private" loop variables (needed for nested loops)
        $compiler->write('unset($context[\'_seq\'], $context[\'_iterated\'], $context[\''.$this->getNode('key_target')->getAttribute('name').'\'], $context[\''.$this->getNode('value_target')->getAttribute('name').'\'], $context[\'_parent\'], $context[\'loop\']);'."\n");
 
        // keep the values set in the inner context for variables defined in the outer context
        $compiler->write("\$context = array_intersect_key(\$context, \$_parent) + \$_parent;\n");
    }

References $context, Twig_Compiler\addDebugInfo(), Twig_Node\getAttribute(), Twig_Node\getNode(), Twig_Node\hasNode(), and Twig_Compiler\write().

Here is the call graph for this function:

Field Documentation

$loop

Twig_Node_For::$loop

protected

Definition at line 20 of file For.php.

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

• libs/composer/vendor/twig/twig/lib/Twig/Node/For.php