public function Twig_Node_For::compile

Compiles the node to PHP.

Parameters

Twig_Compiler A Twig_Compiler instance:

Overrides Twig_Node::compile

File

drupal/core/vendor/twig/twig/lib/Twig/Node/For.php, line 38

Class

Twig_Node_For

Represents a for node.

Code

public function compile(Twig_Compiler $compiler) {
  $compiler
    ->addDebugInfo($this)
    ->write("\$context['_parent'] = (array) \$context;\n")
    ->write("\$context['_seq'] = twig_ensure_traversable(")
    ->subcompile($this
    ->getNode('seq'))
    ->raw(");\n");
  if (null !== $this
    ->getNode('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', null !== $this
    ->getNode('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 (null !== $this
    ->getNode('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_merge(\$_parent, array_intersect_key(\$context, \$_parent));\n");
}