class Sass::Tree::Visitors::Base

@abstract
for dealing with the return value of ‘@else` nodes.
In particular, there is no built-in scaffolding
special care must be taken to ensure that it is properly handled.
Note: due to the unusual nature of {Sass::Tree::IfNode},
They may `yield` to visit the child nodes of the current node.
These methods take the node in question as argument.
(e.g. `visit_rule` for {RuleNode} or `visit_for` for {ForNode}).
then implement `visit_*` methods for each node they care about
Visitors should extend this class,
The abstract base class for Sass visitors.

def self.node_name(node)

Returns:
  • (String) - The name.

Parameters:
  • node (Tree::Node) -- The node. 
def self.node_name(node)
  Sass::Util.deprecated(self, "Call node.class.node_name instead.")
  node.class.node_name
end

def self.visit(root)

Returns:
  • (Object) - The return value of \{#visit} for the root node.

Parameters:
  • root (Tree::Node) -- The root node of the Sass tree. 
def self.visit(root)
  new.send(:visit, root)
end

def visit(node)

Returns:
  • (Object) - The return value of the `visit_*` method for this node.

Parameters:
  • node (Tree::Node) -- The node to visit. 
def visit(node)
  if respond_to?(node.class.visit_method, true)
    send(node.class.visit_method, node) {visit_children(node)}
  else
    visit_children(node)
  end
end

def visit_children(parent)

Returns:
  • (Array) - The return values of the `visit_*` methods for the children.
    Parameters:
    • parent (Tree::Node) -- The parent node of the children to visit. 
    def visit_children(parent)
  parent.children.map {|c| visit(c)}
end

    def visit_if(node)

    This exists to ensure that the contents of the `@else` clause get visited.
    `yield`s, then runs the visitor on the `@else` clause if the node has one. 
    def visit_if(node)
  yield
  visit(node.else) if node.else
  node
end