Class: SyntaxTree::ARef

Inherits:
Node
  • Object
show all
Defined in:
lib/syntax_tree/node.rb

Overview

ARef represents when you’re pulling a value out of a collection at a specific index. Put another way, it’s any time you’re calling the method #[].

collection[index]

The nodes usually contains two children, the collection and the index. In some cases, you don’t necessarily have the second child node, because you can call procs with a pretty esoteric syntax. In the following example, you wouldn’t have a second child node:

collection[]

Instance Attribute Summary collapse

Attributes inherited from Node

#location

Instance Method Summary collapse

Methods inherited from Node

#pretty_print, #to_json

Constructor Details

#initialize(collection:, index:, location:, comments: []) ⇒ ARef

Returns a new instance of ARef.



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# File 'lib/syntax_tree/node.rb', line 421

def initialize(collection:, index:, location:, comments: [])
  @collection = collection
  @index = index
  @location = location
  @comments = comments
end

Instance Attribute Details

#collection ⇒ Object (readonly)

untyped

the value being indexed



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# File 'lib/syntax_tree/node.rb', line 413

def collection
  @collection
end

#comments ⇒ Object (readonly)

Array[ Comment | EmbDoc ]

the comments attached to this node



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# File 'lib/syntax_tree/node.rb', line 419

def comments
  @comments
end

#index ⇒ Object (readonly)

nil | Args

the value being passed within the brackets



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# File 'lib/syntax_tree/node.rb', line 416

def index
  @index
end

Instance Method Details

#accept(visitor) ⇒ Object 



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# File 'lib/syntax_tree/node.rb', line 428

def accept(visitor)
  visitor.visit_aref(self)
end

#child_nodes ⇒ Object Also known as: deconstruct 



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# File 'lib/syntax_tree/node.rb', line 432

def child_nodes
  [collection, index]
end

#deconstruct_keys(keys) ⇒ Object 



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# File 'lib/syntax_tree/node.rb', line 438

def deconstruct_keys(keys)
  {
    collection: collection,
    index: index,
    location: location,
    comments: comments
  }
end

#format(q) ⇒ Object 



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# File 'lib/syntax_tree/node.rb', line 447

def format(q)
  q.group do
    q.format(collection)
    q.text("[")

    if index
      q.indent do
        q.breakable("")
        q.format(index)
      end
      q.breakable("")
    end

    q.text("]")
  end
end