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.



406
407
408
409
410
411
 
# File 'lib/syntax_tree/node.rb', line 406

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



398
399
400
 
# File 'lib/syntax_tree/node.rb', line 398

def collection
  @collection
end

#comments ⇒ Object (readonly)

Array[ Comment | EmbDoc ]

the comments attached to this node



404
405
406
 
# File 'lib/syntax_tree/node.rb', line 404

def comments
  @comments
end

#index ⇒ Object (readonly)

nil | Args

the value being passed within the brackets



401
402
403
 
# File 'lib/syntax_tree/node.rb', line 401

def index
  @index
end

Instance Method Details

#accept(visitor) ⇒ Object 



413
414
415
 
# File 'lib/syntax_tree/node.rb', line 413

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

#child_nodes ⇒ Object Also known as: deconstruct 



417
418
419
 
# File 'lib/syntax_tree/node.rb', line 417

def child_nodes
  [collection, index]
end

#deconstruct_keys(keys) ⇒ Object 



423
424
425
426
427
428
429
430
 
# File 'lib/syntax_tree/node.rb', line 423

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

#format(q) ⇒ Object 



432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
 
# File 'lib/syntax_tree/node.rb', line 432

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