Class: SyntaxTree::Case

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

Overview

Case represents the beginning of a case chain.

case value
when 1
  "one"
when 2
  "two"
else
  "number"
end

Instance Attribute Summary collapse

Attributes inherited from Node

#location

Instance Method Summary collapse

Methods inherited from Node

#construct_keys, #pretty_print, #to_json

Constructor Details

#initialize(keyword:, value:, consequent:, location:, comments: []) ⇒ Case

Returns a new instance of Case.



2707
2708
2709
2710
2711
2712
2713
 
# File 'lib/syntax_tree/node.rb', line 2707

def initialize(keyword:, value:, consequent:, location:, comments: [])
  @keyword = keyword
  @value = value
  @consequent = consequent
  @location = location
  @comments = comments
end

Instance Attribute Details

#comments ⇒ Object (readonly)

Array[ Comment | EmbDoc ]

the comments attached to this node



2705
2706
2707
 
# File 'lib/syntax_tree/node.rb', line 2705

def comments
  @comments
end

#consequent ⇒ Object (readonly)

In | When

the next clause in the chain



2702
2703
2704
 
# File 'lib/syntax_tree/node.rb', line 2702

def consequent
  @consequent
end

#keyword ⇒ Object (readonly)

Kw

the keyword that opens this expression



2696
2697
2698
 
# File 'lib/syntax_tree/node.rb', line 2696

def keyword
  @keyword
end

#value ⇒ Object (readonly)

nil | untyped

optional value being switched on



2699
2700
2701
 
# File 'lib/syntax_tree/node.rb', line 2699

def value
  @value
end

Instance Method Details

#accept(visitor) ⇒ Object 



2715
2716
2717
 
# File 'lib/syntax_tree/node.rb', line 2715

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

#child_nodes ⇒ Object Also known as: deconstruct 



2719
2720
2721
 
# File 'lib/syntax_tree/node.rb', line 2719

def child_nodes
  [keyword, value, consequent]
end

#deconstruct_keys(_keys) ⇒ Object 



2725
2726
2727
2728
2729
2730
2731
2732
2733
 
# File 'lib/syntax_tree/node.rb', line 2725

def deconstruct_keys(_keys)
  {
    keyword: keyword,
    value: value,
    consequent: consequent,
    location: location,
    comments: comments
  }
end

#format(q) ⇒ Object 



2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
 
# File 'lib/syntax_tree/node.rb', line 2735

def format(q)
  q.group do
    q.format(keyword)

    if value
      q.text(" ")
      q.format(value)
    end

    q.breakable(force: true)
    q.format(consequent)
    q.breakable(force: true)

    q.text("end")
  end
end