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.



2673
2674
2675
2676
2677
2678
2679
 
# File 'lib/syntax_tree/node.rb', line 2673

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



2671
2672
2673
 
# File 'lib/syntax_tree/node.rb', line 2671

def comments
  @comments
end

#consequent ⇒ Object (readonly)

In | When

the next clause in the chain



2668
2669
2670
 
# File 'lib/syntax_tree/node.rb', line 2668

def consequent
  @consequent
end

#keyword ⇒ Object (readonly)

Kw

the keyword that opens this expression



2662
2663
2664
 
# File 'lib/syntax_tree/node.rb', line 2662

def keyword
  @keyword
end

#value ⇒ Object (readonly)

nil | untyped

optional value being switched on



2665
2666
2667
 
# File 'lib/syntax_tree/node.rb', line 2665

def value
  @value
end

Instance Method Details

#accept(visitor) ⇒ Object 



2681
2682
2683
 
# File 'lib/syntax_tree/node.rb', line 2681

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

#child_nodes ⇒ Object Also known as: deconstruct 



2685
2686
2687
 
# File 'lib/syntax_tree/node.rb', line 2685

def child_nodes
  [keyword, value, consequent]
end

#deconstruct_keys(_keys) ⇒ Object 



2691
2692
2693
2694
2695
2696
2697
2698
2699
 
# File 'lib/syntax_tree/node.rb', line 2691

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

#format(q) ⇒ Object 



2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
 
# File 'lib/syntax_tree/node.rb', line 2701

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