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

#pretty_print, #to_json

Constructor Details

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

Returns a new instance of Case.



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# File 'lib/syntax_tree/node.rb', line 2603

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



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# File 'lib/syntax_tree/node.rb', line 2601

def comments
  @comments
end

#consequent ⇒ Object (readonly)

In | When

the next clause in the chain



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# File 'lib/syntax_tree/node.rb', line 2598

def consequent
  @consequent
end

#keyword ⇒ Object (readonly)

Kw

the keyword that opens this expression



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# File 'lib/syntax_tree/node.rb', line 2592

def keyword
  @keyword
end

#value ⇒ Object (readonly)

nil | untyped

optional value being switched on



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# File 'lib/syntax_tree/node.rb', line 2595

def value
  @value
end

Instance Method Details

#accept(visitor) ⇒ Object 



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# File 'lib/syntax_tree/node.rb', line 2611

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

#child_nodes ⇒ Object Also known as: deconstruct 



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# File 'lib/syntax_tree/node.rb', line 2615

def child_nodes
  [keyword, value, consequent]
end

#deconstruct_keys(keys) ⇒ Object 



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# File 'lib/syntax_tree/node.rb', line 2621

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

#format(q) ⇒ Object 



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# File 'lib/syntax_tree/node.rb', line 2631

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