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Class: Prism::CaseMatchNode

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, PrismNode
Instance Chain:
self, PrismNode
Inherits: PrismNode
  • ::Object
Defined in: lib/prism/node.rb,
ext/prism/api_node.c,
lib/prism/node_ext.rb

Overview

Represents the use of a case statement for pattern matching.

case true
in false
end
^^^^^^^^^

Class Method Summary

Instance Attribute Summary

Instance Method Summary

Constructor Details

.new(source, node_id, location, flags, predicate, conditions, consequent, case_keyword_loc, end_keyword_loc) ⇒ CaseMatchNode

Initialize a new CaseMatchNode node.

[ GitHub ] 

  


# File 'lib/prism/node.rb', line 2911



def initialize(source, node_id, location, flags, predicate, conditions, consequent, case_keyword_loc, end_keyword_loc)
  @source = source
  @node_id = node_id
  @location = location
  @flags = flags
  @predicate = predicate
  @conditions = conditions
  @consequent = consequent
  @case_keyword_loc = case_keyword_loc
  @end_keyword_loc = end_keyword_loc
end


  







Class Method Details



  

    .type  
  



  

    
Return a symbol representation of this node type. See Node::type.

  



  [ GitHub ]


  

  


# File 'lib/prism/node.rb', line 3001



def self.type
  :case_match_node
end


  







Instance Attribute Details



  

    #conditions   (readonly)
  



  

    
attr_reader conditions: Array

  



  [ GitHub ]


  

  


# File 'lib/prism/node.rb', line 2963



attr_reader :conditions


  








  

    #consequent   (readonly)
  



  

    
Returns the else clause of the case match node. This method is deprecated
in favor of #else_clause.

  



  [ GitHub ]


  

  


# File 'lib/prism/node_ext.rb', line 470



attr_reader :consequent


  








  

    #predicate   (readonly)
  



  

    
attr_reader predicate: Prism.node?

  



  [ GitHub ]


  

  


# File 'lib/prism/node.rb', line 2961



attr_reader :predicate


  







Instance Method Details



  

    #===(other)  
  



  

    
Implements case-equality for the node. This is effectively == but without
comparing the value of locations. Locations are checked only for presence.

  



  [ GitHub ]


  

  


# File 'lib/prism/node.rb', line 3007



def ===(other)
  other.is_a?(CaseMatchNode) &&
    (predicate === other.predicate) &&
    (conditions.length == other.conditions.length) &&
    conditions.zip(other.conditions).all? { |left, right| left === right } &&
    (consequent === other.consequent) &&
    (case_keyword_loc.nil? == other.case_keyword_loc.nil?) &&
    (end_keyword_loc.nil? == other.end_keyword_loc.nil?)
end


  








  

    #accept(visitor)  
  



  

    
def accept: (Visitor visitor) -> void

  



  [ GitHub ]


  

  


# File 'lib/prism/node.rb', line 2924



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


  








  

    #case_keyword  
  



  

    
def case_keyword: () -> String

  



  [ GitHub ]


  

  


# File 'lib/prism/node.rb', line 2981



def case_keyword
  case_keyword_loc.slice
end


  








  

    #case_keyword_loc  
  



  

    
attr_reader case_keyword_loc: Location

  



  [ GitHub ]


  

  


# File 'lib/prism/node.rb', line 2967



def case_keyword_loc
  location = @case_keyword_loc
  return location if location.is_a?(Location)
  @case_keyword_loc = Location.new(source, location >> 32, location & 0xFFFFFFFF)
end


  








  

    #child_nodes  
    Also known as: #deconstruct
  



  

    
def child_nodes: () -> Array[nil | Node]

  



  [ GitHub ]


  

  


# File 'lib/prism/node.rb', line 2929



def child_nodes
  [predicate, *conditions, consequent]
end


  








  

    #comment_targets  
  



  

    
def comment_targets: () -> Array[Node | Location]

  



  [ GitHub ]


  

  


# File 'lib/prism/node.rb', line 2943



def comment_targets
  [*predicate, *conditions, *consequent, case_keyword_loc, end_keyword_loc] #: Array[Prism::node | Location]
end


  








  

    #compact_child_nodes  
  



  

    
def compact_child_nodes: () -> Array

  



  [ GitHub ]


  

  


# File 'lib/prism/node.rb', line 2934



def compact_child_nodes
  compact = [] #: Array[Prism::node]
  compact << predicate if predicate
  compact.concat(conditions)
  compact << consequent if consequent
  compact
end


  








  

    #copy(node_id: self.node_id, location: self.location, flags: self.flags, predicate: self.predicate, conditions: self.conditions, consequent: self.consequent, case_keyword_loc: self.case_keyword_loc, end_keyword_loc: self.end_keyword_loc)  
  



  

    
def copy: (?node_id: Integer, ?location: Location, ?flags: Integer, ?predicate: Prism.node?, ?conditions: Array, ?consequent: ElseNode?, ?case_keyword_loc: Location, ?end_keyword_loc: Location) -> CaseMatchNode

  



  [ GitHub ]


  

  


# File 'lib/prism/node.rb', line 2948



def copy(node_id: self.node_id, location: self.location, flags: self.flags, predicate: self.predicate, conditions: self.conditions, consequent: self.consequent, case_keyword_loc: self.case_keyword_loc, end_keyword_loc: self.end_keyword_loc)
  CaseMatchNode.new(source, node_id, location, flags, predicate, conditions, consequent, case_keyword_loc, end_keyword_loc)
end


  








  

    #deconstruct  
  



  

    
Alias for #child_nodes.

  



  [ GitHub ]


  

  


# File 'lib/prism/node.rb', line 2953



alias deconstruct child_nodes


  








  

    #deconstruct_keys(keys)  
  



  

    
def deconstruct_keys: (Array keys) -> { node_id: Integer, location: Location, predicate: Prism.node?, conditions: Array, consequent: ElseNode?, case_keyword_loc: Location, end_keyword_loc: Location }

  



  [ GitHub ]


  

  


# File 'lib/prism/node.rb', line 2956



def deconstruct_keys(keys)
  { node_id: node_id, location: location, predicate: predicate, conditions: conditions, consequent: consequent, case_keyword_loc: case_keyword_loc, end_keyword_loc: end_keyword_loc }
end


  








  

    #end_keyword  
  



  

    
def end_keyword: () -> String

  



  [ GitHub ]


  

  


# File 'lib/prism/node.rb', line 2986



def end_keyword
  end_keyword_loc.slice
end


  








  

    #end_keyword_loc  
  



  

    
attr_reader end_keyword_loc: Location

  



  [ GitHub ]


  

  


# File 'lib/prism/node.rb', line 2974



def end_keyword_loc
  location = @end_keyword_loc
  return location if location.is_a?(Location)
  @end_keyword_loc = Location.new(source, location >> 32, location & 0xFFFFFFFF)
end


  








  

    #inspect  
  



  

    
def inspect -> String

  



  [ GitHub ]


  

  


# File 'lib/prism/node.rb', line 2991



def inspect
  InspectVisitor.compose(self)
end


  








  

    #type  
  



  

    
Return a symbol representation of this node type. See Node#type.

  



  [ GitHub ]


  

  


# File 'lib/prism/node.rb', line 2996



def type
  :case_match_node
end