class Prism::CaseNode - Documentation for Ruby 3.4
Description: class Prism::CaseNode: Represents the use of a case statement.
Keywords: ruby,class,Prism::CaseNode

# class Prism::CaseNode

Represents the use of a case statement.

    case true
    when false
    end
    ^^^^^^^^^^

### Attributes

conditions [R]

Represents the conditions of the case statement.

    case true; when false; end
               ^^^^^^^^^^

else_clause [R]

Represents the else clause of the case statement.

    case true; when false; else; end
                           ^^^^

predicate [R]

Represents the predicate of the case statement. This can be either `nil` or any non-void expressions.

    case true; when false; end
         ^^^^

### Public Class Methods

new (source, node_id, location, flags, predicate, conditions, else_clause, case_keyword_loc, end_keyword_loc)
Source

    # File lib/prism/node.rb, line 3683
    def initialize(source, node_id, location, flags, predicate, conditions, else_clause, case_keyword_loc, end_keyword_loc)
      @source = source
      @node_id = node_id
      @location = location
      @flags = flags
      @predicate = predicate
      @conditions = conditions
      @else_clause = else_clause
      @case_keyword_loc = case_keyword_loc
      @end_keyword_loc = end_keyword_loc
    end

Initialize a new `CaseNode` node.

type ()
Source

    # File lib/prism/node.rb, line 3803
    def self.type
      :case_node
    end

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

### Public Instance Methods

=== (other)
Source

    # File lib/prism/node.rb, line 3809
    def ===(other)
      other.is_a?(CaseNode) &&
        (predicate === other.predicate) &&
        (conditions.length == other.conditions.length) &&
        conditions.zip(other.conditions).all? { |left, right| left === right } &&
        (else_clause === other.else_clause) &&
        (case_keyword_loc.nil? == other.case_keyword_loc.nil?) &&
        (end_keyword_loc.nil? == other.end_keyword_loc.nil?)
    end

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

accept (visitor)
Source

    # File lib/prism/node.rb, line 3696
    def accept(visitor)
      visitor.visit_case_node(self)
    end

def accept: (`Visitor` visitor) -> void

case_keyword ()
Source

    # File lib/prism/node.rb, line 3783
    def case_keyword
      case_keyword_loc.slice
    end

def `case_keyword`: () -> `String`

case_keyword_loc ()
Source

    # File lib/prism/node.rb, line 3754
    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

Represents the location of the `case` keyword.

    case true; when false; end
    ^^^^

child_nodes ()
Source

    # File lib/prism/node.rb, line 3701
    def child_nodes
      [predicate, *conditions, else_clause]
    end

def `child_nodes`: () -> Array

Also aliased as: deconstruct
comment_targets ()
Source

    # File lib/prism/node.rb, line 3715
    def comment_targets
      [*predicate, *conditions, *else_clause, case_keyword_loc, end_keyword_loc] #: Array[Prism::node | Location]
    end

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

compact_child_nodes ()
Source

    # File lib/prism/node.rb, line 3706
    def compact_child_nodes
      compact = [] #: Array[Prism::node]
      compact << predicate if predicate
      compact.concat(conditions)
      compact << else_clause if else_clause
      compact
    end

def `compact_child_nodes`: () -> Array

consequent ()
Source

    # File lib/prism/node_ext.rb, line 479
    def consequent
      deprecated("else_clause")
      else_clause
    end

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

copy (node_id: self.node_id, location: self.location, flags: self.flags, predicate: self.predicate, conditions: self.conditions, else_clause: self.else_clause, case_keyword_loc: self.case_keyword_loc, end_keyword_loc: self.end_keyword_loc)
Source

    # File lib/prism/node.rb, line 3720
    def copy(node_id: self.node_id, location: self.location, flags: self.flags, predicate: self.predicate, conditions: self.conditions, else_clause: self.else_clause, case_keyword_loc: self.case_keyword_loc, end_keyword_loc: self.end_keyword_loc)
      CaseNode.new(source, node_id, location, flags, predicate, conditions, else_clause, case_keyword_loc, end_keyword_loc)
    end

def copy: (?node_id: `Integer`, ?location: `Location`, ?flags: `Integer`, ?predicate: Prism::node?, ?conditions: Array, ?else_clause: `ElseNode`?, ?case_keyword_loc: `Location`, ?end_keyword_loc: `Location`) -> `CaseNode`

deconstruct ()

def deconstruct: () -> Array

Alias for: child_nodes
deconstruct_keys (keys)
Source

    # File lib/prism/node.rb, line 3728
    def deconstruct_keys(keys)
      { node_id: node_id, location: location, predicate: predicate, conditions: conditions, else_clause: else_clause, case_keyword_loc: case_keyword_loc, end_keyword_loc: end_keyword_loc }
    end

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

end_keyword ()
Source

    # File lib/prism/node.rb, line 3788
    def end_keyword
      end_keyword_loc.slice
    end

def `end_keyword`: () -> `String`

end_keyword_loc ()
Source

    # File lib/prism/node.rb, line 3770
    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

Represents the location of the `end` keyword.

    case true; when false; end
                           ^^^

inspect ()
Source

    # File lib/prism/node.rb, line 3793
    def inspect
      InspectVisitor.compose(self)
    end

def inspect -> `String`

save_case_keyword_loc (repository)
Source

    # File lib/prism/node.rb, line 3762
    def save_case_keyword_loc(repository)
      repository.enter(node_id, :case_keyword_loc)
    end

Save the `case_keyword_loc` location using the given saved source so that it can be retrieved later.

save_end_keyword_loc (repository)
Source

    # File lib/prism/node.rb, line 3778
    def save_end_keyword_loc(repository)
      repository.enter(node_id, :end_keyword_loc)
    end

Save the `end_keyword_loc` location using the given saved source so that it can be retrieved later.

type ()
Source

    # File lib/prism/node.rb, line 3798
    def type
      :case_node
    end

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