class Prism::CaseMatchNode

Represents the use of a case statement for pattern matching.

case true
in 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 4675
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 CaseMatchNode node.

Public Instance Methods

conditions → Array[InNode]

Source

# File lib/prism/node.rb, line 4779
def conditions
  @conditions
end

Represents the conditions of the case match.

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

consequent ()

Source

# File lib/prism/node_ext.rb, line 476
def consequent
  deprecated("else_clause")
  else_clause
end

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

else_clause → ElseNode | nil

Source

# File lib/prism/node.rb, line 4790
def else_clause
  @else_clause
end

Represents the else clause of the case match.

case true; in false; else; end
                     ^^^^

predicate → Node | nil

Source

# File lib/prism/node.rb, line 4768
def predicate
  @predicate
end

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

case true; in false; end
^^^^

Locations

Public Instance Methods

case_keyword_loc → Location

Source

# File lib/prism/node.rb, line 4802
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; in false; end
^^^^

end_keyword_loc → Location

Source

# File lib/prism/node.rb, line 4823
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; in false; end
                     ^^^

Node Interface

Public Class Methods

type ()

Source

# File lib/prism/node.rb, line 4751
def self.type
  :case_match_node
end

See Node.type.

Public Instance Methods

accept (visitor)

Source

# File lib/prism/node.rb, line 4699
def accept(visitor)
  visitor.visit_case_match_node(self)
end

See Node.accept.

child_nodes ()

Source

# File lib/prism/node.rb, line 4704
def child_nodes
  [predicate, *conditions, else_clause]
end

See Node.child_nodes.

Also aliased as: deconstruct

comment_targets ()

Source

# File lib/prism/node.rb, line 4727
def comment_targets
  [*predicate, *conditions, *else_clause, case_keyword_loc, end_keyword_loc] #: Array[Prism::node | Location]
end

See Node.comment_targets.

compact_child_nodes ()

Source

# File lib/prism/node.rb, line 4718
def compact_child_nodes
  compact = [] #: Array[Prism::node]
  compact << predicate if predicate
  compact.concat(conditions)
  compact << else_clause if else_clause
  compact
end

See Node.compact_child_nodes.

copy(**fields) → CaseMatchNode

Source

# File lib/prism/node.rb, line 4735
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)
  CaseMatchNode.new(source, node_id, location, flags, predicate, conditions, else_clause, case_keyword_loc, end_keyword_loc)
end

Creates a copy of self with the given fields, using self as the template.

deconstruct ()

Alias for: child_nodes

each_child_node () { |predicate| ... }

Source

# File lib/prism/node.rb, line 4709
def each_child_node
  return to_enum(:each_child_node) unless block_given?

  yield predicate if predicate
  conditions.each { |node| yield node }
  yield else_clause if else_clause
end

See Node.each_child_node.

type ()

Source

# File lib/prism/node.rb, line 4746
def type
  :case_match_node
end

See Node#type.

Repository

Public Instance Methods

save_case_keyword_loc (repository)

Source

# File lib/prism/node.rb, line 4811
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 4832
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.

Slicing

Public Instance Methods

case_keyword → String

Source

# File lib/prism/node.rb, line 4842
def case_keyword
  case_keyword_loc.slice
end

Slice the location of case_keyword_loc from the source.

end_keyword → String

Source

# File lib/prism/node.rb, line 4850
def end_keyword
  end_keyword_loc.slice
end

Slice the location of end_keyword_loc from the source.