class Prism::MultiTargetNode

Represents a multi-target expression.

a, (b, c) = 1, 2, 3
   ^^^^^^

This can be a part of ‘MultiWriteNode` as above, or the target of a `for` loop

for a, b in [[1, 2], [3, 4]]
    ^^^^

Attributes

lefts[R]

Represents the targets expressions before a splat node.

a, (b, c, *) = 1, 2, 3, 4, 5
    ^^^^

The splat node can be absent, in that case all target expressions are in the left field.

a, (b, c) = 1, 2, 3, 4, 5
    ^^^^

rest[R]

Represents a splat node in the target expression.

a, (b, *c) = 1, 2, 3, 4
       ^^

The variable can be empty, this results in a ‘SplatNode` with a `nil` expression field.

a, (b, *) = 1, 2, 3, 4
       ^

If the ‘*` is omitted, this field will contain an `ImplicitRestNode`

a, (b,) = 1, 2, 3, 4
     ^

rights[R]

Represents the targets expressions after a splat node.

a, (*, b, c) = 1, 2, 3, 4, 5
       ^^^^

Public Class Methods

new(source, node_id, location, flags, lefts, rest, rights, lparen_loc, rparen_loc) click to toggle source

Initialize a new MultiTargetNode node.

# File prism/node.rb, line 13017
def initialize(source, node_id, location, flags, lefts, rest, rights, lparen_loc, rparen_loc)
  @source = source
  @node_id = node_id
  @location = location
  @flags = flags
  @lefts = lefts
  @rest = rest
  @rights = rights
  @lparen_loc = lparen_loc
  @rparen_loc = rparen_loc
end

type() click to toggle source

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

# File prism/node.rb, line 13164
def self.type
  :multi_target_node
end

Public Instance Methods

===(other) click to toggle source

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

# File prism/node.rb, line 13170
def ===(other)
  other.is_a?(MultiTargetNode) &&
    (lefts.length == other.lefts.length) &&
    lefts.zip(other.lefts).all? { |left, right| left === right } &&
    (rest === other.rest) &&
    (rights.length == other.rights.length) &&
    rights.zip(other.rights).all? { |left, right| left === right } &&
    (lparen_loc.nil? == other.lparen_loc.nil?) &&
    (rparen_loc.nil? == other.rparen_loc.nil?)
end

accept(visitor) click to toggle source

def accept: (Visitor visitor) -> void

# File prism/node.rb, line 13030
def accept(visitor)
  visitor.visit_multi_target_node(self)
end

child_nodes() click to toggle source

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

# File prism/node.rb, line 13035
def child_nodes
  [*lefts, rest, *rights]
end

Also aliased as: deconstruct

comment_targets() click to toggle source

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

# File prism/node.rb, line 13049
def comment_targets
  [*lefts, *rest, *rights, *lparen_loc, *rparen_loc] #: Array[Prism::node | Location]
end

compact_child_nodes() click to toggle source

def compact_child_nodes: () -> Array

# File prism/node.rb, line 13040
def compact_child_nodes
  compact = [] #: Array[Prism::node]
  compact.concat(lefts)
  compact << rest if rest
  compact.concat(rights)
  compact
end

copy(node_id: self.node_id, location: self.location, flags: self.flags, lefts: self.lefts, rest: self.rest, rights: self.rights, lparen_loc: self.lparen_loc, rparen_loc: self.rparen_loc) click to toggle source

# File prism/node.rb, line 13054
def copy(node_id: self.node_id, location: self.location, flags: self.flags, lefts: self.lefts, rest: self.rest, rights: self.rights, lparen_loc: self.lparen_loc, rparen_loc: self.rparen_loc)
  MultiTargetNode.new(source, node_id, location, flags, lefts, rest, rights, lparen_loc, rparen_loc)
end

deconstruct()

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

Alias for: child_nodes

deconstruct_keys(keys) click to toggle source

def deconstruct_keys: (Array keys) -> { node_id: Integer, location: Location, lefts: Array[LocalVariableTargetNode | InstanceVariableTargetNode | ClassVariableTargetNode | GlobalVariableTargetNode | ConstantTargetNode | ConstantPathTargetNode | CallTargetNode | IndexTargetNode | MultiTargetNode | RequiredParameterNode | BackReferenceReadNode | NumberedReferenceReadNode], rest: ImplicitRestNode | SplatNode | nil, rights: Array[LocalVariableTargetNode | InstanceVariableTargetNode | ClassVariableTargetNode | GlobalVariableTargetNode | ConstantTargetNode | ConstantPathTargetNode | CallTargetNode | IndexTargetNode | MultiTargetNode | RequiredParameterNode | BackReferenceReadNode | NumberedReferenceReadNode], lparen_loc: Location?, rparen_loc: Location? }

# File prism/node.rb, line 13062
def deconstruct_keys(keys)
  { node_id: node_id, location: location, lefts: lefts, rest: rest, rights: rights, lparen_loc: lparen_loc, rparen_loc: rparen_loc }
end

inspect() click to toggle source

def inspect -> String

# File prism/node.rb, line 13154
def inspect
  InspectVisitor.compose(self)
end

lparen() click to toggle source

def lparen: () -> String?

# File prism/node.rb, line 13144
def lparen
  lparen_loc&.slice
end

lparen_loc() click to toggle source

The location of the opening parenthesis.

a, (b, c) = 1, 2, 3
   ^

# File prism/node.rb, line 13103
def lparen_loc
  location = @lparen_loc
  case location
  when nil
    nil
  when Location
    location
  else
    @lparen_loc = Location.new(source, location >> 32, location & 0xFFFFFFFF)
  end
end

rparen() click to toggle source

def rparen: () -> String?

# File prism/node.rb, line 13149
def rparen
  rparen_loc&.slice
end

rparen_loc() click to toggle source

The location of the closing parenthesis.

a, (b, c) = 1, 2, 3
        ^

# File prism/node.rb, line 13125
def rparen_loc
  location = @rparen_loc
  case location
  when nil
    nil
  when Location
    location
  else
    @rparen_loc = Location.new(source, location >> 32, location & 0xFFFFFFFF)
  end
end

save_lparen_loc(repository) click to toggle source

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

# File prism/node.rb, line 13117
def save_lparen_loc(repository)
  repository.enter(node_id, :lparen_loc) unless @lparen_loc.nil?
end

save_rparen_loc(repository) click to toggle source

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

# File prism/node.rb, line 13139
def save_rparen_loc(repository)
  repository.enter(node_id, :rparen_loc) unless @rparen_loc.nil?
end

type() click to toggle source

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

# File prism/node.rb, line 13159
def type
  :multi_target_node
end