class Prism::IndexTargetNode

Represents assigning to an index.

foo[bar], = 1
^^^^^^^^

begin
rescue => foo[bar]
          ^^^^^^^^
end

for foo[bar] in baz do end
    ^^^^^^^^

Attributes

arguments[R]

attr_reader arguments: ArgumentsNode?

block[R]

attr_reader block: Prism::node?

flags[R]

protected attr_reader flags: Integer

receiver[R]

attr_reader receiver: Prism::node

Public Class Methods

new(source, flags, receiver, opening_loc, arguments, closing_loc, block, location) click to toggle source

def initialize: (Integer flags, Prism::node receiver, Location opening_loc, ArgumentsNode? arguments, Location closing_loc, Prism::node? block, Location location) -> void

# File lib/prism/node.rb, line 9719
def initialize(source, flags, receiver, opening_loc, arguments, closing_loc, block, location)
  @source = source
  @newline = false
  @location = location
  @flags = flags
  @receiver = receiver
  @opening_loc = opening_loc
  @arguments = arguments
  @closing_loc = closing_loc
  @block = block
end

type() click to toggle source

Similar to type, this method returns a symbol that you can use for splitting on the type of the node without having to do a long === chain. Note that like type, it will still be slower than using == for a single class, but should be faster in a case statement or an array comparison.

def self.type: () -> Symbol

# File lib/prism/node.rb, line 9854
def self.type
  :index_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 lib/prism/node.rb, line 9860
def ===(other)
  other.is_a?(IndexTargetNode) &&
    (flags === other.flags) &&
    (receiver === other.receiver) &&
    (opening_loc.nil? == other.opening_loc.nil?) &&
    (arguments === other.arguments) &&
    (closing_loc.nil? == other.closing_loc.nil?) &&
    (block === other.block)
end

accept(visitor) click to toggle source

def accept: (Visitor visitor) -> void

# File lib/prism/node.rb, line 9732
def accept(visitor)
  visitor.visit_index_target_node(self)
end

attribute_write?() click to toggle source

def attribute_write?: () -> bool

# File lib/prism/node.rb, line 9806
def attribute_write?
  flags.anybits?(CallNodeFlags::ATTRIBUTE_WRITE)
end

child_nodes() click to toggle source

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

# File lib/prism/node.rb, line 9737
def child_nodes
  [receiver, arguments, block]
end

Also aliased as: deconstruct

closing() click to toggle source

def closing: () -> String

# File lib/prism/node.rb, line 9821
def closing
  closing_loc.slice
end

closing_loc() click to toggle source

attr_reader closing_loc: Location

# File lib/prism/node.rb, line 9786
def closing_loc
  location = @closing_loc
  return location if location.is_a?(Location)
  @closing_loc = Location.new(source, location >> 32, location & 0xFFFFFFFF)
end

comment_targets() click to toggle source

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

# File lib/prism/node.rb, line 9751
def comment_targets
  [receiver, opening_loc, *arguments, closing_loc, *block] #: Array[Prism::node | Location]
end

compact_child_nodes() click to toggle source

def compact_child_nodes: () -> Array

# File lib/prism/node.rb, line 9742
def compact_child_nodes
  compact = [] #: Array[Prism::node]
  compact << receiver
  compact << arguments if arguments
  compact << block if block
  compact
end

copy(flags: self.flags, receiver: self.receiver, opening_loc: self.opening_loc, arguments: self.arguments, closing_loc: self.closing_loc, block: self.block, location: self.location) click to toggle source

def copy: (?flags: Integer, ?receiver: Prism::node, ?opening_loc: Location, ?arguments: ArgumentsNode?, ?closing_loc: Location, ?block: Prism::node?, ?location: Location) -> IndexTargetNode

# File lib/prism/node.rb, line 9756
def copy(flags: self.flags, receiver: self.receiver, opening_loc: self.opening_loc, arguments: self.arguments, closing_loc: self.closing_loc, block: self.block, location: self.location)
  IndexTargetNode.new(source, flags, receiver, opening_loc, arguments, closing_loc, block, location)
end

deconstruct()

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

Alias for: child_nodes

deconstruct_keys(keys) click to toggle source

def deconstruct_keys: (Array keys) -> { flags: Integer, receiver: Prism::node, opening_loc: Location, arguments: ArgumentsNode?, closing_loc: Location, block: Prism::node?, location: Location }

# File lib/prism/node.rb, line 9764
def deconstruct_keys(keys)
  { flags: flags, receiver: receiver, opening_loc: opening_loc, arguments: arguments, closing_loc: closing_loc, block: block, location: location }
end

ignore_visibility?() click to toggle source

def ignore_visibility?: () -> bool

# File lib/prism/node.rb, line 9811
def ignore_visibility?
  flags.anybits?(CallNodeFlags::IGNORE_VISIBILITY)
end

inspect() click to toggle source

def inspect -> String

# File lib/prism/node.rb, line 9826
def inspect
  InspectVisitor.compose(self)
end

opening() click to toggle source

def opening: () -> String

# File lib/prism/node.rb, line 9816
def opening
  opening_loc.slice
end

opening_loc() click to toggle source

attr_reader opening_loc: Location

# File lib/prism/node.rb, line 9776
def opening_loc
  location = @opening_loc
  return location if location.is_a?(Location)
  @opening_loc = Location.new(source, location >> 32, location & 0xFFFFFFFF)
end

safe_navigation?() click to toggle source

def safe_navigation?: () -> bool

# File lib/prism/node.rb, line 9796
def safe_navigation?
  flags.anybits?(CallNodeFlags::SAFE_NAVIGATION)
end

type() click to toggle source

Sometimes you want to check an instance of a node against a list of classes to see what kind of behavior to perform. Usually this is done by calling ‘[cls1, cls2].include?(node.class)` or putting the node into a case statement and doing `case node; when cls1; when cls2; end`. Both of these approaches are relatively slow because of the constant lookups, method calls, and/or array allocations.

Instead, you can call type, which will return to you a symbol that you can use for comparison. This is faster than the other approaches because it uses a single integer comparison, but also because if you’re on CRuby you can take advantage of the fact that case statements with all symbol keys will use a jump table.

def type: () -> Symbol

# File lib/prism/node.rb, line 9844
def type
  :index_target_node
end

variable_call?() click to toggle source

def variable_call?: () -> bool

# File lib/prism/node.rb, line 9801
def variable_call?
  flags.anybits?(CallNodeFlags::VARIABLE_CALL)
end