class Prism::FlipFlopNode

Represents the use of the ‘..` or `…` operators to create flip flops.

baz if foo .. bar
       ^^^^^^^^^^

Attributes

flags[R]

protected attr_reader flags: Integer

left[R]

attr_reader left: Prism::node?

right[R]

attr_reader right: Prism::node?

Public Class Methods

new(source, flags, left, right, operator_loc, location) click to toggle source

def initialize: (Integer flags, Prism::node? left, Prism::node? right, Location operator_loc, Location location) -> void

# File prism/node.rb, line 6885
def initialize(source, flags, left, right, operator_loc, location)
  @source = source
  @location = location
  @flags = flags
  @left = left
  @right = right
  @operator_loc = operator_loc
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 prism/node.rb, line 6986
def self.type
  :flip_flop_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 6992
def ===(other)
  other.is_a?(FlipFlopNode) &&
    (flags === other.flags) &&
    (left === other.left) &&
    (right === other.right) &&
    (operator_loc.nil? == other.operator_loc.nil?)
end

accept(visitor) click to toggle source

def accept: (Visitor visitor) -> void

# File prism/node.rb, line 6895
def accept(visitor)
  visitor.visit_flip_flop_node(self)
end

child_nodes() click to toggle source

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

# File prism/node.rb, line 6900
def child_nodes
  [left, right]
end

Also aliased as: deconstruct

comment_targets() click to toggle source

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

# File prism/node.rb, line 6913
def comment_targets
  [*left, *right, operator_loc] #: Array[Prism::node | Location]
end

compact_child_nodes() click to toggle source

def compact_child_nodes: () -> Array

# File prism/node.rb, line 6905
def compact_child_nodes
  compact = [] #: Array[Prism::node]
  compact << left if left
  compact << right if right
  compact
end

copy(flags: self.flags, left: self.left, right: self.right, operator_loc: self.operator_loc, location: self.location) click to toggle source

def copy: (?flags: Integer, ?left: Prism::node?, ?right: Prism::node?, ?operator_loc: Location, ?location: Location) -> FlipFlopNode

# File prism/node.rb, line 6918
def copy(flags: self.flags, left: self.left, right: self.right, operator_loc: self.operator_loc, location: self.location)
  FlipFlopNode.new(source, flags, left, right, operator_loc, 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, left: Prism::node?, right: Prism::node?, operator_loc: Location, location: Location }

# File prism/node.rb, line 6926
def deconstruct_keys(keys)
  { flags: flags, left: left, right: right, operator_loc: operator_loc, location: location }
end

exclude_end?() click to toggle source

def exclude_end?: () -> bool

# File prism/node.rb, line 6948
def exclude_end?
  flags.anybits?(RangeFlags::EXCLUDE_END)
end

inspect() click to toggle source

def inspect -> String

# File prism/node.rb, line 6958
def inspect
  InspectVisitor.compose(self)
end

operator() click to toggle source

def operator: () -> String

# File prism/node.rb, line 6953
def operator
  operator_loc.slice
end

operator_loc() click to toggle source

attr_reader operator_loc: Location

# File prism/node.rb, line 6941
def operator_loc
  location = @operator_loc
  return location if location.is_a?(Location)
  @operator_loc = Location.new(source, location >> 32, location & 0xFFFFFFFF)
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 prism/node.rb, line 6976
def type
  :flip_flop_node
end