class Prism::NumberedParametersNode

Represents an implicit set of parameters through the use of numbered parameters within a block or lambda.

-> { _1 + _2 }
^^^^^^^^^^^^^^

Attributes

maximum[R]

attr_reader maximum: Integer

Public Class Methods

new(source, maximum, location) click to toggle source

def initialize: (Integer maximum, Location location) -> void

# File lib/prism/node.rb, line 14064
def initialize(source, maximum, location)
  @source = source
  @location = location
  @maximum = maximum
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 14135
def self.type
  :numbered_parameters_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 14141
def ===(other)
  other.is_a?(NumberedParametersNode) &&
    (maximum === other.maximum)
end
accept(visitor) click to toggle source

def accept: (Visitor visitor) -> void

# File lib/prism/node.rb, line 14071
def accept(visitor)
  visitor.visit_numbered_parameters_node(self)
end
child_nodes() click to toggle source

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

# File lib/prism/node.rb, line 14076
def child_nodes
  []
end
Also aliased as: deconstruct
comment_targets() click to toggle source

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

# File lib/prism/node.rb, line 14086
def comment_targets
  [] #: Array[Prism::node | Location]
end
compact_child_nodes() click to toggle source

def compact_child_nodes: () -> Array

# File lib/prism/node.rb, line 14081
def compact_child_nodes
  []
end
copy(maximum: self.maximum, location: self.location) click to toggle source

def copy: (?maximum: Integer, ?location: Location) -> NumberedParametersNode

# File lib/prism/node.rb, line 14091
def copy(maximum: self.maximum, location: self.location)
  NumberedParametersNode.new(source, maximum, location)
end
deconstruct()

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

Alias for: child_nodes
deconstruct_keys(keys) click to toggle source

def deconstruct_keys: (Array keys) -> { maximum: Integer, location: Location }

# File lib/prism/node.rb, line 14099
def deconstruct_keys(keys)
  { maximum: maximum, location: location }
end
inspect() click to toggle source

def inspect -> String

# File lib/prism/node.rb, line 14107
def inspect
  InspectVisitor.compose(self)
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 14125
def type
  :numbered_parameters_node
end