class Prism::StatementsNode

Represents a set of statements contained within some scope.

foo; bar; baz
^^^^^^^^^^^^^

Attributes

body[R]

attr_reader body: Array

Public Class Methods

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

def initialize: (Array body, Location location) -> void

# File lib/prism/node.rb, line 17451
def initialize(source, body, location)
  @source = source
  @location = location
  @body = body
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 17522
def self.type
  :statements_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 17528
def ===(other)
  other.is_a?(StatementsNode) &&
    (body.length == other.body.length) &&
    body.zip(other.body).all? { |left, right| left === right }
end
accept(visitor) click to toggle source

def accept: (Visitor visitor) -> void

# File lib/prism/node.rb, line 17458
def accept(visitor)
  visitor.visit_statements_node(self)
end
child_nodes() click to toggle source

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

# File lib/prism/node.rb, line 17463
def child_nodes
  [*body]
end
Also aliased as: deconstruct
comment_targets() click to toggle source

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

# File lib/prism/node.rb, line 17473
def comment_targets
  [*body] #: Array[Prism::node | Location]
end
compact_child_nodes() click to toggle source

def compact_child_nodes: () -> Array

# File lib/prism/node.rb, line 17468
def compact_child_nodes
  [*body]
end
copy(body: self.body, location: self.location) click to toggle source

def copy: (?body: Array, ?location: Location) -> StatementsNode

# File lib/prism/node.rb, line 17478
def copy(body: self.body, location: self.location)
  StatementsNode.new(source, body, location)
end
deconstruct()

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

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

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

# File lib/prism/node.rb, line 17486
def deconstruct_keys(keys)
  { body: body, location: location }
end
inspect() click to toggle source

def inspect -> String

# File lib/prism/node.rb, line 17494
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 17512
def type
  :statements_node
end