class Prism::ModuleNode

Represents a module declaration involving the ‘module` keyword.

module Foo end



attr_reader body: Node?


attr_reader constant_path: Node


attr_reader end_keyword_loc: Location


attr_reader locals: Array


attr_reader name: Symbol

Public Class Methods

new(locals, module_keyword_loc, constant_path, body, end_keyword_loc, name, location) click to toggle source

def initialize: (locals: Array, module_keyword_loc: Location, constant_path: Node, body: Node?, end_keyword_loc: Location, name: Symbol, location: Location) -> void

# File lib/prism/node.rb, line 11587
def initialize(locals, module_keyword_loc, constant_path, body, end_keyword_loc, name, location)
  @locals = locals
  @module_keyword_loc = module_keyword_loc
  @constant_path = constant_path
  @body = body
  @end_keyword_loc = end_keyword_loc
  @name = name
  @location = location
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 11693
def self.type

Public Instance Methods

accept(visitor) click to toggle source

def accept: (visitor: Visitor) -> void

# File lib/prism/node.rb, line 11598
def accept(visitor)
child_nodes() click to toggle source

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

# File lib/prism/node.rb, line 11603
def child_nodes
  [constant_path, body]
Also aliased as: deconstruct
comment_targets() click to toggle source

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

# File lib/prism/node.rb, line 11616
def comment_targets
  [module_keyword_loc, constant_path, *body, end_keyword_loc]
compact_child_nodes() click to toggle source

def compact_child_nodes: () -> Array

# File lib/prism/node.rb, line 11608
def compact_child_nodes
  compact = []
  compact << constant_path
  compact << body if body
copy(**params) click to toggle source

def copy: (**params) -> ModuleNode

# File lib/prism/node.rb, line 11621
def copy(**params)
    params.fetch(:locals) { locals },
    params.fetch(:module_keyword_loc) { module_keyword_loc },
    params.fetch(:constant_path) { constant_path },
    params.fetch(:body) { body },
    params.fetch(:end_keyword_loc) { end_keyword_loc },
    params.fetch(:name) { name },
    params.fetch(:location) { location },
deconstruct() click to toggle source

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

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

def deconstruct_keys: (keys: Array) -> Hash[Symbol, nil | Node | Array | String | Token | Array | Location]

# File lib/prism/node.rb, line 11637
def deconstruct_keys(keys)
  { locals: locals, module_keyword_loc: module_keyword_loc, constant_path: constant_path, body: body, end_keyword_loc: end_keyword_loc, name: name, location: location }
end_keyword() click to toggle source

def end_keyword: () -> String

# File lib/prism/node.rb, line 11647
def end_keyword
inspect(inspector = click to toggle source

def inspect(inspector: NodeInspector) -> String

# File lib/prism/node.rb, line 11652
def inspect(inspector =
  inspector << inspector.header(self)
  inspector << "├── locals: #{locals.inspect}\n"
  inspector << "├── module_keyword_loc: #{inspector.location(module_keyword_loc)}\n"
  inspector << "├── constant_path:\n"
  inspector << inspector.child_node(constant_path, "│   ")
  if (body = self.body).nil?
    inspector << "├── body: ∅\n"
    inspector << "├── body:\n"
    inspector << body.inspect(inspector.child_inspector("│   ")).delete_prefix(inspector.prefix)
  inspector << "├── end_keyword_loc: #{inspector.location(end_keyword_loc)}\n"
  inspector << "└── name: #{name.inspect}\n"
module_keyword() click to toggle source

def module_keyword: () -> String

# File lib/prism/node.rb, line 11642
def module_keyword
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 11683
def type