class Prism::KeywordHashNode

Represents a hash literal without opening and closing braces.

foo(a: b)



attr_reader elements: Array[AssocNode | AssocSplatNode]


protected attr_reader flags: Integer

Public Class Methods

new(source, flags, elements, location) click to toggle source

def initialize: (Integer flags, Array[AssocNode | AssocSplatNode] elements, Location location) -> void

# File prism/node.rb, line 11462
def initialize(source, flags, elements, location)
  @source = source
  @location = location
  @flags = flags
  @elements = elements
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 11543
def self.type

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 11549
def ===(other)
  other.is_a?(KeywordHashNode) &&
    (flags === other.flags) &&
    (elements.length == other.elements.length) && { |left, right| left === right }
accept(visitor) click to toggle source

def accept: (Visitor visitor) -> void

# File prism/node.rb, line 11470
def accept(visitor)
child_nodes() click to toggle source

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

# File prism/node.rb, line 11475
def child_nodes
Also aliased as: deconstruct
comment_targets() click to toggle source

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

# File prism/node.rb, line 11485
def comment_targets
  [*elements] #: Array[Prism::node | Location]
compact_child_nodes() click to toggle source

def compact_child_nodes: () -> Array

# File prism/node.rb, line 11480
def compact_child_nodes
copy(flags: self.flags, elements: self.elements, location: self.location) click to toggle source

def copy: (?flags: Integer, ?elements: Array[AssocNode | AssocSplatNode], ?location: Location) -> KeywordHashNode

# File prism/node.rb, line 11490
def copy(flags: self.flags, elements: self.elements, location: self.location), flags, elements, location)

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

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

def deconstruct_keys: (Array keys) -> { flags: Integer, elements: Array[AssocNode | AssocSplatNode], location: Location }

# File prism/node.rb, line 11498
def deconstruct_keys(keys)
  { flags: flags, elements: elements, location: location }
inspect() click to toggle source

def inspect -> String

# File prism/node.rb, line 11515
def inspect
symbol_keys?() click to toggle source

def symbol_keys?: () -> bool

# File prism/node.rb, line 11510
def symbol_keys?
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 11533
def type