class Prism::KeywordRestParameterNode
Represents a keyword rest parameter to a method, block, or lambda definition.
def a(**b) ^^^ end
Attributes
private attr_reader flags: Integer
attr_reader name: Symbol
?
Public Class Methods
def initialize: (Integer
flags, Symbol
? name, Location
? name_loc
, Location
operator_loc
, Location
location) -> void
# File lib/prism/node.rb, line 11441 def initialize(source, flags, name, name_loc, operator_loc, location) @source = source @newline = false @location = location @flags = flags @name = name @name_loc = name_loc @operator_loc = operator_loc end
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 11561 def self.type :keyword_rest_parameter_node end
Public Instance Methods
def accept: (Visitor
visitor) -> void
# File lib/prism/node.rb, line 11452 def accept(visitor) visitor.visit_keyword_rest_parameter_node(self) end
def child_nodes
: () -> Array[nil | Node]
# File lib/prism/node.rb, line 11457 def child_nodes [] end
def comment_targets
: () -> Array[Node | Location]
# File lib/prism/node.rb, line 11467 def comment_targets [*name_loc, operator_loc] #: Array[Prism::node | Location] end
def compact_child_nodes
: () -> Array
# File lib/prism/node.rb, line 11462 def compact_child_nodes [] end
def copy: (?flags: Integer
, ?name: Symbol
?, ?name_loc: Location
?, ?operator_loc: Location
, ?location: Location
) -> KeywordRestParameterNode
# File lib/prism/node.rb, line 11472 def copy(flags: self.flags, name: self.name, name_loc: self.name_loc, operator_loc: self.operator_loc, location: self.location) KeywordRestParameterNode.new(source, flags, name, name_loc, operator_loc, location) end
def deconstruct_keys
: (Array keys) -> { flags: Integer
, name: Symbol
?, name_loc
: Location
?, operator_loc
: Location
, location: Location
}
# File lib/prism/node.rb, line 11480 def deconstruct_keys(keys) { flags: flags, name: name, name_loc: name_loc, operator_loc: operator_loc, location: location } end
def inspect(NodeInspector inspector) -> String
# File lib/prism/node.rb, line 11523 def inspect(inspector = NodeInspector.new) inspector << inspector.header(self) flags = [("repeated_parameter" if repeated_parameter?)].compact inspector << "├── flags: #{flags.empty? ? "∅" : flags.join(", ")}\n" if (name = self.name).nil? inspector << "├── name: ∅\n" else inspector << "├── name: #{name.inspect}\n" end inspector << "├── name_loc: #{inspector.location(name_loc)}\n" inspector << "└── operator_loc: #{inspector.location(operator_loc)}\n" inspector.to_str end
def operator: () -> String
# File lib/prism/node.rb, line 11518 def operator operator_loc.slice end
attr_reader operator_loc
: Location
# File lib/prism/node.rb, line 11505 def operator_loc location = @operator_loc return location if location.is_a?(Location) @operator_loc = Location.new(source, location >> 32, location & 0xFFFFFFFF) end
def repeated_parameter?: () -> bool
# File lib/prism/node.rb, line 11513 def repeated_parameter? flags.anybits?(ParameterFlags::REPEATED_PARAMETER) end
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 11551 def type :keyword_rest_parameter_node end