class Prism::ClassVariableOperatorWriteNode
Represents assigning to a class variable using an operator that isn’t ‘=`.
@@target += value ^^^^^^^^^^^^^^^^^
Attributes
attr_reader name: Symbol
attr_reader operator: Symbol
attr_reader value: Prism::node
Public Class Methods
def initialize: (Symbol
name, Location
name_loc
, Location
operator_loc
, Prism::node value, Symbol
operator, Location
location) -> void
# File lib/prism/node.rb, line 3913 def initialize(source, name, name_loc, operator_loc, value, operator, location) @source = source @newline = false @location = location @name = name @name_loc = name_loc @operator_loc = operator_loc @value = value @operator = operator 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 4009 def self.type :class_variable_operator_write_node end
Public Instance Methods
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 4015 def ===(other) other.is_a?(ClassVariableOperatorWriteNode) && (name === other.name) && (name_loc.nil? == other.name_loc.nil?) && (operator_loc.nil? == other.operator_loc.nil?) && (value === other.value) && (operator === other.operator) end
def accept: (Visitor
visitor) -> void
# File lib/prism/node.rb, line 3925 def accept(visitor) visitor.visit_class_variable_operator_write_node(self) end
def child_nodes
: () -> Array[nil | Node]
# File lib/prism/node.rb, line 3930 def child_nodes [value] end
def comment_targets
: () -> Array[Node | Location]
# File lib/prism/node.rb, line 3940 def comment_targets [name_loc, operator_loc, value] #: Array[Prism::node | Location] end
def compact_child_nodes
: () -> Array
# File lib/prism/node.rb, line 3935 def compact_child_nodes [value] end
def copy: (?name: Symbol
, ?name_loc: Location
, ?operator_loc: Location
, ?value: Prism::node, ?operator: Symbol
, ?location: Location
) -> ClassVariableOperatorWriteNode
# File lib/prism/node.rb, line 3945 def copy(name: self.name, name_loc: self.name_loc, operator_loc: self.operator_loc, value: self.value, operator: self.operator, location: self.location) ClassVariableOperatorWriteNode.new(source, name, name_loc, operator_loc, value, operator, location) end
def deconstruct_keys
: (Array keys) -> { name: Symbol
, name_loc
: Location
, operator_loc
: Location
, value: Prism::node, operator: Symbol
, location: Location
}
# File lib/prism/node.rb, line 3953 def deconstruct_keys(keys) { name: name, name_loc: name_loc, operator_loc: operator_loc, value: value, operator: operator, location: location } end
def inspect -> String
# File lib/prism/node.rb, line 3981 def inspect InspectVisitor.compose(self) end
attr_reader operator_loc
: Location
# File lib/prism/node.rb, line 3968 def operator_loc location = @operator_loc return location if location.is_a?(Location) @operator_loc = Location.new(source, location >> 32, location & 0xFFFFFFFF) 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 3999 def type :class_variable_operator_write_node end