class Prism::LocalVariableOrWriteNode
Represents the use of the ‘||=` operator for assignment to a local variable.
target ||= value ^^^^^^^^^^^^^^^^
Attributes
attr_reader depth: Integer
attr_reader name: Symbol
attr_reader value: Prism::node
Public Class Methods
def initialize: (Location
name_loc
, Location
operator_loc
, Prism::node value, Symbol
name, Integer
depth, Location
location) -> void
# File lib/prism/node.rb, line 11963 def initialize(source, name_loc, operator_loc, value, name, depth, location) @source = source @newline = false @location = location @name_loc = name_loc @operator_loc = operator_loc @value = value @name = name @depth = depth 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 12072 def self.type :local_variable_or_write_node end
Public Instance Methods
def accept: (Visitor
visitor) -> void
# File lib/prism/node.rb, line 11975 def accept(visitor) visitor.visit_local_variable_or_write_node(self) end
def child_nodes
: () -> Array[nil | Node]
# File lib/prism/node.rb, line 11980 def child_nodes [value] end
def comment_targets
: () -> Array[Node | Location]
# File lib/prism/node.rb, line 11990 def comment_targets [name_loc, operator_loc, value] #: Array[Prism::node | Location] end
def compact_child_nodes
: () -> Array
# File lib/prism/node.rb, line 11985 def compact_child_nodes [value] end
def copy: (?name_loc: Location
, ?operator_loc: Location
, ?value: Prism::node, ?name: Symbol
, ?depth: Integer
, ?location: Location
) -> LocalVariableOrWriteNode
# File lib/prism/node.rb, line 11995 def copy(name_loc: self.name_loc, operator_loc: self.operator_loc, value: self.value, name: self.name, depth: self.depth, location: self.location) LocalVariableOrWriteNode.new(source, name_loc, operator_loc, value, name, depth, location) end
def deconstruct_keys
: (Array keys) -> { name_loc
: Location
, operator_loc
: Location
, value: Prism::node, name: Symbol
, depth: Integer
, location: Location
}
# File lib/prism/node.rb, line 12003 def deconstruct_keys(keys) { name_loc: name_loc, operator_loc: operator_loc, value: value, name: name, depth: depth, location: location } end
def inspect(NodeInspector inspector) -> String
# File lib/prism/node.rb, line 12037 def inspect(inspector = NodeInspector.new) inspector << inspector.header(self) inspector << "├── name_loc: #{inspector.location(name_loc)}\n" inspector << "├── operator_loc: #{inspector.location(operator_loc)}\n" inspector << "├── value:\n" inspector << inspector.child_node(value, "│ ") inspector << "├── name: #{name.inspect}\n" inspector << "└── depth: #{depth.inspect}\n" inspector.to_str end
def operator: () -> String
# File lib/prism/node.rb, line 12032 def operator operator_loc.slice end
attr_reader operator_loc
: Location
# File lib/prism/node.rb, line 12015 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 12062 def type :local_variable_or_write_node end