class Prism::ParenthesesNode
Represents a parenthesized expression
(10 + 34) ^^^^^^^^^
Attributes
attr_reader body: Prism::node?
Public Class Methods
def initialize: (Prism::node? body, Location
opening_loc
, Location
closing_loc
, Location
location) -> void
# File lib/prism/node.rb, line 14406 def initialize(source, body, opening_loc, closing_loc, location) @source = source @newline = false @location = location @body = body @opening_loc = opening_loc @closing_loc = closing_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 14520 def self.type :parentheses_node end
Public Instance Methods
def accept: (Visitor
visitor) -> void
# File lib/prism/node.rb, line 14416 def accept(visitor) visitor.visit_parentheses_node(self) end
def child_nodes
: () -> Array[nil | Node]
# File lib/prism/node.rb, line 14425 def child_nodes [body] end
def closing: () -> String
# File lib/prism/node.rb, line 14478 def closing closing_loc.slice end
attr_reader closing_loc
: Location
# File lib/prism/node.rb, line 14465 def closing_loc location = @closing_loc return location if location.is_a?(Location) @closing_loc = Location.new(source, location >> 32, location & 0xFFFFFFFF) end
def comment_targets
: () -> Array[Node | Location]
# File lib/prism/node.rb, line 14437 def comment_targets [*body, opening_loc, closing_loc] #: Array[Prism::node | Location] end
def compact_child_nodes
: () -> Array
# File lib/prism/node.rb, line 14430 def compact_child_nodes compact = [] #: Array[Prism::node] compact << body if body compact end
def copy: (?body: Prism::node?, ?opening_loc: Location
, ?closing_loc: Location
, ?location: Location
) -> ParenthesesNode
# File lib/prism/node.rb, line 14442 def copy(body: self.body, opening_loc: self.opening_loc, closing_loc: self.closing_loc, location: self.location) ParenthesesNode.new(source, body, opening_loc, closing_loc, location) end
def deconstruct_keys
: (Array keys) -> { body: Prism::node?, opening_loc
: Location
, closing_loc
: Location
, location: Location
}
# File lib/prism/node.rb, line 14450 def deconstruct_keys(keys) { body: body, opening_loc: opening_loc, closing_loc: closing_loc, location: location } end
def inspect(NodeInspector inspector) -> String
# File lib/prism/node.rb, line 14483 def inspect(inspector = NodeInspector.new) inspector << inspector.header(self) if (body = self.body).nil? inspector << "├── body: ∅\n" else inspector << "├── body:\n" inspector << body.inspect(inspector.child_inspector("│ ")).delete_prefix(inspector.prefix) end inspector << "├── opening_loc: #{inspector.location(opening_loc)}\n" inspector << "└── closing_loc: #{inspector.location(closing_loc)}\n" inspector.to_str end
def opening: () -> String
# File lib/prism/node.rb, line 14473 def opening opening_loc.slice end
attr_reader opening_loc
: Location
# File lib/prism/node.rb, line 14458 def opening_loc location = @opening_loc return location if location.is_a?(Location) @opening_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 14510 def type :parentheses_node end