class Prism::AssocSplatNode
Represents a splat in a hash literal.
{ **foo } ^^^^^
Attributes
The value to be splatted, if present. Will be missing when keyword rest argument forwarding is used.
{ **foo } ^^^
Public Class Methods
def initialize: (Prism::node? value, Location
operator_loc
, Location
location) -> void
# File lib/prism/node.rb, line 1099 def initialize(source, value, operator_loc, location) @source = source @newline = false @location = location @value = value @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 1201 def self.type :assoc_splat_node end
Public Instance Methods
def accept: (Visitor
visitor) -> void
# File lib/prism/node.rb, line 1108 def accept(visitor) visitor.visit_assoc_splat_node(self) end
def child_nodes
: () -> Array[nil | Node]
# File lib/prism/node.rb, line 1113 def child_nodes [value] end
def comment_targets
: () -> Array[Node | Location]
# File lib/prism/node.rb, line 1125 def comment_targets [*value, operator_loc] #: Array[Prism::node | Location] end
def compact_child_nodes
: () -> Array
# File lib/prism/node.rb, line 1118 def compact_child_nodes compact = [] #: Array[Prism::node] compact << value if value compact end
def copy: (?value: Prism::node?, ?operator_loc: Location
, ?location: Location
) -> AssocSplatNode
# File lib/prism/node.rb, line 1130 def copy(value: self.value, operator_loc: self.operator_loc, location: self.location) AssocSplatNode.new(source, value, operator_loc, location) end
def deconstruct_keys
: (Array keys) -> { value: Prism::node?, operator_loc
: Location
, location: Location
}
# File lib/prism/node.rb, line 1138 def deconstruct_keys(keys) { value: value, operator_loc: operator_loc, location: location } end
def inspect(NodeInspector inspector) -> String
# File lib/prism/node.rb, line 1165 def inspect(inspector = NodeInspector.new) inspector << inspector.header(self) if (value = self.value).nil? inspector << "├── value: ∅\n" else inspector << "├── value:\n" inspector << value.inspect(inspector.child_inspector("│ ")).delete_prefix(inspector.prefix) end inspector << "└── operator_loc: #{inspector.location(operator_loc)}\n" inspector.to_str end
def operator: () -> String
# File lib/prism/node.rb, line 1160 def operator operator_loc.slice end
The location of the ‘**` operator.
{ **x } ^^
# File lib/prism/node.rb, line 1152 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 1191 def type :assoc_splat_node end