class Prism::IndexTargetNode
Represents assigning to an index.
foo[bar], = 1 ^^^^^^^^ begin rescue => foo[bar] ^^^^^^^^ end for foo[bar] in baz do end ^^^^^^^^
Attributes
attr_reader arguments: ArgumentsNode
?
attr_reader block: Node
?
attr_reader closing_loc
: Location
attr_reader opening_loc
: Location
attr_reader receiver: Node
Public Class Methods
def initialize: (flags: Integer, receiver: Node
, opening_loc
: Location
, arguments: ArgumentsNode
?, closing_loc
: Location
, block: Node
?, location: Location
) -> void
# File prism/node.rb, line 8855 def initialize(flags, receiver, opening_loc, arguments, closing_loc, block, location) @flags = flags @receiver = receiver @opening_loc = opening_loc @arguments = arguments @closing_loc = closing_loc @block = block @location = location 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 prism/node.rb, line 8983 def self.type :index_target_node end
Public Instance Methods
def accept: (visitor: Visitor
) -> void
# File prism/node.rb, line 8866 def accept(visitor) visitor.visit_index_target_node(self) end
def attribute_write?: () -> bool
# File prism/node.rb, line 8921 def attribute_write? flags.anybits?(CallNodeFlags::ATTRIBUTE_WRITE) end
def child_nodes
: () -> Array[nil | Node]
# File prism/node.rb, line 8871 def child_nodes [receiver, arguments, block] end
def closing: () -> String
# File prism/node.rb, line 8931 def closing closing_loc.slice end
def comment_targets
: () -> Array[Node | Location]
# File prism/node.rb, line 8885 def comment_targets [receiver, opening_loc, *arguments, closing_loc, *block] end
def compact_child_nodes
: () -> Array
# File prism/node.rb, line 8876 def compact_child_nodes compact = [] compact << receiver compact << arguments if arguments compact << block if block compact end
def copy: (**params) -> IndexTargetNode
# File prism/node.rb, line 8890 def copy(**params) IndexTargetNode.new( params.fetch(:flags) { flags }, params.fetch(:receiver) { receiver }, params.fetch(:opening_loc) { opening_loc }, params.fetch(:arguments) { arguments }, params.fetch(:closing_loc) { closing_loc }, params.fetch(:block) { block }, params.fetch(:location) { location }, ) end
def deconstruct_keys
: (keys: Array) -> Hash[Symbol, nil | Node
| Array | String | Token
| Array | Location]
# File prism/node.rb, line 8906 def deconstruct_keys(keys) { flags: flags, receiver: receiver, opening_loc: opening_loc, arguments: arguments, closing_loc: closing_loc, block: block, location: location } end
def inspect(inspector: NodeInspector) -> String
# File prism/node.rb, line 8936 def inspect(inspector = NodeInspector.new) inspector << inspector.header(self) flags = [("safe_navigation" if safe_navigation?), ("variable_call" if variable_call?), ("attribute_write" if attribute_write?)].compact inspector << "├── flags: #{flags.empty? ? "∅" : flags.join(", ")}\n" inspector << "├── receiver:\n" inspector << inspector.child_node(receiver, "│ ") inspector << "├── opening_loc: #{inspector.location(opening_loc)}\n" if (arguments = self.arguments).nil? inspector << "├── arguments: ∅\n" else inspector << "├── arguments:\n" inspector << arguments.inspect(inspector.child_inspector("│ ")).delete_prefix(inspector.prefix) end inspector << "├── closing_loc: #{inspector.location(closing_loc)}\n" if (block = self.block).nil? inspector << "└── block: ∅\n" else inspector << "└── block:\n" inspector << block.inspect(inspector.child_inspector(" ")).delete_prefix(inspector.prefix) end inspector.to_str end
def opening: () -> String
# File prism/node.rb, line 8926 def opening opening_loc.slice 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 prism/node.rb, line 8973 def type :index_target_node end
def variable_call?: () -> bool
# File prism/node.rb, line 8916 def variable_call? flags.anybits?(CallNodeFlags::VARIABLE_CALL) end