Represents accessing a constant through a path of ‘::` operators.
Foo::Bar ^^^^^^^^
attr_reader delimiter_loc: Location
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 4419
def initialize(parent, child, delimiter_loc, location)
@parent = parent
@child = child
@delimiter_loc = delimiter_loc
@location = location
end
def initialize: (parent: Node?, child: Node, delimiter_loc: Location, location: Location) -> void
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 4511
def self.type
:constant_path_node
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 tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 4427
def accept(visitor)
visitor.visit_constant_path_node(self)
end
def accept: (visitor: Visitor) -> void
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 4432
def child_nodes
[parent, child]
end
def child_nodes: () -> Array[nil | Node]
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 4445
def comment_targets
[*parent, child, delimiter_loc]
end
def comment_targets: () -> Array[Node | Location]
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 4437
def compact_child_nodes
compact = []
compact << parent if parent
compact << child
compact
end
def compact_child_nodes: () -> Array
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 4450
def copy(**params)
ConstantPathNode.new(
params.fetch(:parent) { parent },
params.fetch(:child) { child },
params.fetch(:delimiter_loc) { delimiter_loc },
params.fetch(:location) { location },
)
end
def copy: (**params) -> ConstantPathNode
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 4463
def deconstruct_keys(keys)
{ parent: parent, child: child, delimiter_loc: delimiter_loc, location: location }
end
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 4468
def delimiter
delimiter_loc.slice
end
def delimiter: () -> String
# File tmp/rubies/ruby-3.3.0/lib/prism/node_ext.rb, line 129
def full_name
full_name_parts.join("::")
end
Returns the full name of this constant path. For example: “Foo::Bar”
# File tmp/rubies/ruby-3.3.0/lib/prism/node_ext.rb, line 112
def full_name_parts
parts = [child.name]
current = parent
while current.is_a?(ConstantPathNode)
parts.unshift(current.child.name)
current = current.parent
end
unless current.is_a?(ConstantReadNode)
raise DynamicPartsInConstantPathError, "Constant path contains dynamic parts. Cannot compute full name"
end
parts.unshift(current&.name || :"")
end
Returns the list of parts for the full name of this constant path. For example: [:Foo, :Bar]
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 4473
def inspect(inspector = NodeInspector.new)
inspector << inspector.header(self)
if (parent = self.parent).nil?
inspector << "├── parent: ∅\n"
else
inspector << "├── parent:\n"
inspector << parent.inspect(inspector.child_inspector("│ ")).delete_prefix(inspector.prefix)
end
inspector << "├── child:\n"
inspector << inspector.child_node(child, "│ ")
inspector << "└── delimiter_loc: #{inspector.location(delimiter_loc)}\n"
inspector.to_str
end
def inspect(inspector: NodeInspector) -> String
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 4501
def type
:constant_path_node
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