Represents the use of the ‘alias` keyword to alias a method.
alias foo bar ^^^^^^^^^^^^^
attr_reader keyword_loc: Location
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 168
def initialize(new_name, old_name, keyword_loc, location)
@new_name = new_name
@old_name = old_name
@keyword_loc = keyword_loc
@location = location
end
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 253
def self.type
:alias_method_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 176
def accept(visitor)
visitor.visit_alias_method_node(self)
end
def accept: (visitor: Visitor) -> void
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 181
def child_nodes
[new_name, old_name]
end
def child_nodes: () -> Array[nil | Node]
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 191
def comment_targets
[new_name, old_name, keyword_loc]
end
def comment_targets: () -> Array[Node | Location]
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 186
def compact_child_nodes
[new_name, old_name]
end
def compact_child_nodes: () -> Array
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 196
def copy(**params)
AliasMethodNode.new(
params.fetch(:new_name) { new_name },
params.fetch(:old_name) { old_name },
params.fetch(:keyword_loc) { keyword_loc },
params.fetch(:location) { location },
)
end
def copy: (**params) -> AliasMethodNode
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 209
def deconstruct_keys(keys)
{ new_name: new_name, old_name: old_name, keyword_loc: keyword_loc, location: location }
end
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 219
def inspect(inspector = NodeInspector.new)
inspector << inspector.header(self)
inspector << "├── new_name:\n"
inspector << inspector.child_node(new_name, "│ ")
inspector << "├── old_name:\n"
inspector << inspector.child_node(old_name, "│ ")
inspector << "└── keyword_loc: #{inspector.location(keyword_loc)}\n"
inspector.to_str
end
def inspect(inspector: NodeInspector) -> String
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 214
def keyword
keyword_loc.slice
end
def keyword: () -> String
# File tmp/rubies/ruby-3.3.0/lib/prism/node.rb, line 243
def type
:alias_method_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