Represents a required parameter to a method, block, or lambda definition.
def a(b)
^
end
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 15898
def initialize(source, flags, name, location)
@source = source
@location = location
@flags = flags
@name = name
end
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 15979
def self.type
:required_parameter_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-3.4.0-preview1/lib/prism/node.rb, line 15985
def ===(other)
other.is_a?(RequiredParameterNode) &&
(flags === other.flags) &&
(name === other.name)
end
Implements case-equality for the node. This is effectively == but without comparing the value of locations. Locations are checked only for presence.
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 15906
def accept(visitor)
visitor.visit_required_parameter_node(self)
end
def accept: (Visitor visitor) -> void
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 15911
def child_nodes
[]
end
def child_nodes: () -> Array[nil | Node]
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 15921
def comment_targets
[] #: Array[Prism::node | Location]
end
def comment_targets: () -> Array[Node | Location]
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 15916
def compact_child_nodes
[]
end
def compact_child_nodes: () -> Array
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 15926
def copy(flags: self.flags, name: self.name, location: self.location)
RequiredParameterNode.new(source, flags, name, location)
end
def copy: (?flags: Integer, ?name: Symbol, ?location: Location) -> RequiredParameterNode
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 15934
def deconstruct_keys(keys)
{ flags: flags, name: name, location: location }
end
def deconstruct_keys: (Array keys) -> { flags: Integer, name: Symbol, location: Location }
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 15951
def inspect
InspectVisitor.compose(self)
end
def inspect -> String
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 15946
def repeated_parameter?
flags.anybits?(ParameterFlags::REPEATED_PARAMETER)
end
def repeated_parameter?: () -> bool
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 15969
def type
:required_parameter_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