class Prism::StatementsNode
Represents a set of statements contained within some scope.
foo; bar; baz ^^^^^^^^^^^^^
Attributes
attr_reader body: Array
Public Class Methods
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 15849 def self.type :statements_node end
Public Instance Methods
def accept: (visitor: Visitor
) -> void
# File prism/node.rb, line 15783 def accept(visitor) visitor.visit_statements_node(self) end
def child_nodes
: () -> Array[nil | Node]
# File prism/node.rb, line 15788 def child_nodes [*body] end
def comment_targets
: () -> Array[Node | Location]
# File prism/node.rb, line 15798 def comment_targets [*body] end
def compact_child_nodes
: () -> Array
# File prism/node.rb, line 15793 def compact_child_nodes [*body] end
def copy: (**params) -> StatementsNode
# File prism/node.rb, line 15803 def copy(**params) StatementsNode.new( params.fetch(:body) { body }, params.fetch(:location) { location }, ) end
def inspect(inspector: NodeInspector) -> String
# File prism/node.rb, line 15819 def inspect(inspector = NodeInspector.new) inspector << inspector.header(self) inspector << "└── body: #{inspector.list("#{inspector.prefix} ", body)}" inspector.to_str 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 15839 def type :statements_node end