class Prism::MultiWriteNode
^^^^^^^^^^^^^^^^^
a, b, c = 1, 2, 3
Represents a write to a multi-target expression.
def self.type
class, but should be faster in a case statement or an array comparison.
Note that like #type, it will still be slower than using == for a single
splitting on the type of the node without having to do a long === chain.
Similar to #type, this method returns a symbol that you can use for
def self.type :multi_write_node end
def accept(visitor)
def accept(visitor) visitor.visit_multi_write_node(self) end
def child_nodes
def child_nodes [*lefts, rest, *rights, value] end
def comment_targets
def comment_targets [*lefts, *rest, *rights, *lparen_loc, *rparen_loc, operator_loc, value] end
def compact_child_nodes
def compact_child_nodes compact = [] compact.concat(lefts) compact << rest if rest compact.concat(rights) compact << value compact end
def copy(**params)
def copy(**params) MultiWriteNode.new( params.fetch(:lefts) { lefts }, params.fetch(:rest) { rest }, params.fetch(:rights) { rights }, params.fetch(:lparen_loc) { lparen_loc }, params.fetch(:rparen_loc) { rparen_loc }, params.fetch(:operator_loc) { operator_loc }, params.fetch(:value) { value }, params.fetch(:location) { location }, ) end
def deconstruct_keys(keys)
def deconstruct_keys(keys) { lefts: lefts, rest: rest, rights: rights, lparen_loc: lparen_loc, rparen_loc: rparen_loc, operator_loc: operator_loc, value: value, location: location } end
def initialize(lefts, rest, rights, lparen_loc, rparen_loc, operator_loc, value, location)
def initialize(lefts, rest, rights, lparen_loc, rparen_loc, operator_loc, value, location) @newline = false @lefts = lefts @rest = rest @rights = rights @lparen_loc = lparen_loc @rparen_loc = rparen_loc @operator_loc = operator_loc @value = value @location = location end
def inspect(inspector = NodeInspector.new)
def inspect(inspector = NodeInspector.new) inspector << inspector.header(self) inspector << "├── lefts: #{inspector.list("#{inspector.prefix}│ ", lefts)}" if (rest = self.rest).nil? inspector << "├── rest: ∅\n" else inspector << "├── rest:\n" inspector << rest.inspect(inspector.child_inspector("│ ")).delete_prefix(inspector.prefix) end inspector << "├── rights: #{inspector.list("#{inspector.prefix}│ ", rights)}" inspector << "├── lparen_loc: #{inspector.location(lparen_loc)}\n" inspector << "├── rparen_loc: #{inspector.location(rparen_loc)}\n" inspector << "├── operator_loc: #{inspector.location(operator_loc)}\n" inspector << "└── value:\n" inspector << inspector.child_node(value, " ") inspector.to_str end
def lparen
def lparen lparen_loc&.slice end
def operator
def operator operator_loc.slice end
def rparen
def rparen rparen_loc&.slice end
def type
keys will use a jump table.
you can take advantage of the fact that case statements with all symbol
it uses a single integer comparison, but also because if you're on CRuby
can use for comparison. This is faster than the other approaches because
Instead, you can call #type, which will return to you a symbol that you
method calls, and/or array allocations.
these approaches are relatively slow because of the constant lookups,
case statement and doing `case node; when cls1; when cls2; end`. Both of
calling `[cls1, cls2].include?(node.class)` or putting the node into a
classes to see what kind of behavior to perform. Usually this is done by
Sometimes you want to check an instance of a node against a list of
def type :multi_write_node end