class Prism::ShareableConstantNode
This node wraps a constant write to indicate that when the value is written, it should have its shareability state modified.
# shareable_constant_value: literal C = { a: 1 } ^^^^^^^^^^^^
Attributes
protected attr_reader flags: Integer
The constant write that should be modified with the shareability state.
Public Class Methods
def initialize: (Integer flags, ConstantWriteNode
| ConstantAndWriteNode
| ConstantOrWriteNode
| ConstantOperatorWriteNode
| ConstantPathWriteNode
| ConstantPathAndWriteNode
| ConstantPathOrWriteNode
| ConstantPathOperatorWriteNode
write, Location
location) -> void
# File prism/node.rb, line 16670 def initialize(source, flags, write, location) @source = source @location = location @flags = flags @write = write 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 prism/node.rb, line 16761 def self.type :shareable_constant_node end
Public Instance Methods
Implements case-equality for the node. This is effectively == but without comparing the value of locations. Locations are checked only for presence.
# File prism/node.rb, line 16767 def ===(other) other.is_a?(ShareableConstantNode) && (flags === other.flags) && (write === other.write) end
def accept: (Visitor
visitor) -> void
# File prism/node.rb, line 16678 def accept(visitor) visitor.visit_shareable_constant_node(self) end
def child_nodes
: () -> Array[nil | Node]
# File prism/node.rb, line 16683 def child_nodes [write] end
def comment_targets
: () -> Array[Node | Location]
# File prism/node.rb, line 16693 def comment_targets [write] #: Array[Prism::node | Location] end
def compact_child_nodes
: () -> Array
# File prism/node.rb, line 16688 def compact_child_nodes [write] end
def copy: (?flags: Integer, ?write: ConstantWriteNode
| ConstantAndWriteNode
| ConstantOrWriteNode
| ConstantOperatorWriteNode
| ConstantPathWriteNode
| ConstantPathAndWriteNode
| ConstantPathOrWriteNode
| ConstantPathOperatorWriteNode
, ?location: Location
) -> ShareableConstantNode
# File prism/node.rb, line 16698 def copy(flags: self.flags, write: self.write, location: self.location) ShareableConstantNode.new(source, flags, write, location) end
def deconstruct_keys
: (Array keys) -> { flags: Integer, write: ConstantWriteNode
| ConstantAndWriteNode
| ConstantOrWriteNode
| ConstantOperatorWriteNode
| ConstantPathWriteNode
| ConstantPathAndWriteNode
| ConstantPathOrWriteNode
| ConstantPathOperatorWriteNode
, location: Location
}
# File prism/node.rb, line 16706 def deconstruct_keys(keys) { flags: flags, write: write, location: location } end
def experimental_copy?: () -> bool
# File prism/node.rb, line 16728 def experimental_copy? flags.anybits?(ShareableConstantNodeFlags::EXPERIMENTAL_COPY) end
def experimental_everything?: () -> bool
# File prism/node.rb, line 16723 def experimental_everything? flags.anybits?(ShareableConstantNodeFlags::EXPERIMENTAL_EVERYTHING) end
def inspect -> String
# File prism/node.rb, line 16733 def inspect InspectVisitor.compose(self) end
def literal?: () -> bool
# File prism/node.rb, line 16718 def literal? flags.anybits?(ShareableConstantNodeFlags::LITERAL) 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 16751 def type :shareable_constant_node end