class Prism::ImaginaryNode
Represents an imaginary number literal.
1.0i ^^^^
Attributes
attr_reader numeric: FloatNode
| IntegerNode
| RationalNode
Public Class Methods
def initialize: (FloatNode
| IntegerNode
| RationalNode
numeric, Location
location) -> void
# File prism/node.rb, line 8681 def initialize(source, numeric, location) @source = source @location = location @numeric = numeric 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 8752 def self.type :imaginary_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 8758 def ===(other) other.is_a?(ImaginaryNode) && (numeric === other.numeric) end
def accept: (Visitor
visitor) -> void
# File prism/node.rb, line 8688 def accept(visitor) visitor.visit_imaginary_node(self) end
def child_nodes
: () -> Array[nil | Node]
# File prism/node.rb, line 8693 def child_nodes [numeric] end
def comment_targets
: () -> Array[Node | Location]
# File prism/node.rb, line 8703 def comment_targets [numeric] #: Array[Prism::node | Location] end
def compact_child_nodes
: () -> Array
# File prism/node.rb, line 8698 def compact_child_nodes [numeric] end
def copy: (?numeric: FloatNode
| IntegerNode
| RationalNode
, ?location: Location
) -> ImaginaryNode
# File prism/node.rb, line 8708 def copy(numeric: self.numeric, location: self.location) ImaginaryNode.new(source, numeric, location) end
def deconstruct_keys
: (Array keys) -> { numeric: FloatNode
| IntegerNode
| RationalNode
, location: Location
}
# File prism/node.rb, line 8716 def deconstruct_keys(keys) { numeric: numeric, location: location } end
def inspect -> String
# File prism/node.rb, line 8724 def inspect InspectVisitor.compose(self) 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 8742 def type :imaginary_node end
Returns the value of the node as a Ruby Complex.
# File prism/node_ext.rb, line 98 def value Complex(0, numeric.value) end