Class: Prism::RationalNode
Relationships & Source Files | |
Super Chains via Extension / Inclusion / Inheritance | |
Class Chain:
self,
Node
|
|
Instance Chain:
self,
Node
|
|
Inherits: |
Prism::Node
|
Defined in: | lib/prism/node.rb, lib/prism/node_ext.rb |
Overview
Represents a rational number literal.
1.0r
^^^^
Class Method Summary
- .new(numeric, location) ⇒ RationalNode constructor
-
.type
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.
Instance Attribute Summary
Node
- Inherited
Instance Method Summary
-
#accept(visitor)
def accept: (visitor:
Visitor
) -> void. -
#child_nodes
(also: #deconstruct)
def child_nodes: () -> Array[nil | Node].
-
#comment_targets
def comment_targets: () -> Array[Node | Location].
-
#compact_child_nodes
def compact_child_nodes: () -> Array.
-
#copy(**params)
def copy: (**params) ->
RationalNode
. -
#deconstruct
Alias for #child_nodes.
- #deconstruct_keys(keys)
-
#inspect(inspector = NodeInspector.new)
def inspect(inspector: NodeInspector) -> String.
-
#type
Sometimes you want to check an instance of a node against a list of classes to see what kind of behavior to perform.
-
#value
Returns the value of the node as a Ruby Rational.
Node
- Inherited
#pretty_print | Similar to inspect, but respects the current level of indentation given by the pretty print object. |
#slice | Slice the location of the node from the source. |
#to_dot | Convert this node into a graphviz dot graph string. |
#deprecated, #newline!, #set_newline_flag |
Constructor Details
.new(numeric, location) ⇒ RationalNode
[ GitHub ]
Class Method Details
.type
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 'lib/prism/node.rb', line 14199
def self.type :rational_node end
Instance Attribute Details
#numeric (readonly)
attr_reader numeric: Node
# File 'lib/prism/node.rb', line 14123
attr_reader :numeric
Instance Method Details
#accept(visitor)
def accept: (visitor: Visitor
) -> void
# File 'lib/prism/node.rb', line 14132
def accept(visitor) visitor.visit_rational_node(self) end
#child_nodes Also known as: #deconstruct
def child_nodes: () -> Array[nil | Node]
# File 'lib/prism/node.rb', line 14137
def child_nodes [numeric] end
#comment_targets
def comment_targets: () -> Array[Node | Location]
# File 'lib/prism/node.rb', line 14147
def comment_targets [numeric] end
#compact_child_nodes
def compact_child_nodes: () -> Array
# File 'lib/prism/node.rb', line 14142
def compact_child_nodes [numeric] end
#copy(**params)
def copy: (**params) -> RationalNode
#deconstruct
Alias for #child_nodes.
# File 'lib/prism/node.rb', line 14160
alias deconstruct child_nodes
#deconstruct_keys(keys)
# File 'lib/prism/node.rb', line 14163
def deconstruct_keys(keys) { numeric: numeric, location: location } end
#inspect(inspector = NodeInspector.new)
def inspect(inspector: NodeInspector) -> String
#type
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 'lib/prism/node.rb', line 14189
def type :rational_node end
#value
Returns the value of the node as a Ruby Rational.
# File 'lib/prism/node_ext.rb', line 105
def value Rational(numeric.is_a?(IntegerNode) ? numeric.value : slice.chomp("r")) end