Represents an expression modified with a rescue.
foo rescue nil ^^^^^^^^^^^^^^
attr_reader expression: Prism::node
attr_reader rescue_expression: Prism::node
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 15998
def initialize(source, expression, keyword_loc, rescue_expression, location)
@source = source
@location = location
@expression = expression
@keyword_loc = keyword_loc
@rescue_expression = rescue_expression
end
def initialize: (Prism::node expression, Location keyword_loc, Prism::node rescue_expression, Location location) -> void
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 16086
def self.type
:rescue_modifier_node
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 tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 16092
def ===(other)
other.is_a?(RescueModifierNode) &&
(expression === other.expression) &&
(keyword_loc.nil? == other.keyword_loc.nil?) &&
(rescue_expression === other.rescue_expression)
end
Implements case-equality for the node. This is effectively == but without comparing the value of locations. Locations are checked only for presence.
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 16007
def accept(visitor)
visitor.visit_rescue_modifier_node(self)
end
def accept: (Visitor visitor) -> void
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 16012
def child_nodes
[expression, rescue_expression]
end
def child_nodes: () -> Array[nil | Node]
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 16022
def comment_targets
[expression, keyword_loc, rescue_expression] #: Array[Prism::node | Location]
end
def comment_targets: () -> Array[Node | Location]
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 16017
def compact_child_nodes
[expression, rescue_expression]
end
def compact_child_nodes: () -> Array
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 16027
def copy(expression: self.expression, keyword_loc: self.keyword_loc, rescue_expression: self.rescue_expression, location: self.location)
RescueModifierNode.new(source, expression, keyword_loc, rescue_expression, location)
end
def copy: (?expression: Prism::node, ?keyword_loc: Location, ?rescue_expression: Prism::node, ?location: Location) -> RescueModifierNode
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 16035
def deconstruct_keys(keys)
{ expression: expression, keyword_loc: keyword_loc, rescue_expression: rescue_expression, location: location }
end
def deconstruct_keys: (Array keys) -> { expression: Prism::node, keyword_loc: Location, rescue_expression: Prism::node, location: Location }
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 16058
def inspect
InspectVisitor.compose(self)
end
def inspect -> String
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 16053
def keyword
keyword_loc.slice
end
def keyword: () -> String
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 16043
def keyword_loc
location = @keyword_loc
return location if location.is_a?(Location)
@keyword_loc = Location.new(source, location >> 32, location & 0xFFFFFFFF)
end
attr_reader keyword_loc: Location
# File tmp/rubies/ruby-3.4.0-preview1/lib/prism/node.rb, line 16076
def type
:rescue_modifier_node
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