class Prism::UnlessNode
Represents the use of the ‘unless` keyword, either in the block form or the modifier form.
bar unless foo ^^^^^^^^^^^^^^ unless foo then bar end ^^^^^^^^^^^^^^^^^^^^^^^
Attributes
The else clause of the unless expression, if present.
unless cond then bar else baz end ^^^^^^^^
The condition to be evaluated for the unless expression. It can be any [non-void expression](github.com/ruby/prism/blob/main/docs/parsing_rules.md#non-void-expression).
unless cond then bar end ^^^^ bar unless cond ^^^^
The body of statements that will executed if the unless condition is falsey. Will be ‘nil` if no body is provided.
unless cond then bar end ^^^
Public Class Methods
Initialize a new UnlessNode
node.
# File lib/prism/node.rb, line 15902 def initialize(source, node_id, location, flags, keyword_loc, predicate, then_keyword_loc, statements, else_clause, end_keyword_loc) @source = source @node_id = node_id @location = location @flags = flags @keyword_loc = keyword_loc @predicate = predicate @then_keyword_loc = then_keyword_loc @statements = statements @else_clause = else_clause @end_keyword_loc = end_keyword_loc end
Return a symbol representation of this node type. See ‘Node::type`.
# File lib/prism/node.rb, line 16045 def self.type :unless_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 lib/prism/node.rb, line 16051 def ===(other) other.is_a?(UnlessNode) && (keyword_loc.nil? == other.keyword_loc.nil?) && (predicate === other.predicate) && (then_keyword_loc.nil? == other.then_keyword_loc.nil?) && (statements === other.statements) && (else_clause === other.else_clause) && (end_keyword_loc.nil? == other.end_keyword_loc.nil?) end
def accept: (Visitor
visitor) -> void
# File lib/prism/node.rb, line 15916 def accept(visitor) visitor.visit_unless_node(self) end
def child_nodes
: () -> Array[nil | Node]
# File lib/prism/node.rb, line 15921 def child_nodes [predicate, statements, else_clause] end
def comment_targets
: () -> Array[Node | Location]
# File lib/prism/node.rb, line 15935 def comment_targets [keyword_loc, predicate, *then_keyword_loc, *statements, *else_clause, *end_keyword_loc] #: Array[Prism::node | Location] end
def compact_child_nodes
: () -> Array
# File lib/prism/node.rb, line 15926 def compact_child_nodes compact = [] #: Array[Prism::node] compact << predicate compact << statements if statements compact << else_clause if else_clause compact end
Returns the else clause of the unless node. This method is deprecated in favor of else_clause
.
# File lib/prism/node_ext.rb, line 503 def consequent deprecated("else_clause") else_clause end
def copy: (?node_id: Integer
, ?location: Location
, ?flags: Integer
, ?keyword_loc: Location
, ?predicate: Prism::node, ?then_keyword_loc: Location
?, ?statements: StatementsNode
?, ?else_clause: ElseNode
?, ?end_keyword_loc: Location
?) -> UnlessNode
# File lib/prism/node.rb, line 15940 def copy(node_id: self.node_id, location: self.location, flags: self.flags, keyword_loc: self.keyword_loc, predicate: self.predicate, then_keyword_loc: self.then_keyword_loc, statements: self.statements, else_clause: self.else_clause, end_keyword_loc: self.end_keyword_loc) UnlessNode.new(source, node_id, location, flags, keyword_loc, predicate, then_keyword_loc, statements, else_clause, end_keyword_loc) end
def deconstruct_keys
: (Array keys) -> { node_id: Integer
, location: Location
, keyword_loc
: Location
, predicate: Prism::node, then_keyword_loc
: Location
?, statements: StatementsNode
?, else_clause
: ElseNode
?, end_keyword_loc
: Location
? }
# File lib/prism/node.rb, line 15948 def deconstruct_keys(keys) { node_id: node_id, location: location, keyword_loc: keyword_loc, predicate: predicate, then_keyword_loc: then_keyword_loc, statements: statements, else_clause: else_clause, end_keyword_loc: end_keyword_loc } end
def end_keyword
: () -> String
?
# File lib/prism/node.rb, line 16030 def end_keyword end_keyword_loc&.slice end
The location of the ‘end` keyword, if present.
unless cond then bar end ^^^
# File lib/prism/node.rb, line 16007 def end_keyword_loc location = @end_keyword_loc case location when nil nil when Location location else @end_keyword_loc = Location.new(source, location >> 32, location & 0xFFFFFFFF) end end
def inspect -> String
# File lib/prism/node.rb, line 16035 def inspect InspectVisitor.compose(self) end
def keyword: () -> String
# File lib/prism/node.rb, line 16020 def keyword keyword_loc.slice end
The location of the ‘unless` keyword.
unless cond then bar end ^^^^^^ bar unless cond ^^^^^^
# File lib/prism/node.rb, line 15959 def keyword_loc location = @keyword_loc return location if location.is_a?(Location) @keyword_loc = Location.new(source, location >> 32, location & 0xFFFFFFFF) end
def then_keyword
: () -> String
?
# File lib/prism/node.rb, line 16025 def then_keyword then_keyword_loc&.slice end
The location of the ‘then` keyword, if present.
unless cond then bar end ^^^^
# File lib/prism/node.rb, line 15978 def then_keyword_loc location = @then_keyword_loc case location when nil nil when Location location else @then_keyword_loc = Location.new(source, location >> 32, location & 0xFFFFFFFF) end end
Return a symbol representation of this node type. See ‘Node#type`.
# File lib/prism/node.rb, line 16040 def type :unless_node end