Class: Prism::IfNode

Inherits:
PrismNode
  • Object
show all
Defined in:
lib/prism/node.rb,
lib/prism/node_ext.rb,
lib/prism/parse_result/newlines.rb,
ext/prism/api_node.c

Overview

Represents the use of the ‘if` keyword, either in the block form or the modifier form, or a ternary expression.

bar if foo
^^^^^^^^^^

if foo then bar end
^^^^^^^^^^^^^^^^^^^

foo ? bar : baz
^^^^^^^^^^^^^^^

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(source, node_id, location, flags, if_keyword_loc, predicate, then_keyword_loc, statements, subsequent, end_keyword_loc) ⇒ IfNode

Initialize a new IfNode node.



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# File 'lib/prism/node.rb', line 7445

def initialize(source, node_id, location, flags, if_keyword_loc, predicate, then_keyword_loc, statements, subsequent, end_keyword_loc)
  @source = source
  @node_id = node_id
  @location = location
  @flags = flags
  @if_keyword_loc = if_keyword_loc
  @predicate = predicate
  @then_keyword_loc = then_keyword_loc
  @statements = statements
  @subsequent = subsequent
  @end_keyword_loc = end_keyword_loc
end

Instance Attribute Details

#predicate ⇒ Object (readonly)

The node for the condition the ‘IfNode` is testing.

if foo
   ^^^
  bar
end

bar if foo
       ^^^

foo ? bar : baz
^^^



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# File 'lib/prism/node.rb', line 7525

def predicate
  @predicate
end

#statements ⇒ Object (readonly)

Represents the body of statements that will be executed when the predicate is evaluated as truthy. Will be ‘nil` when no body is provided.

if foo
  bar
  ^^^
  baz
  ^^^
end



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# File 'lib/prism/node.rb', line 7554

def statements
  @statements
end

#subsequent ⇒ Object (readonly)

Represents an ‘ElseNode` or an `IfNode` when there is an `else` or an `elsif` in the `if` statement.

if foo
  bar
elsif baz
^^^^^^^^^
  qux
  ^^^
end
^^^

if foo then bar else baz end
                ^^^^^^^^^^^^



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# File 'lib/prism/node.rb', line 7569

def subsequent
  @subsequent
end

Class Method Details

.type ⇒ Object

Return a symbol representation of this node type. See ‘Node::type`.



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# File 'lib/prism/node.rb', line 7615

def self.type
  :if_node
end

Instance Method Details

#===(other) ⇒ Object

Implements case-equality for the node. This is effectively == but without comparing the value of locations. Locations are checked only for presence.



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# File 'lib/prism/node.rb', line 7621

def ===(other)
  other.is_a?(IfNode) &&
    (if_keyword_loc.nil? == other.if_keyword_loc.nil?) &&
    (predicate === other.predicate) &&
    (then_keyword_loc.nil? == other.then_keyword_loc.nil?) &&
    (statements === other.statements) &&
    (subsequent === other.subsequent) &&
    (end_keyword_loc.nil? == other.end_keyword_loc.nil?)
end

#accept(visitor) ⇒ Object

def accept: (Visitor visitor) -> void



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# File 'lib/prism/node.rb', line 7459

def accept(visitor)
  visitor.visit_if_node(self)
end

#child_nodes ⇒ Object Also known as: deconstruct

def child_nodes: () -> Array[nil | Node]



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# File 'lib/prism/node.rb', line 7464

def child_nodes
  [predicate, statements, subsequent]
end

#comment_targets ⇒ Object

def comment_targets: () -> Array[Node | Location]



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# File 'lib/prism/node.rb', line 7478

def comment_targets
  [*if_keyword_loc, predicate, *then_keyword_loc, *statements, *subsequent, *end_keyword_loc] #: Array[Prism::node | Location]
end

#compact_child_nodes ⇒ Object

def compact_child_nodes: () -> Array



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# File 'lib/prism/node.rb', line 7469

def compact_child_nodes
  compact = [] #: Array[Prism::node]
  compact << predicate
  compact << statements if statements
  compact << subsequent if subsequent
  compact
end

#consequent ⇒ Object

Returns the subsequent if/elsif/else clause of the if node. This method is deprecated in favor of #subsequent.



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# File 'lib/prism/node_ext.rb', line 485

def consequent
  deprecated("subsequent")
  subsequent
end

#copy(node_id: self.node_id, location: self.location, flags: self.flags, if_keyword_loc: self.if_keyword_loc, predicate: self.predicate, then_keyword_loc: self.then_keyword_loc, statements: self.statements, subsequent: self.subsequent, end_keyword_loc: self.end_keyword_loc) ⇒ Object

def copy: (?node_id: Integer, ?location: Location, ?flags: Integer, ?if_keyword_loc: Location?, ?predicate: Prism::node, ?then_keyword_loc: Location?, ?statements: StatementsNode?, ?subsequent: ElseNode | IfNode | nil, ?end_keyword_loc: Location?) -> IfNode



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# File 'lib/prism/node.rb', line 7483

def copy(node_id: self.node_id, location: self.location, flags: self.flags, if_keyword_loc: self.if_keyword_loc, predicate: self.predicate, then_keyword_loc: self.then_keyword_loc, statements: self.statements, subsequent: self.subsequent, end_keyword_loc: self.end_keyword_loc)
  IfNode.new(source, node_id, location, flags, if_keyword_loc, predicate, then_keyword_loc, statements, subsequent, end_keyword_loc)
end

#deconstruct_keys(keys) ⇒ Object

def deconstruct_keys: (Array keys) -> { node_id: Integer, location: Location, if_keyword_loc: Location?, predicate: Prism::node, then_keyword_loc: Location?, statements: StatementsNode?, subsequent: ElseNode | IfNode | nil, end_keyword_loc: Location? }



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# File 'lib/prism/node.rb', line 7491

def deconstruct_keys(keys)
  { node_id: node_id, location: location, if_keyword_loc: if_keyword_loc, predicate: predicate, then_keyword_loc: then_keyword_loc, statements: statements, subsequent: subsequent, end_keyword_loc: end_keyword_loc }
end

#end_keyword ⇒ Object

def end_keyword: () -> String?



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# File 'lib/prism/node.rb', line 7600

def end_keyword
  end_keyword_loc&.slice
end

#end_keyword_loc ⇒ Object

The location of the ‘end` keyword if present, `nil` otherwise.

if foo
  bar
end
^^^



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# File 'lib/prism/node.rb', line 7577

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

#if_keyword ⇒ Object

def if_keyword: () -> String?



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# File 'lib/prism/node.rb', line 7590

def if_keyword
  if_keyword_loc&.slice
end

#if_keyword_loc ⇒ Object

The location of the ‘if` keyword if present.

bar if foo
    ^^

The ‘if_keyword_loc` field will be `nil` when the `IfNode` represents a ternary expression.



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# File 'lib/prism/node.rb', line 7501

def if_keyword_loc
  location = @if_keyword_loc
  case location
  when nil
    nil
  when Location
    location
  else
    @if_keyword_loc = Location.new(source, location >> 32, location & 0xFFFFFFFF)
  end
end

#inspect ⇒ Object

def inspect -> String



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# File 'lib/prism/node.rb', line 7605

def inspect
  InspectVisitor.compose(self)
end

#newline_flag!(lines) ⇒ Object

:nodoc:



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# File 'lib/prism/parse_result/newlines.rb', line 91

def newline_flag!(lines) # :nodoc:
  predicate.newline_flag!(lines)
end

#then_keyword ⇒ Object

def then_keyword: () -> String?



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# File 'lib/prism/node.rb', line 7595

def then_keyword
  then_keyword_loc&.slice
end

#then_keyword_loc ⇒ Object

The location of the ‘then` keyword (if present) or the `?` in a ternary expression, `nil` otherwise.

if foo then bar end
       ^^^^

a ? b : c
  ^



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# File 'lib/prism/node.rb', line 7534

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

#type ⇒ Object

Return a symbol representation of this node type. See ‘Node#type`.



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# File 'lib/prism/node.rb', line 7610

def type
  :if_node
end