class Prism::UnlessNode

表示 `unless` 关键字的使用，可以是块形式或修饰符形式。

bar unless foo
^^^^^^^^^^^^^^

unless foo then bar end
^^^^^^^^^^^^^^^^^^^^^^^

属性

else_clause [R]

unless 表达式的 else 子句（如果存在）。

unless cond then bar else baz end
                     ^^^^^^^^

predicate [R]

用于 unless 表达式评估的条件。它可以是任何[非空表达式](github.com/ruby/prism/blob/main/docs/parsing_rules.md#non-void-expression)。

unless cond then bar end
       ^^^^

bar unless cond
           ^^^^

statements [R]

如果 unless 条件为假，将执行的语句主体。如果没有提供主体，则为 `nil`。

unless cond then bar end
                 ^^^

公共类方法

new (source, node_id, location, flags, keyword_loc, predicate, then_keyword_loc, statements, else_clause, end_keyword_loc)

源代码

# File lib/prism/node.rb, line 17503
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

初始化一个新的 UnlessNode 节点。

type ()

源代码

# File lib/prism/node.rb, line 17664
def self.type
  :unless_node
end

返回此节点类型的符号表示。请参阅 `Node::type`。

公共实例方法

=== (other)

源代码

# File lib/prism/node.rb, line 17670
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

实现节点的 case-equality。这实际上是 ==，但不比较位置的值。位置仅检查是否存在。

accept (visitor)

源代码

# File lib/prism/node.rb, line 17517
def accept(visitor)
  visitor.visit_unless_node(self)
end

def accept: (Visitor visitor) -> void

child_nodes ()

源代码

# File lib/prism/node.rb, line 17522
def child_nodes
  [predicate, statements, else_clause]
end

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

也别名为: deconstruct

comment_targets ()

源代码

# File lib/prism/node.rb, line 17536
def comment_targets
  [keyword_loc, predicate, *then_keyword_loc, *statements, *else_clause, *end_keyword_loc] #: Array[Prism::node | Location]
end

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

compact_child_nodes ()

源代码

# File lib/prism/node.rb, line 17527
def compact_child_nodes
  compact = [] #: Array[Prism::node]
  compact << predicate
  compact << statements if statements
  compact << else_clause if else_clause
  compact
end

def compact_child_nodes: () -> Array

consequent ()

源代码

# File lib/prism/node_ext.rb, line 503
def consequent
  deprecated("else_clause")
  else_clause
end

返回 unless 节点的 else 子句。此方法已被弃用，请使用 else_clause。

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)

源代码

# File lib/prism/node.rb, line 17541
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 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

deconstruct ()

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

别名为: child_nodes

deconstruct_keys (keys)

源代码

# File lib/prism/node.rb, line 17549
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 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? }

end_keyword ()

源代码

# File lib/prism/node.rb, line 17649
def end_keyword
  end_keyword_loc&.slice
end

def end_keyword: () -> String?

end_keyword_loc ()

源代码

# File lib/prism/node.rb, line 17620
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

表示 `end` 关键字的位置（如果存在）。

unless cond then bar end
                     ^^^

inspect ()

源代码

# File lib/prism/node.rb, line 17654
def inspect
  InspectVisitor.compose(self)
end

def inspect -> String

keyword ()

源代码

# File lib/prism/node.rb, line 17639
def keyword
  keyword_loc.slice
end

def keyword: () -> String

keyword_loc ()

源代码

# File lib/prism/node.rb, line 17560
def keyword_loc
  location = @keyword_loc
  return location if location.is_a?(Location)
  @keyword_loc = Location.new(source, location >> 32, location & 0xFFFFFFFF)
end

表示 `unless` 关键字的位置。

unless cond then bar end
^^^^^^

bar unless cond
    ^^^^^^

save_end_keyword_loc (repository)

源代码

# File lib/prism/node.rb, line 17634
def save_end_keyword_loc(repository)
  repository.enter(node_id, :end_keyword_loc) unless @end_keyword_loc.nil?
end

使用给定的保存源保存 end_keyword_loc 位置，以便稍后检索。

save_keyword_loc (repository)

源代码

# File lib/prism/node.rb, line 17568
def save_keyword_loc(repository)
  repository.enter(node_id, :keyword_loc)
end

使用给定的保存源保存 keyword_loc 位置，以便稍后检索。

save_then_keyword_loc (repository)

源代码

# File lib/prism/node.rb, line 17599
def save_then_keyword_loc(repository)
  repository.enter(node_id, :then_keyword_loc) unless @then_keyword_loc.nil?
end

使用给定的保存源保存 then_keyword_loc 位置，以便稍后检索。

then_keyword ()

源代码

# File lib/prism/node.rb, line 17644
def then_keyword
  then_keyword_loc&.slice
end

def then_keyword: () -> String?

then_keyword_loc ()

源代码

# File lib/prism/node.rb, line 17585
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

表示 `then` 关键字的位置（如果存在）。

unless cond then bar end
            ^^^^

type ()

源代码

# File lib/prism/node.rb, line 17659
def type
  :unless_node
end

返回此节点类型的符号表示。请参阅 `Node#type`。