class Prism::MatchRequiredNode

表示 => 运算符的使用。

foo => bar
^^^^^^^^^^

属性

pattern [R]

表示运算符的右侧。节点的类型取决于表达式。

任何看起来像局部变量名（包括 _）的内容都会导致生成 LocalVariableTargetNode。

foo => a # This is equivalent to writing `a = foo`
       ^

使用显式的 Array 或将表达式与 , 组合将导致生成 ArrayPatternNode。这可以由常量前置。

foo => [a]
       ^^^

foo => a, b
       ^^^^

foo => Bar[a, b]
       ^^^^^^^^^

如果数组模式包含至少两个通配符匹配，则会创建一个 FindPatternNode。

foo => *, 1, *a
       ^^^^^

使用显式的 Hash 或带方括号的常量和方括号内的哈希键将导致生成 HashPatternNode。

foo => { a: 1, b: }

foo => Bar[a: 1, b:]

foo => Bar[**]

要使用任何需要运行时求值的变量，需要进行固定。这会导致生成 PinnedVariableNode。

foo => ^a
       ^^

类似地，任何表达式都可以与固定一起使用。这会导致生成 PinnedExpressionNode。

foo => ^(a + 1)

其他任何内容都会导致生成该表达式的常规节点，例如 ConstantReadNode。

foo => CONST

value [R]

表示运算符的左侧。

foo => bar
^^^

Public Class Methods

new (source, node_id, location, flags, value, pattern, operator_loc)

Source

# File lib/prism/node.rb, line 12780
def initialize(source, node_id, location, flags, value, pattern, operator_loc)
  @source = source
  @node_id = node_id
  @location = location
  @flags = flags
  @value = value
  @pattern = pattern
  @operator_loc = operator_loc
end

初始化一个新的 MatchRequiredNode 节点。

type ()

Source

# File lib/prism/node.rb, line 12906
def self.type
  :match_required_node
end

返回此节点类型的符号表示。参见 Node::type。

Public Instance Methods

=== (other)

Source

# File lib/prism/node.rb, line 12912
def ===(other)
  other.is_a?(MatchRequiredNode) &&
    (value === other.value) &&
    (pattern === other.pattern) &&
    (operator_loc.nil? == other.operator_loc.nil?)
end

实现节点的相等性判断。这实际上是 ==，但不比较 location 的值。仅检查 location 是否存在。

accept (visitor)

Source

# File lib/prism/node.rb, line 12791
def accept(visitor)
  visitor.visit_match_required_node(self)
end

def accept: (Visitor visitor) -> void

child_nodes ()

Source

# File lib/prism/node.rb, line 12796
def child_nodes
  [value, pattern]
end

def child_nodes: () -> Array

也别名为：deconstruct

comment_targets ()

Source

# File lib/prism/node.rb, line 12806
def comment_targets
  [value, pattern, operator_loc] #: Array[Prism::node | Location]
end

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

compact_child_nodes ()

Source

# File lib/prism/node.rb, line 12801
def compact_child_nodes
  [value, pattern]
end

def compact_child_nodes: () -> Array

copy (node_id: self.node_id, location: self.location, flags: self.flags, value: self.value, pattern: self.pattern, operator_loc: self.operator_loc)

Source

# File lib/prism/node.rb, line 12811
def copy(node_id: self.node_id, location: self.location, flags: self.flags, value: self.value, pattern: self.pattern, operator_loc: self.operator_loc)
  MatchRequiredNode.new(source, node_id, location, flags, value, pattern, operator_loc)
end

def copy: (?node_id: Integer, ?location: Location, ?flags: Integer, ?value: Prism::node, ?pattern: Prism::node, ?operator_loc: Location) -> MatchRequiredNode

deconstruct ()

def deconstruct: () -> Array

别名：child_nodes

deconstruct_keys (keys)

Source

# File lib/prism/node.rb, line 12819
def deconstruct_keys(keys)
  { node_id: node_id, location: location, value: value, pattern: pattern, operator_loc: operator_loc }
end

def deconstruct_keys: (Array keys) -> { node_id: Integer, location: Location, value: Prism::node, pattern: Prism::node, operator_loc: Location }

inspect ()

Source

# File lib/prism/node.rb, line 12896
def inspect
  InspectVisitor.compose(self)
end

def inspect -> String

operator ()

Source

# File lib/prism/node.rb, line 12891
def operator
  operator_loc.slice
end

def operator: () -> String

operator_loc ()

Source

# File lib/prism/node.rb, line 12878
def operator_loc
  location = @operator_loc
  return location if location.is_a?(Location)
  @operator_loc = Location.new(source, location >> 32, location & 0xFFFFFFFF)
end

运算符的位置。

foo => bar
    ^^

save_operator_loc (repository)

Source

# File lib/prism/node.rb, line 12886
def save_operator_loc(repository)
  repository.enter(node_id, :operator_loc)
end

使用给定的已保存源来保存 operator_loc 位置，以便以后可以检索它。

type ()

Source

# File lib/prism/node.rb, line 12901
def type
  :match_required_node
end

返回此节点类型的符号表示。参见 Node#type。