class Prism::ConstantPathNode

表示通过 ‘::’ 操作符路径访问常量。

Foo::Bar
^^^^^^^^

属性

name [R]

正在访问的常量的名称。如果发生语法错误，则可能为 ‘nil’。

parent [R]

路径的左侧节点（如果存在）。它可以是 ‘nil’ 或任何 [非空表达式](github.com/ruby/prism/blob/main/docs/parsing_rules.md#non-void-expression)。当常量查找位于模块树的根目录时，它将为 `nil`。

Foo::Bar
^^^

self::Test
^^^^

a.b::C
^^^

公共类方法

new (source, node_id, location, flags, parent, name, delimiter_loc, name_loc)

源码

# File lib/prism/node.rb, line 5045
def initialize(source, node_id, location, flags, parent, name, delimiter_loc, name_loc)
  @source = source
  @node_id = node_id
  @location = location
  @flags = flags
  @parent = parent
  @name = name
  @delimiter_loc = delimiter_loc
  @name_loc = name_loc
end

初始化一个新的 ConstantPathNode 节点。

type ()

源码

# File lib/prism/node.rb, line 5160
def self.type
  :constant_path_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)

源码

# File lib/prism/node.rb, line 5166
def ===(other)
  other.is_a?(ConstantPathNode) &&
    (parent === other.parent) &&
    (name === other.name) &&
    (delimiter_loc.nil? == other.delimiter_loc.nil?) &&
    (name_loc.nil? == other.name_loc.nil?)
end

为节点实现 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)

源码

# File lib/prism/node.rb, line 5057
def accept(visitor)
  visitor.visit_constant_path_node(self)
end

def accept: (Visitor visitor) -> void

child ()

源码

# File lib/prism/node_ext.rb, line 202
def child
  deprecated("name", "name_loc")

  if name
    ConstantReadNode.new(source, -1, name_loc, 0, name)
  else
    MissingNode.new(source, -1, location, 0)
  end
end

以前，我们在此类上有一个子节点，其中包含常量读取或缺失节点。为了不造成重大更改，我们继续提供该 API。

child_nodes ()

源码

# File lib/prism/node.rb, line 5062
def child_nodes
  [parent]
end

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

也别名为： deconstruct

comment_targets ()

源码

# File lib/prism/node.rb, line 5074
def comment_targets
  [*parent, delimiter_loc, name_loc] #: Array[Prism::node | Location]
end

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

compact_child_nodes ()

源码

# File lib/prism/node.rb, line 5067
def compact_child_nodes
  compact = [] #: Array[Prism::node]
  compact << parent if parent
  compact
end

def compact_child_nodes: () -> Array

copy (node_id: self.node_id, location: self.location, flags: self.flags, parent: self.parent, name: self.name, delimiter_loc: self.delimiter_loc, name_loc: self.name_loc)

源码

# File lib/prism/node.rb, line 5079
def copy(node_id: self.node_id, location: self.location, flags: self.flags, parent: self.parent, name: self.name, delimiter_loc: self.delimiter_loc, name_loc: self.name_loc)
  ConstantPathNode.new(source, node_id, location, flags, parent, name, delimiter_loc, name_loc)
end

def copy: (?node_id: Integer, ?location: Location, ?flags: Integer, ?parent: Prism::node?, ?name: Symbol?, ?delimiter_loc: Location, ?name_loc: Location) -> ConstantPathNode

deconstruct ()

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

别名为: child_nodes

deconstruct_keys (keys)

源码

# File lib/prism/node.rb, line 5087
def deconstruct_keys(keys)
  { node_id: node_id, location: location, parent: parent, name: name, delimiter_loc: delimiter_loc, name_loc: name_loc }
end

def deconstruct_keys: (Array keys) -> { node_id: Integer, location: Location, parent: Prism::node?, name: Symbol?, delimiter_loc: Location, name_loc: Location }

delimiter ()

源码

# File lib/prism/node.rb, line 5145
def delimiter
  delimiter_loc.slice
end

def delimiter: () -> String

delimiter_loc ()

源码

# File lib/prism/node.rb, line 5113
def delimiter_loc
  location = @delimiter_loc
  return location if location.is_a?(Location)
  @delimiter_loc = Location.new(source, location >> 32, location & 0xFFFFFFFF)
end

‘::’ 分隔符的位置。

::Foo
^^

One::Two
   ^^

full_name ()

源码

# File lib/prism/node_ext.rb, line 195
def full_name
  full_name_parts.join("::")
end

返回此常量路径的全名。例如：“Foo::Bar”

full_name_parts ()

源码

# File lib/prism/node_ext.rb, line 173
def full_name_parts
  parts = [] #: Array[Symbol]
  current = self #: node?

  while current.is_a?(ConstantPathNode)
    name = current.name
    if name.nil?
      raise MissingNodesInConstantPathError, "Constant path contains missing nodes. Cannot compute full name"
    end

    parts.unshift(name)
    current = current.parent
  end

  if !current.is_a?(ConstantReadNode) && !current.nil?
    raise DynamicPartsInConstantPathError, "Constant path contains dynamic parts. Cannot compute full name"
  end

  parts.unshift(current&.name || :"")
end

返回此常量路径全名的各个部分的列表。例如：[:Foo, :Bar]

inspect ()

源码

# File lib/prism/node.rb, line 5150
def inspect
  InspectVisitor.compose(self)
end

def inspect -> String

name_loc ()

源码

# File lib/prism/node.rb, line 5132
def name_loc
  location = @name_loc
  return location if location.is_a?(Location)
  @name_loc = Location.new(source, location >> 32, location & 0xFFFFFFFF)
end

常量名称的位置。

::Foo
  ^^^

One::Two
     ^^^

save_delimiter_loc (repository)

源码

# File lib/prism/node.rb, line 5121
def save_delimiter_loc(repository)
  repository.enter(node_id, :delimiter_loc)
end

使用给定的已保存源保存 delimiter_loc 位置，以便稍后可以检索它。

save_name_loc (repository)

源码

# File lib/prism/node.rb, line 5140
def save_name_loc(repository)
  repository.enter(node_id, :name_loc)
end

使用给定的已保存源保存 name_loc 位置，以便稍后可以检索它。

type ()

源码

# File lib/prism/node.rb, line 5155
def type
  :constant_path_node
end

返回此节点类型的符号表示。请参阅 ‘Node#type’。