Class: RubyIndexer::DeclarationListener

Inherits:
Object
  • Object
show all
Defined in:
lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb

Constant Summary collapse

OBJECT_NESTING =

: Array

["Object"].freeze
BASIC_OBJECT_NESTING =

: Array

["BasicObject"].freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(index, dispatcher, parse_result, uri, collect_comments: false) ⇒ DeclarationListener

: (Index index, Prism::Dispatcher dispatcher, Prism::ParseLexResult | Prism::ParseResult parse_result, URI::Generic uri, ?collect_comments: bool) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 13

def initialize(index, dispatcher, parse_result, uri, collect_comments: false)
  @index = index
  @uri = uri
  @enhancements = Enhancement.all(self) #: Array[Enhancement]
  @visibility_stack = [VisibilityScope.public_scope] #: Array[VisibilityScope]
  @comments_by_line = parse_result.comments.to_h do |c|
    [c.location.start_line, c]
  end #: Hash[Integer, Prism::Comment]
  @inside_def = false #: bool
  @code_units_cache = parse_result
    .code_units_cache(@index.configuration.encoding) #: (^(Integer arg0) -> Integer | Prism::CodeUnitsCache)

  @source_lines = parse_result.source.lines #: Array[String]

  # The nesting stack we're currently inside. Used to determine the fully qualified name of constants, but only
  # stored by unresolved aliases which need the original nesting to be lazily resolved
  @stack = [] #: Array[String]

  # A stack of namespace entries that represent where we currently are. Used to properly assign methods to an owner
  @owner_stack = [] #: Array[Entry::Namespace]
  @indexing_errors = [] #: Array[String]
  @collect_comments = collect_comments

  dispatcher.register(
    self,
    :on_class_node_enter,
    :on_class_node_leave,
    :on_module_node_enter,
    :on_module_node_leave,
    :on_singleton_class_node_enter,
    :on_singleton_class_node_leave,
    :on_def_node_enter,
    :on_def_node_leave,
    :on_call_node_enter,
    :on_call_node_leave,
    :on_multi_write_node_enter,
    :on_constant_path_write_node_enter,
    :on_constant_path_or_write_node_enter,
    :on_constant_path_operator_write_node_enter,
    :on_constant_path_and_write_node_enter,
    :on_constant_write_node_enter,
    :on_constant_or_write_node_enter,
    :on_constant_and_write_node_enter,
    :on_constant_operator_write_node_enter,
    :on_global_variable_and_write_node_enter,
    :on_global_variable_operator_write_node_enter,
    :on_global_variable_or_write_node_enter,
    :on_global_variable_target_node_enter,
    :on_global_variable_write_node_enter,
    :on_instance_variable_write_node_enter,
    :on_instance_variable_and_write_node_enter,
    :on_instance_variable_operator_write_node_enter,
    :on_instance_variable_or_write_node_enter,
    :on_instance_variable_target_node_enter,
    :on_alias_method_node_enter,
    :on_class_variable_and_write_node_enter,
    :on_class_variable_operator_write_node_enter,
    :on_class_variable_or_write_node_enter,
    :on_class_variable_target_node_enter,
    :on_class_variable_write_node_enter,
  )
end

Instance Attribute Details

#indexing_errors ⇒ Object (readonly)

: Array



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 10

def indexing_errors
  @indexing_errors
end

Instance Method Details

#add_class(name_or_nesting, full_location, name_location, parent_class_name: nil, comments: nil) ⇒ Object

: ((String | Array) name_or_nesting, Prism::Location full_location, Prism::Location name_location, ?parent_class_name: String?, ?comments: String?) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 504

def add_class(name_or_nesting, full_location, name_location, parent_class_name: nil, comments: nil)
  nesting = name_or_nesting.is_a?(Array) ? name_or_nesting : Index.actual_nesting(@stack, name_or_nesting)
  entry = Entry::Class.new(
    nesting,
    @uri,
    Location.from_prism_location(full_location, @code_units_cache),
    Location.from_prism_location(name_location, @code_units_cache),
    comments,
    parent_class_name,
  )

  advance_namespace_stack(
    nesting.last, #: as !nil
    entry,
  )
end

#add_method(name, node_location, signatures, visibility: :public, comments: nil) ⇒ Object

: (String name, Prism::Location node_location, Array signatures, ?visibility: Symbol, ?comments: String?) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 472

def add_method(name, node_location, signatures, visibility: :public, comments: nil)
  location = Location.from_prism_location(node_location, @code_units_cache)

  @index.add(Entry::Method.new(
    name,
    @uri,
    location,
    location,
    comments,
    signatures,
    visibility,
    @owner_stack.last,
  ))
end

#add_module(name, full_location, name_location, comments: nil) ⇒ Object

: (String name, Prism::Location full_location, Prism::Location name_location, ?comments: String?) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 488

def add_module(name, full_location, name_location, comments: nil)
  location = Location.from_prism_location(full_location, @code_units_cache)
  name_loc = Location.from_prism_location(name_location, @code_units_cache)

  entry = Entry::Module.new(
    Index.actual_nesting(@stack, name),
    @uri,
    location,
    name_loc,
    comments,
  )

  advance_namespace_stack(name, entry)
end

#current_owner ⇒ Object

: -> Entry::Namespace?



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 539

def current_owner
  @owner_stack.last
end

#on_alias_method_node_enter(node) ⇒ Object

: (Prism::AliasMethodNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 431

def on_alias_method_node_enter(node)
  method_name = node.new_name.slice
  comments = collect_comments(node)
  @index.add(
    Entry::UnresolvedMethodAlias.new(
      method_name,
      node.old_name.slice,
      @owner_stack.last,
      @uri,
      Location.from_prism_location(node.new_name.location, @code_units_cache),
      comments,
    ),
  )
end

#on_call_node_enter(node) ⇒ Object

: (Prism::CallNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 251

def on_call_node_enter(node)
  message = node.name

  case message
  when :private_constant
    handle_private_constant(node)
  when :attr_reader
    handle_attribute(node, reader: true, writer: false)
  when :attr_writer
    handle_attribute(node, reader: false, writer: true)
  when :attr_accessor
    handle_attribute(node, reader: true, writer: true)
  when :attr
    has_writer = node.arguments&.arguments&.last&.is_a?(Prism::TrueNode) || false
    handle_attribute(node, reader: true, writer: has_writer)
  when :alias_method
    handle_alias_method(node)
  when :include, :prepend, :extend
    handle_module_operation(node, message)
  when :public
    handle_visibility_change(node, :public)
  when :protected
    handle_visibility_change(node, :protected)
  when :private
    handle_visibility_change(node, :private)
  when :module_function
    handle_module_function(node)
  when :private_class_method
    handle_private_class_method(node)
  end

  @enhancements.each do |enhancement|
    enhancement.on_call_node_enter(node)
  rescue StandardError => e
    @indexing_errors << <<~MSG
      Indexing error in #{@uri} with '#{enhancement.class.name}' on call node enter enhancement: #{e.message}
    MSG
  end
end

#on_call_node_leave(node) ⇒ Object

: (Prism::CallNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 292

def on_call_node_leave(node)
  message = node.name
  case message
  when :public, :protected, :private, :private_class_method
    # We want to restore the visibility stack when we leave a method definition with a visibility modifier
    # e.g. `private def foo; end`
    if node.arguments&.arguments&.first&.is_a?(Prism::DefNode)
      @visibility_stack.pop
    end
  end

  @enhancements.each do |enhancement|
    enhancement.on_call_node_leave(node)
  rescue StandardError => e
    @indexing_errors << <<~MSG
      Indexing error in #{@uri} with '#{enhancement.class.name}' on call node leave enhancement: #{e.message}
    MSG
  end
end

#on_class_node_enter(node) ⇒ Object

: (Prism::ClassNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 77

def on_class_node_enter(node)
  constant_path = node.constant_path
  superclass = node.superclass
  nesting = Index.actual_nesting(@stack, constant_path.slice)

  parent_class = case superclass
  when Prism::ConstantReadNode, Prism::ConstantPathNode
    superclass.slice
  else
    case nesting
    when OBJECT_NESTING
      # When Object is reopened, its parent class should still be the top-level BasicObject
      "::BasicObject"
    when BASIC_OBJECT_NESTING
      # When BasicObject is reopened, its parent class should still be nil
      nil
    else
      # Otherwise, the parent class should be the top-level Object
      "::Object"
    end
  end

  add_class(
    nesting,
    node.location,
    constant_path.location,
    parent_class_name: parent_class,
    comments: collect_comments(node),
  )
end

#on_class_node_leave(node) ⇒ Object

: (Prism::ClassNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 109

def on_class_node_leave(node)
  pop_namespace_stack
end

#on_class_variable_and_write_node_enter(node) ⇒ Object

: (Prism::ClassVariableAndWriteNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 447

def on_class_variable_and_write_node_enter(node)
  handle_class_variable(node, node.name_loc)
end

#on_class_variable_operator_write_node_enter(node) ⇒ Object

: (Prism::ClassVariableOperatorWriteNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 452

def on_class_variable_operator_write_node_enter(node)
  handle_class_variable(node, node.name_loc)
end

#on_class_variable_or_write_node_enter(node) ⇒ Object

: (Prism::ClassVariableOrWriteNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 457

def on_class_variable_or_write_node_enter(node)
  handle_class_variable(node, node.name_loc)
end

#on_class_variable_target_node_enter(node) ⇒ Object

: (Prism::ClassVariableTargetNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 462

def on_class_variable_target_node_enter(node)
  handle_class_variable(node, node.location)
end

#on_class_variable_write_node_enter(node) ⇒ Object

: (Prism::ClassVariableWriteNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 467

def on_class_variable_write_node_enter(node)
  handle_class_variable(node, node.name_loc)
end

#on_constant_and_write_node_enter(node) ⇒ Object

: (Prism::ConstantAndWriteNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 239

def on_constant_and_write_node_enter(node)
  name = fully_qualify_name(node.name.to_s)
  add_constant(node, name)
end

#on_constant_operator_write_node_enter(node) ⇒ Object

: (Prism::ConstantOperatorWriteNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 245

def on_constant_operator_write_node_enter(node)
  name = fully_qualify_name(node.name.to_s)
  add_constant(node, name)
end

#on_constant_or_write_node_enter(node) ⇒ Object

: (Prism::ConstantOrWriteNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 233

def on_constant_or_write_node_enter(node)
  name = fully_qualify_name(node.name.to_s)
  add_constant(node, name)
end

#on_constant_path_and_write_node_enter(node) ⇒ Object

: (Prism::ConstantPathAndWriteNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 217

def on_constant_path_and_write_node_enter(node)
  # ignore variable constants like `var::FOO` or `self.class::FOO`
  target = node.target
  return unless target.parent.nil? || target.parent.is_a?(Prism::ConstantReadNode)

  name = fully_qualify_name(target.location.slice)
  add_constant(node, name)
end

#on_constant_path_operator_write_node_enter(node) ⇒ Object

: (Prism::ConstantPathOperatorWriteNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 207

def on_constant_path_operator_write_node_enter(node)
  # ignore variable constants like `var::FOO` or `self.class::FOO`
  target = node.target
  return unless target.parent.nil? || target.parent.is_a?(Prism::ConstantReadNode)

  name = fully_qualify_name(target.location.slice)
  add_constant(node, name)
end

#on_constant_path_or_write_node_enter(node) ⇒ Object

: (Prism::ConstantPathOrWriteNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 197

def on_constant_path_or_write_node_enter(node)
  # ignore variable constants like `var::FOO` or `self.class::FOO`
  target = node.target
  return unless target.parent.nil? || target.parent.is_a?(Prism::ConstantReadNode)

  name = fully_qualify_name(target.location.slice)
  add_constant(node, name)
end

#on_constant_path_write_node_enter(node) ⇒ Object

: (Prism::ConstantPathWriteNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 187

def on_constant_path_write_node_enter(node)
  # ignore variable constants like `var::FOO` or `self.class::FOO`
  target = node.target
  return unless target.parent.nil? || target.parent.is_a?(Prism::ConstantReadNode)

  name = fully_qualify_name(target.location.slice)
  add_constant(node, name)
end

#on_constant_write_node_enter(node) ⇒ Object

: (Prism::ConstantWriteNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 227

def on_constant_write_node_enter(node)
  name = fully_qualify_name(node.name.to_s)
  add_constant(node, name)
end

#on_def_node_enter(node) ⇒ Object

: (Prism::DefNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 313

def on_def_node_enter(node)
  owner = @owner_stack.last
  return unless owner

  @inside_def = true
  method_name = node.name.to_s
  comments = collect_comments(node)
  scope = current_visibility_scope

  case node.receiver
  when nil
    location = Location.from_prism_location(node.location, @code_units_cache)
    name_location = Location.from_prism_location(node.name_loc, @code_units_cache)
    signatures = [Entry::Signature.new(list_params(node.parameters))]

    @index.add(Entry::Method.new(
      method_name,
      @uri,
      location,
      name_location,
      comments,
      signatures,
      scope.visibility,
      owner,
    ))

    if scope.module_func
      singleton = @index.existing_or_new_singleton_class(owner.name)

      @index.add(Entry::Method.new(
        method_name,
        @uri,
        location,
        name_location,
        comments,
        signatures,
        :public,
        singleton,
      ))
    end
  when Prism::SelfNode
    singleton = @index.existing_or_new_singleton_class(owner.name)

    @index.add(Entry::Method.new(
      method_name,
      @uri,
      Location.from_prism_location(node.location, @code_units_cache),
      Location.from_prism_location(node.name_loc, @code_units_cache),
      comments,
      [Entry::Signature.new(list_params(node.parameters))],
      scope.visibility,
      singleton,
    ))

    @owner_stack << singleton
  end
end

#on_def_node_leave(node) ⇒ Object

: (Prism::DefNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 372

def on_def_node_leave(node)
  @inside_def = false

  if node.receiver.is_a?(Prism::SelfNode)
    @owner_stack.pop
  end
end

#on_global_variable_and_write_node_enter(node) ⇒ Object

: (Prism::GlobalVariableAndWriteNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 381

def on_global_variable_and_write_node_enter(node)
  handle_global_variable(node, node.name_loc)
end

#on_global_variable_operator_write_node_enter(node) ⇒ Object

: (Prism::GlobalVariableOperatorWriteNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 386

def on_global_variable_operator_write_node_enter(node)
  handle_global_variable(node, node.name_loc)
end

#on_global_variable_or_write_node_enter(node) ⇒ Object

: (Prism::GlobalVariableOrWriteNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 391

def on_global_variable_or_write_node_enter(node)
  handle_global_variable(node, node.name_loc)
end

#on_global_variable_target_node_enter(node) ⇒ Object

: (Prism::GlobalVariableTargetNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 396

def on_global_variable_target_node_enter(node)
  handle_global_variable(node, node.location)
end

#on_global_variable_write_node_enter(node) ⇒ Object

: (Prism::GlobalVariableWriteNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 401

def on_global_variable_write_node_enter(node)
  handle_global_variable(node, node.name_loc)
end

#on_instance_variable_and_write_node_enter(node) ⇒ Object

: (Prism::InstanceVariableAndWriteNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 411

def on_instance_variable_and_write_node_enter(node)
  handle_instance_variable(node, node.name_loc)
end

#on_instance_variable_operator_write_node_enter(node) ⇒ Object

: (Prism::InstanceVariableOperatorWriteNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 416

def on_instance_variable_operator_write_node_enter(node)
  handle_instance_variable(node, node.name_loc)
end

#on_instance_variable_or_write_node_enter(node) ⇒ Object

: (Prism::InstanceVariableOrWriteNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 421

def on_instance_variable_or_write_node_enter(node)
  handle_instance_variable(node, node.name_loc)
end

#on_instance_variable_target_node_enter(node) ⇒ Object

: (Prism::InstanceVariableTargetNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 426

def on_instance_variable_target_node_enter(node)
  handle_instance_variable(node, node.location)
end

#on_instance_variable_write_node_enter(node) ⇒ Object

: (Prism::InstanceVariableWriteNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 406

def on_instance_variable_write_node_enter(node)
  handle_instance_variable(node, node.name_loc)
end

#on_module_node_enter(node) ⇒ Object

: (Prism::ModuleNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 114

def on_module_node_enter(node)
  constant_path = node.constant_path
  add_module(constant_path.slice, node.location, constant_path.location, comments: collect_comments(node))
end

#on_module_node_leave(node) ⇒ Object

: (Prism::ModuleNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 120

def on_module_node_leave(node)
  pop_namespace_stack
end

#on_multi_write_node_enter(node) ⇒ Object

: (Prism::MultiWriteNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 167

def on_multi_write_node_enter(node)
  value = node.value
  values = value.is_a?(Prism::ArrayNode) && value.opening_loc ? value.elements : []

  [*node.lefts, *node.rest, *node.rights].each_with_index do |target, i|
    current_value = values[i]
    # The moment we find a splat on the right hand side of the assignment, we can no longer figure out which value
    # gets assigned to what
    values.clear if current_value.is_a?(Prism::SplatNode)

    case target
    when Prism::ConstantTargetNode
      add_constant(target, fully_qualify_name(target.name.to_s), current_value)
    when Prism::ConstantPathTargetNode
      add_constant(target, fully_qualify_name(target.slice), current_value)
    end
  end
end

#on_singleton_class_node_enter(node) ⇒ Object

: (Prism::SingletonClassNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 125

def on_singleton_class_node_enter(node)
  @visibility_stack.push(VisibilityScope.public_scope)

  current_owner = @owner_stack.last

  if current_owner
    expression = node.expression
    name = (expression.is_a?(Prism::SelfNode) ? "<Class:#{last_name_in_stack}>" : "<Class:#{expression.slice}>")
    real_nesting = Index.actual_nesting(@stack, name)

    existing_entries = @index[real_nesting.join("::")] #: as Array[Entry::SingletonClass]?

    if existing_entries
      entry = existing_entries.first #: as !nil
      entry.update_singleton_information(
        Location.from_prism_location(node.location, @code_units_cache),
        Location.from_prism_location(expression.location, @code_units_cache),
        collect_comments(node),
      )
    else
      entry = Entry::SingletonClass.new(
        real_nesting,
        @uri,
        Location.from_prism_location(node.location, @code_units_cache),
        Location.from_prism_location(expression.location, @code_units_cache),
        collect_comments(node),
        nil,
      )
      @index.add(entry, skip_prefix_tree: true)
    end

    @owner_stack << entry
    @stack << name
  end
end

#on_singleton_class_node_leave(node) ⇒ Object

: (Prism::SingletonClassNode node) -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 162

def on_singleton_class_node_leave(node)
  pop_namespace_stack
end

#pop_namespace_stack ⇒ Object

: -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 532

def pop_namespace_stack
  @stack.pop
  @owner_stack.pop
  @visibility_stack.pop
end

#register_included_hook(&block) ⇒ Object

: { (Index index, Entry::Namespace base) -> void } -> void



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# File 'lib/ruby_indexer/lib/ruby_indexer/declaration_listener.rb', line 522

def register_included_hook(&block)
  owner = @owner_stack.last
  return unless owner

  @index.register_included_hook(owner.name) do |index, base|
    block.call(index, base)
  end
end