Class: RBI::Parser::TreeBuilder

Inherits:
Visitor
  • Object
show all
Extended by:
T::Sig
Defined in:
lib/rbi/parser.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(source, comments:, file:) ⇒ TreeBuilder

Returns a new instance of TreeBuilder.



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# File 'lib/rbi/parser.rb', line 163

def initialize(source, comments:, file:)
  super(source, file: file)

  @comments_by_line = T.let(comments.to_h { |c| [c.location.start_line, c] }, T::Hash[Integer, Prism::Comment])
  @tree = T.let(Tree.new, Tree)

  @scopes_stack = T.let([@tree], T::Array[Tree])
  @last_node = T.let(nil, T.nilable(Prism::Node))
  @last_sigs = T.let([], T::Array[RBI::Sig])
end

Instance Attribute Details

#last_node ⇒ Object (readonly)

Returns the value of attribute last_node.



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# File 'lib/rbi/parser.rb', line 160

def last_node
  @last_node
end

#tree ⇒ Object (readonly)

Returns the value of attribute tree.



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# File 'lib/rbi/parser.rb', line 157

def tree
  @tree
end

Instance Method Details

#visit_call_node(node) ⇒ Object 



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# File 'lib/rbi/parser.rb', line 324

def visit_call_node(node)
  @last_node = node
  message = node.name.to_s
  case message
  when "abstract!", "sealed!", "interface!"
    current_scope << Helper.new(
      message.delete_suffix("!"),
      loc: node_loc(node),
      comments: node_comments(node),
    )
  when "attr_reader"
    args = node.arguments

    unless args.is_a?(Prism::ArgumentsNode) && args.arguments.any?
      @last_node = nil
      return
    end

    sigs = current_sigs
    comments = detach_comments_from_sigs(sigs) + node_comments(node)

    current_scope << AttrReader.new(
      *T.unsafe(args.arguments.map { |arg| node_string!(arg).delete_prefix(":").to_sym }),
      sigs: sigs,
      loc: node_loc(node),
      comments: comments,
    )
  when "attr_writer"
    args = node.arguments

    unless args.is_a?(Prism::ArgumentsNode) && args.arguments.any?
      @last_node = nil
      return
    end

    sigs = current_sigs
    comments = detach_comments_from_sigs(sigs) + node_comments(node)

    current_scope << AttrWriter.new(
      *T.unsafe(args.arguments.map { |arg| node_string!(arg).delete_prefix(":").to_sym }),
      sigs: sigs,
      loc: node_loc(node),
      comments: comments,
    )
  when "attr_accessor"
    args = node.arguments

    unless args.is_a?(Prism::ArgumentsNode) && args.arguments.any?
      @last_node = nil
      return
    end

    sigs = current_sigs
    comments = detach_comments_from_sigs(sigs) + node_comments(node)

    current_scope << AttrAccessor.new(
      *T.unsafe(args.arguments.map { |arg| node_string!(arg).delete_prefix(":").to_sym }),
      sigs: sigs,
      loc: node_loc(node),
      comments: comments,
    )
  when "enums"
    if node.block && node.arguments.nil?
      scope = TEnumBlock.new(loc: node_loc(node), comments: node_comments(node))
      current_scope << scope
      @scopes_stack << scope
      visit(node.block)
      @scopes_stack.pop
    else
      current_scope << Send.new(
        message,
        parse_send_args(node.arguments),
        loc: node_loc(node),
        comments: node_comments(node),
      )
    end
  when "extend"
    args = node.arguments

    unless args.is_a?(Prism::ArgumentsNode) && args.arguments.any?
      @last_node = nil
      return
    end

    current_scope << Extend.new(
      *T.unsafe(args.arguments.map { |arg| node_string!(arg) }),
      loc: node_loc(node),
      comments: node_comments(node),
    )
  when "include"
    args = node.arguments

    unless args.is_a?(Prism::ArgumentsNode) && args.arguments.any?
      @last_node = nil
      return
    end

    current_scope << Include.new(
      *T.unsafe(args.arguments.map { |arg| node_string!(arg) }),
      loc: node_loc(node),
      comments: node_comments(node),
    )
  when "mixes_in_class_methods"
    args = node.arguments

    unless args.is_a?(Prism::ArgumentsNode) && args.arguments.any?
      @last_node = nil
      return
    end

    current_scope << MixesInClassMethods.new(
      *T.unsafe(args.arguments.map { |arg| node_string!(arg) }),
      loc: node_loc(node),
      comments: node_comments(node),
    )
  when "private", "protected", "public"
    args = node.arguments
    if args.is_a?(Prism::ArgumentsNode) && args.arguments.any?
      visit(node.arguments)
      last_node = @scopes_stack.last&.nodes&.last
      case last_node
      when Method, Attr
        last_node.visibility = parse_visibility(node.name.to_s, node)
      when Send
        current_scope << Send.new(
          message,
          parse_send_args(node.arguments),
          loc: node_loc(node),
          comments: node_comments(node),
        )
      else
        raise ParseError.new(
          "Unexpected token `#{node.message}` before `#{last_node&.string&.strip}`",
          node_loc(node),
        )
      end
    else
      current_scope << parse_visibility(node.name.to_s, node)
    end
  when "prop", "const"
    parse_tstruct_field(node)
  when "requires_ancestor"
    block = node.block

    unless block.is_a?(Prism::BlockNode)
      @last_node = nil
      return
    end

    body = block.body

    unless body.is_a?(Prism::StatementsNode)
      @last_node = nil
      return
    end

    current_scope << RequiresAncestor.new(
      node_string!(body),
      loc: node_loc(node),
      comments: node_comments(node),
    )
  when "sig"
    @last_sigs << parse_sig(node)
  else
    current_scope << Send.new(
      message,
      parse_send_args(node.arguments),
      loc: node_loc(node),
      comments: node_comments(node),
    )
  end

  @last_node = nil
end

#visit_class_node(node) ⇒ Object 



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# File 'lib/rbi/parser.rb', line 175

def visit_class_node(node)
  @last_node = node
  superclass_name = node_string(node.superclass)
  scope = case superclass_name
  when /^(::)?T::Struct$/
    TStruct.new(
      node_string!(node.constant_path),
      loc: node_loc(node),
      comments: node_comments(node),
    )
  when /^(::)?T::Enum$/
    TEnum.new(
      node_string!(node.constant_path),
      loc: node_loc(node),
      comments: node_comments(node),
    )
  else
    Class.new(
      node_string!(node.constant_path),
      superclass_name: superclass_name,
      loc: node_loc(node),
      comments: node_comments(node),
    )
  end

  current_scope << scope
  @scopes_stack << scope
  visit(node.body)
  scope.nodes.concat(current_sigs)
  collect_dangling_comments(node)
  @scopes_stack.pop
  @last_node = nil
end

#visit_constant_assign(node) ⇒ Object 



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# File 'lib/rbi/parser.rb', line 224

def visit_constant_assign(node)
  struct = parse_struct(node)

  current_scope << if struct
    struct
  elsif type_variable_definition?(node.value)
    TypeMember.new(
      case node
      when Prism::ConstantWriteNode
        node.name.to_s
      when Prism::ConstantPathWriteNode
        node_string!(node.target)
      end,
      node_string!(node.value),
      loc: node_loc(node),
      comments: node_comments(node),
    )
  else
    Const.new(
      case node
      when Prism::ConstantWriteNode
        node.name.to_s
      when Prism::ConstantPathWriteNode
        node_string!(node.target)
      end,
      node_string!(node.value),
      loc: node_loc(node),
      comments: node_comments(node),
    )
  end
end

#visit_constant_path_write_node(node) ⇒ Object 



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# File 'lib/rbi/parser.rb', line 217

def visit_constant_path_write_node(node)
  @last_node = node
  visit_constant_assign(node)
  @last_node = nil
end

#visit_constant_write_node(node) ⇒ Object 



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# File 'lib/rbi/parser.rb', line 210

def visit_constant_write_node(node)
  @last_node = node
  visit_constant_assign(node)
  @last_node = nil
end

#visit_def_node(node) ⇒ Object 



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# File 'lib/rbi/parser.rb', line 257

def visit_def_node(node)
  @last_node = node

  # We need to collect the comments with `current_sigs_comments` _before_ visiting the parameters to make sure
  # the method comments are properly associated with the sigs and not the parameters.
  sigs = current_sigs
  comments = detach_comments_from_sigs(sigs) + node_comments(node)
  params = parse_params(node.parameters)

  current_scope << Method.new(
    node.name.to_s,
    params: params,
    sigs: sigs,
    loc: node_loc(node),
    comments: comments,
    is_singleton: !!node.receiver,
  )
  @last_node = nil
end

#visit_module_node(node) ⇒ Object 



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# File 'lib/rbi/parser.rb', line 278

def visit_module_node(node)
  @last_node = node
  scope = Module.new(
    node_string!(node.constant_path),
    loc: node_loc(node),
    comments: node_comments(node),
  )

  current_scope << scope
  @scopes_stack << scope
  visit(node.body)
  scope.nodes.concat(current_sigs)
  collect_dangling_comments(node)
  @scopes_stack.pop
  @last_node = nil
end

#visit_program_node(node) ⇒ Object 



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# File 'lib/rbi/parser.rb', line 296

def visit_program_node(node)
  @last_node = node
  super
  @tree.nodes.concat(current_sigs)
  collect_orphan_comments
  separate_header_comments
  set_root_tree_loc
  @last_node = nil
end

#visit_singleton_class_node(node) ⇒ Object 



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# File 'lib/rbi/parser.rb', line 307

def visit_singleton_class_node(node)
  @last_node = node
  scope = SingletonClass.new(
    loc: node_loc(node),
    comments: node_comments(node),
  )

  current_scope << scope
  @scopes_stack << scope
  visit(node.body)
  scope.nodes.concat(current_sigs)
  collect_dangling_comments(node)
  @scopes_stack.pop
  @last_node = nil
end