class IRB::TypeCompletion::TypeAnalyzer::DigTarget

# File irb/type_completion/type_analyzer.rb, line 1158
def self.calculate_target_type_scope(binding, parents, target)
  dig_targets = DigTarget.new(parents, target) do |type, scope|
    return type, scope
  end
  program = parents.first
  scope = Scope.from_binding(binding, program.locals)
  new(dig_targets).evaluate program, scope
  [Types::NIL, scope]
end

# File irb/type_completion/type_analyzer.rb, line 12
def initialize(parents, receiver, &block)
  @dig_ids = parents.to_h { [_1.__id__, true] }
  @target_id = receiver.__id__
  @block = block
end

# File irb/type_completion/type_analyzer.rb, line 937
def assign_numbered_parameters(numbered_parameters, scope, args, _kwargs)
  return if numbered_parameters.empty?
  max_num = numbered_parameters.map { _1[1].to_i }.max
  if max_num == 1
    scope['_1'] = args.first || Types::NIL
  else
    args = sized_splat(args.first, :to_ary, max_num) if args.size == 1
    numbered_parameters.each do |name|
      index = name[1].to_i - 1
      scope[name] = args[index] || Types::NIL
    end
  end
end

# File irb/type_completion/type_analyzer.rb, line 888
def assign_parameters(node, scope, args, kwargs)
  args = args.dup
  kwargs = kwargs.dup
  size = node.requireds.size + node.optionals.size + (node.rest ? 1 : 0) + node.posts.size
  args = sized_splat(args.first, :to_ary, size) if size >= 2 && args.size == 1
  reqs = args.shift node.requireds.size
  if node.rest
    # node.rest is Prism::RestParameterNode
    posts = []
    opts = args.shift node.optionals.size
    rest = args
  else
    posts = args.pop node.posts.size
    opts = args
    rest = []
  end
  node.requireds.zip reqs do |n, v|
    assign_required_parameter n, v, scope
  end
  node.optionals.zip opts do |n, v|
    # n is Prism::OptionalParameterNode
    values = [v]
    values << evaluate(n.value, scope) if n.value
    scope[n.name.to_s] = Types::UnionType[*values.compact]
  end
  node.posts.zip posts do |n, v|
    assign_required_parameter n, v, scope
  end
  if node.rest&.name
    # node.rest is Prism::RestParameterNode
    scope[node.rest.name.to_s] = Types.array_of(*rest)
  end
  node.keywords.each do |n|
    name = n.name.to_s.delete(':')
    values = [kwargs.delete(name)]
    # n is Prism::OptionalKeywordParameterNode (has n.value) or Prism::RequiredKeywordParameterNode (does not have n.value)
    values << evaluate(n.value, scope) if n.respond_to?(:value)
    scope[name] = Types::UnionType[*values.compact]
  end
  # node.keyword_rest is Prism::KeywordRestParameterNode or Prism::ForwardingParameterNode or Prism::NoKeywordsParameterNode
  if node.keyword_rest.is_a?(Prism::KeywordRestParameterNode) && node.keyword_rest.name
    scope[node.keyword_rest.name.to_s] = Types::InstanceType.new(Hash, K: Types::SYMBOL, V: Types::UnionType[*kwargs.values])
  end
  if node.block&.name
    # node.block is Prism::BlockParameterNode
    scope[node.block.name.to_s] = Types::PROC
  end
end

# File irb/type_completion/type_analyzer.rb, line 845
def assign_required_parameter(node, value, scope)
  case node
  when Prism::RequiredParameterNode
    scope[node.name.to_s] = value || Types::OBJECT
  when Prism::MultiTargetNode
    parameters = [*node.lefts, *node.rest, *node.rights]
    values = value ? sized_splat(value, :to_ary, parameters.size) : []
    parameters.zip values do |n, v|
      assign_required_parameter n, v, scope
    end
  when Prism::SplatNode
    splat_value = value ? Types.array_of(value) : Types::ARRAY
    assign_required_parameter node.expression, splat_value, scope if node.expression
  end
end

# File irb/type_completion/type_analyzer.rb, line 1019
def class_or_value_to_instance(type)
  instance_types = type.types.map do |t|
    t.is_a?(Types::SingletonType) ? Types::InstanceType.new(t.module_or_class) : t
  end
  Types::UnionType[*instance_types]
end

# File irb/type_completion/type_analyzer.rb, line 836
def const_path_write(receiver, name, value, scope)
  if receiver # receiver::A = value
    singleton_type = receiver.types.find { _1.is_a? Types::SingletonType }
    scope.set_const singleton_type.module_or_class, name, value if singleton_type
  else # ::A = value
    scope.set_const Object, name, value
  end
end

# File irb/type_completion/type_analyzer.rb, line 18
  def dig?(node) = @dig_ids[node.__id__]
  def target?(node) = @target_id == node.__id__
  def resolve(type, scope)
    @block.call type, scope
  end
end

OBJECT_METHODS = {
  to_s: Types::STRING,
  to_str: Types::STRING,
  to_a: Types::ARRAY,
  to_ary: Types::ARRAY,
  to_h: Types::HASH,
  to_hash: Types::HASH,
  to_i: Types::INTEGER,
  to_int: Types::INTEGER,
  to_f: Types::FLOAT,
  to_c: Types::COMPLEX,
  to_r: Types::RATIONAL
}

def initialize(dig_targets)
  @dig_targets = dig_targets
end

def evaluate(node, scope)
  method = "evaluate_#{node.type}"
  if respond_to? method
    result = send method, node, scope
  else
    result = Types::NIL
  end
  @dig_targets.resolve result, scope if @dig_targets.target? node
  result
end

def evaluate_program_node(node, scope)
  evaluate node.statements, scope
end

def evaluate_statements_node(node, scope)
  if node.body.empty?
    Types::NIL
  else
    node.body.map { evaluate _1, scope }.last
  end
end

def evaluate_def_node(node, scope)
  if node.receiver
    self_type = evaluate node.receiver, scope
  else
    current_self_types = scope.self_type.types
    self_types = current_self_types.map do |type|
      if type.is_a?(Types::SingletonType) && type.module_or_class.is_a?(Class)
        Types::InstanceType.new type.module_or_class
      else
        type
      end
    end
    self_type = Types::UnionType[*self_types]
  end
  if @dig_targets.dig?(node.body) || @dig_targets.dig?(node.parameters)
    params_table = node.locals.to_h { [_1.to_s, Types::NIL] }
    method_scope = Scope.new(
      scope,
      { **params_table, Scope::BREAK_RESULT => nil, Scope::NEXT_RESULT => nil, Scope::RETURN_RESULT => nil },
      self_type: self_type,
      trace_lvar: false,
      trace_ivar: false
    )
    if node.parameters
      # node.parameters is Prism::ParametersNode
      assign_parameters node.parameters, method_scope, [], {}
    end

    if @dig_targets.dig?(node.body)
      method_scope.conditional do |s|
        evaluate node.body, s
      end
    end
    method_scope.merge_jumps
    scope.update method_scope
  end
  Types::SYMBOL
end

def evaluate_integer_node(_node, _scope) = Types::INTEGER

def evaluate_float_node(_node, _scope) = Types::FLOAT

def evaluate_rational_node(_node, _scope) = Types::RATIONAL

def evaluate_imaginary_node(_node, _scope) = Types::COMPLEX

def evaluate_string_node(_node, _scope) = Types::STRING

def evaluate_x_string_node(_node, _scope)
  Types::UnionType[Types::STRING, Types::NIL]
end

def evaluate_symbol_node(_node, _scope) = Types::SYMBOL

def evaluate_regular_expression_node(_node, _scope) = Types::REGEXP

def evaluate_string_concat_node(node, scope)
  evaluate node.left, scope
  evaluate node.right, scope
  Types::STRING
end

def evaluate_interpolated_string_node(node, scope)
  node.parts.each { evaluate _1, scope }
  Types::STRING
end

def evaluate_interpolated_x_string_node(node, scope)
  node.parts.each { evaluate _1, scope }
  Types::STRING
end

def evaluate_interpolated_symbol_node(node, scope)
  node.parts.each { evaluate _1, scope }
  Types::SYMBOL
end

def evaluate_interpolated_regular_expression_node(node, scope)
  node.parts.each { evaluate _1, scope }
  Types::REGEXP
end

def evaluate_embedded_statements_node(node, scope)
  node.statements ? evaluate(node.statements, scope) : Types::NIL
  Types::STRING
end

def evaluate_embedded_variable_node(node, scope)
  evaluate node.variable, scope
  Types::STRING
end

def evaluate_array_node(node, scope)
  Types.array_of evaluate_list_splat_items(node.elements, scope)
end

def evaluate_hash_node(node, scope) = evaluate_hash(node, scope)
def evaluate_keyword_hash_node(node, scope) = evaluate_hash(node, scope)
def evaluate_hash(node, scope)
  keys = []
  values = []
  node.elements.each do |assoc|
    case assoc
    when Prism::AssocNode
      keys << evaluate(assoc.key, scope)
      values << evaluate(assoc.value, scope)
    when Prism::AssocSplatNode
      next unless assoc.value # def f(**); {**}

      hash = evaluate assoc.value, scope
      unless hash.is_a?(Types::InstanceType) && hash.klass == Hash
        hash = method_call hash, :to_hash, [], nil, nil, scope
      end
      if hash.is_a?(Types::InstanceType) && hash.klass == Hash
        keys << hash.params[:K] if hash.params[:K]
        values << hash.params[:V] if hash.params[:V]
      end
    end
  end
  if keys.empty? && values.empty?
    Types::InstanceType.new Hash
  else
    Types::InstanceType.new Hash, K: Types::UnionType[*keys], V: Types::UnionType[*values]
  end
end

def evaluate_parentheses_node(node, scope)
  node.body ? evaluate(node.body, scope) : Types::NIL
end

def evaluate_constant_path_node(node, scope)
  type, = evaluate_constant_node_info node, scope
  type
end

def evaluate_self_node(_node, scope) = scope.self_type

def evaluate_true_node(_node, _scope) = Types::TRUE

def evaluate_false_node(_node, _scope) = Types::FALSE

def evaluate_nil_node(_node, _scope) = Types::NIL

def evaluate_source_file_node(_node, _scope) = Types::STRING

def evaluate_source_line_node(_node, _scope) = Types::INTEGER

def evaluate_source_encoding_node(_node, _scope) = Types::InstanceType.new(Encoding)

def evaluate_numbered_reference_read_node(_node, _scope)
  Types::UnionType[Types::STRING, Types::NIL]
end

def evaluate_back_reference_read_node(_node, _scope)
  Types::UnionType[Types::STRING, Types::NIL]
end

def evaluate_reference_read(node, scope)
  scope[node.name.to_s] || Types::NIL
end
alias evaluate_constant_read_node evaluate_reference_read
alias evaluate_global_variable_read_node evaluate_reference_read
alias evaluate_local_variable_read_node evaluate_reference_read
alias evaluate_class_variable_read_node evaluate_reference_read
alias evaluate_instance_variable_read_node evaluate_reference_read


def evaluate_call_node(node, scope)
  is_field_assign = node.name.match?(/[^<>=!\]]=\z/) || (node.name == :[]= && !node.call_operator)
  receiver_type = node.receiver ? evaluate(node.receiver, scope) : scope.self_type
  evaluate_method = lambda do |scope|
    args_types, kwargs_types, block_sym_node, has_block = evaluate_call_node_arguments node, scope

    if block_sym_node
      block_sym = block_sym_node.value
      if @dig_targets.target? block_sym_node
        # method(args, &:completion_target)
        call_block_proc = ->(block_args, _self_type) do
          block_receiver = block_args.first || Types::OBJECT
          @dig_targets.resolve block_receiver, scope
          Types::OBJECT
        end
      else
        call_block_proc = ->(block_args, _self_type) do
          block_receiver, *rest = block_args
          block_receiver ? method_call(block_receiver || Types::OBJECT, block_sym, rest, nil, nil, scope) : Types::OBJECT
        end
      end
    elsif node.block.is_a? Prism::BlockNode
      call_block_proc = ->(block_args, block_self_type) do
        scope.conditional do |s|
          numbered_parameters = node.block.locals.grep(/\A_[1-9]/).map(&:to_s)
          params_table = node.block.locals.to_h { [_1.to_s, Types::NIL] }
          table = { **params_table, Scope::BREAK_RESULT => nil, Scope::NEXT_RESULT => nil }
          block_scope = Scope.new s, table, self_type: block_self_type, trace_ivar: !block_self_type
          # TODO kwargs
          if node.block.parameters&.parameters
            # node.block.parameters is Prism::BlockParametersNode
            assign_parameters node.block.parameters.parameters, block_scope, block_args, {}
          elsif !numbered_parameters.empty?
            assign_numbered_parameters numbered_parameters, block_scope, block_args, {}
          end
          result = node.block.body ? evaluate(node.block.body, block_scope) : Types::NIL
          block_scope.merge_jumps
          s.update block_scope
          nexts = block_scope[Scope::NEXT_RESULT]
          breaks = block_scope[Scope::BREAK_RESULT]
          if block_scope.terminated?
            [Types::UnionType[*nexts], breaks]
          else
            [Types::UnionType[result, *nexts], breaks]
          end
        end
      end
    elsif has_block
      call_block_proc = ->(_block_args, _self_type) { Types::OBJECT }
    end
    result = method_call receiver_type, node.name, args_types, kwargs_types, call_block_proc, scope
    if is_field_assign
      args_types.last || Types::NIL
    else
      result
    end
  end
  if node.call_operator == '&.'
    result = scope.conditional { evaluate_method.call _1 }
    if receiver_type.nillable?
      Types::UnionType[result, Types::NIL]
    else
      result
    end
  else
    evaluate_method.call scope
  end
end

def evaluate_and_node(node, scope) = evaluate_and_or(node, scope, and_op: true)
def evaluate_or_node(node, scope) = evaluate_and_or(node, scope, and_op: false)
def evaluate_and_or(node, scope, and_op:)
  left = evaluate node.left, scope
  right = scope.conditional { evaluate node.right, _1 }
  if and_op
    Types::UnionType[right, Types::NIL, Types::FALSE]
  else
    Types::UnionType[left, right]
  end
end

def evaluate_call_operator_write_node(node, scope) = evaluate_call_write(node, scope, :operator, node.write_name)
def evaluate_call_and_write_node(node, scope) = evaluate_call_write(node, scope, :and, node.write_name)
def evaluate_call_or_write_node(node, scope) = evaluate_call_write(node, scope, :or, node.write_name)
def evaluate_index_operator_write_node(node, scope) = evaluate_call_write(node, scope, :operator, :[]=)
def evaluate_index_and_write_node(node, scope) = evaluate_call_write(node, scope, :and, :[]=)
def evaluate_index_or_write_node(node, scope) = evaluate_call_write(node, scope, :or, :[]=)
def evaluate_call_write(node, scope, operator, write_name)
  receiver_type = evaluate node.receiver, scope
  if write_name == :[]=
    args_types, kwargs_types, block_sym_node, has_block = evaluate_call_node_arguments node, scope
  else
    args_types = []
  end
  if block_sym_node
    block_sym = block_sym_node.value
    call_block_proc = ->(block_args, _self_type) do
      block_receiver, *rest = block_args
      block_receiver ? method_call(block_receiver || Types::OBJECT, block_sym, rest, nil, nil, scope) : Types::OBJECT
    end
  elsif has_block
    call_block_proc = ->(_block_args, _self_type) { Types::OBJECT }
  end
  method = write_name.to_s.delete_suffix('=')
  left = method_call receiver_type, method, args_types, kwargs_types, call_block_proc, scope
  case operator
  when :and
    right = scope.conditional { evaluate node.value, _1 }
    Types::UnionType[right, Types::NIL, Types::FALSE]
  when :or
    right = scope.conditional { evaluate node.value, _1 }
    Types::UnionType[left, right]
  else
    right = evaluate node.value, scope
    method_call left, node.operator, [right], nil, nil, scope, name_match: false
  end
end

def evaluate_variable_operator_write(node, scope)
  left = scope[node.name.to_s] || Types::OBJECT
  right = evaluate node.value, scope
  scope[node.name.to_s] = method_call left, node.operator, [right], nil, nil, scope, name_match: false
end
alias evaluate_global_variable_operator_write_node evaluate_variable_operator_write
alias evaluate_local_variable_operator_write_node evaluate_variable_operator_write
alias evaluate_class_variable_operator_write_node evaluate_variable_operator_write
alias evaluate_instance_variable_operator_write_node evaluate_variable_operator_write

def evaluate_variable_and_write(node, scope)
  right = scope.conditional { evaluate node.value, scope }
  scope[node.name.to_s] = Types::UnionType[right, Types::NIL, Types::FALSE]
end
alias evaluate_global_variable_and_write_node evaluate_variable_and_write
alias evaluate_local_variable_and_write_node evaluate_variable_and_write
alias evaluate_class_variable_and_write_node evaluate_variable_and_write
alias evaluate_instance_variable_and_write_node evaluate_variable_and_write

def evaluate_variable_or_write(node, scope)
  left = scope[node.name.to_s] || Types::OBJECT
  right = scope.conditional { evaluate node.value, scope }
  scope[node.name.to_s] = Types::UnionType[left, right]
end
alias evaluate_global_variable_or_write_node evaluate_variable_or_write
alias evaluate_local_variable_or_write_node evaluate_variable_or_write
alias evaluate_class_variable_or_write_node evaluate_variable_or_write
alias evaluate_instance_variable_or_write_node evaluate_variable_or_write

def evaluate_constant_operator_write_node(node, scope)
  left = scope[node.name.to_s] || Types::OBJECT
  right = evaluate node.value, scope
  scope[node.name.to_s] = method_call left, node.operator, [right], nil, nil, scope, name_match: false
end

def evaluate_constant_and_write_node(node, scope)
  right = scope.conditional { evaluate node.value, scope }
  scope[node.name.to_s] = Types::UnionType[right, Types::NIL, Types::FALSE]
end

def evaluate_constant_or_write_node(node, scope)
  left = scope[node.name.to_s] || Types::OBJECT
  right = scope.conditional { evaluate node.value, scope }
  scope[node.name.to_s] = Types::UnionType[left, right]
end

def evaluate_constant_path_operator_write_node(node, scope)
  left, receiver, _parent_module, name = evaluate_constant_node_info node.target, scope
  right = evaluate node.value, scope
  value = method_call left, node.operator, [right], nil, nil, scope, name_match: false
  const_path_write receiver, name, value, scope
  value
end

def evaluate_constant_path_and_write_node(node, scope)
  _left, receiver, _parent_module, name = evaluate_constant_node_info node.target, scope
  right = scope.conditional { evaluate node.value, scope }
  value = Types::UnionType[right, Types::NIL, Types::FALSE]
  const_path_write receiver, name, value, scope
  value
end

def evaluate_constant_path_or_write_node(node, scope)
  left, receiver, _parent_module, name = evaluate_constant_node_info node.target, scope
  right = scope.conditional { evaluate node.value, scope }
  value = Types::UnionType[left, right]
  const_path_write receiver, name, value, scope
  value
end

def evaluate_constant_path_write_node(node, scope)
  receiver = evaluate node.target.parent, scope if node.target.parent
  value = evaluate node.value, scope
  const_path_write receiver, node.target.child.name.to_s, value, scope
  value
end

def evaluate_lambda_node(node, scope)
  local_table = node.locals.to_h { [_1.to_s, Types::OBJECT] }
  block_scope = Scope.new scope, { **local_table, Scope::BREAK_RESULT => nil, Scope::NEXT_RESULT => nil, Scope::RETURN_RESULT => nil }
  block_scope.conditional do |s|
    assign_parameters node.parameters.parameters, s, [], {} if node.parameters&.parameters
    evaluate node.body, s if node.body
  end
  block_scope.merge_jumps
  scope.update block_scope
  Types::PROC
end

def evaluate_reference_write(node, scope)
  scope[node.name.to_s] = evaluate node.value, scope
end
alias evaluate_constant_write_node evaluate_reference_write
alias evaluate_global_variable_write_node evaluate_reference_write
alias evaluate_local_variable_write_node evaluate_reference_write
alias evaluate_class_variable_write_node evaluate_reference_write
alias evaluate_instance_variable_write_node evaluate_reference_write

def evaluate_multi_write_node(node, scope)
  evaluated_receivers = {}
  evaluate_multi_write_receiver node, scope, evaluated_receivers
  value = (
    if node.value.is_a? Prism::ArrayNode
      if node.value.elements.any?(Prism::SplatNode)
        evaluate node.value, scope
      else
        node.value.elements.map do |n|
          evaluate n, scope
        end
      end
    elsif node.value
      evaluate node.value, scope
    else
      Types::NIL
    end
  )
  evaluate_multi_write node, value, scope, evaluated_receivers
  value.is_a?(Array) ? Types.array_of(*value) : value
end

def evaluate_if_node(node, scope) = evaluate_if_unless(node, scope)
def evaluate_unless_node(node, scope) = evaluate_if_unless(node, scope)
def evaluate_if_unless(node, scope)
  evaluate node.predicate, scope
  Types::UnionType[*scope.run_branches(
    -> { node.statements ? evaluate(node.statements, _1) : Types::NIL },
    -> { node.consequent ? evaluate(node.consequent, _1) : Types::NIL }
  )]
end

def evaluate_else_node(node, scope)
  node.statements ? evaluate(node.statements, scope) : Types::NIL
end

def evaluate_while_until(node, scope)
  inner_scope = Scope.new scope, { Scope::BREAK_RESULT => nil }
  evaluate node.predicate, inner_scope
  if node.statements
    inner_scope.conditional do |s|
      evaluate node.statements, s
    end
  end
  inner_scope.merge_jumps
  scope.update inner_scope
  breaks = inner_scope[Scope::BREAK_RESULT]
  breaks ? Types::UnionType[breaks, Types::NIL] : Types::NIL
end
alias evaluate_while_node evaluate_while_until
alias evaluate_until_node evaluate_while_until

def evaluate_break_node(node, scope) = evaluate_jump(node, scope, :break)
def evaluate_next_node(node, scope) = evaluate_jump(node, scope, :next)
def evaluate_return_node(node, scope) = evaluate_jump(node, scope, :return)
def evaluate_jump(node, scope, mode)
  internal_key = (
    case mode
    when :break
      Scope::BREAK_RESULT
    when :next
      Scope::NEXT_RESULT
    when :return
      Scope::RETURN_RESULT
    end
  )
  jump_value = (
    arguments = node.arguments&.arguments
    if arguments.nil? || arguments.empty?
      Types::NIL
    elsif arguments.size == 1 && !arguments.first.is_a?(Prism::SplatNode)
      evaluate arguments.first, scope
    else
      Types.array_of evaluate_list_splat_items(arguments, scope)
    end
  )
  scope.terminate_with internal_key, jump_value
  Types::NIL
end

def evaluate_yield_node(node, scope)
  evaluate_list_splat_items node.arguments.arguments, scope if node.arguments
  Types::OBJECT
end

def evaluate_redo_node(_node, scope)
  scope.terminate
  Types::NIL
end

def evaluate_retry_node(_node, scope)
  scope.terminate
  Types::NIL
end

def evaluate_forwarding_super_node(_node, _scope) = Types::OBJECT

def evaluate_super_node(node, scope)
  evaluate_list_splat_items node.arguments.arguments, scope if node.arguments
  Types::OBJECT
end

def evaluate_begin_node(node, scope)
  return_type = node.statements ? evaluate(node.statements, scope) : Types::NIL
  if node.rescue_clause
    if node.else_clause
      return_types = scope.run_branches(
        ->{ evaluate node.rescue_clause, _1 },
        ->{ evaluate node.else_clause, _1 }
      )
    else
      return_types = [
        return_type,
        scope.conditional { evaluate node.rescue_clause, _1 }
      ]
    end
    return_type = Types::UnionType[*return_types]
  end
  if node.ensure_clause&.statements
    # ensure_clause is Prism::EnsureNode
    evaluate node.ensure_clause.statements, scope
  end
  return_type
end

def evaluate_rescue_node(node, scope)
  run_rescue = lambda do |s|
    if node.reference
      error_classes_type = evaluate_list_splat_items node.exceptions, s
      error_types = error_classes_type.types.filter_map do
        Types::InstanceType.new _1.module_or_class if _1.is_a?(Types::SingletonType)
      end
      error_types << Types::InstanceType.new(StandardError) if error_types.empty?
      error_type = Types::UnionType[*error_types]
      case node.reference
      when Prism::LocalVariableTargetNode, Prism::InstanceVariableTargetNode, Prism::ClassVariableTargetNode, Prism::GlobalVariableTargetNode, Prism::ConstantTargetNode
        s[node.reference.name.to_s] = error_type
      when Prism::CallNode
        evaluate node.reference, s
      end
    end
    node.statements ? evaluate(node.statements, s) : Types::NIL
  end
  if node.consequent # begin; rescue A; rescue B; end
    types = scope.run_branches(
      run_rescue,
      -> { evaluate node.consequent, _1 }
    )
    Types::UnionType[*types]
  else
    run_rescue.call scope
  end
end

def evaluate_rescue_modifier_node(node, scope)
  a = evaluate node.expression, scope
  b = scope.conditional { evaluate node.rescue_expression, _1 }
  Types::UnionType[a, b]
end

def evaluate_singleton_class_node(node, scope)
  klass_types = evaluate(node.expression, scope).types.filter_map do |type|
    Types::SingletonType.new type.klass if type.is_a? Types::InstanceType
  end
  klass_types = [Types::CLASS] if klass_types.empty?
  table = node.locals.to_h { [_1.to_s, Types::NIL] }
  sclass_scope = Scope.new(
    scope,
    { **table, Scope::BREAK_RESULT => nil, Scope::NEXT_RESULT => nil, Scope::RETURN_RESULT => nil },
    trace_ivar: false,
    trace_lvar: false,
    self_type: Types::UnionType[*klass_types]
  )
  result = node.body ? evaluate(node.body, sclass_scope) : Types::NIL
  scope.update sclass_scope
  result
end

def evaluate_class_node(node, scope) = evaluate_class_module(node, scope, true)
def evaluate_module_node(node, scope) = evaluate_class_module(node, scope, false)
def evaluate_class_module(node, scope, is_class)
  unless node.constant_path.is_a?(Prism::ConstantReadNode) || node.constant_path.is_a?(Prism::ConstantPathNode)
    # Incomplete class/module `class (statement[cursor_here])::Name; end`
    evaluate node.constant_path, scope
    return Types::NIL
  end
  const_type, _receiver, parent_module, name = evaluate_constant_node_info node.constant_path, scope
  if is_class
    select_class_type = -> { _1.is_a?(Types::SingletonType) && _1.module_or_class.is_a?(Class) }
    module_types = const_type.types.select(&select_class_type)
    module_types += evaluate(node.superclass, scope).types.select(&select_class_type) if node.superclass
    module_types << Types::CLASS if module_types.empty?
  else
    module_types = const_type.types.select { _1.is_a?(Types::SingletonType) && !_1.module_or_class.is_a?(Class) }
    module_types << Types::MODULE if module_types.empty?
  end
  return Types::NIL unless node.body

  table = node.locals.to_h { [_1.to_s, Types::NIL] }
  if !name.empty? && (parent_module.is_a?(Module) || parent_module.nil?)
    value = parent_module.const_get name if parent_module&.const_defined? name
    unless value
      value_type = scope[name]
      value = value_type.module_or_class if value_type.is_a? Types::SingletonType
    end

    if value.is_a? Module
      nesting = [value, []]
    else
      if parent_module
        nesting = [parent_module, [name]]
      else
        parent_nesting, parent_path = scope.module_nesting.first
        nesting = [parent_nesting, parent_path + [name]]
      end
      nesting_key = [nesting[0].__id__, nesting[1]].join('::')
      nesting_value = is_class ? Types::CLASS : Types::MODULE
    end
  else
    # parent_module == :unknown
    # TODO: dummy module
  end
  module_scope = Scope.new(
    scope,
    { **table, Scope::BREAK_RESULT => nil, Scope::NEXT_RESULT => nil, Scope::RETURN_RESULT => nil },
    trace_ivar: false,
    trace_lvar: false,
    self_type: Types::UnionType[*module_types],
    nesting: nesting
  )
  module_scope[nesting_key] = nesting_value if nesting_value
  result = evaluate(node.body, module_scope)
  scope.update module_scope
  result
end

def evaluate_for_node(node, scope)
  node.statements
  collection = evaluate node.collection, scope
  inner_scope = Scope.new scope, { Scope::BREAK_RESULT => nil }
  ary_type = method_call collection, :to_ary, [], nil, nil, nil, name_match: false
  element_types = ary_type.types.filter_map do |ary|
    ary.params[:Elem] if ary.is_a?(Types::InstanceType) && ary.klass == Array
  end
  element_type = Types::UnionType[*element_types]
  inner_scope.conditional do |s|
    evaluate_write node.index, element_type, s, nil
    evaluate node.statements, s if node.statements
  end
  inner_scope.merge_jumps
  scope.update inner_scope
  breaks = inner_scope[Scope::BREAK_RESULT]
  breaks ? Types::UnionType[breaks, collection] : collection
end

def evaluate_case_node(node, scope)
  target = evaluate(node.predicate, scope) if node.predicate
  # TODO
  branches = node.conditions.map do |condition|
    ->(s) { evaluate_case_match target, condition, s }
  end
  if node.consequent
    branches << ->(s) { evaluate node.consequent, s }
  elsif node.conditions.any? { _1.is_a? Prism::WhenNode }
    branches << ->(_s) { Types::NIL }
  end
  Types::UnionType[*scope.run_branches(*branches)]
end

def evaluate_match_required_node(node, scope)
  value_type = evaluate node.value, scope
  evaluate_match_pattern value_type, node.pattern, scope
  Types::NIL # void value
end

def evaluate_match_predicate_node(node, scope)
  value_type = evaluate node.value, scope
  scope.conditional { evaluate_match_pattern value_type, node.pattern, _1 }
  Types::BOOLEAN
end

def evaluate_range_node(node, scope)
  beg_type = evaluate node.left, scope if node.left
  end_type = evaluate node.right, scope if node.right
  elem = (Types::UnionType[*[beg_type, end_type].compact]).nonnillable
  Types::InstanceType.new Range, Elem: elem
end

def evaluate_defined_node(node, scope)
  scope.conditional { evaluate node.value, _1 }
  Types::UnionType[Types::STRING, Types::NIL]
end

def evaluate_flip_flop_node(node, scope)
  scope.conditional { evaluate node.left, _1 } if node.left
  scope.conditional { evaluate node.right, _1 } if node.right
  Types::BOOLEAN
end

def evaluate_multi_target_node(node, scope)
  # Raw MultiTargetNode, incomplete code like `a,b`, `*a`.
  evaluate_multi_write_receiver node, scope, nil
  Types::NIL
end

def evaluate_splat_node(node, scope)
  # Raw SplatNode, incomplete code like `*a.`
  evaluate_multi_write_receiver node.expression, scope, nil if node.expression
  Types::NIL
end

def evaluate_implicit_node(node, scope)
  evaluate node.value, scope
end

def evaluate_match_write_node(node, scope)
  # /(?<a>)(?<b>)/ =~ string
  evaluate node.call, scope
  node.locals.each { scope[_1.to_s] = Types::UnionType[Types::STRING, Types::NIL] }
  Types::BOOLEAN
end

def evaluate_match_last_line_node(_node, _scope)
  Types::BOOLEAN
end

def evaluate_interpolated_match_last_line_node(node, scope)
  node.parts.each { evaluate _1, scope }
  Types::BOOLEAN
end

def evaluate_pre_execution_node(node, scope)
  node.statements ? evaluate(node.statements, scope) : Types::NIL
end

def evaluate_post_execution_node(node, scope)
  node.statements && @dig_targets.dig?(node.statements) ? evaluate(node.statements, scope) : Types::NIL
end

def evaluate_alias_method_node(_node, _scope) = Types::NIL
def evaluate_alias_global_variable_node(_node, _scope) = Types::NIL
def evaluate_undef_node(_node, _scope) = Types::NIL
def evaluate_missing_node(_node, _scope) = Types::NIL

def evaluate_call_node_arguments(call_node, scope)
  # call_node.arguments is Prism::ArgumentsNode
  arguments = call_node.arguments&.arguments&.dup || []
  block_arg = call_node.block.expression if call_node.block.is_a?(Prism::BlockArgumentNode)
  kwargs = arguments.pop.elements if arguments.last.is_a?(Prism::KeywordHashNode)
  args_types = arguments.map do |arg|
    case arg
    when Prism::ForwardingArgumentsNode
      # `f(a, ...)` treat like splat
      nil
    when Prism::SplatNode
      evaluate arg.expression, scope if arg.expression
      nil # TODO: splat
    else
      evaluate arg, scope
    end
  end
  if kwargs
    kwargs_types = kwargs.map do |arg|
      case arg
      when Prism::AssocNode
        if arg.key.is_a?(Prism::SymbolNode)
          [arg.key.value, evaluate(arg.value, scope)]
        else
          evaluate arg.key, scope
          evaluate arg.value, scope
          nil
        end
      when Prism::AssocSplatNode
        evaluate arg.value, scope if arg.value
        nil
      end
    end.compact.to_h
  end
  if block_arg.is_a? Prism::SymbolNode
    block_sym_node = block_arg
  elsif block_arg
    evaluate block_arg, scope
  end
  [args_types, kwargs_types, block_sym_node, !!block_arg]
end

def const_path_write(receiver, name, value, scope)
  if receiver # receiver::A = value
    singleton_type = receiver.types.find { _1.is_a? Types::SingletonType }
    scope.set_const singleton_type.module_or_class, name, value if singleton_type
  else # ::A = value
    scope.set_const Object, name, value
  end
end

def assign_required_parameter(node, value, scope)
  case node
  when Prism::RequiredParameterNode
    scope[node.name.to_s] = value || Types::OBJECT
  when Prism::MultiTargetNode
    parameters = [*node.lefts, *node.rest, *node.rights]
    values = value ? sized_splat(value, :to_ary, parameters.size) : []
    parameters.zip values do |n, v|
      assign_required_parameter n, v, scope
    end
  when Prism::SplatNode
    splat_value = value ? Types.array_of(value) : Types::ARRAY
    assign_required_parameter node.expression, splat_value, scope if node.expression
  end
end

def evaluate_constant_node_info(node, scope)
  case node
  when Prism::ConstantPathNode
    name = node.child.name.to_s
    if node.parent
      receiver = evaluate node.parent, scope
      if receiver.is_a? Types::SingletonType
        parent_module = receiver.module_or_class
      end
    else
      parent_module = Object
    end
    if parent_module
      type = scope.get_const(parent_module, [name]) || Types::NIL
    else
      parent_module = :unknown
      type = Types::NIL
    end
  when Prism::ConstantReadNode
    name = node.name.to_s
    type = scope[name]
  end
  @dig_targets.resolve type, scope if @dig_targets.target? node
  [type, receiver, parent_module, name]
end


def assign_parameters(node, scope, args, kwargs)
  args = args.dup
  kwargs = kwargs.dup
  size = node.requireds.size + node.optionals.size + (node.rest ? 1 : 0) + node.posts.size
  args = sized_splat(args.first, :to_ary, size) if size >= 2 && args.size == 1
  reqs = args.shift node.requireds.size
  if node.rest
    # node.rest is Prism::RestParameterNode
    posts = []
    opts = args.shift node.optionals.size
    rest = args
  else
    posts = args.pop node.posts.size
    opts = args
    rest = []
  end
  node.requireds.zip reqs do |n, v|
    assign_required_parameter n, v, scope
  end
  node.optionals.zip opts do |n, v|
    # n is Prism::OptionalParameterNode
    values = [v]
    values << evaluate(n.value, scope) if n.value
    scope[n.name.to_s] = Types::UnionType[*values.compact]
  end
  node.posts.zip posts do |n, v|
    assign_required_parameter n, v, scope
  end
  if node.rest&.name
    # node.rest is Prism::RestParameterNode
    scope[node.rest.name.to_s] = Types.array_of(*rest)
  end
  node.keywords.each do |n|
    name = n.name.to_s.delete(':')
    values = [kwargs.delete(name)]
    # n is Prism::OptionalKeywordParameterNode (has n.value) or Prism::RequiredKeywordParameterNode (does not have n.value)
    values << evaluate(n.value, scope) if n.respond_to?(:value)
    scope[name] = Types::UnionType[*values.compact]
  end
  # node.keyword_rest is Prism::KeywordRestParameterNode or Prism::ForwardingParameterNode or Prism::NoKeywordsParameterNode
  if node.keyword_rest.is_a?(Prism::KeywordRestParameterNode) && node.keyword_rest.name
    scope[node.keyword_rest.name.to_s] = Types::InstanceType.new(Hash, K: Types::SYMBOL, V: Types::UnionType[*kwargs.values])
  end
  if node.block&.name
    # node.block is Prism::BlockParameterNode
    scope[node.block.name.to_s] = Types::PROC
  end
end

def assign_numbered_parameters(numbered_parameters, scope, args, _kwargs)
  return if numbered_parameters.empty?
  max_num = numbered_parameters.map { _1[1].to_i }.max
  if max_num == 1
    scope['_1'] = args.first || Types::NIL
  else
    args = sized_splat(args.first, :to_ary, max_num) if args.size == 1
    numbered_parameters.each do |name|
      index = name[1].to_i - 1
      scope[name] = args[index] || Types::NIL
    end
  end
end

def evaluate_case_match(target, node, scope)
  case node
  when Prism::WhenNode
    node.conditions.each { evaluate _1, scope }
    node.statements ? evaluate(node.statements, scope) : Types::NIL
  when Prism::InNode
    pattern = node.pattern
    if pattern.is_a?(Prism::IfNode) || pattern.is_a?(Prism::UnlessNode)
      cond_node = pattern.predicate
      pattern = pattern.statements.body.first
    end
    evaluate_match_pattern(target, pattern, scope)
    evaluate cond_node, scope if cond_node # TODO: conditional branch
    node.statements ? evaluate(node.statements, scope) : Types::NIL
  end
end

def evaluate_match_pattern(value, pattern, scope)
  # TODO: scope.terminate_with Scope::PATTERNMATCH_BREAK, Types::NIL
  case pattern
  when Prism::FindPatternNode
    # TODO
    evaluate_match_pattern Types::OBJECT, pattern.left, scope
    pattern.requireds.each { evaluate_match_pattern Types::OBJECT, _1, scope }
    evaluate_match_pattern Types::OBJECT, pattern.right, scope
  when Prism::ArrayPatternNode
    # TODO
    pattern.requireds.each { evaluate_match_pattern Types::OBJECT, _1, scope }
    evaluate_match_pattern Types::OBJECT, pattern.rest, scope if pattern.rest
    pattern.posts.each { evaluate_match_pattern Types::OBJECT, _1, scope }
    Types::ARRAY
  when Prism::HashPatternNode
    # TODO
    pattern.elements.each { evaluate_match_pattern Types::OBJECT, _1, scope }
    if pattern.respond_to?(:rest) && pattern.rest
      evaluate_match_pattern Types::OBJECT, pattern.rest, scope
    end
    Types::HASH
  when Prism::AssocNode
    evaluate_match_pattern value, pattern.value, scope if pattern.value
    Types::OBJECT
  when Prism::AssocSplatNode
    # TODO
    evaluate_match_pattern Types::HASH, pattern.value, scope
    Types::OBJECT
  when Prism::PinnedVariableNode
    evaluate pattern.variable, scope
  when Prism::PinnedExpressionNode
    evaluate pattern.expression, scope
  when Prism::LocalVariableTargetNode
    scope[pattern.name.to_s] = value
  when Prism::AlternationPatternNode
    Types::UnionType[evaluate_match_pattern(value, pattern.left, scope), evaluate_match_pattern(value, pattern.right, scope)]
  when Prism::CapturePatternNode
    capture_type = class_or_value_to_instance evaluate_match_pattern(value, pattern.value, scope)
    value = capture_type unless capture_type.types.empty? || capture_type.types == [Types::OBJECT]
    evaluate_match_pattern value, pattern.target, scope
  when Prism::SplatNode
    value = Types.array_of value
    evaluate_match_pattern value, pattern.expression, scope if pattern.expression
    value
  else
    # literal node
    type = evaluate(pattern, scope)
    class_or_value_to_instance(type)
  end
end

def class_or_value_to_instance(type)
  instance_types = type.types.map do |t|
    t.is_a?(Types::SingletonType) ? Types::InstanceType.new(t.module_or_class) : t
  end
  Types::UnionType[*instance_types]
end

def evaluate_write(node, value, scope, evaluated_receivers)
  case node
  when Prism::MultiTargetNode
    evaluate_multi_write node, value, scope, evaluated_receivers
  when Prism::CallNode
    evaluated_receivers&.[](node.receiver) || evaluate(node.receiver, scope) if node.receiver
  when Prism::SplatNode
    evaluate_write node.expression, Types.array_of(value), scope, evaluated_receivers if node.expression
  when Prism::LocalVariableTargetNode, Prism::GlobalVariableTargetNode, Prism::InstanceVariableTargetNode, Prism::ClassVariableTargetNode, Prism::ConstantTargetNode
    scope[node.name.to_s] = value
  when Prism::ConstantPathTargetNode
    receiver = evaluated_receivers&.[](node.parent) || evaluate(node.parent, scope) if node.parent
    const_path_write receiver, node.child.name.to_s, value, scope
    value
  end
end

def evaluate_multi_write(node, values, scope, evaluated_receivers)
  pre_targets = node.lefts
  splat_target = node.rest
  post_targets = node.rights
  size = pre_targets.size + (splat_target ? 1 : 0) + post_targets.size
  values = values.is_a?(Array) ? values.dup : sized_splat(values, :to_ary, size)
  pre_pairs = pre_targets.zip(values.shift(pre_targets.size))
  post_pairs = post_targets.zip(values.pop(post_targets.size))
  splat_pairs = splat_target ? [[splat_target, Types::UnionType[*values]]] : []
  (pre_pairs + splat_pairs + post_pairs).each do |target, value|
    evaluate_write target, value || Types::NIL, scope, evaluated_receivers
  end
end

def evaluate_multi_write_receiver(node, scope, evaluated_receivers)
  case node
  when Prism::MultiWriteNode, Prism::MultiTargetNode
    targets = [*node.lefts, *node.rest, *node.rights]
    targets.each { evaluate_multi_write_receiver _1, scope, evaluated_receivers }
  when Prism::CallNode
    if node.receiver
      receiver = evaluate(node.receiver, scope)
      evaluated_receivers[node.receiver] = receiver if evaluated_receivers
    end
    if node.arguments
      node.arguments.arguments&.each do |arg|
        if arg.is_a? Prism::SplatNode
          evaluate arg.expression, scope
        else
          evaluate arg, scope
        end
      end
    end
  when Prism::SplatNode
    evaluate_multi_write_receiver node.expression, scope, evaluated_receivers if node.expression
  end
end

def evaluate_list_splat_items(list, scope)
  items = list.flat_map do |node|
    if node.is_a? Prism::SplatNode
      next unless node.expression # def f(*); [*]

      splat = evaluate node.expression, scope
      array_elem, non_array = partition_to_array splat.nonnillable, :to_a
      [*array_elem, *non_array]
    else
      evaluate node, scope
    end
  end.compact.uniq
  Types::UnionType[*items]
end

def sized_splat(value, method, size)
  array_elem, non_array = partition_to_array value, method
  values = [Types::UnionType[*array_elem, *non_array]]
  values += [array_elem] * (size - 1) if array_elem && size >= 1
  values
end

def partition_to_array(value, method)
  arrays, non_arrays = value.types.partition { _1.is_a?(Types::InstanceType) && _1.klass == Array }
  non_arrays.select! do |type|
    to_array_result = method_call type, method, [], nil, nil, nil, name_match: false
    if to_array_result.is_a?(Types::InstanceType) && to_array_result.klass == Array
      arrays << to_array_result
      false
    else
      true
    end
  end
  array_elem = arrays.empty? ? nil : Types::UnionType[*arrays.map { _1.params[:Elem] || Types::OBJECT }]
  non_array = non_arrays.empty? ? nil : Types::UnionType[*non_arrays]
  [array_elem, non_array]
end

def method_call(receiver, method_name, args, kwargs, block, scope, name_match: true)
  methods = Types.rbs_methods receiver, method_name.to_sym, args, kwargs, !!block
  block_called = false
  type_breaks = methods.map do |method, given_params, method_params|
    receiver_vars = receiver.is_a?(Types::InstanceType) ? receiver.params : {}
    free_vars = method.type.free_variables - receiver_vars.keys.to_set
    vars = receiver_vars.merge Types.match_free_variables(free_vars, method_params, given_params)
    if block && method.block
      params_type = method.block.type.required_positionals.map do |func_param|
        Types.from_rbs_type func_param.type, receiver, vars
      end
      self_type = Types.from_rbs_type method.block.self_type, receiver, vars if method.block.self_type
      block_response, breaks = block.call params_type, self_type
      block_called = true
      vars.merge! Types.match_free_variables(free_vars - vars.keys.to_set, [method.block.type.return_type], [block_response])
    end
    if Types.method_return_bottom?(method)
      [nil, breaks]
    else
      [Types.from_rbs_type(method.type.return_type, receiver, vars || {}), breaks]
    end
  end
  block&.call [], nil unless block_called
  terminates = !type_breaks.empty? && type_breaks.map(&:first).all?(&:nil?)
  types = type_breaks.map(&:first).compact
  breaks = type_breaks.map(&:last).compact
  types << OBJECT_METHODS[method_name.to_sym] if name_match && OBJECT_METHODS.has_key?(method_name.to_sym)

  if method_name.to_sym == :new
    receiver.types.each do |type|
      if type.is_a?(Types::SingletonType) && type.module_or_class.is_a?(Class)
        types << Types::InstanceType.new(type.module_or_class)
      end
    end
  end
  scope&.terminate if terminates && breaks.empty?
  Types::UnionType[*types, *breaks]
end

def self.calculate_target_type_scope(binding, parents, target)
  dig_targets = DigTarget.new(parents, target) do |type, scope|
    return

# File irb/type_completion/type_analyzer.rb, line 43
def evaluate(node, scope)
  method = "evaluate_#{node.type}"
  if respond_to? method
    result = send method, node, scope
  else
    result = Types::NIL
  end
  @dig_targets.resolve result, scope if @dig_targets.target? node
  result
end

# File irb/type_completion/type_analyzer.rb, line 790
      def evaluate_alias_global_variable_node(_node, _scope) = Types::NIL
      def evaluate_undef_node(_node, _scope) = Types::NIL
      def evaluate_missing_node(_node, _scope) = Types::NIL

      def evaluate_call_node_arguments(call_node, scope)
        # call_node.arguments is Prism::ArgumentsNode
        arguments = call_node.arguments&.arguments&.dup || []
        block_arg = call_node.block.expression if call_node.block.is_a?(Prism::BlockArgumentNode)
        kwargs = arguments.pop.elements if arguments.last.is_a?(Prism::KeywordHashNode)
        args_types = arguments.map do |arg|
          case arg
          when Prism::ForwardingArgumentsNode
            # `f(a, ...)` treat like splat
            nil
          when Prism::SplatNode
            evaluate arg.expression, scope if arg.expression
            nil # TODO: splat
          else
            evaluate arg, scope
          end
        end
        if kwargs
          kwargs_types = kwargs.map do |arg|
            case arg
            when Prism::AssocNode
              if arg.key.is_a?(Prism::SymbolNode)
                [arg.key.value, evaluate(arg.value, scope)]
              else
                evaluate arg.key, scope
                evaluate arg.value, scope
                nil
              end
            when Prism::AssocSplatNode
              evaluate arg.value, scope if arg.value
              nil
            end
          end.compact.to_h
        end
        if block_arg.is_a? Prism::SymbolNode
          block_sym_node = block_arg
        elsif block_arg
          evaluate block_arg, scope
        end
        [args_types, kwargs_types, block_sym_node, !!block_arg]
      end

      def const_path_write(receiver, name, value, scope)
        if receiver # receiver::A = value
          singleton_type = receiver.types.find { _1.is_a? Types::SingletonType }
          scope.set_const singleton_type.module_or_class, name, value if singleton_type
        else # ::A = value
          scope.set_const Object, name, value
        end
      end

      def assign_required_parameter(node, value, scope)
        case node
        when Prism::RequiredParameterNode
          scope[node.name.to_s] = value || Types::OBJECT
        when Prism::MultiTargetNode
          parameters = [*node.lefts, *node.rest, *node.rights]
          values = value ? sized_splat(value, :to_ary, parameters.size) : []
          parameters.zip values do |n, v|
            assign_required_parameter n, v, scope
          end
        when Prism::SplatNode
          splat_value = value ? Types.array_of(value) : Types::ARRAY
          assign_required_parameter node.expression, splat_value, scope if node.expression
        end
      end

      def evaluate_constant_node_info(node, scope)
        case node
        when Prism::ConstantPathNode
          name = node.child.name.to_s
          if node.parent
            receiver = evaluate node.parent, scope
            if receiver.is_a? Types::SingletonType
              parent_module = receiver.module_or_class
            end
          else
            parent_module = Object
          end
          if parent_module
            type = scope.get_const(parent_module, [name]) || Types::NIL
          else
            parent_module = :unknown
            type = Types::NIL
          end
        when Prism::ConstantReadNode
          name = node.name.to_s
          type = scope[name]
        end
        @dig_targets.resolve type, scope if @dig_targets.target? node
        [type, receiver, parent_module, name]
      end


      def assign_parameters(node, scope, args, kwargs)
        args = args.dup
        kwargs = kwargs.dup
        size = node.requireds.size + node.optionals.size + (node.rest ? 1 : 0) + node.posts.size
        args = sized_splat(args.first, :to_ary, size) if size >= 2 && args.size == 1
        reqs = args.shift node.requireds.size
        if node.rest
          # node.rest is Prism::RestParameterNode
          posts = []
          opts = args.shift node.optionals.size
          rest = args
        else
          posts = args.pop node.posts.size
          opts = args
          rest = []
        end
        node.requireds.zip reqs do |n, v|
          assign_required_parameter n, v, scope
        end
        node.optionals.zip opts do |n, v|
          # n is Prism::OptionalParameterNode
          values = [v]
          values << evaluate(n.value, scope) if n.value
          scope[n.name.to_s] = Types::UnionType[*values.compact]
        end
        node.posts.zip posts do |n, v|
          assign_required_parameter n, v, scope
        end
        if node.rest&.name
          # node.rest is Prism::RestParameterNode
          scope[node.rest.name.to_s] = Types.array_of(*rest)
        end
        node.keywords.each do |n|
          name = n.name.to_s.delete(':')
          values = [kwargs.delete(name)]
          # n is Prism::OptionalKeywordParameterNode (has n.value) or Prism::RequiredKeywordParameterNode (does not have n.value)
          values << evaluate(n.value, scope) if n.respond_to?(:value)
          scope[name] = Types::UnionType[*values.compact]
        end
        # node.keyword_rest is Prism::KeywordRestParameterNode or Prism::ForwardingParameterNode or Prism::NoKeywordsParameterNode
        if node.keyword_rest.is_a?(Prism::KeywordRestParameterNode) && node.keyword_rest.name
          scope[node.keyword_rest.name.to_s] = Types::InstanceType.new(Hash, K: Types::SYMBOL, V: Types::UnionType[*kwargs.values])
        end
        if node.block&.name
          # node.block is Prism::BlockParameterNode
          scope[node.block.name.to_s] = Types::PROC
        end
      end

      def assign_numbered_parameters(numbered_parameters, scope, args, _kwargs)
        return if numbered_parameters.empty?
        max_num = numbered_parameters.map { _1[1].to_i }.max
        if max_num == 1
          scope['_1'] = args.first || Types::NIL
        else
          args = sized_splat(args.first, :to_ary, max_num) if args.size == 1
          numbered_parameters.each do |name|
            index = name[1].to_i - 1
            scope[name] = args[index] || Types::NIL
          end
        end
      end

      def evaluate_case_match(target, node, scope)
        case node
        when Prism::WhenNode
          node.conditions.each { evaluate _1, scope }
          node.statements ? evaluate(node.statements, scope) : Types::NIL
        when Prism::InNode
          pattern = node.pattern
          if pattern.is_a?(Prism::IfNode) || pattern.is_a?(Prism::UnlessNode)
            cond_node = pattern.predicate
            pattern = pattern.statements.body.first
          end
          evaluate_match_pattern(target, pattern, scope)
          evaluate cond_node, scope if cond_node # TODO: conditional branch
          node.statements ? evaluate(node.statements, scope) : Types::NIL
        end
      end

      def evaluate_match_pattern(value, pattern, scope)
        # TODO: scope.terminate_with Scope::PATTERNMATCH_BREAK, Types::NIL
        case pattern
        when Prism::FindPatternNode
          # TODO
          evaluate_match_pattern Types::OBJECT, pattern.left, scope
          pattern.requireds.each { evaluate_match_pattern Types::OBJECT, _1, scope }
          evaluate_match_pattern Types::OBJECT, pattern.right, scope
        when Prism::ArrayPatternNode
          # TODO
          pattern.requireds.each { evaluate_match_pattern Types::OBJECT, _1, scope }
          evaluate_match_pattern Types::OBJECT, pattern.rest, scope if pattern.rest
          pattern.posts.each { evaluate_match_pattern Types::OBJECT, _1, scope }
          Types::ARRAY
        when Prism::HashPatternNode
          # TODO
          pattern.elements.each { evaluate_match_pattern Types::OBJECT, _1, scope }
          if pattern.respond_to?(:rest) && pattern.rest
            evaluate_match_pattern Types::OBJECT, pattern.rest, scope
          end
          Types::HASH
        when Prism::AssocNode
          evaluate_match_pattern value, pattern.value, scope if pattern.value
          Types::OBJECT
        when Prism::AssocSplatNode
          # TODO
          evaluate_match_pattern Types::HASH, pattern.value, scope
          Types::OBJECT
        when Prism::PinnedVariableNode
          evaluate pattern.variable, scope
        when Prism::PinnedExpressionNode
          evaluate pattern.expression, scope
        when Prism::LocalVariableTargetNode
          scope[pattern.name.to_s] = value
        when Prism::AlternationPatternNode
          Types::UnionType[evaluate_match_pattern(value, pattern.left, scope), evaluate_match_pattern(value, pattern.right, scope)]
        when Prism::CapturePatternNode
          capture_type = class_or_value_to_instance evaluate_match_pattern(value, pattern.value, scope)
          value = capture_type unless capture_type.types.empty? || capture_type.types == [Types::OBJECT]
          evaluate_match_pattern value, pattern.target, scope
        when Prism::SplatNode
          value = Types.array_of value
          evaluate_match_pattern value, pattern.expression, scope if pattern.expression
          value
        else
          # literal node
          type = evaluate(pattern, scope)
          class_or_value_to_instance(type)
        end
      end

      def class_or_value_to_instance(type)
        instance_types = type.types.map do |t|
          t.is_a?(Types::SingletonType) ? Types::InstanceType.new(t.module_or_class) : t
        end
        Types::UnionType[*instance_types]
      end

      def evaluate_write(node, value, scope, evaluated_receivers)
        case node
        when Prism::MultiTargetNode
          evaluate_multi_write node, value, scope, evaluated_receivers
        when Prism::CallNode
          evaluated_receivers&.[](node.receiver) || evaluate(node.receiver, scope) if node.receiver
        when Prism::SplatNode
          evaluate_write node.expression, Types.array_of(value), scope, evaluated_receivers if node.expression
        when Prism::LocalVariableTargetNode, Prism::GlobalVariableTargetNode, Prism::InstanceVariableTargetNode, Prism::ClassVariableTargetNode, Prism::ConstantTargetNode
          scope[node.name.to_s] = value
        when Prism::ConstantPathTargetNode
          receiver = evaluated_receivers&.[](node.parent) || evaluate(node.parent, scope) if node.parent
          const_path_write receiver, node.child.name.to_s, value, scope
          value
        end
      end

      def evaluate_multi_write(node, values, scope, evaluated_receivers)
        pre_targets = node.lefts
        splat_target = node.rest
        post_targets = node.rights
        size = pre_targets.size + (splat_target ? 1 : 0) + post_targets.size
        values = values.is_a?(Array) ? values.dup : sized_splat(values, :to_ary, size)
        pre_pairs = pre_targets.zip(values.shift(pre_targets.size))
        post_pairs = post_targets.zip(values.pop(post_targets.size))
        splat_pairs = splat_target ? [[splat_target, Types::UnionType[*values]]] : []
        (pre_pairs + splat_pairs + post_pairs).each do |target, value|
          evaluate_write target, value || Types::NIL, scope, evaluated_receivers
        end
      end

      def evaluate_multi_write_receiver(node, scope, evaluated_receivers)
        case node
        when Prism::MultiWriteNode, Prism::MultiTargetNode
          targets = [*node.lefts, *node.rest, *node.rights]
          targets.each { evaluate_multi_write_receiver _1, scope, evaluated_receivers }
        when Prism::CallNode
          if node.receiver
            receiver = evaluate(node.receiver, scope)
            evaluated_receivers[node.receiver] = receiver if evaluated_receivers
          end
          if node.arguments
            node.arguments.arguments&.each do |arg|
              if arg.is_a? Prism::SplatNode
                evaluate arg.expression, scope
              else
                evaluate arg, scope
              end
            end
          end
        when Prism::SplatNode
          evaluate_multi_write_receiver node.expression, scope, evaluated_receivers if node.expression
        end
      end

      def evaluate_list_splat_items(list, scope)
        items = list.flat_map do |node|
          if node.is_a? Prism::SplatNode
            next unless node.expression # def f(*); [*]

            splat = evaluate node.expression, scope
            array_elem, non_array = partition_to_array splat.nonnillable, :to_a
            [*array_elem, *non_array]
          else
            evaluate node, scope
          end
        end.compact.uniq
        Types::UnionType[*items]
      end

      def sized_splat(value, method, size)
        array_elem, non_array = partition_to_array value, method
        values = [Types::UnionType[*array_elem, *non_array]]
        values += [array_elem] * (size - 1) if array_elem && size >= 1
        values
      end

      def partition_to_array(value, method)
        arrays, non_arrays = value.types.partition { _1.is_a?(Types::InstanceType) && _1.klass == Array }
        non_arrays.select! do |type|
          to_array_result = method_call type, method, [], nil, nil, nil, name_match: false
          if to_array_result.is_a?(Types::InstanceType) && to_array_result.klass == Array
            arrays << to_array_result
            false
          else
            true
          end
        end
        array_elem = arrays.empty? ? nil : Types::UnionType[*arrays.map { _1.params[:Elem] || Types::OBJECT }]
        non_array = non_arrays.empty? ? nil : Types::UnionType[*non_arrays]
        [array_elem, non_array]
      end

      def method_call(receiver, method_name, args, kwargs, block, scope, name_match: true)
        methods = Types.rbs_methods receiver, method_name.to_sym, args, kwargs, !!block
        block_called = false
        type_breaks = methods.map do |method, given_params, method_params|
          receiver_vars = receiver.is_a?(Types::InstanceType) ? receiver.params : {}
          free_vars = method.type.free_variables - receiver_vars.keys.to_set
          vars = receiver_vars.merge Types.match_free_variables(free_vars, method_params, given_params)
          if block && method.block
            params_type = method.block.type.required_positionals.map do |func_param|
              Types.from_rbs_type func_param.type, receiver, vars
            end
            self_type = Types.from_rbs_type method.block.self_type, receiver, vars if method.block.self_type
            block_response, breaks = block.call params_type, self_type
            block_called = true
            vars.merge! Types.match_free_variables(free_vars - vars.keys.to_set, [method.block.type.return_type], [block_response])
          end
          if Types.method_return_bottom?(method)
            [nil, breaks]
          else
            [Types.from_rbs_type(method.type.return_type, receiver, vars || {}), breaks]
          end
        end
        block&.call [], nil unless block_called
        terminates = !type_breaks.empty? && type_breaks.map(&:first).all?(&:nil?)
        types = type_breaks.map(&:first).compact
        breaks = type_breaks.map(&:last).compact
        types << OBJECT_METHODS[method_name.to_sym] if name_match && OBJECT_METHODS.has_key?(method_name.to_sym)

        if method_name.to_sym == :new
          receiver.types.each do |type|
            if type.is_a?(Types::SingletonType) && type.module_or_class.is_a?(Class)
              types << Types::InstanceType.new(type.module_or_class)
            end
          end
        end
        scope&.terminate if terminates && breaks.empty?
        Types::UnionType[*types, *breaks]
      end

      def self.calculate_target_type_scope(binding, parents, target)
        dig_targets = DigTarget.new(parents, target) do |type, scope|
          return type, scope
        end
        program = parents.first
        scope = Scope.from_binding(binding, program.locals)
        new(dig_targets).evaluate program, scope
        [Types::NIL, scope]
      end
    end
  end
end

# File irb/type_completion/type_analyzer.rb, line 789
    def evaluate_alias_method_node(_node, _scope) = Types::NIL
    def evaluate_alias_global_variable_node(_node, _scope) = Types::NIL
    def evaluate_undef_node(_node, _scope) = Types::NIL
    def evaluate_missing_node(_node, _scope) = Types::NIL

    def evaluate_call_node_arguments(call_node, scope)
      # call_node.arguments is Prism::ArgumentsNode
      arguments = call_node.arguments&.arguments&.dup || []
      block_arg = call_node.block.expression if call_node.block.is_a?(Prism::BlockArgumentNode)
      kwargs = arguments.pop.elements if arguments.last.is_a?(Prism::KeywordHashNode)
      args_types = arguments.map do |arg|
        case arg
        when Prism::ForwardingArgumentsNode
          # `f(a, ...)` treat like splat
          nil
        when Prism::SplatNode
          evaluate arg.expression, scope if arg.expression
          nil # TODO: splat
        else
          evaluate arg, scope
        end
      end
      if kwargs
        kwargs_types = kwargs.map do |arg|
          case arg
          when Prism::AssocNode
            if arg.key.is_a?(Prism::SymbolNode)
              [arg.key.value, evaluate(arg.value, scope)]
            else
              evaluate arg.key, scope
              evaluate arg.value, scope
              nil
            end
          when Prism::AssocSplatNode
            evaluate arg.value, scope if arg.value
            nil
          end
        end.compact.to_h
      end
      if block_arg.is_a? Prism::SymbolNode
        block_sym_node = block_arg
      elsif block_arg
        evaluate block_arg, scope
      end
      [args_types, kwargs_types, block_sym_node, !!block_arg]
    end

    def const_path_write(receiver, name, value, scope)
      if receiver # receiver::A = value
        singleton_type = receiver.types.find { _1.is_a? Types::SingletonType }
        scope.set_const singleton_type.module_or_class, name, value if singleton_type
      else # ::A = value
        scope.set_const Object, name, value
      end
    end

    def assign_required_parameter(node, value, scope)
      case node
      when Prism::RequiredParameterNode
        scope[node.name.to_s] = value || Types::OBJECT
      when Prism::MultiTargetNode
        parameters = [*node.lefts, *node.rest, *node.rights]
        values = value ? sized_splat(value, :to_ary, parameters.size) : []
        parameters.zip values do |n, v|
          assign_required_parameter n, v, scope
        end
      when Prism::SplatNode
        splat_value = value ? Types.array_of(value) : Types::ARRAY
        assign_required_parameter node.expression, splat_value, scope if node.expression
      end
    end

    def evaluate_constant_node_info(node, scope)
      case node
      when Prism::ConstantPathNode
        name = node.child.name.to_s
        if node.parent
          receiver = evaluate node.parent, scope
          if receiver.is_a? Types::SingletonType
            parent_module = receiver.module_or_class
          end
        else
          parent_module = Object
        end
        if parent_module
          type = scope.get_const(parent_module, [name]) || Types::NIL
        else
          parent_module = :unknown
          type = Types::NIL
        end
      when Prism::ConstantReadNode
        name = node.name.to_s
        type = scope[name]
      end
      @dig_targets.resolve type, scope if @dig_targets.target? node
      [type, receiver, parent_module, name]
    end


    def assign_parameters(node, scope, args, kwargs)
      args = args.dup
      kwargs = kwargs.dup
      size = node.requireds.size + node.optionals.size + (node.rest ? 1 : 0) + node.posts.size
      args = sized_splat(args.first, :to_ary, size) if size >= 2 && args.size == 1
      reqs = args.shift node.requireds.size
      if node.rest
        # node.rest is Prism::RestParameterNode
        posts = []
        opts = args.shift node.optionals.size
        rest = args
      else
        posts = args.pop node.posts.size
        opts = args
        rest = []
      end
      node.requireds.zip reqs do |n, v|
        assign_required_parameter n, v, scope
      end
      node.optionals.zip opts do |n, v|
        # n is Prism::OptionalParameterNode
        values = [v]
        values << evaluate(n.value, scope) if n.value
        scope[n.name.to_s] = Types::UnionType[*values.compact]
      end
      node.posts.zip posts do |n, v|
        assign_required_parameter n, v, scope
      end
      if node.rest&.name
        # node.rest is Prism::RestParameterNode
        scope[node.rest.name.to_s] = Types.array_of(*rest)
      end
      node.keywords.each do |n|
        name = n.name.to_s.delete(':')
        values = [kwargs.delete(name)]
        # n is Prism::OptionalKeywordParameterNode (has n.value) or Prism::RequiredKeywordParameterNode (does not have n.value)
        values << evaluate(n.value, scope) if n.respond_to?(:value)
        scope[name] = Types::UnionType[*values.compact]
      end
      # node.keyword_rest is Prism::KeywordRestParameterNode or Prism::ForwardingParameterNode or Prism::NoKeywordsParameterNode
      if node.keyword_rest.is_a?(Prism::KeywordRestParameterNode) && node.keyword_rest.name
        scope[node.keyword_rest.name.to_s] = Types::InstanceType.new(Hash, K: Types::SYMBOL, V: Types::UnionType[*kwargs.values])
      end
      if node.block&.name
        # node.block is Prism::BlockParameterNode
        scope[node.block.name.to_s] = Types::PROC
      end
    end

    def assign_numbered_parameters(numbered_parameters, scope, args, _kwargs)
      return if numbered_parameters.empty?
      max_num = numbered_parameters.map { _1[1].to_i }.max
      if max_num == 1
        scope['_1'] = args.first || Types::NIL
      else
        args = sized_splat(args.first, :to_ary, max_num) if args.size == 1
        numbered_parameters.each do |name|
          index = name[1].to_i - 1
          scope[name] = args[index] || Types::NIL
        end
      end
    end

    def evaluate_case_match(target, node, scope)
      case node
      when Prism::WhenNode
        node.conditions.each { evaluate _1, scope }
        node.statements ? evaluate(node.statements, scope) : Types::NIL
      when Prism::InNode
        pattern = node.pattern
        if pattern.is_a?(Prism::IfNode) || pattern.is_a?(Prism::UnlessNode)
          cond_node = pattern.predicate
          pattern = pattern.statements.body.first
        end
        evaluate_match_pattern(target, pattern, scope)
        evaluate cond_node, scope if cond_node # TODO: conditional branch
        node.statements ? evaluate(node.statements, scope) : Types::NIL
      end
    end

    def evaluate_match_pattern(value, pattern, scope)
      # TODO: scope.terminate_with Scope::PATTERNMATCH_BREAK, Types::NIL
      case pattern
      when Prism::FindPatternNode
        # TODO
        evaluate_match_pattern Types::OBJECT, pattern.left, scope
        pattern.requireds.each { evaluate_match_pattern Types::OBJECT, _1, scope }
        evaluate_match_pattern Types::OBJECT, pattern.right, scope
      when Prism::ArrayPatternNode
        # TODO
        pattern.requireds.each { evaluate_match_pattern Types::OBJECT, _1, scope }
        evaluate_match_pattern Types::OBJECT, pattern.rest, scope if pattern.rest
        pattern.posts.each { evaluate_match_pattern Types::OBJECT, _1, scope }
        Types::ARRAY
      when Prism::HashPatternNode
        # TODO
        pattern.elements.each { evaluate_match_pattern Types::OBJECT, _1, scope }
        if pattern.respond_to?(:rest) && pattern.rest
          evaluate_match_pattern Types::OBJECT, pattern.rest, scope
        end
        Types::HASH
      when Prism::AssocNode
        evaluate_match_pattern value, pattern.value, scope if pattern.value
        Types::OBJECT
      when Prism::AssocSplatNode
        # TODO
        evaluate_match_pattern Types::HASH, pattern.value, scope
        Types::OBJECT
      when Prism::PinnedVariableNode
        evaluate pattern.variable, scope
      when Prism::PinnedExpressionNode
        evaluate pattern.expression, scope
      when Prism::LocalVariableTargetNode
        scope[pattern.name.to_s] = value
      when Prism::AlternationPatternNode
        Types::UnionType[evaluate_match_pattern(value, pattern.left, scope), evaluate_match_pattern(value, pattern.right, scope)]
      when Prism::CapturePatternNode
        capture_type = class_or_value_to_instance evaluate_match_pattern(value, pattern.value, scope)
        value = capture_type unless capture_type.types.empty? || capture_type.types == [Types::OBJECT]
        evaluate_match_pattern value, pattern.target, scope
      when Prism::SplatNode
        value = Types.array_of value
        evaluate_match_pattern value, pattern.expression, scope if pattern.expression
        value
      else
        # literal node
        type = evaluate(pattern, scope)
        class_or_value_to_instance(type)
      end
    end

    def class_or_value_to_instance(type)
      instance_types = type.types.map do |t|
        t.is_a?(Types::SingletonType) ? Types::InstanceType.new(t.module_or_class) : t
      end
      Types::UnionType[*instance_types]
    end

    def evaluate_write(node, value, scope, evaluated_receivers)
      case node
      when Prism::MultiTargetNode
        evaluate_multi_write node, value, scope, evaluated_receivers
      when Prism::CallNode
        evaluated_receivers&.[](node.receiver) || evaluate(node.receiver, scope) if node.receiver
      when Prism::SplatNode
        evaluate_write node.expression, Types.array_of(value), scope, evaluated_receivers if node.expression
      when Prism::LocalVariableTargetNode, Prism::GlobalVariableTargetNode, Prism::InstanceVariableTargetNode, Prism::ClassVariableTargetNode, Prism::ConstantTargetNode
        scope[node.name.to_s] = value
      when Prism::ConstantPathTargetNode
        receiver = evaluated_receivers&.[](node.parent) || evaluate(node.parent, scope) if node.parent
        const_path_write receiver, node.child.name.to_s, value, scope
        value
      end
    end

    def evaluate_multi_write(node, values, scope, evaluated_receivers)
      pre_targets = node.lefts
      splat_target = node.rest
      post_targets = node.rights
      size = pre_targets.size + (splat_target ? 1 : 0) + post_targets.size
      values = values.is_a?(Array) ? values.dup : sized_splat(values, :to_ary, size)
      pre_pairs = pre_targets.zip(values.shift(pre_targets.size))
      post_pairs = post_targets.zip(values.pop(post_targets.size))
      splat_pairs = splat_target ? [[splat_target, Types::UnionType[*values]]] : []
      (pre_pairs + splat_pairs + post_pairs).each do |target, value|
        evaluate_write target, value || Types::NIL, scope, evaluated_receivers
      end
    end

    def evaluate_multi_write_receiver(node, scope, evaluated_receivers)
      case node
      when Prism::MultiWriteNode, Prism::MultiTargetNode
        targets = [*node.lefts, *node.rest, *node.rights]
        targets.each { evaluate_multi_write_receiver _1, scope, evaluated_receivers }
      when Prism::CallNode
        if node.receiver
          receiver = evaluate(node.receiver, scope)
          evaluated_receivers[node.receiver] = receiver if evaluated_receivers
        end
        if node.arguments
          node.arguments.arguments&.each do |arg|
            if arg.is_a? Prism::SplatNode
              evaluate arg.expression, scope
            else
              evaluate arg, scope
            end
          end
        end
      when Prism::SplatNode
        evaluate_multi_write_receiver node.expression, scope, evaluated_receivers if node.expression
      end
    end

    def evaluate_list_splat_items(list, scope)
      items = list.flat_map do |node|
        if node.is_a? Prism::SplatNode
          next unless node.expression # def f(*); [*]

          splat = evaluate node.expression, scope
          array_elem, non_array = partition_to_array splat.nonnillable, :to_a
          [*array_elem, *non_array]
        else
          evaluate node, scope
        end
      end.compact.uniq
      Types::UnionType[*items]
    end

    def sized_splat(value, method, size)
      array_elem, non_array = partition_to_array value, method
      values = [Types::UnionType[*array_elem, *non_array]]
      values += [array_elem] * (size - 1) if array_elem && size >= 1
      values
    end

    def partition_to_array(value, method)
      arrays, non_arrays = value.types.partition { _1.is_a?(Types::InstanceType) && _1.klass == Array }
      non_arrays.select! do |type|
        to_array_result = method_call type, method, [], nil, nil, nil, name_match: false
        if to_array_result.is_a?(Types::InstanceType) && to_array_result.klass == Array
          arrays << to_array_result
          false
        else
          true
        end
      end
      array_elem = arrays.empty? ? nil : Types::UnionType[*arrays.map { _1.params[:Elem] || Types::OBJECT }]
      non_array = non_arrays.empty? ? nil : Types::UnionType[*non_arrays]
      [array_elem, non_array]
    end

    def method_call(receiver, method_name, args, kwargs, block, scope, name_match: true)
      methods = Types.rbs_methods receiver, method_name.to_sym, args, kwargs, !!block
      block_called = false
      type_breaks = methods.map do |method, given_params, method_params|
        receiver_vars = receiver.is_a?(Types::InstanceType) ? receiver.params : {}
        free_vars = method.type.free_variables - receiver_vars.keys.to_set
        vars = receiver_vars.merge Types.match_free_variables(free_vars, method_params, given_params)
        if block && method.block
          params_type = method.block.type.required_positionals.map do |func_param|
            Types.from_rbs_type func_param.type, receiver, vars
          end
          self_type = Types.from_rbs_type method.block.self_type, receiver, vars if method.block.self_type
          block_response, breaks = block.call params_type, self_type
          block_called = true
          vars.merge! Types.match_free_variables(free_vars - vars.keys.to_set, [method.block.type.return_type], [block_response])
        end
        if Types.method_return_bottom?(method)
          [nil, breaks]
        else
          [Types.from_rbs_type(method.type.return_type, receiver, vars || {}), breaks]
        end
      end
      block&.call [], nil unless block_called
      terminates = !type_breaks.empty? && type_breaks.map(&:first).all?(&:nil?)
      types = type_breaks.map(&:first).compact
      breaks = type_breaks.map(&:last).compact
      types << OBJECT_METHODS[method_name.to_sym] if name_match && OBJECT_METHODS.has_key?(method_name.to_sym)

      if method_name.to_sym == :new
        receiver.types.each do |type|
          if type.is_a?(Types::SingletonType) && type.module_or_class.is_a?(Class)
            types << Types::InstanceType.new(type.module_or_class)
          end
        end
      end
      scope&.terminate if terminates && breaks.empty?
      Types::UnionType[*types, *breaks]
    end

    def self.calculate_target_type_scope(binding, parents, target)
      dig_targets = DigTarget.new(parents, target) do |type, scope|
        return type, scope
      end
      program = parents.first
      scope = Scope.from_binding(binding, program.locals)
      new(dig_targets).evaluate program, scope
      [Types::NIL, scope]
    end
  end
end