module Prism::Reflection
The Reflection
module provides the ability to reflect on the structure of the syntax tree itself, as opposed to looking at a single syntax tree. This is useful in metaprogramming contexts.
Public Class Methods
fields_for(node)
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Returns the fields for the given node.
# File prism/reflection.rb, line 104 def self.fields_for(node) case node.type when :alias_global_variable_node [NodeField.new(:new_name), NodeField.new(:old_name), LocationField.new(:keyword_loc)] when :alias_method_node [NodeField.new(:new_name), NodeField.new(:old_name), LocationField.new(:keyword_loc)] when :alternation_pattern_node [NodeField.new(:left), NodeField.new(:right), LocationField.new(:operator_loc)] when :and_node [NodeField.new(:left), NodeField.new(:right), LocationField.new(:operator_loc)] when :arguments_node [FlagsField.new(:flags, [:contains_keywords?, :contains_keyword_splat?]), NodeListField.new(:arguments)] when :array_node [FlagsField.new(:flags, [:contains_splat?]), NodeListField.new(:elements), OptionalLocationField.new(:opening_loc), OptionalLocationField.new(:closing_loc)] when :array_pattern_node [OptionalNodeField.new(:constant), NodeListField.new(:requireds), OptionalNodeField.new(:rest), NodeListField.new(:posts), OptionalLocationField.new(:opening_loc), OptionalLocationField.new(:closing_loc)] when :assoc_node [NodeField.new(:key), NodeField.new(:value), OptionalLocationField.new(:operator_loc)] when :assoc_splat_node [OptionalNodeField.new(:value), LocationField.new(:operator_loc)] when :back_reference_read_node [ConstantField.new(:name)] when :begin_node [OptionalLocationField.new(:begin_keyword_loc), OptionalNodeField.new(:statements), OptionalNodeField.new(:rescue_clause), OptionalNodeField.new(:else_clause), OptionalNodeField.new(:ensure_clause), OptionalLocationField.new(:end_keyword_loc)] when :block_argument_node [OptionalNodeField.new(:expression), LocationField.new(:operator_loc)] when :block_local_variable_node [FlagsField.new(:flags, [:repeated_parameter?]), ConstantField.new(:name)] when :block_node [ConstantListField.new(:locals), OptionalNodeField.new(:parameters), OptionalNodeField.new(:body), LocationField.new(:opening_loc), LocationField.new(:closing_loc)] when :block_parameter_node [FlagsField.new(:flags, [:repeated_parameter?]), OptionalConstantField.new(:name), OptionalLocationField.new(:name_loc), LocationField.new(:operator_loc)] when :block_parameters_node [OptionalNodeField.new(:parameters), NodeListField.new(:locals), OptionalLocationField.new(:opening_loc), OptionalLocationField.new(:closing_loc)] when :break_node [OptionalNodeField.new(:arguments), LocationField.new(:keyword_loc)] when :call_and_write_node [FlagsField.new(:flags, [:safe_navigation?, :variable_call?, :attribute_write?, :ignore_visibility?]), OptionalNodeField.new(:receiver), OptionalLocationField.new(:call_operator_loc), OptionalLocationField.new(:message_loc), ConstantField.new(:read_name), ConstantField.new(:write_name), LocationField.new(:operator_loc), NodeField.new(:value)] when :call_node [FlagsField.new(:flags, [:safe_navigation?, :variable_call?, :attribute_write?, :ignore_visibility?]), OptionalNodeField.new(:receiver), OptionalLocationField.new(:call_operator_loc), ConstantField.new(:name), OptionalLocationField.new(:message_loc), OptionalLocationField.new(:opening_loc), OptionalNodeField.new(:arguments), OptionalLocationField.new(:closing_loc), OptionalNodeField.new(:block)] when :call_operator_write_node [FlagsField.new(:flags, [:safe_navigation?, :variable_call?, :attribute_write?, :ignore_visibility?]), OptionalNodeField.new(:receiver), OptionalLocationField.new(:call_operator_loc), OptionalLocationField.new(:message_loc), ConstantField.new(:read_name), ConstantField.new(:write_name), ConstantField.new(:binary_operator), LocationField.new(:binary_operator_loc), NodeField.new(:value)] when :call_or_write_node [FlagsField.new(:flags, [:safe_navigation?, :variable_call?, :attribute_write?, :ignore_visibility?]), OptionalNodeField.new(:receiver), OptionalLocationField.new(:call_operator_loc), OptionalLocationField.new(:message_loc), ConstantField.new(:read_name), ConstantField.new(:write_name), LocationField.new(:operator_loc), NodeField.new(:value)] when :call_target_node [FlagsField.new(:flags, [:safe_navigation?, :variable_call?, :attribute_write?, :ignore_visibility?]), NodeField.new(:receiver), LocationField.new(:call_operator_loc), ConstantField.new(:name), LocationField.new(:message_loc)] when :capture_pattern_node [NodeField.new(:value), NodeField.new(:target), LocationField.new(:operator_loc)] when :case_match_node [OptionalNodeField.new(:predicate), NodeListField.new(:conditions), OptionalNodeField.new(:consequent), LocationField.new(:case_keyword_loc), LocationField.new(:end_keyword_loc)] when :case_node [OptionalNodeField.new(:predicate), NodeListField.new(:conditions), OptionalNodeField.new(:consequent), LocationField.new(:case_keyword_loc), LocationField.new(:end_keyword_loc)] when :class_node [ConstantListField.new(:locals), LocationField.new(:class_keyword_loc), NodeField.new(:constant_path), OptionalLocationField.new(:inheritance_operator_loc), OptionalNodeField.new(:superclass), OptionalNodeField.new(:body), LocationField.new(:end_keyword_loc), ConstantField.new(:name)] when :class_variable_and_write_node [ConstantField.new(:name), LocationField.new(:name_loc), LocationField.new(:operator_loc), NodeField.new(:value)] when :class_variable_operator_write_node [ConstantField.new(:name), LocationField.new(:name_loc), LocationField.new(:binary_operator_loc), NodeField.new(:value), ConstantField.new(:binary_operator)] when :class_variable_or_write_node [ConstantField.new(:name), LocationField.new(:name_loc), LocationField.new(:operator_loc), NodeField.new(:value)] when :class_variable_read_node [ConstantField.new(:name)] when :class_variable_target_node [ConstantField.new(:name)] when :class_variable_write_node [ConstantField.new(:name), LocationField.new(:name_loc), NodeField.new(:value), LocationField.new(:operator_loc)] when :constant_and_write_node [ConstantField.new(:name), LocationField.new(:name_loc), LocationField.new(:operator_loc), NodeField.new(:value)] when :constant_operator_write_node [ConstantField.new(:name), LocationField.new(:name_loc), LocationField.new(:binary_operator_loc), NodeField.new(:value), ConstantField.new(:binary_operator)] when :constant_or_write_node [ConstantField.new(:name), LocationField.new(:name_loc), LocationField.new(:operator_loc), NodeField.new(:value)] when :constant_path_and_write_node [NodeField.new(:target), LocationField.new(:operator_loc), NodeField.new(:value)] when :constant_path_node [OptionalNodeField.new(:parent), OptionalConstantField.new(:name), LocationField.new(:delimiter_loc), LocationField.new(:name_loc)] when :constant_path_operator_write_node [NodeField.new(:target), LocationField.new(:binary_operator_loc), NodeField.new(:value), ConstantField.new(:binary_operator)] when :constant_path_or_write_node [NodeField.new(:target), LocationField.new(:operator_loc), NodeField.new(:value)] when :constant_path_target_node [OptionalNodeField.new(:parent), OptionalConstantField.new(:name), LocationField.new(:delimiter_loc), LocationField.new(:name_loc)] when :constant_path_write_node [NodeField.new(:target), LocationField.new(:operator_loc), NodeField.new(:value)] when :constant_read_node [ConstantField.new(:name)] when :constant_target_node [ConstantField.new(:name)] when :constant_write_node [ConstantField.new(:name), LocationField.new(:name_loc), NodeField.new(:value), LocationField.new(:operator_loc)] when :def_node [ConstantField.new(:name), LocationField.new(:name_loc), OptionalNodeField.new(:receiver), OptionalNodeField.new(:parameters), OptionalNodeField.new(:body), ConstantListField.new(:locals), LocationField.new(:def_keyword_loc), OptionalLocationField.new(:operator_loc), OptionalLocationField.new(:lparen_loc), OptionalLocationField.new(:rparen_loc), OptionalLocationField.new(:equal_loc), OptionalLocationField.new(:end_keyword_loc)] when :defined_node [OptionalLocationField.new(:lparen_loc), NodeField.new(:value), OptionalLocationField.new(:rparen_loc), LocationField.new(:keyword_loc)] when :else_node [LocationField.new(:else_keyword_loc), OptionalNodeField.new(:statements), OptionalLocationField.new(:end_keyword_loc)] when :embedded_statements_node [LocationField.new(:opening_loc), OptionalNodeField.new(:statements), LocationField.new(:closing_loc)] when :embedded_variable_node [LocationField.new(:operator_loc), NodeField.new(:variable)] when :ensure_node [LocationField.new(:ensure_keyword_loc), OptionalNodeField.new(:statements), LocationField.new(:end_keyword_loc)] when :false_node [] when :find_pattern_node [OptionalNodeField.new(:constant), NodeField.new(:left), NodeListField.new(:requireds), NodeField.new(:right), OptionalLocationField.new(:opening_loc), OptionalLocationField.new(:closing_loc)] when :flip_flop_node [FlagsField.new(:flags, [:exclude_end?]), OptionalNodeField.new(:left), OptionalNodeField.new(:right), LocationField.new(:operator_loc)] when :float_node [FloatField.new(:value)] when :for_node [NodeField.new(:index), NodeField.new(:collection), OptionalNodeField.new(:statements), LocationField.new(:for_keyword_loc), LocationField.new(:in_keyword_loc), OptionalLocationField.new(:do_keyword_loc), LocationField.new(:end_keyword_loc)] when :forwarding_arguments_node [] when :forwarding_parameter_node [] when :forwarding_super_node [OptionalNodeField.new(:block)] when :global_variable_and_write_node [ConstantField.new(:name), LocationField.new(:name_loc), LocationField.new(:operator_loc), NodeField.new(:value)] when :global_variable_operator_write_node [ConstantField.new(:name), LocationField.new(:name_loc), LocationField.new(:binary_operator_loc), NodeField.new(:value), ConstantField.new(:binary_operator)] when :global_variable_or_write_node [ConstantField.new(:name), LocationField.new(:name_loc), LocationField.new(:operator_loc), NodeField.new(:value)] when :global_variable_read_node [ConstantField.new(:name)] when :global_variable_target_node [ConstantField.new(:name)] when :global_variable_write_node [ConstantField.new(:name), LocationField.new(:name_loc), NodeField.new(:value), LocationField.new(:operator_loc)] when :hash_node [LocationField.new(:opening_loc), NodeListField.new(:elements), LocationField.new(:closing_loc)] when :hash_pattern_node [OptionalNodeField.new(:constant), NodeListField.new(:elements), OptionalNodeField.new(:rest), OptionalLocationField.new(:opening_loc), OptionalLocationField.new(:closing_loc)] when :if_node [OptionalLocationField.new(:if_keyword_loc), NodeField.new(:predicate), OptionalLocationField.new(:then_keyword_loc), OptionalNodeField.new(:statements), OptionalNodeField.new(:consequent), OptionalLocationField.new(:end_keyword_loc)] when :imaginary_node [NodeField.new(:numeric)] when :implicit_node [NodeField.new(:value)] when :implicit_rest_node [] when :in_node [NodeField.new(:pattern), OptionalNodeField.new(:statements), LocationField.new(:in_loc), OptionalLocationField.new(:then_loc)] when :index_and_write_node [FlagsField.new(:flags, [:safe_navigation?, :variable_call?, :attribute_write?, :ignore_visibility?]), OptionalNodeField.new(:receiver), OptionalLocationField.new(:call_operator_loc), LocationField.new(:opening_loc), OptionalNodeField.new(:arguments), LocationField.new(:closing_loc), OptionalNodeField.new(:block), LocationField.new(:operator_loc), NodeField.new(:value)] when :index_operator_write_node [FlagsField.new(:flags, [:safe_navigation?, :variable_call?, :attribute_write?, :ignore_visibility?]), OptionalNodeField.new(:receiver), OptionalLocationField.new(:call_operator_loc), LocationField.new(:opening_loc), OptionalNodeField.new(:arguments), LocationField.new(:closing_loc), OptionalNodeField.new(:block), ConstantField.new(:binary_operator), LocationField.new(:binary_operator_loc), NodeField.new(:value)] when :index_or_write_node [FlagsField.new(:flags, [:safe_navigation?, :variable_call?, :attribute_write?, :ignore_visibility?]), OptionalNodeField.new(:receiver), OptionalLocationField.new(:call_operator_loc), LocationField.new(:opening_loc), OptionalNodeField.new(:arguments), LocationField.new(:closing_loc), OptionalNodeField.new(:block), LocationField.new(:operator_loc), NodeField.new(:value)] when :index_target_node [FlagsField.new(:flags, [:safe_navigation?, :variable_call?, :attribute_write?, :ignore_visibility?]), NodeField.new(:receiver), LocationField.new(:opening_loc), OptionalNodeField.new(:arguments), LocationField.new(:closing_loc), OptionalNodeField.new(:block)] when :instance_variable_and_write_node [ConstantField.new(:name), LocationField.new(:name_loc), LocationField.new(:operator_loc), NodeField.new(:value)] when :instance_variable_operator_write_node [ConstantField.new(:name), LocationField.new(:name_loc), LocationField.new(:binary_operator_loc), NodeField.new(:value), ConstantField.new(:binary_operator)] when :instance_variable_or_write_node [ConstantField.new(:name), LocationField.new(:name_loc), LocationField.new(:operator_loc), NodeField.new(:value)] when :instance_variable_read_node [ConstantField.new(:name)] when :instance_variable_target_node [ConstantField.new(:name)] when :instance_variable_write_node [ConstantField.new(:name), LocationField.new(:name_loc), NodeField.new(:value), LocationField.new(:operator_loc)] when :integer_node [FlagsField.new(:flags, [:binary?, :decimal?, :octal?, :hexadecimal?]), IntegerField.new(:value)] when :interpolated_match_last_line_node [FlagsField.new(:flags, [:ignore_case?, :extended?, :multi_line?, :once?, :euc_jp?, :ascii_8bit?, :windows_31j?, :utf_8?, :forced_utf8_encoding?, :forced_binary_encoding?, :forced_us_ascii_encoding?]), LocationField.new(:opening_loc), NodeListField.new(:parts), LocationField.new(:closing_loc)] when :interpolated_regular_expression_node [FlagsField.new(:flags, [:ignore_case?, :extended?, :multi_line?, :once?, :euc_jp?, :ascii_8bit?, :windows_31j?, :utf_8?, :forced_utf8_encoding?, :forced_binary_encoding?, :forced_us_ascii_encoding?]), LocationField.new(:opening_loc), NodeListField.new(:parts), LocationField.new(:closing_loc)] when :interpolated_string_node [FlagsField.new(:flags, [:frozen?, :mutable?]), OptionalLocationField.new(:opening_loc), NodeListField.new(:parts), OptionalLocationField.new(:closing_loc)] when :interpolated_symbol_node [OptionalLocationField.new(:opening_loc), NodeListField.new(:parts), OptionalLocationField.new(:closing_loc)] when :interpolated_x_string_node [LocationField.new(:opening_loc), NodeListField.new(:parts), LocationField.new(:closing_loc)] when :it_parameters_node [] when :keyword_hash_node [FlagsField.new(:flags, [:symbol_keys?]), NodeListField.new(:elements)] when :keyword_rest_parameter_node [FlagsField.new(:flags, [:repeated_parameter?]), OptionalConstantField.new(:name), OptionalLocationField.new(:name_loc), LocationField.new(:operator_loc)] when :lambda_node [ConstantListField.new(:locals), LocationField.new(:operator_loc), LocationField.new(:opening_loc), LocationField.new(:closing_loc), OptionalNodeField.new(:parameters), OptionalNodeField.new(:body)] when :local_variable_and_write_node [LocationField.new(:name_loc), LocationField.new(:operator_loc), NodeField.new(:value), ConstantField.new(:name), IntegerField.new(:depth)] when :local_variable_operator_write_node [LocationField.new(:name_loc), LocationField.new(:binary_operator_loc), NodeField.new(:value), ConstantField.new(:name), ConstantField.new(:binary_operator), IntegerField.new(:depth)] when :local_variable_or_write_node [LocationField.new(:name_loc), LocationField.new(:operator_loc), NodeField.new(:value), ConstantField.new(:name), IntegerField.new(:depth)] when :local_variable_read_node [ConstantField.new(:name), IntegerField.new(:depth)] when :local_variable_target_node [ConstantField.new(:name), IntegerField.new(:depth)] when :local_variable_write_node [ConstantField.new(:name), IntegerField.new(:depth), LocationField.new(:name_loc), NodeField.new(:value), LocationField.new(:operator_loc)] when :match_last_line_node [FlagsField.new(:flags, [:ignore_case?, :extended?, :multi_line?, :once?, :euc_jp?, :ascii_8bit?, :windows_31j?, :utf_8?, :forced_utf8_encoding?, :forced_binary_encoding?, :forced_us_ascii_encoding?]), LocationField.new(:opening_loc), LocationField.new(:content_loc), LocationField.new(:closing_loc), StringField.new(:unescaped)] when :match_predicate_node [NodeField.new(:value), NodeField.new(:pattern), LocationField.new(:operator_loc)] when :match_required_node [NodeField.new(:value), NodeField.new(:pattern), LocationField.new(:operator_loc)] when :match_write_node [NodeField.new(:call), NodeListField.new(:targets)] when :missing_node [] when :module_node [ConstantListField.new(:locals), LocationField.new(:module_keyword_loc), NodeField.new(:constant_path), OptionalNodeField.new(:body), LocationField.new(:end_keyword_loc), ConstantField.new(:name)] when :multi_target_node [NodeListField.new(:lefts), OptionalNodeField.new(:rest), NodeListField.new(:rights), OptionalLocationField.new(:lparen_loc), OptionalLocationField.new(:rparen_loc)] when :multi_write_node [NodeListField.new(:lefts), OptionalNodeField.new(:rest), NodeListField.new(:rights), OptionalLocationField.new(:lparen_loc), OptionalLocationField.new(:rparen_loc), LocationField.new(:operator_loc), NodeField.new(:value)] when :next_node [OptionalNodeField.new(:arguments), LocationField.new(:keyword_loc)] when :nil_node [] when :no_keywords_parameter_node [LocationField.new(:operator_loc), LocationField.new(:keyword_loc)] when :numbered_parameters_node [IntegerField.new(:maximum)] when :numbered_reference_read_node [IntegerField.new(:number)] when :optional_keyword_parameter_node [FlagsField.new(:flags, [:repeated_parameter?]), ConstantField.new(:name), LocationField.new(:name_loc), NodeField.new(:value)] when :optional_parameter_node [FlagsField.new(:flags, [:repeated_parameter?]), ConstantField.new(:name), LocationField.new(:name_loc), LocationField.new(:operator_loc), NodeField.new(:value)] when :or_node [NodeField.new(:left), NodeField.new(:right), LocationField.new(:operator_loc)] when :parameters_node [NodeListField.new(:requireds), NodeListField.new(:optionals), OptionalNodeField.new(:rest), NodeListField.new(:posts), NodeListField.new(:keywords), OptionalNodeField.new(:keyword_rest), OptionalNodeField.new(:block)] when :parentheses_node [OptionalNodeField.new(:body), LocationField.new(:opening_loc), LocationField.new(:closing_loc)] when :pinned_expression_node [NodeField.new(:expression), LocationField.new(:operator_loc), LocationField.new(:lparen_loc), LocationField.new(:rparen_loc)] when :pinned_variable_node [NodeField.new(:variable), LocationField.new(:operator_loc)] when :post_execution_node [OptionalNodeField.new(:statements), LocationField.new(:keyword_loc), LocationField.new(:opening_loc), LocationField.new(:closing_loc)] when :pre_execution_node [OptionalNodeField.new(:statements), LocationField.new(:keyword_loc), LocationField.new(:opening_loc), LocationField.new(:closing_loc)] when :program_node [ConstantListField.new(:locals), NodeField.new(:statements)] when :range_node [FlagsField.new(:flags, [:exclude_end?]), OptionalNodeField.new(:left), OptionalNodeField.new(:right), LocationField.new(:operator_loc)] when :rational_node [NodeField.new(:numeric)] when :redo_node [] when :regular_expression_node [FlagsField.new(:flags, [:ignore_case?, :extended?, :multi_line?, :once?, :euc_jp?, :ascii_8bit?, :windows_31j?, :utf_8?, :forced_utf8_encoding?, :forced_binary_encoding?, :forced_us_ascii_encoding?]), LocationField.new(:opening_loc), LocationField.new(:content_loc), LocationField.new(:closing_loc), StringField.new(:unescaped)] when :required_keyword_parameter_node [FlagsField.new(:flags, [:repeated_parameter?]), ConstantField.new(:name), LocationField.new(:name_loc)] when :required_parameter_node [FlagsField.new(:flags, [:repeated_parameter?]), ConstantField.new(:name)] when :rescue_modifier_node [NodeField.new(:expression), LocationField.new(:keyword_loc), NodeField.new(:rescue_expression)] when :rescue_node [LocationField.new(:keyword_loc), NodeListField.new(:exceptions), OptionalLocationField.new(:operator_loc), OptionalNodeField.new(:reference), OptionalNodeField.new(:statements), OptionalNodeField.new(:consequent)] when :rest_parameter_node [FlagsField.new(:flags, [:repeated_parameter?]), OptionalConstantField.new(:name), OptionalLocationField.new(:name_loc), LocationField.new(:operator_loc)] when :retry_node [] when :return_node [FlagsField.new(:flags, [:redundant?]), LocationField.new(:keyword_loc), OptionalNodeField.new(:arguments)] when :self_node [] when :shareable_constant_node [FlagsField.new(:flags, [:literal?, :experimental_everything?, :experimental_copy?]), NodeField.new(:write)] when :singleton_class_node [ConstantListField.new(:locals), LocationField.new(:class_keyword_loc), LocationField.new(:operator_loc), NodeField.new(:expression), OptionalNodeField.new(:body), LocationField.new(:end_keyword_loc)] when :source_encoding_node [] when :source_file_node [FlagsField.new(:flags, [:forced_utf8_encoding?, :forced_binary_encoding?, :frozen?, :mutable?]), StringField.new(:filepath)] when :source_line_node [] when :splat_node [LocationField.new(:operator_loc), OptionalNodeField.new(:expression)] when :statements_node [NodeListField.new(:body)] when :string_node [FlagsField.new(:flags, [:forced_utf8_encoding?, :forced_binary_encoding?, :frozen?, :mutable?]), OptionalLocationField.new(:opening_loc), LocationField.new(:content_loc), OptionalLocationField.new(:closing_loc), StringField.new(:unescaped)] when :super_node [LocationField.new(:keyword_loc), OptionalLocationField.new(:lparen_loc), OptionalNodeField.new(:arguments), OptionalLocationField.new(:rparen_loc), OptionalNodeField.new(:block)] when :symbol_node [FlagsField.new(:flags, [:forced_utf8_encoding?, :forced_binary_encoding?, :forced_us_ascii_encoding?]), OptionalLocationField.new(:opening_loc), OptionalLocationField.new(:value_loc), OptionalLocationField.new(:closing_loc), StringField.new(:unescaped)] when :true_node [] when :undef_node [NodeListField.new(:names), LocationField.new(:keyword_loc)] when :unless_node [LocationField.new(:keyword_loc), NodeField.new(:predicate), OptionalLocationField.new(:then_keyword_loc), OptionalNodeField.new(:statements), OptionalNodeField.new(:consequent), OptionalLocationField.new(:end_keyword_loc)] when :until_node [FlagsField.new(:flags, [:begin_modifier?]), LocationField.new(:keyword_loc), OptionalLocationField.new(:closing_loc), NodeField.new(:predicate), OptionalNodeField.new(:statements)] when :when_node [LocationField.new(:keyword_loc), NodeListField.new(:conditions), OptionalLocationField.new(:then_keyword_loc), OptionalNodeField.new(:statements)] when :while_node [FlagsField.new(:flags, [:begin_modifier?]), LocationField.new(:keyword_loc), OptionalLocationField.new(:closing_loc), NodeField.new(:predicate), OptionalNodeField.new(:statements)] when :x_string_node [FlagsField.new(:flags, [:forced_utf8_encoding?, :forced_binary_encoding?]), LocationField.new(:opening_loc), LocationField.new(:content_loc), LocationField.new(:closing_loc), StringField.new(:unescaped)] when :yield_node [LocationField.new(:keyword_loc), OptionalLocationField.new(:lparen_loc), OptionalNodeField.new(:arguments), OptionalLocationField.new(:rparen_loc)] else raise "Unknown node type: #{node.type.inspect}" end end