Class: Ibex::Runtime::Parser

Inherits:
Object
  • Object
show all
Includes:
Observation, ParserSyncRecovery
Defined in:
lib/ibex/runtime/parser.rb,
sig/ibex/runtime/parser.rbs

Overview

Drives a table-defined LR parser without native extensions.

Subclasses provide .parser_tables, returning :tokens, :token_names, :actions, :gotos, and :productions, with optional :default_actions, :error_messages, and :recovery_sync_tokens. Actions are represented by [:shift, state], [:reduce, production], [:accept], or [:error]. Format-v2 and newer generated production entries mark their five-argument semantic methods with location_action: true. Format-v3 and newer composed actions additionally use composition_action: true for the six-argument contract carrying the lookahead location. Format-v4 location-free generated methods use values_action: true for a one-argument values contract. Format-v5 additionally marks proven-safe zero-to-four-value methods with positional_action: true. V1 and unmarked application actions retain the historical two-argument contract. Markers are honored only for the generated _ibex_action_N Symbol shape, never for callables.

Constant Summary collapse

ParseError =

Signature:

  • singleton(Ibex::Runtime::ParseError)

Returns:

Ibex::Runtime::ParseError
EOF_TOKEN =

Signature:

  • Integer

Returns:

  • (Integer) 
0
ERROR_TOKEN =

Signature:

  • Integer

Returns:

  • (Integer) 
1
GENERATED_ACTION_NAME =

Signature:

  • Regexp

Returns:

  • (Regexp) 
/\A_ibex_action_\d+\z/
NO_LOOKAHEAD =

Signature:

  • Object

Returns:

  • (Object) 
Object.new.freeze
RECOVERY_SHIFTS =

Signature:

  • Integer

Returns:

  • (Integer) 
3
FAST_PATH_HOOK_NAMES =

Returns:

  • (Array[Symbol]) 
%i[
  on_shift on_shift_location on_reduce on_reduce_location token_to_str
].freeze
FAST_PATH_HOOK_REFERENCES =

Signature:

  • Array[Symbol]

Returns:

  • (Hash[Symbol, Symbol]) 
{
  on_shift: :__ibex_fast_path_on_shift,
  on_shift_location: :__ibex_fast_path_on_shift_location,
  on_reduce: :__ibex_fast_path_on_reduce,
  on_reduce_location: :__ibex_fast_path_on_reduce_location,
  token_to_str: :__ibex_fast_path_token_to_str
}.freeze
ERROR_ACTION =

Signature:

  • Hash[Symbol, Symbol]

Returns:

  • ([ :error ]) 
[:error].freeze
SYNC_RECOVER_ACTION =

Signature:

  • [:sync_recover]

Returns:

  • ([ :sync_recover ]) 
[:sync_recover].freeze
CONTINUE_OUTCOME =

Signature:

  • [:continue]

Returns:

  • ([ :continue ]) 
[:continue].freeze
REPAIR_PENDING_OUTCOME =

Signature:

  • [:repair_pending]

Returns:

  • ([ :repair_pending ]) 
[:repair_pending].freeze
TERMINAL_OUTCOMES =

Signature:

  • Array[Symbol]

Returns:

  • (Array[Symbol]) 
%i[accepted done].freeze
COMPACT_ACCEPTED =

Signature:

  • Object

Returns:

  • (Object) 
Object.new.freeze
EMPTY_ROW =

Signature:

  • Hash[Integer, untyped]

Returns:

  • (Hash[Integer, untyped]) 
empty_row.freeze
EMPTY_LOCATION_NAMES =

Signature:

  • Hash[Symbol, Integer]

Returns:

  • (Hash[Symbol, Integer]) 
empty_location_names.freeze
EMPTY_LOCATIONS =

Signature:

  • Array[untyped]

Returns:

  • (Array[untyped]) 
empty_locations.freeze
EMPTY_GREEN_TRIVIA =

Signature:

  • Array[CST::GreenTrivia]

Returns:

empty_green_trivia.freeze

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from ParserSyncRecovery

#begin_sync_recovery, #clear_sync_recovery, #continue_sync_recovery, #finish_sync_recovery, #reject_sync_recovery_eof, #sync_action, #sync_recovery_active?, #sync_recovery_configured?, #sync_token?, #synchronize_for_current_token

Methods included from Observation

#emit_runtime_event, #ensure_observation_thread!, #observe, #runtime_observer_snapshot, #unobserve

Constructor Details

#initialize(resource_limits: ResourceLimits.new) ⇒ Parser

Returns a new instance of Parser.

RBS:

  • (?resource_limits: ResourceLimits) -> void

Parameters:



335
336
337
338
 
# File 'lib/ibex/runtime/parser.rb', line 335

def initialize(resource_limits: ResourceLimits.new)
  validate_resource_limits!(resource_limits)
  initialize_runtime_state(resource_limits, preserve_existing: false)
end

Instance Attribute Details

#incremental_reused_descendants ⇒ Integer (readonly)

Signature:

  • Integer

Returns:

  • (Integer) 


323
324
325
 
# File 'lib/ibex/runtime/parser.rb', line 323

def incremental_reused_descendants
  @incremental_reused_descendants
end

#syntax_parse_memo ⇒ CST::ParseMemo? (readonly)

RBS:

  • @yydebug: bool

  • @yydebug_output: IO

  • @source: untyped

  • @state_stack: Array[Integer]

  • @value_stack: Array[untyped]

  • @vstack: Array[untyped]

  • @racc_vstack: Array[untyped]

  • @location_stack: Array[untyped]?

  • @lookahead: untyped

  • @lookahead_value: untyped

  • @lookahead_location: untyped

  • @recovery_shifts: Integer

  • @semantic_error: bool

  • @accept_requested: bool

  • @unknown_token_id: Integer?

  • @unknown_token_name: String?

  • @push_status: :idle | :active | :finished

  • @driver_status: :idle | :pull | :push

  • @runtime_driver_thread: Thread?

  • @runtime_observers: Hash[Observation::Subscription, Proc]?

  • @runtime_event_sequence: Integer

  • @runtime_lookahead_token_display: untyped

  • @runtime_observation_mutex: Mutex

  • @repair_policy: RepairPolicy?

  • @repair_input_buffer: Array[RepairInput]?

  • @repair_selected: bool

  • @semantic_locations: Array[untyped]?

  • @semantic_location_names: Hash[Symbol, Integer]?

  • @semantic_result_location: untyped

  • @trace_value_printer: (^(untyped) -> untyped)?

  • @sync_recovery_context: Hash[Symbol, untyped]?

  • @sync_recovery_token_data: Hash[String, untyped]?

  • @sync_recovery_observers: Array[Proc]?

  • @green_builder: CST::GreenBuilder?

  • @green_kinds: CST::Kind?

  • @green_cache: CST::NodeCache?

  • @syntax_root: CST::SyntaxNode?

  • @syntax_diagnostics: Array[untyped]

  • @green_pending_skipped: Array[CST::GreenTrivia]

  • @resource_limits: ResourceLimits

  • @recovery_attempts: Integer

  • @runtime_parser_tables: Hash[Symbol, untyped]?

  • @runtime_fast_path: bool

  • @runtime_fast_path_tracker_installed: bool

  • @runtime_fast_path_hooks_mutated: bool

  • @runtime_fast_path_singleton_ancestors: Array[Module]?

  • @syntax_only: bool

  • @green_cache_override: CST::NodeCache?

  • @green_token_states: Array[Symbol]

  • @green_memo_stack: Array[CST::ParseMemo::Entry]

  • @green_parse_memo_valid: bool

  • @green_initial_state: Integer

  • @syntax_parse_memo: CST::ParseMemo?

  • @green_reused_right_edge: bool

  • @incremental_reused_descendants: Integer

Returns:



322
323
324
 
# File 'lib/ibex/runtime/parser.rb', line 322

def syntax_parse_memo
  @syntax_parse_memo
end

Class Method Details

.incremental_session(source_text, resource_limits: nil, blender: true) ⇒ CST::IncrementalParseSession

Start a syntax-only incremental session backed by a generated lexer.

RBS:

  • (CST::SourceText source_text, ?resource_limits: ResourceLimits?, ?blender: bool) -> CST::IncrementalParseSession

Parameters:

Returns:



328
329
330
331
332
 
# File 'lib/ibex/runtime/parser.rb', line 328

def self.incremental_session(source_text, resource_limits: nil, blender: true)
  CST::IncrementalParseSession.new(
    self, source_text, resource_limits: resource_limits, blender: blender
  )
end

Instance Method Details

#accept_reduction(result) ⇒ [ :accepted, untyped ]

RBS:

  • (untyped result) -> [:accepted, untyped]

Parameters:

  • result (Object)

Returns:

  • ([ :accepted, untyped ]) 


1669
1670
1671
1672
1673
 
# File 'lib/ibex/runtime/parser.rb', line 1669

def accept_reduction(result)
  result = finalize_cst(result)
  emit_accept_event(EventSanitizer.value(result), "semantic") if @runtime_observers
  [:accepted, result]
end

#action_for_current_state ⇒ Object

RBS:

  • () -> untyped

Returns:

  • (Object) 


1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
 
# File 'lib/ibex/runtime/parser.rb', line 1420

def action_for_current_state
  loop do
    if @lookahead.equal?(NO_LOOKAHEAD)
      state = @state_stack.last
      eager = parser_tables.fetch(:eager_reductions, EMPTY_ROW)[state]
      return eager if eager

      read_lookahead
      next if @lookahead.equal?(NO_LOOKAHEAD)
    end
    return SYNC_RECOVER_ACTION if sync_recovery_active?

    state = @state_stack.last
    return ERROR_ACTION unless parser_tables.fetch(:token_names).key?(@lookahead)

    explicit = table_lookup(parser_tables.fetch(:actions), state, @lookahead)
    return explicit if explicit

    return default_action(state) || ERROR_ACTION
  end
end

#actionless_reduction_value(_production_id, _production, values, _locations, _location) ⇒ Object

RBS:

  • (Integer production_id, Hash[Symbol, untyped] production, Array[untyped] values, Array[untyped] locations, LocationSpan? location) -> untyped

Parameters:

  • production_id (Integer)
  • production (Hash[Symbol, untyped])
  • values (Array[untyped])
  • locations (Array[untyped])
  • location (LocationSpan, nil)

Returns:

  • (Object) 


1742
1743
1744
 
# File 'lib/ibex/runtime/parser.rb', line 1742

def actionless_reduction_value(_production_id, _production, values, _locations, _location)
  values.first
end

#append_repair_edits(output, input, edits) ⇒ Boolean

RBS:

  • (Array[RepairInput] output, RepairInput input, Array[RepairEdit] edits) -> bool

Parameters:

Returns:

  • (Boolean) 


2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
 
# File 'lib/ibex/runtime/parser.rb', line 2538

def append_repair_edits(output, input, edits)
  preserve_deleted_repair_input(input) if edits.any? { |edit| edit.kind == :delete }
  edits.each do |edit|
    if edit.kind == :insert
      output << synthetic_repair_input(edit, value: nil, location: input.location)
    elsif edit.kind == :replace
      output << synthetic_repair_input(edit, value: input.value, location: input.location)
    end
  end
  edits.any? { |edit| %i[delete replace].include?(edit.kind) }
end

#apply_repair(plan) ⇒ void

This method returns an undefined value.

RBS:

  • (RepairPlan plan) -> void

Parameters:



2505
2506
2507
2508
2509
2510
2511
 
# File 'lib/ibex/runtime/parser.rb', line 2505

def apply_repair(plan)
  source = [current_repair_input] + (@repair_input_buffer || [])
  @repair_input_buffer = replay_repair_edits(source, plan.edits)
  clear_repair_lookahead
  @recovery_shifts = 0
  trace("repair cost #{plan.cost}: #{repair_trace(plan)}") if @yydebug
end

#assign_repair_input(input) ⇒ void

This method returns an undefined value.

RBS:

  • (RepairInput input) -> void

Parameters:



2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
 
# File 'lib/ibex/runtime/parser.rb', line 2714

def assign_repair_input(input)
  @lookahead = input.token_id
  @lookahead_value = input.value
  @lookahead_location = input.location
  @runtime_lookahead_token_display = input.token_name
  if input.token_id.negative?
    @unknown_token_id = input.token_id
    @unknown_token_name = input.token_name
  end
  trace("read #{input.token_name}") if @yydebug
end

#begin_recovery(report) ⇒ Object

RBS:

  • (bool report) -> untyped

Parameters:

  • report (Boolean)

Returns:

  • (Object) 


2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
 
# File 'lib/ibex/runtime/parser.rb', line 2229

def begin_recovery(report)
  consume_recovery_attempt!
  repair = report ? selected_repair : nil
  return REPAIR_PENDING_OUTCOME if repair.equal?(RepairSearch::NEED_INPUT)

  context = recovery_context(report)
  capture_cst_error(context[:token_id], context[:value], context[:location], context[:reason].to_sym)
  token_data, recovery_observers = publish_error_context(context)
  notify_error_handler(context, repair) if report
  return commit_repair(repair) if repair.is_a?(RepairPlan)

  fallback_recovery(context, token_data, recovery_observers)
end

#build_reduce_event_data(observers, production_id, production, length, pre_state, post_state, next_state, result, location) ⇒ Hash[String, untyped]?

RBS:

  • (Array[Proc]? observers, Integer production_id, Hash[Symbol, untyped] production, Integer length, Integer? pre_state, Integer? post_state, Integer next_state, untyped result, LocationSpan? location) -> Hash[String, untyped]?

Parameters:

  • observers (Array[Proc], nil)
  • production_id (Integer)
  • production (Hash[Symbol, untyped])
  • length (Integer)
  • pre_state (Integer, nil)
  • post_state (Integer, nil)
  • next_state (Integer)
  • result (Object)
  • location (LocationSpan, nil)

Returns:

  • (Hash[String, untyped], nil) 


1642
1643
1644
1645
1646
1647
1648
1649
1650
 
# File 'lib/ibex/runtime/parser.rb', line 1642

def build_reduce_event_data(
  observers, production_id, production, length, pre_state, post_state, next_state, result, location
)
  return unless observers

  runtime_reduce_data(
    production_id, production, length, pre_state, post_state, next_state, result, location
  )
end

#cache_generated_action_contracts!(tables) ⇒ void

This method returns an undefined value.

RBS:

  • (Hash[Symbol, untyped] tables) -> void

Parameters:

  • tables (Hash[Symbol, untyped]) 


1331
1332
1333
1334
1335
1336
1337
1338
1339
 
# File 'lib/ibex/runtime/parser.rb', line 1331

def cache_generated_action_contracts!(tables)
  shareable = defined?(Ractor) && Ractor.respond_to?(:shareable?) && Ractor.shareable?(tables)
  return unless shareable
  return unless generated_action_contract_cache_accessible?

  self.class.instance_variable_set(:@__ibex_validated_parser_tables, tables)
rescue FrozenError
  nil
end

#cached_runtime_fast_path_hooks_eligibility ⇒ Boolean?

RBS:

  • () -> bool?

Returns:

  • (Boolean, nil) 


2893
2894
2895
2896
2897
2898
2899
2900
2901
 
# File 'lib/ibex/runtime/parser.rb', line 2893

def cached_runtime_fast_path_hooks_eligibility
  return nil unless @runtime_fast_path_tracker_installed && !@runtime_fast_path_hooks_mutated

  singleton = Object.instance_method(:singleton_class).bind_call(self)
  return false if singleton.frozen?
  return nil unless @runtime_fast_path_singleton_ancestors == singleton.ancestors

  runtime_fast_path_class_hooks_eligible?
end

#capture_cst_error(token_id, value, location, reason) ⇒ void

This method returns an undefined value.

RBS:

  • (Integer token_id, untyped value, untyped location, Symbol reason) -> void

Parameters:

  • token_id (Integer)
  • value (Object)
  • location (Object)
  • reason (Symbol) 


1785
1786
1787
1788
1789
1790
1791
1792
 
# File 'lib/ibex/runtime/parser.rb', line 1785

def capture_cst_error(token_id, value, location, reason)
  return unless cst_enabled?
  return if token_id == EOF_TOKEN

  @syntax_diagnostics << {
    token_id: token_id, value: value, location: location, reason: reason
  }.freeze
end

#clear_repair_lookahead ⇒ void

This method returns an undefined value.

RBS:

  • () -> void



2574
2575
2576
2577
2578
2579
 
# File 'lib/ibex/runtime/parser.rb', line 2574

def clear_repair_lookahead
  @lookahead = NO_LOOKAHEAD
  @lookahead_value = nil
  @lookahead_location = nil
  @runtime_lookahead_token_display = nil
end

#commit_green_token_shift(builder, kinds, token_id, from_state, trailing, location_leading, repair, token_text, lexer_state) ⇒ void

This method returns an undefined value.

RBS:

  • (CST::GreenBuilder builder, CST::Kind kinds, Integer token_id, Integer from_state, Array[CST::GreenTrivia] trailing, Array[CST::GreenTrivia] location_leading, untyped repair, String token_text, Symbol lexer_state) -> void

Parameters:



1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
 
# File 'lib/ibex/runtime/parser.rb', line 1894

def commit_green_token_shift(
  builder, kinds, token_id, from_state, trailing, location_leading, repair, token_text, lexer_state
)
  builder.append_trailing_to_last_token(trailing) if !@green_reused_right_edge && !trailing.empty?
  if repair == :insert
    builder.missing(token_id)
    @green_token_states << lexer_state
    @green_memo_stack << CST::ParseMemo::Entry.new(from_state)
    return
  end

  if @green_pending_skipped.empty?
    leading = location_leading
    flags = 0
  else
    leading = @green_pending_skipped + location_leading
    @green_pending_skipped.clear
    flags = CST::Flags::CONTAINS_SKIPPED
  end
  flags |= CST::Flags::CONTAINS_ERROR if repair == :replace || token_id == ERROR_TOKEN
  kind = token_id.negative? ? kinds.fetch(:lexical_error_token) : token_id
  builder.token(kind, token_text, leading: leading, flags: flags)
  @green_token_states << lexer_state
  @green_memo_stack << CST::ParseMemo::Entry.new(from_state)
  @green_reused_right_edge = false
end

#commit_repair(repair) ⇒ [ :continue ]

RBS:

  • (RepairPlan repair) -> [:continue]

Parameters:

Returns:

  • ([ :continue ]) 


2281
2282
2283
2284
2285
 
# File 'lib/ibex/runtime/parser.rb', line 2281

def commit_repair(repair)
  on_repair(repair)
  apply_repair(repair)
  CONTINUE_OUTCOME
end

#compact_fast_driver_eligible?(tables) ⇒ Boolean

RBS:

  • (Hash[Symbol, untyped]? tables) -> bool

Parameters:

  • tables (Hash[Symbol, untyped], nil)

Returns:

  • (Boolean) 


1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
 
# File 'lib/ibex/runtime/parser.rb', line 1136

def compact_fast_driver_eligible?(tables)
  return false unless @runtime_fast_path && tables
  return false unless tables[:compact_fast_driver] == true
  return false unless tables.fetch(:eager_reductions, EMPTY_ROW).empty?
  return false unless defined?(Ibex::Tables::Compact)

  tables.fetch(:actions).instance_of?(Ibex::Tables::CompactActions) &&
    tables.fetch(:gotos).instance_of?(Ibex::Tables::Compact) &&
    tables.fetch(:productions).instance_of?(Ibex::Tables::CompactProductions) &&
    tables.fetch(:productions).direct_values?
end

#configured_error_message(configured) ⇒ [ String?, String? ]

RBS:

  • (untyped configured) -> [String?, String?]

Parameters:

  • configured (Object)

Returns:

  • ([ String?, String? ]) 


2767
2768
2769
2770
2771
2772
2773
 
# File 'lib/ibex/runtime/parser.rb', line 2767

def configured_error_message(configured)
  return [nil, configured] unless configured.is_a?(Hash)

  error_id = configured[:id] || configured["id"]
  message = configured[:message] || configured["message"]
  [error_id, message]
end

#consume_recovery_attempt! ⇒ void

This method returns an undefined value.

RBS:

  • () -> void



2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
 
# File 'lib/ibex/runtime/parser.rb', line 2466

def consume_recovery_attempt!
  @recovery_attempts += 1
  limit = @resource_limits.max_recovery_attempts
  return if @recovery_attempts <= limit

  raise ResourceLimitError.new(
    resource: :recovery_attempts, limit: limit, observed: @recovery_attempts,
    state: @state_stack.last, location: @lookahead_location
  )
end

#continue_recovery ⇒ Object

RBS:

  • () -> untyped

Returns:

  • (Object) 


2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
 
# File 'lib/ibex/runtime/parser.rb', line 2191

def continue_recovery
  return reject_recovery_eof if @lookahead == EOF_TOKEN

  token_display = token_to_str(@lookahead)
  event_observers = runtime_observer_snapshot if @runtime_observers
  event_data = runtime_discard_data(token_display) if event_observers
  trace("discard #{token_display} during recovery") if @yydebug
  on_discard(@lookahead, @lookahead_value, @lookahead_location, :recovery)
  discard_green_lookahead
  @lookahead = NO_LOOKAHEAD
  @lookahead_location = nil
  @runtime_lookahead_token_display = nil
  emit_runtime_event(:discard, event_data, observers: event_observers) if event_data
  CONTINUE_OUTCOME
end

#cst_enabled? ⇒ Boolean

RBS:

  • () -> bool

Returns:

  • (Boolean) 


1780
1781
1782
 
# File 'lib/ibex/runtime/parser.rb', line 1780

def cst_enabled?
  parser_tables[:cst].is_a?(Hash)
end

#cst_lexical_failure(error) ⇒ nil

RBS:

  • (ParseError error) -> nil

Parameters:

Returns:

  • (nil) 


1808
1809
1810
1811
1812
 
# File 'lib/ibex/runtime/parser.rb', line 1808

def cst_lexical_failure(error)
  @syntax_diagnostics << error
  finalize_lexical_green_cst(error)
  nil
end

#cst_location_value(location, key) ⇒ Object

RBS:

  • (untyped location, Symbol key) -> untyped

Parameters:

  • location (Object)
  • key (Symbol)

Returns:

  • (Object) 


1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
 
# File 'lib/ibex/runtime/parser.rb', line 1815

def cst_location_value(location, key)
  if location.is_a?(Hash)
    value = location[key]
    return value if value || location.key?(key)
    return if location.key?(:ibex_lexer_start_state)

    return location[key.name]
  end
  return location.public_send(key) if location.respond_to?(key)

  nil
end

#cst_repair_location(location, kind) ⇒ Hash[Symbol, untyped]

RBS:

  • (untyped location, Symbol kind) -> Hash[Symbol, untyped]

Parameters:

  • location (Object)
  • kind (Symbol)

Returns:

  • (Hash[Symbol, untyped]) 


2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
 
# File 'lib/ibex/runtime/parser.rb', line 2588

def cst_repair_location(location, kind)
  return location.merge(ibex_repair: kind).freeze if location.is_a?(Hash)

  {
    file: cst_location_value(location, :file),
    line: cst_location_value(location, :line),
    column: cst_location_value(location, :column),
    end_line: cst_location_value(location, :end_line),
    end_column: cst_location_value(location, :end_column),
    origin: location,
    ibex_repair: kind
  }.freeze
end

#current_repair_input ⇒ RepairInput

RBS:

  • () -> RepairInput

Returns:



2514
2515
2516
2517
2518
2519
2520
2521
 
# File 'lib/ibex/runtime/parser.rb', line 2514

def current_repair_input
  RepairInput.new(
    token_id: @lookahead,
    token_name: @runtime_lookahead_token_display || token_to_str(@lookahead),
    value: @lookahead_value,
    location: @lookahead_location
  )
end

#default_action(state) ⇒ Object

RBS:

  • (Integer state) -> untyped

Parameters:

  • state (Integer)

Returns:

  • (Object) 


2811
2812
2813
 
# File 'lib/ibex/runtime/parser.rb', line 2811

def default_action(state)
  parser_tables.fetch(:default_actions, EMPTY_ROW)[state]
end

#discard_green_lookahead ⇒ void

This method returns an undefined value.

RBS:

  • () -> void



2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
 
# File 'lib/ibex/runtime/parser.rb', line 2161

def discard_green_lookahead
  @green_parse_memo_valid = false
  builder = @green_builder
  kinds = @green_kinds
  return unless builder && kinds

  kind = @lookahead.is_a?(Integer) && @lookahead >= 0 ? @lookahead : kinds.fetch(:lexical_error_token)
  token = builder.make_token(
    kind, green_token_text(@lookahead_value, @lookahead_location),
    leading: green_location_trivia(@lookahead_location, :leading_trivia),
    flags: CST::Flags::CONTAINS_ERROR
  )
  return if builder.append_to_last_error(token)

  @green_pending_skipped << CST::GreenTrivia.new(
    kind: kinds.fetch(:skipped_tokens), text: token.to_source
  )
end

#do_parse ⇒ Object

Pull tokens from next_token and parse them.

RBS:

  • () -> untyped

Returns:

  • (Object) 


408
409
410
 
# File 'lib/ibex/runtime/parser.rb', line 408

def do_parse
  drive_parser(nil)
end

#drive_compact_fast_parser(tables) ⇒ Object, ...

Generated compact tables can keep the unobserved, location-free pull loop on their frozen displacement arrays. Any extension boundary or exceptional table shape returns control to the generic driver without replaying a committed action. rubocop:disable Metrics/AbcSize, Metrics/BlockNesting, Metrics/CyclomaticComplexity rubocop:disable Metrics/MethodLength, Metrics/PerceivedComplexity Direct comparisons avoid predicate-method dispatch inside the parser loop. rubocop:disable Style/BitwisePredicate, Style/NumericPredicate

RBS:

  • (Hash[Symbol, untyped] tables) -> (Object | [:accepted, untyped] | [:done, untyped])?

Parameters:

  • tables (Hash[Symbol, untyped])

Returns:

  • (Object, [ :accepted, untyped ], [ :done, untyped ], nil) 


896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
 
# File 'lib/ibex/runtime/parser.rb', line 896

def drive_compact_fast_parser(tables)
  actions = tables.fetch(:actions)
  gotos = tables.fetch(:gotos)
  productions = tables.fetch(:productions)
  default_codes = tables.fetch(:compact_default_actions)
  token_ids = tables.fetch(:tokens)
  dense_action_codes = actions.dense_codes
  action_column_count = actions.column_count
  dense_goto_values = gotos.dense_values
  goto_dense_width = gotos.dense_width
  return unless dense_action_codes && action_column_count &&
                dense_goto_values && goto_dense_width &&
                (tables[:compact_action_encoding] == :signed || default_codes.empty?)

  production_lhs_ids = productions.lhs_ids
  production_lengths = productions.lengths
  production_actions = productions.actions
  production_flags = productions.flags
  borrowed_values_flag = Ibex::Tables::CompactProductions::BORROWED_VALUES_ACTION
  positional_action_flag = Ibex::Tables::CompactProductions::POSITIONAL_ACTION
  states = @state_stack
  values = @value_stack
  stack_limit = @resource_limits.max_stack_depth
  accept_code = Ibex::Tables::CompactActions::ACCEPT_CODE
  error_code = Ibex::Tables::CompactActions::ERROR_CODE
  shift_base = Ibex::Tables::CompactActions::SHIFT_BASE
  reduce_base = Ibex::Tables::CompactActions::REDUCE_BASE

  while @runtime_fast_path
    if @lookahead.equal?(NO_LOOKAHEAD)
      source = @source

      token = begin
        source ? source.call : next_token
      rescue StopIteration
        false
      end
      @runtime_fast_path = false if
        @yydebug || @runtime_observers || @repair_policy || @location_stack ||
        @semantic_error || @accept_requested
      if token.nil? || token == false
        @lookahead = EOF_TOKEN
        @lookahead_value = nil
        @lookahead_location = nil
      else
        external_token, @lookahead_value, @lookahead_location = token
        if external_token.nil? || external_token == false
          @lookahead = EOF_TOKEN
        else
          token_id = token_ids[external_token]
          if token_id
            @lookahead = token_id
          else
            @unknown_token_name = external_token.inspect
            @unknown_token_id = -external_token.object_id.abs
            @lookahead = @unknown_token_id
          end
        end
      end
      @runtime_fast_path = false unless nil.equal?(@lookahead_location)
      unless @runtime_fast_path
        materialize_compatible_lookahead
        return
      end
    end
    return if @unknown_token_id == @lookahead

    state = states[-1]
    code = dense_action_codes[(state * action_column_count) + @lookahead] ||
           default_codes[state]
    return unless code

    if code == accept_code
      return COMPACT_ACCEPTED
    elsif code == error_code
      return
    elsif code > 0
      ensure_stack_capacity! if states.length >= stack_limit
      states << (code - shift_base)
      values << @lookahead_value
      @lookahead = NO_LOOKAHEAD
      @lookahead_location = nil
      @runtime_lookahead_token_display = nil
    else
      production_id = reduce_base - code
      lhs = production_lhs_ids[production_id]
      length = production_lengths[production_id]
      return unless length <= values.length && length < states.length

      semantic_action = production_actions[production_id]
      if !semantic_action && length == 1
        goto_row = states[-2]
        next_state = dense_goto_values[(goto_row * goto_dense_width) + lhs]
        raise ParseError, "(tables):1:1: missing goto for production #{production_id}" if next_state.nil?

        states[-1] = next_state
        next
      end
      hook_values = EMPTY_LOCATIONS
      if semantic_action
        flags = production_flags[production_id]
        positional_action = (flags & positional_action_flag) != 0
        if positional_action
          case length
          when 1
            value0 = values[-1]
          when 2
            value0 = values[-2]
            value1 = values[-1]
          when 3
            value0 = values[-3]
            value1 = values[-2]
            value2 = values[-1]
          when 4
            value0 = values[-4]
            value1 = values[-3]
            value2 = values[-2]
            value3 = values[-1]
          end
        else
          reduction_values = values.last(length)
          hook_values = if (flags & borrowed_values_flag) == 0
                          reduction_values.dup
                        else
                          reduction_values
                        end
        end
      else
        positional_action = false
        result = length.zero? ? nil : values[-length]
      end

      case length
      when 0
        nil
      when 1
        states.pop
        values.pop
      when 2
        states.pop
        states.pop
        values.pop
        values.pop
      when 3
        states.pop
        states.pop
        states.pop
        values.pop
        values.pop
        values.pop
      when 4
        states.pop
        states.pop
        states.pop
        states.pop
        values.pop
        values.pop
        values.pop
        values.pop
      else
        remaining = length
        while remaining > 0
          states.pop
          values.pop
          remaining -= 1
        end
      end

      if semantic_action
        previous_locations = @semantic_locations
        previous_names = @semantic_location_names
        previous_result_location = @semantic_result_location
        @semantic_locations = EMPTY_LOCATIONS
        @semantic_location_names = EMPTY_LOCATION_NAMES
        @semantic_result_location = nil
        begin
          result = if positional_action
                     case length
                     when 0 then __send__(semantic_action)
                     when 1 then __send__(semantic_action, value0)
                     when 2 then __send__(semantic_action, value0, value1)
                     when 3 then __send__(semantic_action, value0, value1, value2)
                     when 4 then __send__(semantic_action, value0, value1, value2, value3)
                     end
                   else
                     __send__(semantic_action, reduction_values)
                   end
        ensure
          @semantic_locations = previous_locations
          @semantic_location_names = previous_names
          @semantic_result_location = previous_result_location
        end
        @runtime_fast_path = false if
          @yydebug || @runtime_observers || @repair_policy || @location_stack ||
          @semantic_error || @accept_requested
      end

      goto_row = states[-1]
      next_state = dense_goto_values[(goto_row * goto_dense_width) + lhs]
      raise ParseError, "(tables):1:1: missing goto for production #{production_id}" if next_state.nil?

      ensure_stack_capacity! if states.length >= stack_limit
      states << next_state
      location_stack = @location_stack
      location_stack << nil if location_stack
      values << result
      if semantic_action
        trace_reduction(production_id, length, lhs, result, next_state) if @yydebug
        unless @runtime_fast_path
          if positional_action
            case length
            when 0 then hook_values = EMPTY_LOCATIONS
            when 1 then hook_values = [value0]
            when 2 then hook_values = [value0, value1]
            when 3 then hook_values = [value0, value1, value2]
            when 4 then hook_values = [value0, value1, value2, value3]
            end
          end
          lookup = Object.instance_method(:method)
          unless runtime_method_unchanged?(lookup, :on_reduce, :__ibex_fast_path_on_reduce)
            on_reduce(production_id, hook_values, result)
          end
          unless runtime_method_unchanged?(lookup, :on_reduce_location, :__ibex_fast_path_on_reduce_location)
            on_reduce_location(production_id, hook_values, result, Array.new(length), nil)
          end
        end
        return accept_reduction(result) if @accept_requested
        return recover(report: false) if @semantic_error

        next
      end
    end
  end
  nil
end

#drive_parser(source, initial_state: nil) ⇒ Object

RBS:

  • (untyped source, ?initial_state: Integer?) -> untyped

Parameters:

  • source (Object)
  • initial_state: (Integer, nil) (defaults to: nil)

Returns:

  • (Object) 


852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
 
# File 'lib/ibex/runtime/parser.rb', line 852

def drive_parser(source, initial_state: nil)
  ensure_runtime_initialized!
  @runtime_observation_mutex.synchronize do
    ensure_driver_available_without_lock!
    if @push_status == :active
      raise ParseError, "(input):1:1: cannot start another parser driver during an active push session"
    end

    @driver_status = :pull
    @runtime_driver_thread = Thread.current
  end

  begin
    prepare_parse(source, initial_state: initial_state)
    tables = @runtime_parser_tables
    if tables && compact_fast_driver_eligible?(tables)
      fast_outcome = drive_compact_fast_parser(tables)
      return @value_stack.last if fast_outcome.equal?(COMPACT_ACCEPTED)
      return fast_outcome.fetch(1) if fast_outcome.is_a?(Array) &&
                                      TERMINAL_OUTCOMES.include?(fast_outcome[0])
    end
    loop do
      outcome = perform(action_for_current_state)
      case outcome[0]
      when :accepted, :done then return outcome[1]
      end
    end
  ensure
    @source = nil
    @runtime_parser_tables = nil
    @runtime_fast_path = false
    release_driver
  end
end

#edit_distance(left, right) ⇒ Integer

RBS:

  • (String left, String right) -> Integer

Parameters:

  • left (String)
  • right (String)

Returns:

  • (Integer) 


2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
 
# File 'lib/ibex/runtime/parser.rb', line 2794

def edit_distance(left, right)
  previous = (0..right.length).to_a
  left.each_char.with_index(1) do |left_character, row|
    current = [row]
    right.each_char.with_index(1) do |right_character, column|
      current[column] = [
        current[column - 1] + 1,
        previous[column] + 1,
        previous[column - 1] + (left_character == right_character ? 0 : 1)
      ].min
    end
    previous = current
  end
  previous.last
end

#emit_accept_event(result_summary, reason) ⇒ void

This method returns an undefined value.

RBS:

  • (untyped result_summary, String reason) -> void

Parameters:

  • result_summary (Object)
  • reason (String) 


2409
2410
2411
2412
2413
2414
 
# File 'lib/ibex/runtime/parser.rb', line 2409

def emit_accept_event(result_summary, reason)
  emit_runtime_event(
    :accept,
    { "state" => @state_stack.last, "result" => result_summary, "reason" => reason }
  )
end

#emit_incremental_event(type, data) ⇒ void

This method returns an undefined value.

RBS:

  • (Symbol type, Hash[untyped, untyped] data) -> void

Parameters:

  • type (Symbol)
  • data (Hash[untyped, untyped]) 


2156
2157
2158
 
# File 'lib/ibex/runtime/parser.rb', line 2156

def emit_incremental_event(type, data)
  emit_runtime_event(type, data) if @runtime_observers
end

#emit_reject_event(reason, token_data, observers: runtime_observer_snapshot) ⇒ void

This method returns an undefined value.

RBS:

  • (String reason, Hash[String, untyped] token_data, ?observers: Array[Proc]?) -> void

Parameters:

  • reason (String)
  • token_data (Hash[String, untyped])
  • observers: (Array[Proc], nil) (defaults to: runtime_observer_snapshot) 


2417
2418
2419
2420
2421
2422
2423
 
# File 'lib/ibex/runtime/parser.rb', line 2417

def emit_reject_event(reason, token_data, observers: runtime_observer_snapshot)
  emit_runtime_event(
    :reject,
    token_data.merge("reason" => reason),
    observers: observers
  )
end

#enqueue_or_assign_repair_input(input) ⇒ void

This method returns an undefined value.

RBS:

  • (RepairInput input) -> void

Parameters:



2704
2705
2706
2707
2708
2709
2710
2711
 
# File 'lib/ibex/runtime/parser.rb', line 2704

def enqueue_or_assign_repair_input(input)
  buffer = @repair_input_buffer || raise(ParseError, "(repair):1:1: repair input buffer is unavailable")
  if @lookahead.equal?(NO_LOOKAHEAD) && buffer.empty?
    assign_repair_input(input)
  else
    buffer << input
  end
end

#ensure_driver_available_without_lock! ⇒ void

This method returns an undefined value.

RBS:

  • () -> void



1201
1202
1203
1204
1205
 
# File 'lib/ibex/runtime/parser.rb', line 1201

def ensure_driver_available_without_lock!
  return if @driver_status == :idle

  raise ParseError, "(input):1:1: parser driver is already running"
end

#ensure_runtime_initialized! ⇒ void

This method returns an undefined value.

Racc-generated parsers commonly define an application initializer without calling super. Complete only missing runtime state so those initializers retain values they deliberately configured.

RBS:

  • () -> void



689
690
691
692
693
694
695
696
697
698
 
# File 'lib/ibex/runtime/parser.rb', line 689

def ensure_runtime_initialized!
  return if defined?(@runtime_observation_mutex) && @runtime_observation_mutex

  limits = if defined?(@resource_limits) && @resource_limits.is_a?(ResourceLimits)
             @resource_limits
           else
             ResourceLimits.new
           end
  initialize_runtime_state(limits, preserve_existing: true)
end

#ensure_stack_capacity! ⇒ void

This method returns an undefined value.

RBS:

  • () -> void



2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
 
# File 'lib/ibex/runtime/parser.rb', line 2454

def ensure_stack_capacity!
  observed = @state_stack.length + 1
  limit = @resource_limits.max_stack_depth
  return if observed <= limit

  raise ResourceLimitError.new(
    resource: :stack_depth, limit: limit, observed: observed,
    state: @state_stack.last, location: @lookahead_location
  )
end

#error_action?(action) ⇒ Boolean

RBS:

  • (untyped action) -> bool

Parameters:

  • action (Object)

Returns:

  • (Boolean) 


2762
2763
2764
 
# File 'lib/ibex/runtime/parser.rb', line 2762

def error_action?(action)
  action.nil? || action.first == :error
end

#exact_lookahead_accepted?(token_id) ⇒ Boolean

RBS:

  • (Integer token_id) -> bool

Parameters:

  • token_id (Integer)

Returns:

  • (Boolean) 


780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
 
# File 'lib/ibex/runtime/parser.rb', line 780

def exact_lookahead_accepted?(token_id)
  stack = @state_stack.dup
  seen = {} #: Hash[Array[Integer], bool]
  remaining = exact_lookahead_step_budget(stack.length)
  loop do
    return false unless remaining.positive?
    return false if seen.key?(stack)

    remaining -= 1
    seen[stack.dup.freeze] = true
    state = stack.last
    action = table_lookup(parser_tables.fetch(:actions), state, token_id) || default_action(state) || ERROR_ACTION
    case action.first
    when :shift, :accept then return true
    when :error then return false
    end
    return false unless action.first == :reduce
    return false unless exact_reduction_applied?(stack, action.fetch(1))
  end
end

#exact_lookahead_step_budget(stack_depth) ⇒ Integer

RBS:

  • (Integer stack_depth) -> Integer

Parameters:

  • stack_depth (Integer)

Returns:

  • (Integer) 


802
803
804
805
806
807
808
809
810
 
# File 'lib/ibex/runtime/parser.rb', line 802

def exact_lookahead_step_budget(stack_depth)
  tables = parser_tables
  production_count = tables.fetch(:productions).length
  unless production_count.is_a?(Integer)
    raise ParseError, "(tables):1:1: parser table production count must be an Integer"
  end

  (stack_depth + parser_state_count(tables) + 1) * (production_count + 1)
end

#exact_reduction_applied?(stack, production_id) ⇒ Boolean

RBS:

  • (Array[Integer] stack, Integer production_id) -> bool

Parameters:

  • stack (Array[Integer])
  • production_id (Integer)

Returns:

  • (Boolean) 


825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
 
# File 'lib/ibex/runtime/parser.rb', line 825

def exact_reduction_applied?(stack, production_id)
  production = parser_tables.fetch(:productions).fetch(production_id)
  length = production.fetch(:length)
  return false if length >= stack.length

  if length.is_a?(Integer)
    if length.negative?
      stack.pop(length)
      return false
    end

    remaining = length
    while remaining.positive?
      stack.pop
      remaining -= 1
    end
  else
    stack.pop(length)
  end
  target = table_lookup(parser_tables.fetch(:gotos), stack.last, production.fetch(:lhs))
  return false unless target

  stack << target
  true
end

#expected_tokens ⇒ Array[String]

Return token names accepted in the current parser state.

RBS:

  • () -> Array[String]

Returns:

  • (Array[String]) 


621
622
623
624
625
626
627
628
629
630
631
 
# File 'lib/ibex/runtime/parser.rb', line 621

def expected_tokens
  ensure_runtime_initialized!
  return expected_tokens_exact if parser_tables[:exact_expected_tokens]
  return [] if @state_stack.empty?

  state = @state_stack.last
  parser_tables.fetch(:token_names).keys.filter_map do |token_id|
    action = table_lookup(parser_tables.fetch(:actions), state, token_id) || default_action(state) || ERROR_ACTION
    token_to_str(token_id) unless error_action?(action) || token_id == ERROR_TOKEN
  end
end

#expected_tokens_exact ⇒ Array[String]

Return token names that survive all required default reductions. Semantic actions are not evaluated during this lookahead correction.

RBS:

  • () -> Array[String]

Returns:

  • (Array[String]) 


636
637
638
639
640
641
642
643
644
645
 
# File 'lib/ibex/runtime/parser.rb', line 636

def expected_tokens_exact
  ensure_runtime_initialized!
  return [] if @state_stack.empty?

  parser_tables.fetch(:token_names).keys.filter_map do |token_id|
    next if token_id == ERROR_TOKEN

    token_to_str(token_id) if exact_lookahead_accepted?(token_id)
  end
end

#failed_cst ⇒ nil

RBS:

  • () -> nil

Returns:

  • (nil) 


1802
1803
1804
1805
 
# File 'lib/ibex/runtime/parser.rb', line 1802

def failed_cst
  finalize_failed_green_cst
  nil
end

#fallback_recovery(context, token_data, recovery_observers) ⇒ Object

rubocop:disable Metrics/CyclomaticComplexity, Metrics/PerceivedComplexity Green restoration mirrors the existing state/value/location transactional fallback.

RBS:

  • (Hash[Symbol, untyped] context, Hash[String, untyped]? token_data, Array[Proc]? recovery_observers) -> untyped

Parameters:

  • context (Hash[Symbol, untyped])
  • token_data (Hash[String, untyped], nil)
  • recovery_observers (Array[Proc], nil)

Returns:

  • (Object) 


2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
 
# File 'lib/ibex/runtime/parser.rb', line 2291

def fallback_recovery(context, token_data, recovery_observers)
  state_stack = @state_stack.dup if sync_recovery_configured?
  value_stack = @value_stack.dup if state_stack
  location_stack = @location_stack&.dup if state_stack
  green_stack = @green_builder&.snapshot if state_stack
  unless shift_error_token
    if state_stack
      @state_stack = state_stack
      install_value_stack(value_stack || [])
      @location_stack = location_stack
      @green_builder&.restore(green_stack || [])
      return begin_sync_recovery(context, token_data, recovery_observers)
    end

    return reject_without_recovery(
      context[:token_id], context[:token_display], context[:value], context[:location], context[:state],
      token_data, recovery_observers
    )
  end

  @recovery_shifts = RECOVERY_SHIFTS
  finish_recovery(
    context[:token_id], context[:token_display], context[:value], context[:location], context[:state],
    context[:value_stack], token_data, context[:reason], recovery_observers
  )
end

#fast_reduce(production_id, production, length) ⇒ [ :continue ]

RBS:

  • (Integer production_id, Hash[Symbol, untyped] production, Integer length) -> [:continue]

Parameters:

  • production_id (Integer)
  • production (Hash[Symbol, untyped])
  • length (Integer)

Returns:

  • ([ :continue ]) 


1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
 
# File 'lib/ibex/runtime/parser.rb', line 1494

def fast_reduce(production_id, production, length)
  action = production[:action]
  return fast_values_reduce(production_id, production, length, action) if action

  result = length.zero? ? nil : @value_stack.fetch(@value_stack.length - length)
  remaining = length
  while remaining.positive?
    @state_stack.pop
    @value_stack.pop
    remaining -= 1
  end
  next_state = table_lookup(parser_tables.fetch(:gotos), @state_stack.last, production.fetch(:lhs))
  raise ParseError, "(tables):1:1: missing goto for production #{production_id}" if next_state.nil?

  ensure_stack_capacity!
  @state_stack << next_state
  @value_stack << result
  CONTINUE_OUTCOME
end

#fast_reduction_eligible?(production, length) ⇒ Boolean

RBS:

  • (Hash[Symbol, untyped] production, untyped length) -> bool

Parameters:

  • production (Hash[Symbol, untyped])
  • length (Object)

Returns:

  • (Boolean) 


1485
1486
1487
1488
1489
1490
1491
 
# File 'lib/ibex/runtime/parser.rb', line 1485

def fast_reduction_eligible?(production, length)
  action = production[:action]
  return false if action && !generated_values_action?(production, action)

  length.is_a?(Integer) && !length.negative? &&
    length <= @value_stack.length && length < @state_stack.length
end

#fast_shift(next_state) ⇒ [ :continue ]

RBS:

  • (Integer next_state) -> [:continue]

Parameters:

  • next_state (Integer)

Returns:

  • ([ :continue ]) 


1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
 
# File 'lib/ibex/runtime/parser.rb', line 1472

def fast_shift(next_state)
  value = @lookahead_value
  ensure_stack_capacity!
  @state_stack << next_state
  @value_stack << value
  @lookahead = NO_LOOKAHEAD
  @lookahead_location = nil
  @runtime_lookahead_token_display = nil
  @recovery_shifts -= 1 if @recovery_shifts.positive?
  CONTINUE_OUTCOME
end

#fast_values_reduce(production_id, production, length, action) ⇒ Object

RBS:

  • (Integer production_id, Hash[Symbol, untyped] production, Integer length, Symbol action) -> untyped

Parameters:

  • production_id (Integer)
  • production (Hash[Symbol, untyped])
  • length (Integer)
  • action (Symbol)

Returns:

  • (Object) 


1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
 
# File 'lib/ibex/runtime/parser.rb', line 1515

def fast_values_reduce(production_id, production, length, action)
  hook_values = @value_stack.last(length)
  values = hook_values.dup
  remaining = length
  while remaining.positive?
    @state_stack.pop
    @value_stack.pop
    remaining -= 1
  end
  result = values_reduction_value(production, action, values, EMPTY_LOCATIONS, nil)
  refresh_runtime_fast_path_after_user_code!
  next_state = table_lookup(parser_tables.fetch(:gotos), @state_stack.last, production.fetch(:lhs))
  raise ParseError, "(tables):1:1: missing goto for production #{production_id}" if next_state.nil?

  ensure_stack_capacity!
  push_reduction_result(next_state, result, nil)
  trace_reduction(production_id, length, production.fetch(:lhs), result, next_state)
  unless @runtime_fast_path
    lookup = Object.instance_method(:method)
    unless runtime_method_unchanged?(lookup, :on_reduce, :__ibex_fast_path_on_reduce)
      on_reduce(production_id, hook_values, result)
    end
    unless runtime_method_unchanged?(lookup, :on_reduce_location, :__ibex_fast_path_on_reduce_location)
      on_reduce_location(production_id, hook_values, result, Array.new(length), nil)
    end
  end
  return accept_reduction(result) if @accept_requested
  return recover(report: false) if @semantic_error

  CONTINUE_OUTCOME
end

#finalize_cst(value) ⇒ Object

RBS:

  • (untyped value) -> untyped

Parameters:

  • value (Object)

Returns:

  • (Object) 


1795
1796
1797
1798
1799
 
# File 'lib/ibex/runtime/parser.rb', line 1795

def finalize_cst(value)
  return value unless cst_enabled?

  finalize_red_green_cst(value)
end

#finalize_failed_green_cst ⇒ void

This method returns an undefined value.

RBS:

  • () -> void



1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
 
# File 'lib/ibex/runtime/parser.rb', line 1995

def finalize_failed_green_cst
  builder = @green_builder || raise(ParseError, "(cst):1:1: Green builder is unavailable")
  kinds = @green_kinds || raise(ParseError, "(cst):1:1: kind metadata is unavailable")
  trailing = [] #: Array[CST::GreenNode | CST::GreenToken]
  builder.append_trailing_to_last_token(green_location_trivia(@lookahead_location, :cst_previous_trailing))
  leading = @green_pending_skipped + green_location_trivia(@lookahead_location, :leading_trivia)
  @green_pending_skipped.clear
  if @lookahead.equal?(NO_LOOKAHEAD)
    trailing << builder.make_token(EOF_TOKEN, "", leading: leading) unless leading.empty?
  elsif @lookahead == EOF_TOKEN
    trailing << builder.make_token(EOF_TOKEN, "", leading: leading)
  else
    kind = @lookahead.is_a?(Integer) && @lookahead >= 0 ? @lookahead : kinds.fetch(:lexical_error_token)
    trailing << builder.make_token(
      kind, green_token_text(@lookahead_value, @lookahead_location),
      leading: leading,
      flags: CST::Flags::CONTAINS_ERROR
    )
  end
  install_syntax_root(builder.finish_synthetic_root(trailing), kinds)
end

#finalize_lexical_green_cst(error) ⇒ void

This method returns an undefined value.

RBS:

  • (ParseError error) -> void

Parameters:



2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
 
# File 'lib/ibex/runtime/parser.rb', line 2018

def finalize_lexical_green_cst(error)
  builder = @green_builder || raise(ParseError, "(cst):1:1: Green builder is unavailable")
  kinds = @green_kinds || raise(ParseError, "(cst):1:1: kind metadata is unavailable")
  unmatched_text = cst_location_value(error.location, :ibex_cst_unmatched_text)
  text = if unmatched_text.is_a?(String)
           unmatched_text
         elsif error.token_value.is_a?(String)
           error.token_value
         else
           error.token_value.to_s
         end
  token = builder.make_token(
    kinds.fetch(:lexical_error_token), text,
    leading: pending_green_trivia + green_location_trivia(error.location, :leading_trivia),
    flags: CST::Flags::CONTAINS_ERROR
  )
  file = cst_location_value(error.location, :file)
  install_syntax_root(
    builder.finish_synthetic_root([token]), kinds,
    file: file.is_a?(String) ? file : nil
  )
end

#finalize_red_green_cst(value) ⇒ Object

RBS:

  • (untyped value) -> untyped

Parameters:

  • value (Object)

Returns:

  • (Object) 


1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
 
# File 'lib/ibex/runtime/parser.rb', line 1967

def finalize_red_green_cst(value)
  builder = @green_builder || raise(ParseError, "(cst):1:1: Green builder is unavailable")
  kinds = @green_kinds || raise(ParseError, "(cst):1:1: kind metadata is unavailable")
  incomplete = @lookahead != EOF_TOKEN
  unless incomplete || @green_reused_right_edge
    builder.append_trailing_to_last_token(green_location_trivia(@lookahead_location, :cst_previous_trailing))
  end
  empty_trivia = [] #: Array[CST::GreenTrivia]
  eof_leading = incomplete ? empty_trivia : green_location_trivia(@lookahead_location, :leading_trivia)
  if @green_pending_skipped.empty?
    leading = eof_leading
  else
    leading = @green_pending_skipped + eof_leading
    @green_pending_skipped.clear
  end
  eof = builder.make_token(EOF_TOKEN, "", leading: leading)
  @green_token_states << green_lexer_state(@lookahead_location)
  green = if builder.size == 1
            builder.finish_source_file(eof, incomplete: incomplete)
          else
            builder.finish_synthetic_root([eof], incomplete: incomplete)
          end
  install_syntax_root(green, kinds)
  install_parse_memo(green)
  value
end

#finish(location: nil) ⇒ Object

Supply EOF to a caller-driven parser session and return its result.

RBS:

  • (?location: untyped) -> untyped

Parameters:

  • location: (Object) (defaults to: nil)

Returns:

  • (Object) 


461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
 
# File 'lib/ibex/runtime/parser.rb', line 461

def finish(location: nil)
  run_push_driver do
    start_push_session
    refresh_runtime_fast_path_after_user_code!
    if @repair_policy
      enqueue_or_assign_repair_input(
        RepairInput.new(token_id: EOF_TOKEN, token_name: token_to_str(EOF_TOKEN), value: nil, location: location)
      )
    else
      @lookahead = EOF_TOKEN
      @lookahead_value = nil
      @lookahead_location = location
      @runtime_fast_path = false unless nil.equal?(location)
      materialize_compatible_lookahead
    end
    outcome = run_push_lookahead
    return outcome.fetch(1) if outcome.is_a?(Array)

    raise ParseError, "(input):1:1: parser requested input after EOF"
  end
end

#finish_push_session ⇒ void

This method returns an undefined value.

RBS:

  • () -> void



1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
 
# File 'lib/ibex/runtime/parser.rb', line 1216

def finish_push_session
  @push_status = :finished
  @source = nil
  @lookahead = NO_LOOKAHEAD
  @lookahead_location = nil
  @repair_input_buffer = nil
  @repair_selected = false
  @runtime_parser_tables = nil
  @runtime_fast_path = false
  clear_sync_recovery
end

#finish_recovery(token_id, token_display, value, location, original_state, value_stack, token_data, reason, observers) ⇒ [ :continue ]

RBS:

  • (untyped token_id, untyped token_display, untyped value, untyped location, Integer original_state, Array[untyped] value_stack, Hash[String, untyped]? token_data, String reason, Array[Proc]? observers) -> [:continue]

Parameters:

  • token_id (Object)
  • token_display (Object)
  • value (Object)
  • location (Object)
  • original_state (Integer)
  • value_stack (Array[untyped])
  • token_data (Hash[String, untyped], nil)
  • reason (String)
  • observers (Array[Proc], nil)

Returns:

  • ([ :continue ]) 


2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
 
# File 'lib/ibex/runtime/parser.rb', line 2351

def finish_recovery(
  token_id, token_display, value, location, original_state, value_stack, token_data, reason, observers
)
  recover_data = if observers
                   token_data || runtime_original_token_data(
                     token_id, token_display, value, location, original_state
                   )
                 end
  on_error_recover(token_id, value, value_stack)
  on_error_recover_location(token_id, value, value_stack, location, @state_stack.last)
  if recover_data
    emit_runtime_event(
      :recover,
      recover_data.merge(
        "from_state" => original_state,
        "state" => @state_stack.last,
        "reason" => reason
      ),
      observers: observers
    )
  end
  CONTINUE_OUTCOME
end

#generated_action_contract_cache_accessible? ⇒ Boolean

Ruby 3.0-3.3 expose the main Ractor as an object instead of exposing Ractor.main?. Class instance variables cannot be read or written from another Ractor on those versions.

RBS:

  • () -> bool

Returns:

  • (Boolean) 


1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
 
# File 'lib/ibex/runtime/parser.rb', line 1345

def generated_action_contract_cache_accessible?
  return true unless Object.const_defined?(:Ractor, false)

  ractor = Object.const_get(:Ractor)
  return ractor.__send__(:main?) if ractor.respond_to?(:main?)
  return ractor.__send__(:current).equal?(ractor.__send__(:main)) if
    ractor.respond_to?(:current) && ractor.respond_to?(:main)

  true
end

#generated_action_contracts_validated?(tables) ⇒ Boolean

Generated parser tables are deeply frozen before they can cross a Ractor boundary. Their action-marker contract only needs one scan per parser class and exact table object, including across parser instances. Mutable application tables remain intentionally uncached.

RBS:

  • (Hash[Symbol, untyped] tables) -> bool

Parameters:

  • tables (Hash[Symbol, untyped])

Returns:

  • (Boolean) 


1323
1324
1325
1326
1327
1328
 
# File 'lib/ibex/runtime/parser.rb', line 1323

def generated_action_contracts_validated?(tables)
  return false unless generated_action_contract_cache_accessible?

  cached = self.class.instance_variable_get(:@__ibex_validated_parser_tables)
  cached.equal?(tables)
end

#generated_action_symbol?(action) ⇒ Boolean

RBS:

  • (untyped action) -> bool

Parameters:

  • action (Object)

Returns:

  • (Boolean) 


1775
1776
1777
 
# File 'lib/ibex/runtime/parser.rb', line 1775

def generated_action_symbol?(action)
  action.is_a?(Symbol) && action.name.match?(GENERATED_ACTION_NAME)
end

#generated_composition_action?(production, action) ⇒ Boolean

RBS:

  • (Hash[Symbol, untyped] production, untyped action) -> bool

Parameters:

  • production (Hash[Symbol, untyped])
  • action (Object)

Returns:

  • (Boolean) 


1768
1769
1770
1771
1772
 
# File 'lib/ibex/runtime/parser.rb', line 1768

def generated_composition_action?(production, action)
  parser_tables.fetch(:format_version) >= 3 &&
    production[:composition_action] == true &&
    generated_location_action?(production, action)
end

#generated_location_action?(production, action) ⇒ Boolean

RBS:

  • (Hash[Symbol, untyped] production, untyped action) -> bool

Parameters:

  • production (Hash[Symbol, untyped])
  • action (Object)

Returns:

  • (Boolean) 


1747
1748
1749
1750
1751
 
# File 'lib/ibex/runtime/parser.rb', line 1747

def generated_location_action?(production, action)
  parser_tables.fetch(:format_version) >= 2 &&
    production[:location_action] == true &&
    generated_action_symbol?(action)
end

#generated_positional_action?(production, action) ⇒ Boolean

RBS:

  • (Hash[Symbol, untyped] production, untyped action) -> bool

Parameters:

  • production (Hash[Symbol, untyped])
  • action (Object)

Returns:

  • (Boolean) 


1761
1762
1763
1764
1765
 
# File 'lib/ibex/runtime/parser.rb', line 1761

def generated_positional_action?(production, action)
  parser_tables.fetch(:format_version) >= 5 &&
    production[:positional_action] == true &&
    generated_action_symbol?(action)
end

#generated_values_action?(production, action) ⇒ Boolean

RBS:

  • (Hash[Symbol, untyped] production, untyped action) -> bool

Parameters:

  • production (Hash[Symbol, untyped])
  • action (Object)

Returns:

  • (Boolean) 


1754
1755
1756
1757
1758
 
# File 'lib/ibex/runtime/parser.rb', line 1754

def generated_values_action?(production, action)
  parser_tables.fetch(:format_version) >= 4 &&
    production[:values_action] == true &&
    generated_action_symbol?(action)
end

#green_lexer_state(location) ⇒ Symbol

RBS:

  • (untyped location) -> Symbol

Parameters:

  • location (Object)

Returns:

  • (Symbol) 


2099
2100
2101
2102
2103
2104
2105
2106
 
# File 'lib/ibex/runtime/parser.rb', line 2099

def green_lexer_state(location)
  state = if location.is_a?(Hash) && location.key?(:ibex_lexer_start_state)
            location[:ibex_lexer_start_state]
          else
            cst_location_value(location, :ibex_lexer_start_state)
          end
  state ? state.to_sym : :INITIAL
end

#green_location_trivia(location, key) ⇒ Array[CST::GreenTrivia]

RBS:

  • (untyped location, Symbol key) -> Array[CST::GreenTrivia]

Parameters:

  • location (Object)
  • key (Symbol)

Returns:



1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
 
# File 'lib/ibex/runtime/parser.rb', line 1953

def green_location_trivia(location, key)
  trivia = if location.is_a?(Hash) && location.key?(:ibex_lexer_start_state)
             location[key]
           else
             cst_location_value(location, key)
           end
  return EMPTY_GREEN_TRIVIA unless trivia.is_a?(Array)
  return trivia if trivia.frozen?
  return trivia if trivia.all?(CST::GreenTrivia)

  trivia.grep(CST::GreenTrivia)
end

#green_token_text(value, location) ⇒ String

RBS:

  • (untyped value, untyped location) -> String

Parameters:

  • value (Object)
  • location (Object)

Returns:

  • (String) 


1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
 
# File 'lib/ibex/runtime/parser.rb', line 1940

def green_token_text(value, location)
  text = if location.is_a?(Hash) && location.key?(:ibex_lexer_start_state)
           location[:ibex_cst_text]
         else
           cst_location_value(location, :ibex_cst_text)
         end
  return text if text.is_a?(String)
  return value if value.is_a?(String)

  ""
end

#initialize_runtime_fast_path(tables) ⇒ void

This method returns an undefined value.

RBS:

  • (Hash[Symbol, untyped] tables) -> void

Parameters:

  • tables (Hash[Symbol, untyped]) 


2821
2822
2823
2824
2825
2826
2827
2828
 
# File 'lib/ibex/runtime/parser.rb', line 2821

def initialize_runtime_fast_path(tables)
  @location_stack = track_locations?(tables) ? [] : nil
  @runtime_fast_path = runtime_fast_path_eligible?(tables)
  return unless @runtime_fast_path
  return if @runtime_fast_path_tracker_installed

  install_runtime_fast_path_tracker!
end

#initialize_runtime_state(resource_limits, preserve_existing:) ⇒ void

This method returns an undefined value.

rubocop:disable Metrics/AbcSize, Metrics/CyclomaticComplexity, Metrics/MethodLength, Metrics/PerceivedComplexity The explicit branches keep every runtime ivar typed while preserving application-owned values.

RBS:

  • (ResourceLimits resource_limits, preserve_existing: bool) -> void

Parameters:



703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
 
# File 'lib/ibex/runtime/parser.rb', line 703

def initialize_runtime_state(resource_limits, preserve_existing:)
  @resource_limits = resource_limits unless preserve_existing && defined?(@resource_limits)
  @yydebug = false unless preserve_existing && defined?(@yydebug)
  @yydebug_output = $stderr unless preserve_existing && defined?(@yydebug_output)
  @source = nil unless preserve_existing && defined?(@source)
  @state_stack = [] unless preserve_existing && defined?(@state_stack)
  install_value_stack([]) unless preserve_existing && defined?(@value_stack)
  @location_stack = nil unless preserve_existing && defined?(@location_stack)
  @lookahead = NO_LOOKAHEAD unless preserve_existing && defined?(@lookahead)
  @lookahead_value = nil unless preserve_existing && defined?(@lookahead_value)
  @lookahead_location = nil unless preserve_existing && defined?(@lookahead_location)
  @recovery_shifts = 0 unless preserve_existing && defined?(@recovery_shifts)
  @semantic_error = false unless preserve_existing && defined?(@semantic_error)
  @accept_requested = false unless preserve_existing && defined?(@accept_requested)
  @unknown_token_id = nil unless preserve_existing && defined?(@unknown_token_id)
  @push_status = :idle unless preserve_existing && defined?(@push_status)
  @driver_status = :idle unless preserve_existing && defined?(@driver_status)
  @runtime_driver_thread = nil unless preserve_existing && defined?(@runtime_driver_thread)
  @runtime_observers = nil unless preserve_existing && defined?(@runtime_observers)
  @runtime_event_sequence = 0 unless preserve_existing && defined?(@runtime_event_sequence)
  @runtime_lookahead_token_display = nil unless preserve_existing && defined?(@runtime_lookahead_token_display)
  @runtime_observation_mutex = Mutex.new unless preserve_existing && defined?(@runtime_observation_mutex)
  @repair_policy = nil unless preserve_existing && defined?(@repair_policy)
  @repair_input_buffer = nil unless preserve_existing && defined?(@repair_input_buffer)
  @repair_selected = false unless preserve_existing && defined?(@repair_selected)
  @semantic_locations = nil unless preserve_existing && defined?(@semantic_locations)
  @semantic_location_names = nil unless preserve_existing && defined?(@semantic_location_names)
  @semantic_result_location = nil unless preserve_existing && defined?(@semantic_result_location)
  @trace_value_printer = nil unless preserve_existing && defined?(@trace_value_printer)
  @sync_recovery_context = nil unless preserve_existing && defined?(@sync_recovery_context)
  @sync_recovery_token_data = nil unless preserve_existing && defined?(@sync_recovery_token_data)
  @sync_recovery_observers = nil unless preserve_existing && defined?(@sync_recovery_observers)
  @green_builder = nil unless preserve_existing && defined?(@green_builder)
  @green_kinds = nil unless preserve_existing && defined?(@green_kinds)
  @green_cache = nil unless preserve_existing && defined?(@green_cache)
  @syntax_root = nil unless preserve_existing && defined?(@syntax_root)
  @syntax_diagnostics = [] unless preserve_existing && defined?(@syntax_diagnostics)
  @green_pending_skipped = [] unless preserve_existing && defined?(@green_pending_skipped)
  @recovery_attempts = 0 unless preserve_existing && defined?(@recovery_attempts)
  @runtime_parser_tables = nil unless preserve_existing && defined?(@runtime_parser_tables)
  @runtime_fast_path = false unless preserve_existing && defined?(@runtime_fast_path)
  @runtime_fast_path_tracker_installed = false unless
    preserve_existing && defined?(@runtime_fast_path_tracker_installed)
  @runtime_fast_path_hooks_mutated = false unless
    preserve_existing && defined?(@runtime_fast_path_hooks_mutated)
  @runtime_fast_path_singleton_ancestors = nil unless
    preserve_existing && defined?(@runtime_fast_path_singleton_ancestors)
  @syntax_only = false unless preserve_existing && defined?(@syntax_only)
  @green_cache_override = nil unless preserve_existing && defined?(@green_cache_override)
  @green_token_states = [] unless preserve_existing && defined?(@green_token_states)
  @green_memo_stack = [] unless preserve_existing && defined?(@green_memo_stack)
  @green_parse_memo_valid = false unless preserve_existing && defined?(@green_parse_memo_valid)
  @green_initial_state = 0 unless preserve_existing && defined?(@green_initial_state)
  @syntax_parse_memo = nil unless preserve_existing && defined?(@syntax_parse_memo)
  @green_reused_right_edge = false unless preserve_existing && defined?(@green_reused_right_edge)
  @incremental_reused_descendants = 0 unless
    preserve_existing && defined?(@incremental_reused_descendants)
end

#install_parse_memo(green) ⇒ void

This method returns an undefined value.

RBS:

  • (CST::GreenNode green) -> void

Parameters:



2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
 
# File 'lib/ibex/runtime/parser.rb', line 2082

def install_parse_memo(green)
  return unless @green_parse_memo_valid && @green_memo_stack.one?

  states = [@green_initial_state] #: Array[Integer?]
  @green_memo_stack.fetch(0).append_to(states)
  states << @state_stack.last
  return unless states.length == green.descendant_count

  @syntax_parse_memo = CST::ParseMemo.new(
    left_states: states,
    grammar_digest: parser_tables.fetch(:grammar_digest),
    state_count: parser_tables.fetch(:state_count),
    production_count: parser_tables.fetch(:production_count)
  )
end

#install_runtime_fast_path_class_tracker! ⇒ void

This method returns an undefined value.

RBS:

  • () -> void



2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
 
# File 'lib/ibex/runtime/parser.rb', line 2842

def install_runtime_fast_path_class_tracker!
  parser_class = self.class
  return if parser_class.instance_variable_get(:@__ibex_fast_path_class_tracker_installed) == true

  singleton = parser_class.singleton_class
  singleton.prepend(FastPathClassMutationTracker)
  parser_class.instance_variable_set(:@__ibex_fast_path_hook_version, 0)
  parser_class.instance_variable_set(:@__ibex_fast_path_class_tracker_installed, true)
rescue FrozenError, TypeError
  nil
end

#install_runtime_fast_path_tracker!(singleton = nil) ⇒ void

This method returns an undefined value.

RBS:

  • (?Class? singleton) -> void

Parameters:

  • singleton (Class, nil) (defaults to: nil) 


2831
2832
2833
2834
2835
2836
2837
2838
2839
 
# File 'lib/ibex/runtime/parser.rb', line 2831

def install_runtime_fast_path_tracker!(singleton = nil)
  singleton ||= Object.instance_method(:singleton_class).bind_call(self)
  Module.instance_method(:prepend).bind_call(singleton, FastPathMutationTracker)
  @runtime_fast_path_tracker_installed = true
  @runtime_fast_path_hooks_mutated = false
  @runtime_fast_path_singleton_ancestors = singleton.ancestors.freeze
rescue FrozenError, TypeError
  @runtime_fast_path = false
end

#install_syntax_root(green, kinds, file: nil) ⇒ void

This method returns an undefined value.

RBS:

  • (CST::GreenNode green, CST::Kind kinds, ?file: String?) -> void

Parameters:



2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
 
# File 'lib/ibex/runtime/parser.rb', line 2049

def install_syntax_root(green, kinds, file: nil)
  config = parser_tables.fetch(:cst)
  policy = config.fetch(:trivia_policy)
  location_file = cst_location_value(@lookahead_location, :file)
  source_file = file || (location_file if location_file.is_a?(String))
  source = CST::SourceText.new(green.to_source.freeze, file: source_file)
  @syntax_root = CST::SyntaxNode.new(
    green: green, kinds: kinds, trivia_policy: policy, source_text: source
  )
  emit_incremental_event(
    :cst_built,
    {
      "descendant_count" => green.descendant_count,
      "full_width" => green.full_width,
      "contains_error" => green.flags.anybits?(CST::Flags::CONTAINS_ERROR)
    }
  )
end

#install_value_stack(values) ⇒ void

This method returns an undefined value.

Keep the two historical value-stack names as read-compatible aliases. Applications must not mutate or replace these internal arrays.

RBS:

  • (Array[untyped] values) -> void

Parameters:

  • values (Array[untyped]) 


773
774
775
776
777
 
# File 'lib/ibex/runtime/parser.rb', line 773

def install_value_stack(values)
  @value_stack = values
  @vstack = values
  @racc_vstack = values
end

#internal_token_id(external_token) ⇒ Integer

RBS:

  • (untyped external_token) -> Integer

Parameters:

  • external_token (Object)

Returns:

  • (Integer) 


2738
2739
2740
2741
2742
2743
2744
 
# File 'lib/ibex/runtime/parser.rb', line 2738

def internal_token_id(external_token)
  token_id = parser_tables.fetch(:tokens)[external_token]
  return token_id if token_id

  @unknown_token_name = external_token.inspect
  @unknown_token_id = -external_token.object_id.abs
end

#load_parser_tables ⇒ Hash[Symbol, untyped]

RBS:

  • () -> Hash[Symbol, untyped]

Returns:

  • (Hash[Symbol, untyped]) 


2755
2756
2757
2758
2759
 
# File 'lib/ibex/runtime/parser.rb', line 2755

def load_parser_tables
  self.class.__send__(:parser_tables)
rescue NoMethodError
  raise ParseError, "(tables):1:1: #{self.class} must define .parser_tables"
end

#loc(reference) ⇒ Object

Return the location of a one-based RHS position or named reference while a semantic action is running.

RBS:

  • (Integer | Symbol | String reference) -> untyped

Parameters:

  • reference (Integer, Symbol, String)

Returns:

  • (Object) 


650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
 
# File 'lib/ibex/runtime/parser.rb', line 650

def loc(reference)
  locations = @semantic_locations
  raise ParseError, "(runtime):1:1: loc is only available inside a semantic action" unless locations

  index = if reference.is_a?(Integer)
            raise ArgumentError, "location index must be positive" unless reference.positive?

            reference - 1
          else
            names = @semantic_location_names || EMPTY_LOCATION_NAMES
            names.fetch(reference.to_sym) do
              raise ArgumentError, "unknown named location #{reference.inspect}"
            end
          end
  locations.fetch(index) { raise ArgumentError, "location index #{reference.inspect} is outside the RHS" }
end

#materialize_compatible_lookahead ⇒ void

This method returns an undefined value.

RBS:

  • () -> void



2651
2652
2653
2654
2655
2656
2657
2658
 
# File 'lib/ibex/runtime/parser.rb', line 2651

def materialize_compatible_lookahead
  if @runtime_fast_path
    @runtime_lookahead_token_display = nil
  else
    token_display = materialize_lookahead_token_display!
    trace("read #{token_display}") if @yydebug
  end
end

#materialize_lookahead_token_display! ⇒ String

RBS:

  • () -> String

Returns:

  • (String) 


2661
2662
2663
2664
2665
2666
 
# File 'lib/ibex/runtime/parser.rb', line 2661

def materialize_lookahead_token_display!
  token_display = @runtime_lookahead_token_display
  return token_display if token_display

  @runtime_lookahead_token_display = token_to_str(@lookahead)
end

#next_token ⇒ [ untyped, untyped ], ...

Override in pull parsers. Return [token, value], [token, value, location], false, or nil.

RBS:

  • () -> ([untyped, untyped] | [untyped, untyped, untyped] | false | nil)

Returns:

  • ([ untyped, untyped ], [ untyped, untyped, untyped ], false, nil) 


509
510
511
 
# File 'lib/ibex/runtime/parser.rb', line 509

def next_token
  raise NotImplementedError, "(input):1:1: next_token must be implemented"
end

#normalized_token_word(token_name) ⇒ String?

RBS:

  • (String token_name) -> String?

Parameters:

  • token_name (String)

Returns:

  • (String, nil) 


2788
2789
2790
2791
 
# File 'lib/ibex/runtime/parser.rb', line 2788

def normalized_token_word(token_name)
  word = token_name.delete_prefix(":")
  word.upcase if word.match?(/\A[A-Za-z_][A-Za-z0-9_]*\z/)
end

#notify_error_handler(context, repair) ⇒ void

This method returns an undefined value.

RBS:

  • (Hash[Symbol, untyped] context, untyped repair) -> void

Parameters:

  • context (Hash[Symbol, untyped])
  • repair (Object) 


2271
2272
2273
2274
2275
2276
2277
2278
 
# File 'lib/ibex/runtime/parser.rb', line 2271

def notify_error_handler(context, repair)
  @repair_selected = repair.is_a?(RepairPlan)
  begin
    on_error(context[:token_id], context[:value], context.fetch(:value_stack).dup)
  ensure
    @repair_selected = false
  end
end

#on_discard(_token_id, _value, _location, _reason) ⇒ void

This method returns an undefined value.

Called when yacc recovery discards an application token.

RBS:

  • (Integer token_id, untyped value, untyped location, Symbol reason) -> void

Parameters:

  • token_id (Integer)
  • value (Object)
  • location (Object)
  • reason (Symbol) 


570
 
# File 'lib/ibex/runtime/parser.rb', line 570

def on_discard(_token_id, _value, _location, _reason); end

#on_error(token_id, value, _value_stack) ⇒ Object

Override to recover from syntax errors. The default raises unless a bounded automatic repair has already been selected.

RBS:

  • (Integer token_id, untyped value, Array[untyped] value_stack) -> untyped

Parameters:

  • token_id (Integer)
  • value (Object)
  • value_stack (Array[untyped])

Returns:

  • (Object) 


516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
 
# File 'lib/ibex/runtime/parser.rb', line 516

def on_error(token_id, value, _value_stack)
  return if @repair_selected
  return if cst_enabled?

  expected = expected_tokens
  token_name = token_to_str(token_id)
  state = @state_stack.last
  configured = parser_tables.fetch(:error_messages, EMPTY_ROW)[state]
  error_id, detail = configured_error_message(configured)
  raise ParseError.new(
    token_id: token_id,
    token_name: token_name,
    token_value: value,
    expected_tokens: expected,
    location: @lookahead_location,
    state: state,
    suggestions: token_suggestions(token_name, expected),
    error_id: error_id,
    detail: detail
  )
end

#on_error_recover(_token_id, _value, _value_stack) ⇒ void

This method returns an undefined value.

Called after the synthetic error token enters a recovery state. The payload describes the original error before recovery popped stacks.

RBS:

  • (Integer token_id, untyped value, Array[untyped] value_stack) -> void

Parameters:

  • token_id (Integer)
  • value (Object)
  • value_stack (Array[untyped]) 


561
 
# File 'lib/ibex/runtime/parser.rb', line 561

def on_error_recover(_token_id, _value, _value_stack); end

#on_error_recover_location(_token_id, _value, _value_stack, _location, _state) ⇒ void

This method returns an undefined value.

Location-aware recovery observer.

RBS:

  • (Integer token_id, untyped value, Array[untyped] value_stack, untyped location, Integer state) -> void

Parameters:

  • token_id (Integer)
  • value (Object)
  • value_stack (Array[untyped])
  • location (Object)
  • state (Integer) 


566
 
# File 'lib/ibex/runtime/parser.rb', line 566

def on_error_recover_location(_token_id, _value, _value_stack, _location, _state); end

#on_reduce(_production_id, _values, _result) ⇒ void Also known as: __ibex_fast_path_on_reduce

This method returns an undefined value.

Called after a production's semantic action and goto are committed. Override to observe its id, RHS values, and semantic result.

RBS:

  • (Integer production_id, Array[untyped] values, untyped result) -> void

Parameters:

  • production_id (Integer)
  • values (Array[untyped])
  • result (Object) 


551
 
# File 'lib/ibex/runtime/parser.rb', line 551

def on_reduce(_production_id, _values, _result); end

#on_reduce_location(_production_id, _values, _result, _locations, _result_location) ⇒ void Also known as: __ibex_fast_path_on_reduce_location

This method returns an undefined value.

Location-aware reduction observer.

RBS:

  • (Integer production_id, Array[untyped] values, untyped result, Array[untyped] locations, untyped result_location) -> void

Parameters:

  • production_id (Integer)
  • values (Array[untyped])
  • result (Object)
  • locations (Array[untyped])
  • result_location (Object) 


556
 
# File 'lib/ibex/runtime/parser.rb', line 556

def on_reduce_location(_production_id, _values, _result, _locations, _result_location); end

#on_repair(_plan) ⇒ void

This method returns an undefined value.

Called once after a repair is selected and before its edited token prefix is replayed through normal parser actions.

RBS:

  • (RepairPlan plan) -> void

Parameters:



586
 
# File 'lib/ibex/runtime/parser.rb', line 586

def on_repair(_plan); end

#on_shift(_token_id, _value, _state) ⇒ void Also known as: __ibex_fast_path_on_shift

This method returns an undefined value.

Called after an ordinary input token is shifted. Override to observe the internal token id, semantic value, and destination state.

RBS:

  • (Integer token_id, untyped value, Integer state) -> void

Parameters:

  • token_id (Integer)
  • value (Object)
  • state (Integer) 


541
 
# File 'lib/ibex/runtime/parser.rb', line 541

def on_shift(_token_id, _value, _state); end

#on_shift_location(_token_id, _value, _state, _location) ⇒ void Also known as: __ibex_fast_path_on_shift_location

This method returns an undefined value.

Location-aware shift observer. The compatible hook above retains its original signature and runs first.

RBS:

  • (Integer token_id, untyped value, Integer state, untyped location) -> void

Parameters:

  • token_id (Integer)
  • value (Object)
  • state (Integer)
  • location (Object) 


546
 
# File 'lib/ibex/runtime/parser.rb', line 546

def on_shift_location(_token_id, _value, _state, _location); end

#parse_syntax_token_source(source, cache) ⇒ CST::SyntaxResult

RBS:

  • (untyped source, CST::NodeCache cache) -> CST::SyntaxResult

Parameters:

Returns:



2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
 
# File 'lib/ibex/runtime/parser.rb', line 2122

def parse_syntax_token_source(source, cache)
  with_syntax_only(cache) do
    value = drive_parser(source)
    parsed = syntax_parse_result(value)
    CST::SyntaxResult.new(
      syntax_root: parsed.syntax_root,
      diagnostics: parsed.diagnostics,
      reused_ratio: 0.0
    )
  end
end

#parse_with_syntax ⇒ CST::ParseResult

Parse through next_token and return both the semantic value and Red root.

RBS:

  • () -> CST::ParseResult

Returns:



414
415
416
 
# File 'lib/ibex/runtime/parser.rb', line 414

def parse_with_syntax
  syntax_parse_result(do_parse)
end

#parser_state_count(tables) ⇒ Integer

RBS:

  • (Hash[Symbol, untyped] tables) -> Integer

Parameters:

  • tables (Hash[Symbol, untyped])

Returns:

  • (Integer) 


813
814
815
816
817
818
819
820
821
822
 
# File 'lib/ibex/runtime/parser.rb', line 813

def parser_state_count(tables)
  state_count = tables[:state_count]
  return state_count if state_count.is_a?(Integer)

  actions = tables.fetch(:actions)
  state_count = actions.respond_to?(:row_count) ? actions.row_count : actions.length
  return state_count if state_count.is_a?(Integer)

  raise ParseError, "(tables):1:1: parser table state count must be an Integer"
end

#parser_tables ⇒ Hash[Symbol, untyped]

RBS:

  • () -> Hash[Symbol, untyped]

Returns:

  • (Hash[Symbol, untyped]) 


2747
2748
2749
2750
2751
2752
 
# File 'lib/ibex/runtime/parser.rb', line 2747

def parser_tables
  tables = @runtime_parser_tables
  return tables if tables

  load_parser_tables
end

#pending_green_trivia ⇒ Array[CST::GreenTrivia]

RBS:

  • () -> Array[CST::GreenTrivia]

Returns:



2042
2043
2044
2045
2046
 
# File 'lib/ibex/runtime/parser.rb', line 2042

def pending_green_trivia
  return [] unless respond_to?(:take_cst_pending_green_trivia, true)

  __send__(:take_cst_pending_green_trivia)
end

#perform(action) ⇒ Object

RBS:

  • (untyped action) -> untyped

Parameters:

  • action (Object)

Returns:

  • (Object) 


1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
 
# File 'lib/ibex/runtime/parser.rb', line 1443

def perform(action)
  case action.first
  when :shift
    next_state = action.fetch(1)
    @runtime_fast_path ? fast_shift(next_state) : shift(next_state)
  when :reduce
    production_id = action.fetch(1)
    if @runtime_fast_path
      production = parser_tables.fetch(:productions).fetch(production_id)
      length = production.fetch(:length)
      return fast_reduce(production_id, production, length) if fast_reduction_eligible?(production, length)
    end

    reduce(production_id, production)
  when :accept
    result = finalize_cst(@value_stack.last)
    emit_accept_event(EventSanitizer.value(result), "table") if @runtime_observers
    [:accepted, result]
  when :error
    materialize_lookahead_token_display!
    recover
  when :sync_recover
    materialize_lookahead_token_display!
    continue_sync_recovery
  else raise ParseError, "(tables):1:1: unknown parser action #{action.inspect}"
  end
end

#pop_reduction_locations(length) ⇒ Array[untyped]

RBS:

  • (Integer length) -> Array[untyped]

Parameters:

  • length (Integer)

Returns:

  • (Array[untyped]) 


2986
2987
2988
2989
2990
2991
2992
2993
 
# File 'lib/ibex/runtime/parser.rb', line 2986

def pop_reduction_locations(length)
  stack = @location_stack
  return Array.new(length) unless stack

  locations = stack.last(length)
  stack.pop(length)
  locations
end

#positional_action_contract?(production) ⇒ Boolean

RBS:

  • (Hash[Symbol, untyped] production) -> bool

Parameters:

  • production (Hash[Symbol, untyped])

Returns:

  • (Boolean) 


1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
 
# File 'lib/ibex/runtime/parser.rb', line 1408

def positional_action_contract?(production)
  production[:length].is_a?(Integer) &&
    production[:length].between?(0, 4) &&
    generated_action_symbol?(production[:action]) &&
    production[:values_action] != true &&
    production[:borrowed_values_action] != true &&
    production[:location_action] != true &&
    production[:composition_action] != true &&
    production.fetch(:location_context_length, 0).zero?
end

#prepare_green_cst(tables) ⇒ void

This method returns an undefined value.

RBS:

  • (Hash[Symbol, untyped] tables) -> void

Parameters:

  • tables (Hash[Symbol, untyped]) 


1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
 
# File 'lib/ibex/runtime/parser.rb', line 1829

def prepare_green_cst(tables)
  @syntax_root = nil
  @syntax_parse_memo = nil
  @syntax_diagnostics.clear
  @green_pending_skipped.clear
  config = tables[:cst]
  unless config.is_a?(Hash)
    @green_builder = nil
    @green_kinds = nil
    @green_cache = nil
    return
  end

  kinds = tables[:cst_kinds]
  kinds = CST::Kind.new(config.fetch(:kinds), slots: config.fetch(:slots)) unless kinds.is_a?(CST::Kind)
  cache = @green_cache_override || CST::NodeCache.new
  @green_kinds = kinds
  @green_cache = cache
  @green_token_states.clear
  @green_memo_stack.clear
  @green_parse_memo_valid = true
  @green_initial_state = @state_stack.first || 0
  @green_reused_right_edge = false
  @incremental_reused_descendants = 0
  @green_builder = CST::GreenBuilder.new(kinds: kinds, cache: cache)
end

#prepare_parse(source, initial_state: nil) ⇒ void

This method returns an undefined value.

RBS:

  • ((^() -> untyped)? source, ?initial_state: Integer?) -> void

Parameters:

  • source (^() -> untyped, nil)
  • initial_state: (Integer, nil) (defaults to: nil) 


1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
 
# File 'lib/ibex/runtime/parser.rb', line 1229

def prepare_parse(source, initial_state: nil)
  @runtime_parser_tables = load_parser_tables
  tables = validate_parser_table_format!
  initial_state = resolve_initial_state(tables, initial_state)

  @source = source
  @state_stack.clear << initial_state
  @value_stack.clear
  initialize_runtime_fast_path(tables)
  @lookahead = NO_LOOKAHEAD
  @lookahead_value = nil
  @lookahead_location = nil
  @runtime_lookahead_token_display = nil
  reset_parse_recovery_state
  @accept_requested = false
  @unknown_token_id = nil
  reset_cst_results(tables)
  @recovery_attempts = 0
  trace("start state #{initial_state}") if @yydebug
  @runtime_event_sequence = 0
  return unless @runtime_observers

  emit_runtime_event(
    :start,
    {
      "driver" => @driver_status.to_s,
      "initial_state" => initial_state,
      "table_format_version" => tables.fetch(:format_version),
      "grammar_digest" => tables[:grammar_digest],
      "state_count" => tables[:state_count],
      "production_count" => tables[:production_count]
    }
  )
end

#preserve_deleted_repair_input(input) ⇒ void

This method returns an undefined value.

Retain a repair deletion in the concrete tree even though it is absent from the repaired token stream.

RBS:

  • (RepairInput input) -> void

Parameters:



2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
 
# File 'lib/ibex/runtime/parser.rb', line 2553

def preserve_deleted_repair_input(input)
  return unless cst_enabled?

  builder = @green_builder
  kinds = @green_kinds
  return unless builder && kinds

  previous = green_location_trivia(input.location, :cst_previous_trailing)
  empty = [] #: Array[CST::GreenTrivia]
  previous = empty if builder.append_trailing_to_last_token(previous)
  leading = previous + green_location_trivia(input.location, :leading_trivia)
  source = leading.each_with_object(String.new(encoding: Encoding::BINARY)) do |trivia, text|
    text << trivia.text
  end
  source << green_token_text(input.value, input.location)
  @green_pending_skipped << CST::GreenTrivia.new(
    kind: kinds.fetch(:skipped_tokens), text: source
  )
end

#publish_error_context(context) ⇒ [ Hash[String, untyped]?, Array[Proc]? ]

RBS:

  • (Hash[Symbol, untyped] context) -> [Hash[String, untyped]?, Array[Proc]?]

Parameters:

  • context (Hash[Symbol, untyped])

Returns:

  • ([ Hash[String, untyped]?, Array[Proc]? ]) 


2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
 
# File 'lib/ibex/runtime/parser.rb', line 2257

def publish_error_context(context)
  error_observers = runtime_observer_snapshot if @runtime_observers
  if error_observers
    token_data = runtime_original_token_data(
      context[:token_id], context[:token_display], context[:value], context[:location], context[:state]
    )
    emit_runtime_event(
      :error, token_data.merge("reason" => context[:reason]), observers: error_observers
    )
  end
  [token_data, (runtime_observer_snapshot if @runtime_observers)]
end

#push(token, value = nil, location = nil) ⇒ :need_more, ...

Supply one token to a caller-driven parser session. Returns :need_more after consuming it, [:accepted, result] after acceptance, or [:rejected, result] after recovery terminates. rubocop:disable Layout/LineLength rubocop:enable Layout/LineLength

RBS:

  • (untyped token, ?untyped value, ?untyped location) -> (:need_more | [:accepted, untyped] | [:rejected, untyped])

Parameters:

  • token (Object)
  • value (Object) (defaults to: nil)
  • location (Object) (defaults to: nil)

Returns:

  • (:need_more, [ :accepted, untyped ], [ :rejected, untyped ]) 


440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
 
# File 'lib/ibex/runtime/parser.rb', line 440

def push(token, value = nil, location = nil)
  raise ParseError, "(input):1:1: push requires a token; call finish for EOF" if token.nil? || token == false

  run_push_driver do
    start_push_session
    refresh_runtime_fast_path_after_user_code!
    if @repair_policy
      enqueue_or_assign_repair_input(repair_input(token, value, location))
    else
      @lookahead = internal_token_id(token)
      @lookahead_value = value
      @lookahead_location = location
      @runtime_fast_path = false unless nil.equal?(location)
      materialize_compatible_lookahead
    end
    run_push_lookahead
  end
end

#push_location(location) ⇒ void

This method returns an undefined value.

Keep allocation out of the ordinary two-element lexer path. If a location first appears after values have already shifted, backfill the parallel prefix with nil exactly once.

RBS:

  • (untyped location) -> void

Parameters:

  • location (Object) 


2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
 
# File 'lib/ibex/runtime/parser.rb', line 2974

def push_location(location)
  stack = @location_stack
  if stack
    stack << location
  elsif location
    new_stack = Array.new(@value_stack.length)
    new_stack << location
    @location_stack = new_stack
  end
end

#push_reduction_result(next_state, result, location) ⇒ void

This method returns an undefined value.

RBS:

  • (Integer next_state, untyped result, untyped location) -> void

Parameters:

  • next_state (Integer)
  • result (Object)
  • location (Object) 


1626
1627
1628
1629
1630
 
# File 'lib/ibex/runtime/parser.rb', line 1626

def push_reduction_result(next_state, result, location)
  @state_stack << next_state
  push_location(location)
  @value_stack << result
end

#push_reusable_green_subtree(subtree) ⇒ void

This method returns an undefined value.

RBS:

  • (CST::ReusableSubtree subtree) -> void

Parameters:



2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
 
# File 'lib/ibex/runtime/parser.rb', line 2135

def push_reusable_green_subtree(subtree)
  unless @syntax_only && @state_stack.last == subtree.left_state
    raise ParseError, "(incremental):1:1: reusable subtree state mismatch"
  end

  builder = @green_builder || raise(ParseError, "(incremental):1:1: Green builder is unavailable")
  builder.append_trailing_to_last_token(subtree.previous_trailing) unless @green_reused_right_edge
  next_state = table_lookup(parser_tables.fetch(:gotos), @state_stack.last, subtree.lhs)
  raise ParseError, "(incremental):1:1: reusable subtree has no goto" unless next_state

  ensure_stack_capacity!
  @state_stack << next_state
  push_location(nil)
  @value_stack << nil
  builder.subtree(subtree.green)
  @green_memo_stack << CST::ParseMemo::Entry.new(nil, segment: subtree.left_states)
  @green_reused_right_edge = true
  @incremental_reused_descendants += subtree.green.descendant_count
end

#read_compatible_lookahead ⇒ void

This method returns an undefined value.

RBS:

  • () -> void



2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
 
# File 'lib/ibex/runtime/parser.rb', line 2626

def read_compatible_lookahead
  token = read_external_token
  refresh_runtime_fast_path_after_user_code!
  if token.is_a?(CST::ReusableSubtree)
    push_reusable_green_subtree(token)
    return
  end

  if token.nil? || token == false
    @lookahead = EOF_TOKEN
    @lookahead_value = nil
    @lookahead_location = nil
  else
    external_token, @lookahead_value, @lookahead_location = token
    @lookahead = if external_token.nil? || external_token == false
                   EOF_TOKEN
                 else
                   internal_token_id(external_token)
                 end
  end
  @runtime_fast_path = false unless nil.equal?(@lookahead_location)
  materialize_compatible_lookahead
end

#read_external_token ⇒ Object

RBS:

  • () -> untyped

Returns:

  • (Object) 


2727
2728
2729
2730
2731
2732
2733
2734
2735
 
# File 'lib/ibex/runtime/parser.rb', line 2727

def read_external_token
  source = @source
  return next_token unless source
  return source.next_for_state(@state_stack.last) if source.respond_to?(:next_for_state)

  source.call
rescue StopIteration
  false
end

#read_lookahead ⇒ void

This method returns an undefined value.

RBS:

  • () -> void



2608
2609
2610
2611
2612
 
# File 'lib/ibex/runtime/parser.rb', line 2608

def read_lookahead
  return read_repair_lookahead if @repair_policy

  read_compatible_lookahead
end

#read_repair_lookahead ⇒ void

This method returns an undefined value.

RBS:

  • () -> void



2615
2616
2617
2618
2619
2620
2621
2622
2623
 
# File 'lib/ibex/runtime/parser.rb', line 2615

def read_repair_lookahead
  buffer = @repair_input_buffer
  input = if buffer&.any?
            buffer.shift
          else
            repair_input_from_external(read_external_token)
          end
  assign_repair_input(input)
end

#recover(report: true) ⇒ Object

RBS:

  • (?report: bool) -> untyped

Parameters:

  • report: (Boolean) (defaults to: true)

Returns:

  • (Object) 


2181
2182
2183
2184
2185
2186
2187
2188
 
# File 'lib/ibex/runtime/parser.rb', line 2181

def recover(report: true)
  @runtime_fast_path = false
  materialize_lookahead_token_display! unless @lookahead.equal?(NO_LOOKAHEAD)
  @semantic_error = false
  return continue_recovery if @recovery_shifts.positive?

  begin_recovery(report)
end

#recovery_context(report) ⇒ Hash[Symbol, untyped]

RBS:

  • (bool report) -> Hash[Symbol, untyped]

Parameters:

  • report (Boolean)

Returns:

  • (Hash[Symbol, untyped]) 


2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
 
# File 'lib/ibex/runtime/parser.rb', line 2244

def recovery_context(report)
  {
    token_id: @lookahead,
    value: @lookahead_value,
    token_display: @runtime_lookahead_token_display,
    location: @lookahead_location,
    value_stack: @value_stack.dup,
    state: @state_stack.last,
    reason: report ? "syntax" : "semantic"
  }
end

#reduce(production_id, prefetched_production = nil) ⇒ Object

RBS:

  • (Integer production_id, ?Hash[Symbol, untyped]? prefetched_production) -> untyped

Parameters:

  • production_id (Integer)
  • prefetched_production (Hash[Symbol, untyped], nil) (defaults to: nil)

Returns:

  • (Object) 


1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
 
# File 'lib/ibex/runtime/parser.rb', line 1581

def reduce(production_id, prefetched_production = nil) # rubocop:disable Metrics -- allocation-free hot path.
  production = prefetched_production || parser_tables.fetch(:productions).fetch(production_id)
  length = production.fetch(:length)
  event_observers = runtime_observer_snapshot if @runtime_observers
  pre_state = @state_stack.last if event_observers
  values = @value_stack.last(length)
  locations = pop_reduction_locations(length)
  hook_values = values.dup
  # Array#last above preserves the native negative-length exception before either stack mutates.
  if length.is_a?(Integer) && !length.negative? &&
     length <= @value_stack.length && length < @state_stack.length
    remaining = length
    while remaining.positive?
      @state_stack.pop
      @value_stack.pop
      remaining -= 1
    end
  else
    @state_stack.pop(length)
    @value_stack.pop(length)
  end
  post_state = @state_stack.last if event_observers
  location = LocationSpan.for_reduction(locations, lookahead: @lookahead_location)
  result = reduction_value(production_id, production, values, locations, location)
  refresh_runtime_fast_path_after_user_code!
  reduce_green(production_id, production, length, @state_stack.last)
  next_state = table_lookup(parser_tables.fetch(:gotos), @state_stack.last, production.fetch(:lhs))
  raise ParseError, "(tables):1:1: missing goto for production #{production_id}" if next_state.nil?

  ensure_stack_capacity!
  push_reduction_result(next_state, result, location)
  trace_reduction(production_id, length, production.fetch(:lhs), result, next_state)
  event_data = build_reduce_event_data(
    event_observers, production_id, production, length, pre_state, post_state, next_state, result, location
  )
  on_reduce(production_id, hook_values, result)
  on_reduce_location(production_id, hook_values, result, locations.dup, location)
  emit_runtime_event(:reduce, event_data, observers: event_observers) if event_data
  return accept_reduction(result) if @accept_requested
  return recover(report: false) if @semantic_error

  CONTINUE_OUTCOME
end

#reduce_green(production_id, production, length, left_state) ⇒ void

This method returns an undefined value.

RBS:

  • (Integer production_id, Hash[Symbol, untyped] production, Integer length, Integer left_state) -> void

Parameters:

  • production_id (Integer)
  • production (Hash[Symbol, untyped])
  • length (Integer)
  • left_state (Integer) 


1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
 
# File 'lib/ibex/runtime/parser.rb', line 1922

def reduce_green(production_id, production, length, left_state)
  builder = @green_builder
  return unless builder

  config = parser_tables.fetch(:cst)
  slot = config.fetch(:slots).fetch(production_id, nil)
  kind = slot ? slot.fetch(:node_kind) : production.fetch(:lhs)
  flags = length.zero? ? CST::Flags::SYNTHETIC : 0
  builder.node(kind, length, flags: flags)
  entry = if length.zero?
            CST::ParseMemo::Entry.new(left_state)
          else
            CST::ParseMemo::Entry.new(left_state, children: @green_memo_stack.pop(length).freeze)
          end
  @green_memo_stack << entry
end

#reduction_value(production_id, production, values, locations, location) ⇒ Object

RBS:

  • (Integer production_id, Hash[Symbol, untyped] production, Array[untyped] values, Array[untyped] locations, LocationSpan? location) -> untyped

Parameters:

  • production_id (Integer)
  • production (Hash[Symbol, untyped])
  • values (Array[untyped])
  • locations (Array[untyped])
  • location (LocationSpan, nil)

Returns:

  • (Object) 


1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
 
# File 'lib/ibex/runtime/parser.rb', line 1677

def reduction_value(production_id, production, values, locations, location) # rubocop:disable Metrics -- explicit hot path.
  previous_locations = @semantic_locations
  previous_names = @semantic_location_names
  previous_result_location = @semantic_result_location
  return values.first if @syntax_only

  action = production[:action]
  return actionless_reduction_value(production_id, production, values, locations, location) unless action

  context_length = production.fetch(:location_context_length, 0)
  action_locations = if context_length.positive?
                       (@location_stack || []).last(context_length)
                     else
                       locations
                     end
  @semantic_locations = action_locations
  @semantic_location_names = production.fetch(:location_names, EMPTY_LOCATION_NAMES)
  @semantic_result_location = location
  return __send__(action, *values) if generated_positional_action?(production, action)
  return __send__(action, values) if generated_values_action?(production, action)

  value_stack = @value_stack.dup
  callable = action.respond_to?(:call)
  if generated_location_action?(production, action)
    location_stack = (@location_stack || []).dup
    if generated_composition_action?(production, action)
      if callable
        return instance_exec(
          values, value_stack, locations, location_stack, location, @lookahead_location, &action
        )
      end

      return __send__(action, values, value_stack, locations, location_stack, location, @lookahead_location)
    end

    return instance_exec(values, value_stack, locations, location_stack, location, &action) if callable

    return __send__(action, values, value_stack, locations, location_stack, location)
  end

  callable ? instance_exec(values, value_stack, &action) : __send__(action, values, value_stack)
ensure
  @semantic_locations = previous_locations
  @semantic_location_names = previous_names
  @semantic_result_location = previous_result_location
end

#refresh_runtime_fast_path_after_user_code! ⇒ void

This method returns an undefined value.

Re-check after lexer and semantic-action callbacks because those are supported points at which an application can install instrumentation. A disabled fast path never becomes active again within the session.

RBS:

  • () -> void



2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
 
# File 'lib/ibex/runtime/parser.rb', line 2958

def refresh_runtime_fast_path_after_user_code!
  return unless @runtime_fast_path

  @runtime_fast_path = false unless
    !@yydebug &&
    @runtime_observers.nil? &&
    @repair_policy.nil? &&
    @location_stack.nil? &&
    @semantic_error == false &&
    @accept_requested == false
end

#reject_recovery_eof ⇒ [ :done, nil ]

RBS:

  • () -> [:done, nil]

Returns:

  • ([ :done, nil ]) 


2208
2209
2210
2211
2212
2213
2214
2215
 
# File 'lib/ibex/runtime/parser.rb', line 2208

def reject_recovery_eof
  if @runtime_observers
    observers = runtime_observer_snapshot
    data = runtime_current_token_data
    emit_reject_event("eof_during_recovery", data, observers: observers)
  end
  [:done, cst_enabled? ? failed_cst : nil]
end

#reject_without_recovery(token_id, token_display, value, location, original_state, token_data, observers) ⇒ [ :done, nil ]

RBS:

  • (untyped token_id, untyped token_display, untyped value, untyped location, Integer original_state, Hash[String, untyped]? token_data, Array[Proc]? observers) -> [:done, nil]

Parameters:

  • token_id (Object)
  • token_display (Object)
  • value (Object)
  • location (Object)
  • original_state (Integer)
  • token_data (Hash[String, untyped], nil)
  • observers (Array[Proc], nil)

Returns:

  • ([ :done, nil ]) 


2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
 
# File 'lib/ibex/runtime/parser.rb', line 2334

def reject_without_recovery(token_id, token_display, value, location, original_state, token_data, observers)
  if observers
    reject_data = token_data || runtime_original_token_data(
      token_id, token_display, value, location, original_state
    )
    emit_reject_event(
      "no_recovery_state",
      reject_data.merge("state" => @state_stack.last),
      observers: observers
    )
  end
  [:done, cst_enabled? ? failed_cst : nil]
end

#release_driver ⇒ void

This method returns an undefined value.

RBS:

  • () -> void



1208
1209
1210
1211
1212
1213
 
# File 'lib/ibex/runtime/parser.rb', line 1208

def release_driver
  @runtime_observation_mutex.synchronize do
    @driver_status = :idle
    @runtime_driver_thread = nil
  end
end

#repair_input(external_token, value, location) ⇒ RepairInput

RBS:

  • (untyped external_token, untyped value, untyped location) -> RepairInput

Parameters:

  • external_token (Object)
  • value (Object)
  • location (Object)

Returns:



2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
 
# File 'lib/ibex/runtime/parser.rb', line 2669

def repair_input(external_token, value, location)
  token_id = parser_tables.fetch(:tokens)[external_token]
  if token_id
    return RepairInput.new(
      token_id: token_id, token_name: token_to_str(token_id), value: value, location: location
    )
  end

  RepairInput.new(
    token_id: -external_token.object_id.abs,
    token_name: external_token.inspect,
    value: value,
    location: location
  )
end

#repair_input_from_external(token) ⇒ RepairInput

RBS:

  • (untyped token) -> RepairInput

Parameters:

  • token (Object)

Returns:



2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
 
# File 'lib/ibex/runtime/parser.rb', line 2686

def repair_input_from_external(token)
  if token.nil? || token == false
    return RepairInput.new(token_id: EOF_TOKEN, token_name: token_to_str(EOF_TOKEN), value: nil, location: nil)
  end

  external_token, value, location = token
  if external_token.nil? || external_token == false
    return RepairInput.new(
      token_id: EOF_TOKEN,
      token_name: token_to_str(EOF_TOKEN),
      value: nil,
      location: location
    )
  end
  repair_input(external_token, value, location)
end

#repair_policy ⇒ RepairPolicy?

RBS:

  • () -> RepairPolicy?

Returns:



360
361
362
363
 
# File 'lib/ibex/runtime/parser.rb', line 360

def repair_policy
  ensure_runtime_initialized!
  @repair_policy
end

#repair_policy=(policy) ⇒ RepairPolicy?

Enable bounded automatic repair for the next parser session. Assign nil to restore the compatible yacc-only behavior.

RBS:

  • (RepairPolicy? policy) -> RepairPolicy?

Parameters:

Returns:



374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
 
# File 'lib/ibex/runtime/parser.rb', line 374

def repair_policy=(policy)
  ensure_runtime_initialized!
  unless policy.nil? || policy.is_a?(RepairPolicy)
    raise ArgumentError, "repair_policy must be an Ibex::Runtime::RepairPolicy or nil"
  end

  @runtime_observation_mutex.synchronize do
    ensure_driver_available_without_lock!
    if @push_status == :active
      raise ParseError, "(repair):1:1: repair_policy cannot change during an active push session"
    end

    @repair_policy = policy
  end
end

#repair_search_tokens(policy) ⇒ [ Array[RepairInput], bool ]

RBS:

  • (RepairPolicy policy) -> [Array[RepairInput], bool]

Parameters:

Returns:



2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
 
# File 'lib/ibex/runtime/parser.rb', line 2487

def repair_search_tokens(policy)
  current = RepairInput.new(
    token_id: @lookahead,
    token_name: @runtime_lookahead_token_display || token_to_str(@lookahead),
    value: @lookahead_value,
    location: @lookahead_location
  )
  buffer = @repair_input_buffer || raise(ParseError, "(repair):1:1: repair input buffer is unavailable")
  while @driver_status == :pull && buffer.length + 1 < policy.max_lookahead &&
        !buffer.last&.eof?
    buffer << repair_input_from_external(read_external_token)
  end
  tokens = ([current] + buffer).take(policy.max_lookahead)
  complete = tokens.any?(&:eof?) || tokens.length >= policy.max_lookahead
  [tokens.freeze, complete]
end

#repair_trace(plan) ⇒ String

RBS:

  • (RepairPlan plan) -> String

Parameters:

Returns:

  • (String) 


2603
2604
2605
 
# File 'lib/ibex/runtime/parser.rb', line 2603

def repair_trace(plan)
  plan.edits.map { |edit| "#{edit.kind}(#{edit.token_name}@#{edit.position})" }.join(", ")
end

#replay_repair_edits(source, edits) ⇒ Array[RepairInput]

RBS:

  • (Array[RepairInput] source, Array[RepairEdit] edits) -> Array[RepairInput]

Parameters:

Returns:



2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
 
# File 'lib/ibex/runtime/parser.rb', line 2524

def replay_repair_edits(source, edits)
  by_position = edits.group_by(&:position)
  repaired = [] #: Array[RepairInput]
  source.each_with_index do |input, position|
    consumed = append_repair_edits(repaired, input, by_position.fetch(position, []))
    repaired << input unless consumed
  end
  by_position.fetch(source.length, []).each do |edit|
    repaired << synthetic_repair_input(edit, value: nil, location: @lookahead_location)
  end
  repaired
end

#reset_cst_results(tables) ⇒ void

This method returns an undefined value.

RBS:

  • (Hash[Symbol, untyped] tables) -> void

Parameters:

  • tables (Hash[Symbol, untyped]) 


1857
1858
1859
 
# File 'lib/ibex/runtime/parser.rb', line 1857

def reset_cst_results(tables)
  prepare_green_cst(tables)
end

#reset_parse_recovery_state ⇒ void

This method returns an undefined value.

RBS:

  • () -> void



1265
1266
1267
1268
1269
1270
1271
 
# File 'lib/ibex/runtime/parser.rb', line 1265

def reset_parse_recovery_state
  @recovery_shifts = 0
  @semantic_error = false
  @repair_input_buffer = @repair_policy ? [] : nil
  @repair_selected = false
  clear_sync_recovery
end

#reset_push ⇒ nil

Discard a caller-driven session so this parser can accept a new one.

RBS:

  • () -> nil

Returns:

  • (nil) 


485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
 
# File 'lib/ibex/runtime/parser.rb', line 485

def reset_push
  ensure_runtime_initialized!
  @runtime_observation_mutex.synchronize do
    ensure_driver_available_without_lock!
    @push_status = :idle
    @source = nil
    @state_stack = []
    install_value_stack([])
    @location_stack = nil
    @lookahead = NO_LOOKAHEAD
    @lookahead_value = nil
    @lookahead_location = nil
    @runtime_lookahead_token_display = nil
    @repair_input_buffer = nil
    @repair_selected = false
    @runtime_parser_tables = nil
    @runtime_fast_path = false
  end
  nil
end

#resolve_initial_state(tables, requested) ⇒ Integer

RBS:

  • (Hash[Symbol, untyped] tables, Integer? requested) -> Integer

Parameters:

  • tables (Hash[Symbol, untyped])
  • requested (Integer, nil)

Returns:

  • (Integer) 


1274
1275
1276
1277
1278
1279
1280
 
# File 'lib/ibex/runtime/parser.rb', line 1274

def resolve_initial_state(tables, requested)
  initial_state = requested || tables[:initial_state] || 0
  return initial_state if initial_state.is_a?(Integer) &&
                          initial_state.between?(0, parser_state_count(tables) - 1)

  raise ParseError, "(tables):1:1: parser initial state #{initial_state.inspect} is invalid"
end

#resource_limits ⇒ ResourceLimits

RBS:

  • () -> ResourceLimits

Returns:



366
367
368
369
 
# File 'lib/ibex/runtime/parser.rb', line 366

def resource_limits
  ensure_runtime_initialized!
  @resource_limits
end

#resource_limits=(limits) ⇒ ResourceLimits

Replace the limits used by future sessions.

RBS:

  • (ResourceLimits limits) -> ResourceLimits

Parameters:

Returns:



392
393
394
395
396
397
398
399
400
401
402
403
404
 
# File 'lib/ibex/runtime/parser.rb', line 392

def resource_limits=(limits)
  ensure_runtime_initialized!
  validate_resource_limits!(limits)

  @runtime_observation_mutex.synchronize do
    ensure_driver_available_without_lock!
    if @push_status == :active
      raise ParseError, "(resource):1:1: resource_limits cannot change during an active push session"
    end

    @resource_limits = limits
  end
end

#result_loc ⇒ Object

Return the synthesized span of the reduction being evaluated.

RBS:

  • () -> untyped

Returns:

  • (Object) 


669
670
671
672
673
674
675
 
# File 'lib/ibex/runtime/parser.rb', line 669

def result_loc
  unless @semantic_locations
    raise ParseError, "(runtime):1:1: result_loc is only available inside a semantic action"
  end

  @semantic_result_location
end

#run_push_driver { ... } ⇒ Object

RBS:

  • () { () -> untyped } -> untyped

Yields:

Yield Returns:

  • (Object)

Returns:

  • (Object) 


1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
 
# File 'lib/ibex/runtime/parser.rb', line 1183

def run_push_driver
  ensure_runtime_initialized!
  @runtime_observation_mutex.synchronize do
    ensure_driver_available_without_lock!
    @driver_status = :push
    @runtime_driver_thread = Thread.current
  end
  begin
    yield
  rescue StandardError
    finish_push_session
    raise
  ensure
    release_driver
  end
end

#run_push_lookahead ⇒ :need_more, ...

RBS:

  • () -> (:need_more | [:accepted, untyped] | [:rejected, untyped])

Returns:

  • (:need_more, [ :accepted, untyped ], [ :rejected, untyped ]) 


1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
 
# File 'lib/ibex/runtime/parser.rb', line 1160

def run_push_lookahead
  loop do
    outcome = perform(action_for_current_state)
    return :need_more if outcome.first == :repair_pending

    case outcome.first
    when :accepted
      finish_push_session
      return [:accepted, outcome.fetch(1)]
    when :done
      finish_push_session
      return [:rejected, outcome.fetch(1)]
    end
    next unless @lookahead.equal?(NO_LOOKAHEAD)

    repair_buffer = @repair_input_buffer
    next if repair_buffer && !repair_buffer.empty?

    return :need_more
  end
end

#runtime_core_method(lookup, name) ⇒ Method?

Bypass an application-defined method helper while retaining Ruby's complete singleton/prepend/subclass lookup semantics.

RBS:

  • (UnboundMethod lookup, Symbol name) -> Method?

Parameters:

  • lookup (UnboundMethod)
  • name (Symbol)

Returns:

  • (Method, nil) 


2948
2949
2950
2951
2952
 
# File 'lib/ibex/runtime/parser.rb', line 2948

def runtime_core_method(lookup, name)
  lookup.bind_call(self, name)
rescue NameError
  nil
end

#runtime_current_token_data ⇒ Hash[String, untyped]

RBS:

  • () -> Hash[String, untyped]

Returns:

  • (Hash[String, untyped]) 


2398
2399
2400
2401
2402
2403
2404
2405
2406
 
# File 'lib/ibex/runtime/parser.rb', line 2398

def runtime_current_token_data
  runtime_token_data(
    token_id: @lookahead,
    token_display: @runtime_lookahead_token_display,
    value: @lookahead_value,
    location: @lookahead_location,
    state: @state_stack.last
  )
end

#runtime_discard_data(token_display) ⇒ Hash[String, untyped]

RBS:

  • (String token_display) -> Hash[String, untyped]

Parameters:

  • token_display (String)

Returns:

  • (Hash[String, untyped]) 


2218
2219
2220
2221
2222
2223
2224
2225
2226
 
# File 'lib/ibex/runtime/parser.rb', line 2218

def runtime_discard_data(token_display)
  runtime_token_data(
    token_id: @lookahead,
    token_display: token_display,
    value: @lookahead_value,
    location: @lookahead_location,
    state: @state_stack.last
  ).merge("reason" => "recovery").freeze
end

#runtime_fast_path_class_hooks_eligible? ⇒ Boolean

RBS:

  • () -> bool

Returns:

  • (Boolean) 


2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
 
# File 'lib/ibex/runtime/parser.rb', line 2904

def runtime_fast_path_class_hooks_eligible?
  install_runtime_fast_path_class_tracker!
  parser_class = self.class
  version = parser_class.instance_variable_get(:@__ibex_fast_path_hook_version) || 0
  cached = parser_class.instance_variable_get(:@__ibex_fast_path_hook_cache)
  return cached.fetch(1) if cached.is_a?(Array) && cached[0] == version

  eligible = FAST_PATH_HOOK_REFERENCES.all? do |name, reference|
    runtime_methods_equivalent?(
      parser_class.instance_method(name),
      Parser.instance_method(reference)
    )
  rescue NameError
    false
  end
  parser_class.instance_variable_set(:@__ibex_fast_path_hook_cache, [version, eligible].freeze)
  eligible
rescue FrozenError, TypeError
  false
end

#runtime_fast_path_eligible?(tables) ⇒ Boolean

The generic driver remains authoritative whenever a public runtime extension can observe a committed shift or reduction.

RBS:

  • (Hash[Symbol, untyped] tables) -> bool

Parameters:

  • tables (Hash[Symbol, untyped])

Returns:

  • (Boolean) 


2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
 
# File 'lib/ibex/runtime/parser.rb', line 2857

def runtime_fast_path_eligible?(tables)
  !@syntax_only &&
    !@yydebug &&
    @runtime_observers.nil? &&
    @repair_policy.nil? &&
    !tables[:cst] &&
    !tables.fetch(:uses_locations, false) &&
    @location_stack.nil? &&
    runtime_fast_path_hooks_eligible?
end

#runtime_fast_path_hooks_eligible? ⇒ Boolean

RBS:

  • () -> bool

Returns:

  • (Boolean) 


2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
 
# File 'lib/ibex/runtime/parser.rb', line 2869

def runtime_fast_path_hooks_eligible?
  cached = cached_runtime_fast_path_hooks_eligibility
  return cached unless cached.nil?

  lookup = Object.instance_method(:method)
  hooks_unchanged =
    runtime_method_unchanged?(lookup, :on_shift, :__ibex_fast_path_on_shift) &&
    runtime_method_unchanged?(lookup, :on_shift_location, :__ibex_fast_path_on_shift_location) &&
    runtime_method_unchanged?(lookup, :on_reduce, :__ibex_fast_path_on_reduce) &&
    runtime_method_unchanged?(lookup, :on_reduce_location, :__ibex_fast_path_on_reduce_location) &&
    runtime_method_unchanged?(lookup, :token_to_str, :__ibex_fast_path_token_to_str)
  return false unless hooks_unchanged
  return true unless @runtime_fast_path_tracker_installed

  tracker_effective = FastPathMutationTracker.effective_for?(self, lookup)
  if tracker_effective
    @runtime_fast_path_hooks_mutated = false
    singleton = Object.instance_method(:singleton_class).bind_call(self)
    @runtime_fast_path_singleton_ancestors = singleton.ancestors.freeze
  end
  tracker_effective
end

#runtime_method_unchanged?(lookup, name, reference) ⇒ Boolean

RBS:

  • (UnboundMethod lookup, Symbol name, Symbol reference) -> bool

Parameters:

  • lookup (UnboundMethod)
  • name (Symbol)
  • reference (Symbol)

Returns:

  • (Boolean) 


2926
2927
2928
2929
2930
2931
2932
 
# File 'lib/ibex/runtime/parser.rb', line 2926

def runtime_method_unchanged?(lookup, name, reference)
  implementation = runtime_core_method(lookup, name)
  expected = runtime_core_method(lookup, reference)
  return false if implementation.nil? || expected.nil?

  runtime_methods_equivalent?(implementation, expected)
end

#runtime_methods_equivalent?(implementation, expected) ⇒ Boolean

Ruby 3.0 and 3.1 do not preserve UnboundMethod#== for an inherited method and its alias even though both still identify the same body.

RBS:

  • (Method | UnboundMethod implementation, Method | UnboundMethod expected) -> bool

Parameters:

  • implementation (Method, UnboundMethod)
  • expected (Method, UnboundMethod)

Returns:

  • (Boolean) 


2937
2938
2939
2940
2941
2942
2943
 
# File 'lib/ibex/runtime/parser.rb', line 2937

def runtime_methods_equivalent?(implementation, expected)
  return true if implementation == expected

  implementation.owner.equal?(expected.owner) &&
    implementation.original_name == expected.original_name &&
    implementation.source_location == expected.source_location
end

#runtime_original_token_data(token_id, token_display, value, location, state) ⇒ Hash[String, untyped]

RBS:

  • (untyped token_id, untyped token_display, untyped value, untyped location, Integer state) -> Hash[String, untyped]

Parameters:

  • token_id (Object)
  • token_display (Object)
  • value (Object)
  • location (Object)
  • state (Integer)

Returns:

  • (Hash[String, untyped]) 


2321
2322
2323
2324
2325
2326
2327
2328
2329
 
# File 'lib/ibex/runtime/parser.rb', line 2321

def runtime_original_token_data(token_id, token_display, value, location, state)
  runtime_token_data(
    token_id: token_id,
    token_display: token_display,
    value: value,
    location: location,
    state: state
  )
end

#runtime_reduce_data(production_id, production, length, pre_state, post_state, next_state, result, location) ⇒ Hash[String, untyped]

RBS:

  • (Integer production_id, Hash[Symbol, untyped] production, Integer length, Integer? pre_state, Integer? post_state, Integer next_state, untyped result, LocationSpan? location) -> Hash[String, untyped]

Parameters:

  • production_id (Integer)
  • production (Hash[Symbol, untyped])
  • length (Integer)
  • pre_state (Integer, nil)
  • post_state (Integer, nil)
  • next_state (Integer)
  • result (Object)
  • location (LocationSpan, nil)

Returns:

  • (Hash[String, untyped]) 


1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
 
# File 'lib/ibex/runtime/parser.rb', line 1655

def runtime_reduce_data(production_id, production, length, pre_state, post_state, next_state, result, location)
  {
    "production_id" => production_id,
    "lhs" => production.fetch(:lhs),
    "rhs_length" => length,
    "pre_state" => pre_state,
    "post_state" => post_state,
    "goto_state" => next_state,
    "result" => EventSanitizer.value(result),
    "location" => EventSanitizer.location(location)
  }.freeze
end

#runtime_token_data(token_id:, token_display:, value:, location:, state:) ⇒ Hash[String, untyped]

RBS:

  • (token_id: untyped, token_display: untyped, value: untyped, location: untyped, state: Integer) -> Hash[String, untyped]

Parameters:

  • token_id: (Object)
  • token_display: (Object)
  • value: (Object)
  • location: (Object)
  • state: (Integer)

Returns:

  • (Hash[String, untyped]) 


2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
 
# File 'lib/ibex/runtime/parser.rb', line 2377

def runtime_token_data(token_id:, token_display:, value:, location:, state:)
  if token_id.equal?(NO_LOOKAHEAD)
    return {
      "state" => state,
      "token_id" => nil,
      "token" => nil,
      "value" => nil,
      "location" => nil
    }.freeze
  end

  {
    "state" => state,
    "token_id" => token_id,
    "token" => EventSanitizer.value(token_display),
    "value" => EventSanitizer.value(value),
    "location" => EventSanitizer.location(location)
  }.freeze
end

#selected_repair ⇒ RepairPlan, ...

RBS:

  • () -> (RepairPlan | Object | nil)

Returns:



2478
2479
2480
2481
2482
2483
2484
 
# File 'lib/ibex/runtime/parser.rb', line 2478

def selected_repair
  policy = @repair_policy
  return unless policy

  tokens, complete = repair_search_tokens(policy)
  RepairSearch.new(parser_tables, policy, tokens, complete: complete).search(@state_stack)
end

#shift(next_state) ⇒ Object

RBS:

  • (Integer next_state) -> untyped

Parameters:

  • next_state (Integer)

Returns:

  • (Object) 


1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
 
# File 'lib/ibex/runtime/parser.rb', line 1548

def shift(next_state)
  token_id = @lookahead
  value = @lookahead_value
  location = @lookahead_location
  from_state = @state_stack.last
  token_display = token_to_str(token_id)
  trace("shift #{token_display}#{trace_value_suffix(value, token_id)} -> state #{next_state}") if @yydebug
  event_observers = runtime_observer_snapshot if @runtime_observers
  event_data = if event_observers
                 runtime_token_data(
                   token_id: token_id,
                   token_display: token_display,
                   value: value,
                   location: location,
                   state: next_state
                 ).merge("from_state" => @state_stack.last).freeze
               end
  ensure_stack_capacity!
  @state_stack << next_state
  push_location(location)
  @value_stack << value
  shift_green_token(token_id, value, location, from_state)
  @lookahead = NO_LOOKAHEAD
  @lookahead_location = nil
  @runtime_lookahead_token_display = nil
  @recovery_shifts -= 1 if @recovery_shifts.positive?
  on_shift(token_id, value, next_state)
  on_shift_location(token_id, value, next_state, location)
  emit_runtime_event(:shift, event_data, observers: event_observers) if event_data
  CONTINUE_OUTCOME
end

#shift_error_token ⇒ Boolean

RBS:

  • () -> bool

Returns:

  • (Boolean) 


2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
 
# File 'lib/ibex/runtime/parser.rb', line 2426

def shift_error_token
  popped = 0
  @green_parse_memo_valid = false
  loop do
    action = table_lookup(parser_tables.fetch(:actions), @state_stack.last, ERROR_TOKEN)
    if action&.first == :shift
      trace("recover: shift error -> state #{action.fetch(1)}") if @yydebug
      ensure_stack_capacity!
      @state_stack << action.fetch(1)
      push_location(@lookahead_location)
      @value_stack << nil
      @green_builder&.absorb_into_error(popped)
      empty = [] #: Array[CST::ParseMemo::Entry]
      children = popped.zero? ? empty : @green_memo_stack.pop(popped)
      @green_memo_stack << CST::ParseMemo::Entry.new(@state_stack.last, children: children)
      return true
    end
    return false if @state_stack.length == 1

    trace("recover: pop state #{@state_stack.last}") if @yydebug
    @state_stack.pop
    @value_stack.pop
    @location_stack&.pop
    popped += 1
  end
end

#shift_green_token(token_id, value, location, from_state) ⇒ void

This method returns an undefined value.

rubocop:disable Metrics/PerceivedComplexity -- generated locations have a deliberate allocation-free path.

RBS:

  • (Integer token_id, untyped value, untyped location, Integer from_state) -> void

Parameters:

  • token_id (Integer)
  • value (Object)
  • location (Object)
  • from_state (Integer) 


1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
 
# File 'lib/ibex/runtime/parser.rb', line 1863

def shift_green_token(token_id, value, location, from_state)
  builder = @green_builder
  kinds = @green_kinds
  return unless builder && kinds

  if location.is_a?(Hash) && location.key?(:ibex_lexer_start_state)
    trailing = location[:cst_previous_trailing] || EMPTY_GREEN_TRIVIA
    location_leading = location[:leading_trivia] || EMPTY_GREEN_TRIVIA
    repair = location[:ibex_repair]
    token_text = location[:ibex_cst_text]
    token_text = value unless token_text.is_a?(String)
    token_text = "" unless token_text.is_a?(String)
    lexer_state = location[:ibex_lexer_start_state]
    lexer_state = lexer_state ? lexer_state.to_sym : :INITIAL
  else
    trailing = green_location_trivia(location, :cst_previous_trailing)
    location_leading = green_location_trivia(location, :leading_trivia)
    repair = cst_location_value(location, :ibex_repair)
    token_text = green_token_text(value, location)
    lexer_state = green_lexer_state(location)
  end

  commit_green_token_shift(
    builder, kinds, token_id, from_state, trailing, location_leading, repair, token_text, lexer_state
  )
end

#start_push_session ⇒ void

This method returns an undefined value.

RBS:

  • () -> void



1149
1150
1151
1152
1153
1154
1155
1156
1157
 
# File 'lib/ibex/runtime/parser.rb', line 1149

def start_push_session
  if @push_status == :finished
    raise ParseError, "(input):1:1: push session is finished; call reset_push before supplying more input"
  end
  return if @push_status == :active

  prepare_parse(-> { raise ParseError, "(input):1:1: push session needs another token" })
  @push_status = :active
end

#syntax_parse_result(value) ⇒ CST::ParseResult

RBS:

  • (untyped value) -> CST::ParseResult

Parameters:

  • value (Object)

Returns:



2069
2070
2071
2072
2073
2074
 
# File 'lib/ibex/runtime/parser.rb', line 2069

def syntax_parse_result(value)
  root = @syntax_root
  raise ParseError, "(cst):1:1: parse_with_syntax requires a format-v6 CST parser" unless root

  CST::ParseResult.new(value: value, syntax_root: root, diagnostics: @syntax_diagnostics)
end

#syntax_root ⇒ CST::SyntaxNode?

Return the Red source-file root built by the most recent CST parse.

RBS:

  • () -> CST::SyntaxNode?

Returns:



420
421
422
423
 
# File 'lib/ibex/runtime/parser.rb', line 420

def syntax_root
  ensure_runtime_initialized!
  @syntax_root
end

#syntax_token_states ⇒ Array[Symbol]

RBS:

  • () -> Array[Symbol]

Returns:

  • (Array[Symbol]) 


2077
2078
2079
 
# File 'lib/ibex/runtime/parser.rb', line 2077

def syntax_token_states
  @green_token_states.dup.freeze
end

#synthetic_repair_input(edit, value:, location:) ⇒ RepairInput

RBS:

  • (RepairEdit edit, value: untyped, location: untyped) -> RepairInput

Parameters:

  • edit (RepairEdit)
  • value: (Object)
  • location: (Object)

Returns:



2582
2583
2584
2585
 
# File 'lib/ibex/runtime/parser.rb', line 2582

def synthetic_repair_input(edit, value:, location:)
  location = cst_repair_location(location, edit.kind) if cst_enabled?
  RepairInput.new(token_id: edit.token_id, token_name: edit.token_name, value: value, location: location)
end

#table_lookup(table, row, column) ⇒ Object

RBS:

  • (untyped table, Integer row, Integer column) -> untyped

Parameters:

  • table (Object)
  • row (Integer)
  • column (Integer)

Returns:

  • (Object) 


2996
2997
2998
2999
3000
 
# File 'lib/ibex/runtime/parser.rb', line 2996

def table_lookup(table, row, column)
  return table.lookup(row, column) if table.respond_to?(:lookup)

  table.fetch(row, EMPTY_ROW)[column]
end

#token_suggestions(actual, expected) ⇒ Array[String]

RBS:

  • (String actual, Array[String] expected) -> Array[String]

Parameters:

  • actual (String)
  • expected (Array[String])

Returns:

  • (Array[String]) 


2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
 
# File 'lib/ibex/runtime/parser.rb', line 2776

def token_suggestions(actual, expected)
  word = normalized_token_word(actual)
  return [] unless word

  threshold = word.length < 5 ? 1 : 2
  expected.filter_map do |candidate|
    candidate_word = normalized_token_word(candidate)
    candidate if candidate_word && edit_distance(word, candidate_word) <= threshold
  end
end

#token_to_str(token_id) ⇒ String Also known as: __ibex_fast_path_token_to_str

Return a human-readable name for an internal token id.

RBS:

  • (Integer token_id) -> String

Parameters:

  • token_id (Integer)

Returns:

  • (String) 


590
591
592
593
594
 
# File 'lib/ibex/runtime/parser.rb', line 590

def token_to_str(token_id)
  return @unknown_token_name || token_id.to_s if token_id == @unknown_token_id

  parser_tables.fetch(:token_names).fetch(token_id, token_id.to_s)
end

#trace(message) ⇒ void

This method returns an undefined value.

RBS:

  • (String message) -> void

Parameters:

  • message (String) 


3003
3004
3005
 
# File 'lib/ibex/runtime/parser.rb', line 3003

def trace(message)
  @yydebug_output.puts("ibex: #{message}") if @yydebug
end

#trace_reduction(production_id, length, lhs, result, next_state) ⇒ void

This method returns an undefined value.

RBS:

  • (Integer production_id, Integer length, Integer lhs, untyped result, Integer next_state) -> void

Parameters:

  • production_id (Integer)
  • length (Integer)
  • lhs (Integer)
  • result (Object)
  • next_state (Integer) 


1633
1634
1635
1636
1637
 
# File 'lib/ibex/runtime/parser.rb', line 1633

def trace_reduction(production_id, length, lhs, result, next_state)
  return unless @yydebug

  trace("reduce #{production_id} (#{length})#{trace_value_suffix(result, lhs)} -> state #{next_state}")
end

#trace_value_printer=(printer) ⇒ ^(untyped) -> untyped?

Install an opt-in value formatter for human-readable yydebug traces.

RBS:

  • ((^(untyped) -> untyped)? printer) -> (^(untyped) -> untyped)?

Parameters:

  • printer (^(untyped) -> untyped, nil)

Returns:

  • (^(untyped) -> untyped, nil) 


574
575
576
577
578
579
580
581
 
# File 'lib/ibex/runtime/parser.rb', line 574

def trace_value_printer=(printer)
  ensure_runtime_initialized!
  unless printer.nil? || printer.respond_to?(:call)
    raise ArgumentError, "trace value printer must respond to call or be nil"
  end

  @trace_value_printer = printer
end

#trace_value_suffix(value, symbol_id) ⇒ String

RBS:

  • (untyped value, Integer symbol_id) -> String

Parameters:

  • value (Object)
  • symbol_id (Integer)

Returns:

  • (String) 


3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
 
# File 'lib/ibex/runtime/parser.rb', line 3008

def trace_value_suffix(value, symbol_id)
  return "" unless @yydebug

  printer = @trace_value_printer
  rendered = if printer
               printer.call(value)
             else
               method_name = parser_tables.fetch(:value_printers, EMPTY_ROW)[symbol_id]
               return "" unless method_name

               __send__(method_name, value)
             end
  " value=#{rendered}"
rescue StandardError => e
  " value=<printer error: #{e.class}>"
end

#track_locations?(tables) ⇒ Boolean

RBS:

  • (Hash[Symbol, untyped] tables) -> bool

Parameters:

  • tables (Hash[Symbol, untyped])

Returns:

  • (Boolean) 


2816
2817
2818
 
# File 'lib/ibex/runtime/parser.rb', line 2816

def track_locations?(tables)
  tables.fetch(:uses_locations, false) || !@runtime_observers.nil?
end

#validate_composition_action_contract!(production, index, version) ⇒ void

This method returns an undefined value.

RBS:

  • (Hash[Symbol, untyped] production, Integer index, Integer version) -> void

Parameters:

  • production (Hash[Symbol, untyped])
  • index (Integer)
  • version (Integer) 


1366
1367
1368
1369
1370
1371
1372
1373
 
# File 'lib/ibex/runtime/parser.rb', line 1366

def validate_composition_action_contract!(production, index, version)
  return unless production[:composition_action] == true
  return if production[:location_action] == true && generated_action_symbol?(production[:action])

  raise ParseError,
        "(tables):1:1: parser table format version #{version} production #{index} has an inconsistent " \
        ":composition_action marker; a generated action Symbol with :location_action is required"
end

#validate_current_cst_tables!(tables, actual) ⇒ void

This method returns an undefined value.

RBS:

  • (Hash[Symbol, untyped] tables, Integer actual) -> void

Parameters:

  • tables (Hash[Symbol, untyped])
  • actual (Integer) 


1308
1309
1310
1311
1312
1313
1314
1315
1316
 
# File 'lib/ibex/runtime/parser.rb', line 1308

def validate_current_cst_tables!(tables, actual)
  cst = tables[:cst]
  return if cst.nil? || cst == false
  return if actual == PARSER_TABLE_FORMAT_VERSION && cst.is_a?(Hash)

  raise ParseError,
        "(tables):1:1: legacy CST parser tables are unsupported; " \
        "regenerate the parser with the installed Ibex version"
end

#validate_generated_action_contracts!(tables, version) ⇒ void

This method returns an undefined value.

RBS:

  • (Hash[Symbol, untyped] tables, Integer version) -> void

Parameters:

  • tables (Hash[Symbol, untyped])
  • version (Integer) 


1357
1358
1359
1360
1361
1362
1363
 
# File 'lib/ibex/runtime/parser.rb', line 1357

def validate_generated_action_contracts!(tables, version)
  tables.fetch(:productions).each_with_index do |production, index|
    validate_composition_action_contract!(production, index, version)
    validate_values_action_contract!(production, index, version)
    validate_positional_action_contract!(production, index, version)
  end
end

#validate_parser_table_format! ⇒ Hash[Symbol, untyped]

RBS:

  • () -> Hash[Symbol, untyped]

Returns:

  • (Hash[Symbol, untyped]) 


1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
 
# File 'lib/ibex/runtime/parser.rb', line 1283

def validate_parser_table_format!
  tables = parser_tables
  unless tables.key?(:format_version)
    raise ParseError,
          "(tables):1:1: parser tables for #{self.class} are missing :format_version; " \
          "regenerate the parser with the installed Ibex version"
  end

  actual = tables.fetch(:format_version)
  unless SUPPORTED_PARSER_TABLE_FORMAT_VERSIONS.include?(actual)
    raise ParseError,
          "(tables):1:1: unsupported parser table format version #{actual.inspect} for #{self.class}; " \
          "runtime supports #{SUPPORTED_PARSER_TABLE_FORMAT_VERSIONS.join(', ')}; " \
          "regenerate the parser with the installed Ibex version"
  end

  validate_current_cst_tables!(tables, actual)
  if actual >= 3 && !generated_action_contracts_validated?(tables)
    validate_generated_action_contracts!(tables, actual)
    cache_generated_action_contracts!(tables)
  end
  tables
end

#validate_positional_action_contract!(production, index, version) ⇒ void

This method returns an undefined value.

RBS:

  • (Hash[Symbol, untyped] production, Integer index, Integer version) -> void

Parameters:

  • production (Hash[Symbol, untyped])
  • index (Integer)
  • version (Integer) 


1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
 
# File 'lib/ibex/runtime/parser.rb', line 1396

def validate_positional_action_contract!(production, index, version)
  return if version < 5 || production[:positional_action] != true

  return if positional_action_contract?(production)

  raise ParseError,
        "(tables):1:1: parser table format version #{version} production #{index} has an inconsistent " \
        ":positional_action marker; a generated action Symbol with zero to four RHS values and no other " \
        "action ABI markers is required"
end

#validate_resource_limits!(resource_limits) ⇒ void

This method returns an undefined value.

RBS:

  • (ResourceLimits resource_limits) -> void

Parameters:



764
765
766
767
768
 
# File 'lib/ibex/runtime/parser.rb', line 764

def validate_resource_limits!(resource_limits)
  return if resource_limits.is_a?(ResourceLimits)

  raise ArgumentError, "resource_limits must be an Ibex::Runtime::ResourceLimits"
end

#validate_values_action_contract!(production, index, version) ⇒ void

This method returns an undefined value.

RBS:

  • (Hash[Symbol, untyped] production, Integer index, Integer version) -> void

Parameters:

  • production (Hash[Symbol, untyped])
  • index (Integer)
  • version (Integer) 


1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
 
# File 'lib/ibex/runtime/parser.rb', line 1376

def validate_values_action_contract!(production, index, version)
  borrowed = production[:borrowed_values_action] == true
  if borrowed && production[:values_action] != true
    raise ParseError,
          "(tables):1:1: parser table format version #{version} production #{index} has an inconsistent " \
          ":borrowed_values_action marker; :values_action is required"
  end
  return if version < 4 || production[:values_action] != true
  return if generated_action_symbol?(production[:action]) &&
            production[:location_action] != true &&
            production[:composition_action] != true &&
            production.fetch(:location_context_length, 0).zero?

  raise ParseError,
        "(tables):1:1: parser table format version #{version} production #{index} has an inconsistent " \
        ":values_action marker; a generated action Symbol without location, composition, or context " \
        "markers is required"
end

#values_reduction_value(production, action, values, locations, location) ⇒ Object

RBS:

  • (Hash[Symbol, untyped] production, Symbol action, Array[untyped] values, Array[untyped] locations, LocationSpan? location) -> untyped

Parameters:

  • production (Hash[Symbol, untyped])
  • action (Symbol)
  • values (Array[untyped])
  • locations (Array[untyped])
  • location (LocationSpan, nil)

Returns:

  • (Object) 


1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
 
# File 'lib/ibex/runtime/parser.rb', line 1726

def values_reduction_value(production, action, values, locations, location)
  previous_locations = @semantic_locations
  previous_names = @semantic_location_names
  previous_result_location = @semantic_result_location
  @semantic_locations = locations
  @semantic_location_names = production.fetch(:location_names, EMPTY_LOCATION_NAMES)
  @semantic_result_location = location
  __send__(action, values)
ensure
  @semantic_locations = previous_locations
  @semantic_location_names = previous_names
  @semantic_result_location = previous_result_location
end

#with_syntax_only(cache) { ... } ⇒ Object

RBS:

  • (CST::NodeCache cache) { () -> untyped } -> untyped

Parameters:

Yields:

Yield Returns:

  • (Object)

Returns:

  • (Object) 


2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
 
# File 'lib/ibex/runtime/parser.rb', line 2109

def with_syntax_only(cache)
  previous_mode = @syntax_only
  previous_cache = @green_cache_override
  @syntax_only = true
  @green_cache_override = cache
  @runtime_fast_path = false
  yield
ensure
  @syntax_only = previous_mode
  @green_cache_override = previous_cache
end

#yyaccept ⇒ nil

Accept immediately after the current semantic action completes.

RBS:

  • () -> nil

Returns:

  • (nil) 


613
614
615
616
617
 
# File 'lib/ibex/runtime/parser.rb', line 613

def yyaccept
  @runtime_fast_path = false
  @accept_requested = true
  nil
end

#yydebug ⇒ Boolean

RBS:

  • () -> bool

Returns:

  • (Boolean) 


341
342
343
344
 
# File 'lib/ibex/runtime/parser.rb', line 341

def yydebug
  ensure_runtime_initialized!
  @yydebug
end

#yydebug=(enabled) ⇒ Boolean

RBS:

  • (bool enabled) -> bool

Parameters:

  • enabled (Boolean)

Returns:

  • (Boolean) 


347
348
349
350
351
 
# File 'lib/ibex/runtime/parser.rb', line 347

def yydebug=(enabled)
  ensure_runtime_initialized!
  @runtime_fast_path = false
  @yydebug = enabled
end

#yydebug_output=(output) ⇒ IO

RBS:

  • (IO output) -> IO

Parameters:

  • output (IO)

Returns:

  • (IO) 


354
355
356
357
 
# File 'lib/ibex/runtime/parser.rb', line 354

def yydebug_output=(output)
  ensure_runtime_initialized!
  @yydebug_output = output
end

#yyerrok ⇒ nil

Leave error recovery immediately.

RBS:

  • () -> nil

Returns:

  • (nil) 


606
607
608
609
 
# File 'lib/ibex/runtime/parser.rb', line 606

def yyerrok
  @recovery_shifts = 0
  nil
end

#yyerror ⇒ nil

Enter error recovery from a semantic action without calling on_error.

RBS:

  • () -> nil

Returns:

  • (nil) 


598
599
600
601
602
 
# File 'lib/ibex/runtime/parser.rb', line 598

def yyerror
  @runtime_fast_path = false
  @semantic_error = true
  nil
end

#yyparse(receiver, method_id) ⇒ Object

Parse tokens yielded by receiver.method_id.

RBS:

  • (untyped receiver, Symbol method_id) -> untyped

Parameters:

  • receiver (Object)
  • method_id (Symbol)

Returns:

  • (Object) 


427
428
429
430
431
432
 
# File 'lib/ibex/runtime/parser.rb', line 427

def yyparse(receiver, method_id)
  stream = Enumerator.new do |tokens|
    receiver.__send__(method_id) { |token| tokens << token }
  end
  drive_parser(-> { stream.next })
end