Class: Antlr4::Runtime::ATNDeserializer
- Inherits:
-
Object
- Object
- Antlr4::Runtime::ATNDeserializer
- Defined in:
- lib/antlr4/runtime/atn_deserializer.rb
Defined Under Namespace
Classes: UnicodeDeserializer, UnicodeDeserializingMode
Constant Summary collapse
- SERIALIZED_VERSION =
3
- @@base_serialized_uuid =
UUID.from_string('33761B2D-78BB-4A43-8B0B-4F5BEE8AACF3')
- @@added_precedence_transitions =
UUID.from_string('1DA0C57D-6C06-438A-9B27-10BCB3CE0F61')
- @@added_lexer_actions =
UUID.from_string('AADB8D7E-AEEF-4415-AD2B-8204D6CF042E')
- @@added_unicode_smp =
UUID.from_string('59627784-3BE5-417A-B9EB-8131A7286089')
- @@supported_uuids =
[@@base_serialized_uuid, @@added_precedence_transitions, @@added_lexer_actions, @@added_unicode_smp]
- @@serialized_uuid =
@@added_unicode_smp
Class Attribute Summary collapse
-
.SERIALIZED_Uuid ⇒ Object
Returns the value of attribute SERIALIZED_Uuid.
-
.SERIALIZED_VERSION ⇒ Object
Returns the value of attribute SERIALIZED_VERSION.
Class Method Summary collapse
Instance Method Summary collapse
- #check_condition(condition, message = nil) ⇒ Object
- #deserialize(serialized_data) ⇒ Object
- #deserialize_sets(data, p, sets, unicode_deserializer) ⇒ Object
- #edge_factory(atn, type, _src, trg, arg1, arg2, arg3, sets) ⇒ Object
- #feature_supported?(feature, actual_uuid) ⇒ Boolean
-
#initialize(deserialization_options = nil) ⇒ ATNDeserializer
constructor
A new instance of ATNDeserializer.
- #lexer_action_factory(type, data1, data2) ⇒ Object
- #mark_precedence_decisions(atn) ⇒ Object
- #state_factory(type, rule_index) ⇒ Object
- #to_int32(data, offset) ⇒ Object
- #to_long(data, offset) ⇒ Object
- #to_uuid(data, offset) ⇒ Object
- #verify_atn(atn) ⇒ Object
Constructor Details
#initialize(deserialization_options = nil) ⇒ ATNDeserializer
Returns a new instance of ATNDeserializer.
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# File 'lib/antlr4/runtime/atn_deserializer.rb', line 47 def initialize( = nil) @deserialization_options = if .nil? ATNDeserializationOptions.instance else end end |
Class Attribute Details
.SERIALIZED_Uuid ⇒ Object
Returns the value of attribute SERIALIZED_Uuid.
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# File 'lib/antlr4/runtime/atn_deserializer.rb', line 13 def SERIALIZED_Uuid @SERIALIZED_Uuid end |
.SERIALIZED_VERSION ⇒ Object
Returns the value of attribute SERIALIZED_VERSION.
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# File 'lib/antlr4/runtime/atn_deserializer.rb', line 14 def SERIALIZED_VERSION @SERIALIZED_VERSION end |
Class Method Details
.unicode_deserializer(mode) ⇒ Object
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# File 'lib/antlr4/runtime/atn_deserializer.rb', line 39 def self.unicode_deserializer(mode) if mode == UnicodeDeserializingMode::UNICODE_BMP UnicodeDeserializer.new else UnicodeDeserializer.new end end |
Instance Method Details
#check_condition(condition, message = nil) ⇒ Object
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# File 'lib/antlr4/runtime/atn_deserializer.rb', line 577 def check_condition(condition, = nil) raise IllegalStateException, unless condition end |
#deserialize(serialized_data) ⇒ Object
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# File 'lib/antlr4/runtime/atn_deserializer.rb', line 62 def deserialize(serialized_data) data = serialized_data.codepoints i = 1 while i < data.length data[i] = data[i] - 2 i += 1 end p = 0 version = data[p] p += 1 if version != SERIALIZED_VERSION reason = sprintf format("Could not deserialize ATN with version %d (expected %d).\n", version, SERIALIZED_VERSION) raise UnsupportedOperationException, reason end uuid = to_uuid(data, p) p += 8 unless @@supported_uuids.include?(uuid) reason = sprintf format("Could not deserialize ATN with Uuid %s (expected %s or a legacy Uuid).\n", uuid, @@serialized_uuid) raise UnsupportedOperationException, reason end supports_precedence_predicates = feature_supported?(@@added_precedence_transitions, uuid) supports_lexer_actions = feature_supported?(@@added_lexer_actions, uuid) grammar_type = ATNType::VALUES[data[p]] p += 1 max_token_type = data[p] p += 1 atn = ATN.new(grammar_type, max_token_type) loop_back_state_numbers = [] end_state_numbers = [] n_states = data[p] p += 1 i = 0 while i < n_states s_type = data[p] p += 1 if s_type == ATNState::INVALID_TYPE atn.add_state(nil) i += 1 next end rule_index = data[p] p += 1 rule_index = -1 if rule_index == 0xFFFF s = state_factory(s_type, rule_index) if s_type == ATNState::LOOP_END loop_back_state_number = data[p] p += 1 pair = OpenStruct.new pair.a = s pair.b = loop_back_state_number loop_back_state_numbers << pair elsif s.is_a? BlockStartState end_state_number = data[p] p += 1 pair = OpenStruct.new pair.a = s pair.b = end_state_number end_state_numbers << pair end atn.add_state(s) i += 1 end i = 0 while i < loop_back_state_numbers.length pair = loop_back_state_numbers[i] pair.a.loopback_state = atn.states[pair.b] i += 1 end i = 0 while i < end_state_numbers.length pair = end_state_numbers[i] pair.a.end_state = atn.states[pair.b] i += 1 end num_non_greedy_states = data[p] p += 1 i = 0 while i < num_non_greedy_states state_number = data[p] p += 1 atn.states[state_number].non_greedy = true i += 1 end if supports_precedence_predicates num_precedence_states = data[p] p += 1 i = 0 while i < num_precedence_states state_number = data[p] p += 1 atn.states[state_number].is_left_recursive_rule = true i += 1 end end nrules = data[p] p += 1 atn.rule_to_token_type = [] if atn.grammar_type == ATNType::LEXER atn.rule_to_start_state = [] i = 0 while i < nrules s = data[p] p += 1 start_state = atn.states[s] atn.rule_to_start_state[i] = start_state if atn.grammar_type == ATNType::LEXER token_type = data[p] p += 1 token_type = Token::EOF if token_type == 0xFFFF atn.rule_to_token_type[i] = token_type unless feature_supported?(@@added_lexer_actions, uuid) @action_index_ignored = data[p] p += 1 end end i += 1 end atn.rule_to_stop_state = [] i = 0 while i < atn.states.length state = atn.states[i] unless state.is_a? RuleStopState i += 1 next end stop_state = state atn.rule_to_stop_state[state.rule_index] = stop_state atn.rule_to_start_state[state.rule_index].stop_state = stop_state i += 1 end n_modes = data[p] p += 1 i = 0 while i < n_modes s = data[p] p += 1 atn.mode_to_start_state << atn.states[s] i += 1 end sets = [] p = deserialize_sets(data, p, sets, ATNDeserializer.unicode_deserializer(UnicodeDeserializingMode::UNICODE_BMP)) if feature_supported?(@@added_unicode_smp, uuid) p = deserialize_sets(data, p, sets, ATNDeserializer.unicode_deserializer(UnicodeDeserializingMode::UNICODE_SMP)) end n_edges = data[p] p += 1 i = 0 while i < n_edges src = data[p] trg = data[p + 1] ttype = data[p + 2] arg1 = data[p + 3] arg2 = data[p + 4] arg3 = data[p + 5] trans = edge_factory(atn, ttype, src, trg, arg1, arg2, arg3, sets) src_state = atn.states[src] src_state.add_transition(trans) p += 6 i += 1 end k = 0 while k < atn.states.length state = atn.states[k] i = 0 while i < state.number_of_transitions t = state.transition(i) unless t.is_a? RuleTransition i += 1 next end rule_transition = t outermost_precedence_return = -1 if atn.rule_to_start_state[rule_transition.target.rule_index].is_left_recursive_rule if rule_transition.precedence == 0 outermost_precedence_return = rule_transition.target.rule_index end end return_transition = EpsilonTransition.new(rule_transition.follow_state, outermost_precedence_return) atn.rule_to_stop_state[rule_transition.target.rule_index].add_transition(return_transition) i += 1 end k += 1 end k = 0 while k < atn.states.length state = atn.states[k] if state.is_a? BlockStartState raise IllegalStateException if state.end_state.nil? raise IllegalStateException unless state.end_state.start_state.nil? state.end_state.start_state = state end if state.is_a? PlusLoopbackState loopback_state = state i = 0 while i < loopback_state.number_of_transitions target = loopback_state.transition(i).target if target.is_a? PlusBlockStartState target.loopback_state = loopback_state end i += 1 end elsif state.is_a? StarLoopbackState loopback_state = state i = 0 while i < loopback_state.number_of_transitions target = loopback_state.transition(i).target if target.is_a? StarLoopEntryState target.loopback_state = loopback_state end i += 1 end end k += 1 end n_decisions = data[p] p += 1 i = 1 while i <= n_decisions s = data[p] p += 1 dec_state = atn.states[s] atn.decision_to_state << dec_state dec_state.decision = i - 1 i += 1 end if atn.grammar_type == ATNType::LEXER if supports_lexer_actions atn._a = Array.new(data[p]) p += 1 i = 0 while i < atn._a.length action_type = data[p] p += 1 data1 = data[p] p += 1 data1 = -1 if data1 == 0xFFFF data2 = data[p] p += 1 data2 = -1 if data2 == 0xFFFF lexer_action = lexer_action_factory(action_type, data1, data2) atn._a[i] = lexer_action i += 1 end else legacy_lexer_actions = [] k = 0 while k < atn.states.length state = atn.states[k] i = 0 while i < state.number_of_transitions transition = state.transition(i) unless transition.is_a? ActionTransition i += 1 next end rule_index = transition.rule_index action_index = transition.action_index lexer_action = LexerCustomAction.new(rule_index, action_index) state.set_transition(i, ActionTransition.new(transition.target, rule_index, legacy_lexer_actions.length, false)) legacy_lexer_actions << lexer_action i += 1 end k += 1 end atn._a = legacy_lexer_actions end end mark_precedence_decisions(atn) verify_atn(atn) if @deserialization_options.verify_atn? if @deserialization_options.generate_rule_bypass_transitions? && atn.grammar_type == ATNType::PARSER atn.rule_to_token_type = [] i = 0 while i < atn.rule_to_start_state.length atn.rule_to_token_type[i] = atn.max_token_type + i + 1 i += 1 end i = 0 while i < atn.rule_to_start_state.length bypass_start = BasicBlockStartState.new bypass_start.rule_index = i atn.add_state(bypass_start) bypass_stop = BlockEndState.new bypass_stop.rule_index = i atn.add_state(bypass_stop) bypass_start.end_state = bypass_stop atn.define_decision_state(bypass_start) bypass_stop.start_state = bypass_start exclude_transition = nil if atn.rule_to_start_state[i].is_left_recursive_rule end_state = nil i = 0 while i < atn.states.length state = atn.states[i] if state.rule_index != i i += 1 next end unless state.is_a? StarLoopEntryState i += 1 next end maybe_loop_end_state = state.transition(state.number_of_transitions - 1).target unless maybe_loop_end_state.is_a? LoopEndState i += 1 next end if maybe_loop_end_state.epsilon_only_transitions && maybe_loop_end_state.transition(0).target.is_a?(RuleStopState) end_state = state break end i += 1 end if end_state.nil? raise UnsupportedOperationException, "Couldn't identify final state of the precedence rule prefix section." end exclude_transition = end_state.loopback_state.transition(0) else end_state = atn.rule_to_stop_state[i] end i = 0 while i < atn.states.length state = atn.states[i] j = 0 while j < state.transitions.length transition = state.transitions[j] if transition == exclude_transition j += 1 next end transition.target = bypass_stop if transition.target == end_state j += 1 end i += 1 end while atn.rule_to_start_state[i].number_of_transitions > 0 transition = atn.rule_to_start_state[i].remove_transition(atn.rule_to_start_state[i].number_of_transitions - 1) bypass_start.add_transition(transition) end atn.rule_to_start_state[i].add_transition(EpsilonTransition.new(bypass_start)) bypass_stop.add_transition(EpsilonTransition.new(end_state)) match_state = BasicState.new atn.add_state(match_state) match_state.add_transition(AtomTransition.new(bypass_stop, atn.rule_to_token_type[i])) bypass_start.add_transition(EpsilonTransition.new(match_state)) end verify_atn(atn) if @deserialization_options.verify_atn? end atn end |
#deserialize_sets(data, p, sets, unicode_deserializer) ⇒ Object
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# File 'lib/antlr4/runtime/atn_deserializer.rb', line 468 def deserialize_sets(data, p, sets, unicode_deserializer) n_sets = data[p] p += 1 i = 0 while i < n_sets n_intervals = data[p] p += 1 set = IntervalSet.new sets << set contains_eof = data[p] != 0 p += 1 set.add(-1) if contains_eof j = 0 while j < n_intervals a = unicode_deserializer.read_unicode(data, p) p += unicode_deserializer.size b = unicode_deserializer.read_unicode(data, p) p += unicode_deserializer.size set.add(a, b) j += 1 end i += 1 end p end |
#edge_factory(atn, type, _src, trg, arg1, arg2, arg3, sets) ⇒ Object
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# File 'lib/antlr4/runtime/atn_deserializer.rb', line 596 def edge_factory(atn, type, _src, trg, arg1, arg2, arg3, sets) target = atn.states[trg] case type when Transition::EPSILON return EpsilonTransition.new(target) when Transition::RANGE if arg3 != 0 return RangeTransition.new(target, Token::EOF, arg2) else return RangeTransition.new(target, arg1, arg2) end when Transition::RULE rt = RuleTransition.new(atn.states[arg1], arg2, arg3, target) return rt when Transition::PREDICATE pt = PredicateTransition.new(target, arg1, arg2, arg3 != 0) return pt when Transition::PRECEDENCE return PrecedencePredicateTransition.new(target, arg1) when Transition::ATOM if arg3 != 0 return AtomTransition.new(target, Token::EOF) else return AtomTransition.new(target, arg1) end when Transition::ACTION a = ActionTransition.new(target, arg1, arg2, arg3 != 0) return a when Transition::SET return SetTransition.new(target, sets[arg1]) when Transition::NOT_SET return NotSetTransition.new(target, sets[arg1]) when Transition::WILDCARD return WildcardTransition.new(target) else raise IllegalArgumentException, ' The specified transition type is not valid.' end end |
#feature_supported?(feature, actual_uuid) ⇒ Boolean
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# File 'lib/antlr4/runtime/atn_deserializer.rb', line 55 def feature_supported?(feature, actual_uuid) feature_index = @@supported_uuids.index(feature) return false if feature_index < 0 @@supported_uuids.index(actual_uuid) >= feature_index end |
#lexer_action_factory(type, data1, data2) ⇒ Object
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# File 'lib/antlr4/runtime/atn_deserializer.rb', line 671 def lexer_action_factory(type, data1, data2) case type when LexerActionType::CHANNEL LexerChannelAction.new(data1) when LexerActionType::CUSTOM LexerCustomAction.new(data1, data2) when LexerActionType::MODE LexerModeAction.new(data1) when LexerActionType::MORE LexerMoreAction.instance when LexerActionType::POP_MODE LexerPopModeAction.instance when LexerActionType::PUSH_MODE LexerPushModeAction.new(data1) when LexerActionType::SKIP LexerSkipAction.instance when LexerActionType::TYPE LexerTypeAction.new(data1) else = sprintf format(" The specified lexer action type % d is not valid.\n", type) raise IllegalArgumentException, end end |
#mark_precedence_decisions(atn) ⇒ Object
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# File 'lib/antlr4/runtime/atn_deserializer.rb', line 496 def mark_precedence_decisions(atn) i = 0 while i < atn.states.length state = atn.states[i] unless state.is_a? StarLoopEntryState i += 1 next end unless atn.rule_to_start_state[state.rule_index].is_left_recursive_rule i += 1 next end maybeLoopEndState = state.transition(state.number_of_transitions - 1).target unless maybeLoopEndState.is_a? LoopEndState i += 1 next end if maybeLoopEndState.epsilon_only_transitions && maybeLoopEndState.transition(0).target.is_a?(RuleStopState) state.is_precedence_pecision = true end i += 1 end end |
#state_factory(type, rule_index) ⇒ Object
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# File 'lib/antlr4/runtime/atn_deserializer.rb', line 635 def state_factory(type, rule_index) case type when ATNState::INVALID_TYPE return nil when ATNState::BASIC s = BasicState.new when ATNState::RULE_START s = RuleStartState.new when ATNState::BLOCK_START s = BasicBlockStartState.new when ATNState::PLUS_BLOCK_START s = PlusBlockStartState.new when ATNState::STAR_BLOCK_START s = StarBlockStartState.new when ATNState::TOKEN_START s = TokensStartState.new when ATNState::RULE_STOP s = RuleStopState.new when ATNState::BLOCK_END s = BlockEndState.new when ATNState::STAR_LOOP_BACK s = StarLoopbackState.new when ATNState::STAR_LOOP_ENTRY s = StarLoopEntryState.new when ATNState::PLUS_LOOP_BACK s = PlusLoopbackState.new when ATNState::LOOP_END s = LoopEndState.new else = sprintf format(" The specified state type % d is not valid.\n", type) raise IllegalArgumentException, end s.rule_index = rule_index s end |
#to_int32(data, offset) ⇒ Object
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# File 'lib/antlr4/runtime/atn_deserializer.rb', line 581 def to_int32(data, offset) data[offset] | (data[offset + 1] << 16) end |
#to_long(data, offset) ⇒ Object
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# File 'lib/antlr4/runtime/atn_deserializer.rb', line 585 def to_long(data, offset) low_order = to_int32(data, offset) & 0x00000000FFFFFFFF low_order | (to_int32(data, offset + 2) << 32) end |
#to_uuid(data, offset) ⇒ Object
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# File 'lib/antlr4/runtime/atn_deserializer.rb', line 590 def to_uuid(data, offset) least_sig_bits = to_long(data, offset) mostSigBits = to_long(data, offset + 4) UUID.new(mostSigBits, least_sig_bits) end |
#verify_atn(atn) ⇒ Object
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# File 'lib/antlr4/runtime/atn_deserializer.rb', line 523 def verify_atn(atn) i = 0 while i < atn.states.length state = atn.states[i] if state.nil? i += 1 next end check_condition(state.only_has_epsilon_transitions || state.number_of_transitions <= 1) if state.is_a? PlusBlockStartState check_condition(!state.loopback_state.nil?) end if state.is_a? StarLoopEntryState star_loop_entry_state = state check_condition(!star_loop_entry_state.loopback_state.nil?) check_condition(star_loop_entry_state.number_of_transitions == 2) if star_loop_entry_state.transition(0).target.is_a? StarBlockStartState check_condition(star_loop_entry_state.transition(1).target.is_a?(LoopEndState)) check_condition(!star_loop_entry_state.non_greedy) elsif star_loop_entry_state.transition(0).target.is_a? LoopEndState check_condition(star_loop_entry_state.transition(1).target.is_a?(StarBlockStartState)) check_condition(star_loop_entry_state.non_greedy) else raise IllegalStateException end end if state.is_a? StarLoopbackState check_condition(state.number_of_transitions == 1) check_condition(state.transition(0).target.is_a?(StarLoopEntryState)) end check_condition(!state.loopback_state.nil?) if state.is_a? LoopEndState check_condition(!state.stop_state.nil?) if state.is_a? RuleStartState check_condition(!state.end_state.nil?) if state.is_a? BlockStartState check_condition(!state.start_state.nil?) if state.is_a? BlockEndState if state.is_a? DecisionState decision_state = state check_condition(decision_state.number_of_transitions <= 1 || decision_state.decision >= 0) else check_condition(state.number_of_transitions <= 1 || state.is_a?(RuleStopState)) end i += 1 end end |