Class: Antlr4::Runtime::ATN
- Inherits:
-
Object
- Object
- Antlr4::Runtime::ATN
- Defined in:
- lib/antlr4/runtime/atn.rb
Constant Summary collapse
- INVALID_ALT_NUMBER =
0
Instance Attribute Summary collapse
-
#_a ⇒ Object
Returns the value of attribute _a.
-
#decision_to_state ⇒ Object
Returns the value of attribute decision_to_state.
-
#grammar_type ⇒ Object
Returns the value of attribute grammar_type.
-
#max_token_type ⇒ Object
Returns the value of attribute max_token_type.
-
#mode_name_to_start_state ⇒ Object
Returns the value of attribute mode_name_to_start_state.
-
#mode_to_start_state ⇒ Object
Returns the value of attribute mode_to_start_state.
-
#rule_to_start_state ⇒ Object
Returns the value of attribute rule_to_start_state.
-
#rule_to_stop_state ⇒ Object
Returns the value of attribute rule_to_stop_state.
-
#rule_to_token_type ⇒ Object
Returns the value of attribute rule_to_token_type.
-
#states ⇒ Object
Returns the value of attribute states.
Instance Method Summary collapse
- #add_state(state) ⇒ Object
- #decision_state(decision) ⇒ Object
- #define_decision_state(s) ⇒ Object
- #expected_tokens(state_number, context) ⇒ Object
-
#initialize(grammar_type, max_token_type) ⇒ ATN
constructor
A new instance of ATN.
- #next_tokens(s) ⇒ Object
- #next_tokens_ctx(s, ctx) ⇒ Object
- #number_of_decisions ⇒ Object
- #remove_state(state) ⇒ Object
Constructor Details
#initialize(grammar_type, max_token_type) ⇒ ATN
Returns a new instance of ATN.
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# File 'lib/antlr4/runtime/atn.rb', line 20 def initialize(grammar_type, max_token_type) @states = [] @decision_to_state = [] @rule_to_start_state = [] @rule_to_stop_state = [] @mode_name_to_start_state = {} @grammar_type = grammar_type @max_token_type = max_token_type @rule_to_token_type = [] @_a = [] @mode_to_start_state = [] end |
Instance Attribute Details
#_a ⇒ Object
Returns the value of attribute _a.
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# File 'lib/antlr4/runtime/atn.rb', line 17 def _a @_a end |
#decision_to_state ⇒ Object
Returns the value of attribute decision_to_state.
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# File 'lib/antlr4/runtime/atn.rb', line 16 def decision_to_state @decision_to_state end |
#grammar_type ⇒ Object
Returns the value of attribute grammar_type.
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# File 'lib/antlr4/runtime/atn.rb', line 10 def grammar_type @grammar_type end |
#max_token_type ⇒ Object
Returns the value of attribute max_token_type.
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# File 'lib/antlr4/runtime/atn.rb', line 18 def max_token_type @max_token_type end |
#mode_name_to_start_state ⇒ Object
Returns the value of attribute mode_name_to_start_state.
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# File 'lib/antlr4/runtime/atn.rb', line 14 def mode_name_to_start_state @mode_name_to_start_state end |
#mode_to_start_state ⇒ Object
Returns the value of attribute mode_to_start_state.
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# File 'lib/antlr4/runtime/atn.rb', line 15 def mode_to_start_state @mode_to_start_state end |
#rule_to_start_state ⇒ Object
Returns the value of attribute rule_to_start_state.
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# File 'lib/antlr4/runtime/atn.rb', line 12 def rule_to_start_state @rule_to_start_state end |
#rule_to_stop_state ⇒ Object
Returns the value of attribute rule_to_stop_state.
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# File 'lib/antlr4/runtime/atn.rb', line 13 def rule_to_stop_state @rule_to_stop_state end |
#rule_to_token_type ⇒ Object
Returns the value of attribute rule_to_token_type.
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# File 'lib/antlr4/runtime/atn.rb', line 11 def rule_to_token_type @rule_to_token_type end |
#states ⇒ Object
Returns the value of attribute states.
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# File 'lib/antlr4/runtime/atn.rb', line 9 def states @states end |
Instance Method Details
#add_state(state) ⇒ Object
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# File 'lib/antlr4/runtime/atn.rb', line 45 def add_state(state) unless state.nil? state.atn = self state.state_number = @states.length end @states << state end |
#decision_state(decision) ⇒ Object
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# File 'lib/antlr4/runtime/atn.rb', line 63 def decision_state(decision) @decision_to_state[decision] unless @decision_to_state.empty? end |
#define_decision_state(s) ⇒ Object
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# File 'lib/antlr4/runtime/atn.rb', line 58 def define_decision_state(s) @decision_to_state << s s.decision = @decision_to_state.length - 1 end |
#expected_tokens(state_number, context) ⇒ Object
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# File 'lib/antlr4/runtime/atn.rb', line 71 def expected_tokens(state_number, context) if state_number < 0 || state_number >= @states.length raise IllegalArgumentException, 'Invalid state number.' end ctx = context s = @states[state_number] following = next_tokens(s) return following unless following.contains(Token::EPSILON) expected = IntervalSet.new expected.add_all(following) expected.remove(Token::EPSILON) while !ctx.nil? && ctx.invoking_state >= 0 && following.contains(Token::EPSILON) invoking_state = @states[ctx.invoking_state] rt = invoking_state.transition(0) following = next_tokens(rt.follow_state) expected.add_all(following) expected.remove(Token::EPSILON) ctx = ctx.parent end expected << Token::EOF if following.contains(Token::EPSILON) expected end |
#next_tokens(s) ⇒ Object
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# File 'lib/antlr4/runtime/atn.rb', line 37 def next_tokens(s) return s.next_token_within_rule unless s.next_token_within_rule.nil? s.next_token_within_rule = next_tokens_ctx(s, nil) s.next_token_within_rule.readonly(true) s.next_token_within_rule end |
#next_tokens_ctx(s, ctx) ⇒ Object
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# File 'lib/antlr4/runtime/atn.rb', line 33 def next_tokens_ctx(s, ctx) LL1Analyzer.new(self).look(s, nil, ctx) end |
#number_of_decisions ⇒ Object
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# File 'lib/antlr4/runtime/atn.rb', line 67 def number_of_decisions @decision_to_state.length end |
#remove_state(state) ⇒ Object
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# File 'lib/antlr4/runtime/atn.rb', line 54 def remove_state(state) @states[state.state_number] = nil end |