Exception: Antlr4::Runtime::FailedPredicateException

Inherits:
RecognitionException show all
Defined in:
lib/antlr4/runtime/failed_predicate_exception.rb

Instance Attribute Summary collapse

Attributes inherited from RecognitionException

#context, #input, #offending_state, #offending_token, #recognizer

Instance Method Summary collapse

Methods inherited from RecognitionException

#expected_tokens

Constructor Details

#initialize(recognizer, predicate = nil, message = nil) ⇒ FailedPredicateException

Returns a new instance of FailedPredicateException.



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# File 'lib/antlr4/runtime/failed_predicate_exception.rb', line 8

def initialize(recognizer, predicate = nil, message = nil)
  super(format_message(predicate, message))
  @recognizer = recognizer
  @input = recognizer.input_stream
  @context = recognizer._ctx

  s = recognizer._interp.atn.states.get(recognizer.getState)

  trans = s.transition(0)
  if trans.is_a? PredicateTransition
    @rule_index = trans.rule_index
    @predicate_index = trans.pred_index
  else
    @rule_index = 0
    @predicate_index = 0
  end

  @predicate = predicate
  @offending_token = recognizer.current_token
end

Instance Attribute Details

#predicate ⇒ Object (readonly)

Returns the value of attribute predicate.



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# File 'lib/antlr4/runtime/failed_predicate_exception.rb', line 4

def predicate
  @predicate
end

#predicate_index ⇒ Object (readonly)

Returns the value of attribute predicate_index.



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# File 'lib/antlr4/runtime/failed_predicate_exception.rb', line 5

def predicate_index
  @predicate_index
end

#rule_index ⇒ Object (readonly)

Returns the value of attribute rule_index.



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# File 'lib/antlr4/runtime/failed_predicate_exception.rb', line 6

def rule_index
  @rule_index
end

Instance Method Details

#format_message(predicate, message) ⇒ Object 



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# File 'lib/antlr4/runtime/failed_predicate_exception.rb', line 29

def format_message(predicate, message)
  message.nil? ? message : "failed predicate: {" + predicate + "}?"
end