Class: Antlr4::Runtime::SemanticContext::PrecedencePredicate

Inherits:
Antlr4::Runtime::SemanticContext show all
Defined in:
lib/antlr4/runtime/semantic_context.rb

Constant Summary

Constants inherited from Antlr4::Runtime::SemanticContext

NONE

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Antlr4::Runtime::SemanticContext

and, filter_precedence_predicates, or

Constructor Details

#initialize(precedence = 0) ⇒ PrecedencePredicate

Returns a new instance of PrecedencePredicate.



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# File 'lib/antlr4/runtime/semantic_context.rb', line 57

def initialize(precedence = 0)
  @precedence = precedence
end

Instance Attribute Details

#precedence ⇒ Object

Returns the value of attribute precedence.



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# File 'lib/antlr4/runtime/semantic_context.rb', line 55

def precedence
  @precedence
end

Instance Method Details

#compare_to(o) ⇒ Object 



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# File 'lib/antlr4/runtime/semantic_context.rb', line 69

def compare_to(o)
  @precedence - o.precedence
end

#eql?(other) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/antlr4/runtime/semantic_context.rb', line 78

def eql?(other)
  return false unless other.is_a? PrecedencePredicate

  return true if self == other

  @precedence == other.precedence
end

#eval(parser, parser_call_stack) ⇒ Object 



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# File 'lib/antlr4/runtime/semantic_context.rb', line 61

def eval(parser, parser_call_stack)
  parser.precpred(parser_call_stack, @precedence)
end

#eval_precedence(parser, parser_call_stack) ⇒ Object 



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# File 'lib/antlr4/runtime/semantic_context.rb', line 65

def eval_precedence(parser, parser_call_stack)
  SemanticContext::NONE if parser.precpred(parser_call_stack, @precedence)
end

#hash ⇒ Object 



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# File 'lib/antlr4/runtime/semantic_context.rb', line 73

def hash
  hash_code = 1
  31 * hash_code + @precedence
end

#to_s ⇒ Object

precedence >= _precedenceStack.peek()



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# File 'lib/antlr4/runtime/semantic_context.rb', line 87

def to_s
  '{' + @precedence + '>=prec}?'
end