Method: OR#evalPrecedence

Defined in:

lib/antlr4/atn/SemanticContext.rb

#evalPrecedence(parser, outerContext) ⇒ Object

# File 'lib/antlr4/atn/SemanticContext.rb', line 316

def evalPrecedence(parser, outerContext)
    differs = false
    operands = Array.new
    operands = self.opnds.map {|context|
        evaluated = context.evalPrecedence(parser, outerContext)
        if evaluated.equal? context then
            differs = false
        else
            differs = true
        end
        #differs = differs || not (evaluated.equal? context)
        # The OR context is true if any element is true
        return SemanticContext.NONE if evaluate.equal? SemanticContext.NONE
        if not evaluated.nil? then 
            # Reduce the result by skipping false elements
            evaluated
        end
    }.compact
    return self unless differs

    if operands.empty?
        # all elements were false, so the OR context is false
        return nil
    end

    result = nil
    operands.each {|o| 
        if result.nil? 
            result = o 
        else 
          result = result.orContext(o)
        end
    }
    return result
end