예제 #1
0
        //When a single factor is parsed in Algo.
        public override object VisitFactor([NotNull] algoParser.FactorContext context)
        {
            //Is there a power?
            if (context.POW_OP() != null)
            {
                //Yes.
                //Evaluate left factor.
                AlgoValue left = (AlgoValue)VisitFactor(context.factor());

                //Evaluate right sub.
                AlgoValue right = (AlgoValue)VisitSub(context.sub());

                //Perform a power.
                return(AlgoOperators.Pow(context, left, right));
            }
            else
            {
                //No, just evaluate the sub.
                return((AlgoValue)VisitSub(context.sub()));
            }

            //Error.
            throw new Exception("Invalid expression type.");
        }
예제 #2
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 /// <summary>
 /// Visit a parse tree produced by <see cref="algoParser.factor"/>.
 /// <para>
 /// The default implementation returns the result of calling <see cref="AbstractParseTreeVisitor{Result}.VisitChildren(IRuleNode)"/>
 /// on <paramref name="context"/>.
 /// </para>
 /// </summary>
 /// <param name="context">The parse tree.</param>
 /// <return>The visitor result.</return>
 public virtual Result VisitFactor([NotNull] algoParser.FactorContext context)
 {
     return(VisitChildren(context));
 }
예제 #3
0
 /// <summary>
 /// Exit a parse tree produced by <see cref="algoParser.factor"/>.
 /// <para>The default implementation does nothing.</para>
 /// </summary>
 /// <param name="context">The parse tree.</param>
 public virtual void ExitFactor([NotNull] algoParser.FactorContext context)
 {
 }