// addExpr op=('+'|'-') multExpr public override object VisitAddExpr([NotNull] WSParser.AddExprContext context) { var left = Int32.Parse(Visit(context.expr()[0]).ToString()); var right = Int32.Parse(Visit(context.expr()[1]).ToString()); switch (context.op.Text) { case "+": return(left + right); case "-": return(left - right); default: Console.WriteLine("Unkown op " + context.op.Text); break; } return(base.VisitAddExpr(context)); }
/// <summary> /// Exit a parse tree produced by the <c>AddExpr</c> /// labeled alternative in <see cref="WSParser.expr"/>. /// <para>The default implementation does nothing.</para> /// </summary> /// <param name="context">The parse tree.</param> public virtual void ExitAddExpr([NotNull] WSParser.AddExprContext context) { }
/// <summary> /// Visit a parse tree produced by the <c>AddExpr</c> /// labeled alternative in <see cref="WSParser.expr"/>. /// <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 VisitAddExpr([NotNull] WSParser.AddExprContext context) { return(VisitChildren(context)); }