public override IEquation VisitLessThan(BasicParser.LessThanContext context)
        {
            var expressionVisitor = new ExpressionVisitor();
            var left     = expressionVisitor.Visit(context.expression(0));
            var right    = expressionVisitor.Visit(context.expression(1));
            var equation = new LessThanEquation(left, right);

            return(equation);
        }
 /// <summary>
 /// Visit a parse tree produced by the <c>lessThan</c>
 /// labeled alternative in <see cref="BasicParser.equation"/>.
 /// <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 VisitLessThan([NotNull] BasicParser.LessThanContext context)
 {
     return(VisitChildren(context));
 }
 /// <summary>
 /// Exit a parse tree produced by the <c>lessThan</c>
 /// labeled alternative in <see cref="BasicParser.equation"/>.
 /// <para>The default implementation does nothing.</para>
 /// </summary>
 /// <param name="context">The parse tree.</param>
 public virtual void ExitLessThan([NotNull] BasicParser.LessThanContext context)
 {
 }