public override double VisitAdditiveExpr(CalcParser.AdditiveExprContext context)
{
var left = WalkLeft(context);
var right = WalkRight(context);
if (context.operatorToken.Type == CalcLexer.ADD)
{
Debug.WriteLine("{0} + {1}", left, right);
return(left + right);
}
else
{
Debug.WriteLine("{0} - {1}", left, right);
return(left - right);
}
}
/// <summary>
/// Visit a parse tree produced by the <c>AdditiveExpr</c>
/// labeled alternative in <see cref="CalcParser.expression"/>.
/// <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 VisitAdditiveExpr([NotNull] CalcParser.AdditiveExprContext context)
{
return(VisitChildren(context));
}
/// <summary>
/// Exit a parse tree produced by the <c>AdditiveExpr</c>
/// labeled alternative in <see cref="CalcParser.expression"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitAdditiveExpr([NotNull] CalcParser.AdditiveExprContext context)
{
}
