◆ VisitLength()

override QilNode System.Xml.Xsl.IlGen.XmlILVisitor.VisitLength ( QilUnary ndSetLen )

inlineprotectedvirtual

Reimplemented from System.Xml.Xsl.Qil.QilVisitor.

Definition at line 598 of file XmlILVisitor.cs.

    {
        Label label = _helper.DefineLabel();
        OptimizerPatterns optimizerPatterns = OptimizerPatterns.Read(ndSetLen);
        if (CachesResult(ndSetLen.Child))
        {
            NestedVisitEnsureStack(ndSetLen.Child);
            _helper.CallCacheCount(_iterNested.Storage.ItemStorageType);
        }
        else
        {
            _helper.Emit(OpCodes.Ldc_I4_0);
            StartNestedIterator(ndSetLen.Child, label);
            Visit(ndSetLen.Child);
            _iterCurr.EnsureNoCache();
            _iterCurr.DiscardStack();
            _helper.Emit(OpCodes.Ldc_I4_1);
            _helper.Emit(OpCodes.Add);
            if (optimizerPatterns.MatchesPattern(OptimizerPatternName.MaxPosition))
            {
                _helper.Emit(OpCodes.Dup);
                _helper.LoadInteger((int)optimizerPatterns.GetArgument(OptimizerPatternArgument.ElementQName));
                _helper.Emit(OpCodes.Bgt, label);
            }
            _iterCurr.LoopToEnd(label);
            EndNestedIterator(ndSetLen.Child);
        }
        _iterCurr.Storage = StorageDescriptor.Stack(typeof(int), isCached: false);
        return ndSetLen;
    }