VisitIsEmpty()

override QilNode System.Xml.Xsl.IlGen.XmlILOptimizerVisitor.VisitIsEmpty ( QilUnary local0 )

inlineprotectedvirtual

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

Definition at line 2639 of file XmlILOptimizerVisitor.cs.

    {
        QilNode qilNode = local0[0];
        if (this[XmlILOptimization.FoldNone] && (object)qilNode.XmlType == XmlQueryTypeFactory.None && AllowReplace(XmlILOptimization.FoldNone, local0))
        {
            return Replace(XmlILOptimization.FoldNone, local0, VisitNop(f.Nop(qilNode)));
        }
        if (this[XmlILOptimization.EliminateIsEmpty] && qilNode.NodeType == QilNodeType.Sequence && qilNode.Count == 0 && AllowReplace(XmlILOptimization.EliminateIsEmpty, local0))
        {
            return Replace(XmlILOptimization.EliminateIsEmpty, local0, VisitTrue(f.True()));
        }
        if (this[XmlILOptimization.EliminateIsEmpty] && !qilNode.XmlType.MaybeEmpty && !OptimizerPatterns.Read(qilNode).MatchesPattern(OptimizerPatternName.MaybeSideEffects) && AllowReplace(XmlILOptimization.EliminateIsEmpty, local0))
        {
            return Replace(XmlILOptimization.EliminateIsEmpty, local0, VisitFalse(f.False()));
        }
        if (this[XmlILOptimization.EliminateIsEmpty] && !qilNode.XmlType.MaybeEmpty && AllowReplace(XmlILOptimization.EliminateIsEmpty, local0))
        {
            return Replace(XmlILOptimization.EliminateIsEmpty, local0, VisitLoop(f.Loop(VisitLet(f.Let(qilNode)), VisitFalse(f.False()))));
        }
        return NoReplace(local0);
    }

References System.Xml.Xsl.IlGen.XmlILOptimizerVisitor.AllowReplace(), System.Collections.Generic.Dictionary< TKey, TValue >.Count, System.Xml.Xsl.Qil.QilReplaceVisitor.f, System.Xml.Xsl.Qil.QilFactory.False(), System.Xml.Xsl.Qil.QilFactory.Let(), System.Xml.Xsl.Qil.QilFactory.Loop(), System.Xml.Xsl.XmlQueryTypeFactory.None, System.Xml.Xsl.Qil.QilFactory.Nop(), System.Xml.Xsl.IlGen.XmlILOptimizerVisitor.NoReplace(), System.Xml.Xsl.IlGen.OptimizerPatterns.Read(), System.Xml.Replace, System.Xml.Xsl.Qil.QilFactory.True(), System.Xml.Xsl.Qil.QilPatternVisitor.VisitFalse(), System.Xml.Xsl.IlGen.XmlILOptimizerVisitor.VisitLet(), System.Xml.Xsl.IlGen.XmlILOptimizerVisitor.VisitLoop(), System.Xml.Xsl.IlGen.XmlILOptimizerVisitor.VisitNop(), and System.Xml.Xsl.Qil.QilPatternVisitor.VisitTrue().

Referenced by System.Xml.Xsl.IlGen.XmlILOptimizerVisitor.VisitEq(), System.Xml.Xsl.IlGen.XmlILOptimizerVisitor.VisitGt(), System.Xml.Xsl.IlGen.XmlILOptimizerVisitor.VisitIsType(), System.Xml.Xsl.IlGen.XmlILOptimizerVisitor.VisitNe(), and System.Xml.Xsl.IlGen.XmlILOptimizerVisitor.VisitTypeAssert().