mono/mcs/class/System.XML/System.Xml.XPath/ChangeLog

2004-03-11  Atsushi Enomoto  <[email protected]>

	* Expression.cs,
	  DefaultContext.cs : Removed unused NeedAbsoluteMatching.
	  Added Peer and Subtree (for "peer & subtree optimization. See:
	  http://idealliance.org/papers/dx_xmle04/papers/02-03-02/02-03-02.html
	  Fixed some ToString() that caused NullReferenceException.

	* Iterator.cs : Predicate does not affect on RequireSorting.
	  Added SimpleSlashIterator for peer & subtree optimization.

	  Added PreserveWhitespace() consideration in BaseIterator.MoveNext().

2004-03-09  Atsushi Enomoto  <[email protected]>

	* Expression.cs,
	  Iterator.cs, :
	  SlashIterator is now constructed with requireSorting parameter 
	  that thus just use RequireSorting from both left/right Expressions, 
	  not iterators.
	  When attribute axis is on the left expression, the result needs to
	  be sorted.

2004-03-09  Atsushi Enomoto  <[email protected]>

	* Iterator.cs : Now for most of iterator types, Current property always
	  returns the same instance. It results in huge memory reduction.

2004-03-04  Atsushi Enomoto  <[email protected]>

	* Iterator.cs : (SlashIterator.MoveNext()) For SortedList.Add(), the
	  key should be iterator itself. Key by list count never makes sense.

2004-03-04  Atsushi Enomoto  <[email protected]>

	* Expression.cs : Significant whitespace nodes must be returned in
	  text() NodeTypeTest.

2004-02-23  Atsushi Enomoto  <[email protected]>

	* Expression.cs : xsl:sort case-order was not handled properly.

2004-02-23  Atsushi Enomoto  <[email protected]>

	* Iterator.cs :
	  In FollowingIterator, attribute and namespace nodes should be 
	  considered to have following nodes. See XPath 1.0 section 5 (esp.
	  the description on "document order").
	  On fixing @*/following::*, attribute nodes are regarded as to be
	  RequireSorting = true (which might result in duplicate).

2004-02-18  Atsushi Enomoto  <[email protected]>

	* Expression.cs : string() function expects "Infinity" and "-Infinity"
	  instead of "INF" for conversion from number. XmlConvert is for XSD,
	  not for XSLT.

2004-02-09  Atsushi Enomoto  <[email protected]>

	* Expression.cs : RelationalExpr was comparing number and node in
	  reverse order. Patch by Kazuki Oikawa. Fixed bug #72343.
	  RelationalExpr should also handle result tree fragment as node-set
	  as well as EqualityExpr. This fixes RTF case wrt #72343.

2004-02-08  Atsushi Enomoto  <[email protected]>

	* Expression.cs : tiny code format fix by Andrew Skiba.

2004-12-26  Atsushi Enomoto  <[email protected]>

	* XPathNavigator.cs : Added CheckValidity() and ValueType.
	  For SetTypedValue(), throw NotSupportedException instead of
	  NotImplementedException.

2004-12-16  Atsushi Enomoto  <[email protected]>

	* XPathNavigator.cs :added MoveToFollowing(), ReplaceSelf() and
	  all the missing attributes.

2004-12-04  Atsushi Enomoto  <[email protected]>

	* XPathDocument.cs : switch to DTMXPathNavigator2 which fully
	  eliminated string fields from struct.
	  (When we switch from struct to class, revert this change to use
	  DTMXPathNavigator, since class-based DTMXPathNavigator2 is rather
	  wasting processing speed.)

2004-12-02  Atsushi Enomoto  <[email protected]>

	* Iterator.cs : when PredicateIterator has a numeric predicate, it
	  will never be true twice. So just break up the iteration on true.
	* XPathNavigator.cs : implemented LookupPrefix().
	* Expression.cs : ExprParens.Optimize() could just return the content
	  expression.

2004-12-01  Atsushi Enomoto  <[email protected]>

	* IXPathChangeNavigable.cs,
	  XmlChangeFilters.cs,
	  XPathDocumentNodeChangedAction.cs : removed old files.

2004-12-01  Atsushi Enomoto  <[email protected]>

	* Iterator.cs : with related to the previous patch, many comments
	  got making no sense. Thanks to Harinath.

2004-12-01  Atsushi Enomoto  <[email protected]>

	* Iterator.cs : actually I mean this patch.

2004-12-01  Atsushi Enomoto  <[email protected]>

	* Iterator.cs : Create _current clone only when required. So just set
	  null when MoveNextCore() succeeded (except for some cases that
	  _current is _nav, such as SelfIterator).

2004-11-30  Atsushi Enomoto  <[email protected]>

	* Iterator.cs : SlashIterator.RequireSorting is always false. Whether
	  it has to collect nodes in prior or not and whether it might return
	  nodes in inconsistent order is different matter.
	  (It still needs to store nodes when either of branches requires
	  sorting, because they might return the same node later.)

2004-11-30  Atsushi Enomoto  <[email protected]>

	* Iterator.cs : reduced some extraneous ComparePosition() that could
	  be written as IsSamePosition(). ParentIterator doesn't have to be
	  RequireSorting.

2004-11-30  Atsushi Enomoto  <[email protected]>

	* Iterator.cs : reimplemented AncestorIterator and 
	  AncestorOrSelfIterator just to collect parents and not to move to
	  siblings. In some cases like thousands of siblings, it used to be
	  so slow, while we usually don't have so deep ancestors.

2004-11-26  Atsushi Enomoto  <[email protected]>

	* Expression.cs : warning removal. Added Optimize() which is not
	  implemented at all.
	* Tokenizer.cs : warning elimination

2004-11-24  Atsushi Enomoto  <[email protected]>

	* XPathEditableNavigator.cs, XPathChangeNavigator.cs,
	  IXPathEditable.cs : more removal of oldies.

2004-11-24  Atsushi Enomoto  <[email protected]>

	* NodeChangedEventArgs.cs, NodeChangedEventHandler.cs : removed oldies.

2004-11-08  Atsushi Enomoto  <[email protected]>

	* Tokenizer.cs : just use raw string instead of char[].
	* XPathNavigator.cs : reuse NameTable when creating XmlTextReader.

2004-11-07  Atsushi Enomoto  <[email protected]>

	* Iterator.cs :
	  - Made copy constructor certainly different from other constructors.
	  - Position is never computed in each derived type. All MoveNext() are
	    now MoveNextCore().
	  - Most of the protected members could just be private.

2004-11-05  Atsushi Enomoto  <[email protected]>

	* Expression.cs, XPathNavigator.cs : hold raw expression field for
	  get_Expression. It is preparation for expression optimization.

2004-11-05  Atsushi Enomoto  <[email protected]>

	* Iterator.cs : SimpleIterator._current could be cloned only when
	  it is required.

2004-11-05  Atsushi Enomoto  <[email protected]>

	* Iterator.cs : Some removal of Clone() were harmless.

2004-10-22  Atsushi Enomoto  <[email protected]>

	* XPathDocument.cs : now all the new stuff that used to be in 2.0 are
	  reverted.
	* XPathEditableNavigator.cs : It will be removed. Right now modified
	  a bit to pass build.
	* XPathNavigator.cs : Added members that are merged from
	  XPathEditableNavigator. Updated members name.

2004-10-14  Atsushi Enomoto  <[email protected]>

	* Iterator.cs :
	  - Added WrapperIterator to return BaseIterator in such case that 
	    variable reference is resolved to XPathNodeIterator. This fixes
	    bug #68267.
	  - Path ".." is reverse axis (actually no effect).
	  - Fixed DescendantIterator.Clone() that missed "_finished" field.
	* Expression.cs :
	  In ExprVariable.Evaluate(), use WrapperIterator() for custom
	  XPathNodeIterator.

2004-10-09  Atsushi Enomoto  <[email protected]>

	* XPathAtomicValue.cs : Init(string, XmlSchemaType) is private.

2004-10-05  Atsushi Enomoto  <[email protected]>

	* XPathAtomicValue.cs : missing Init() definition for float and string;
	  latter one resulted in infinite loop in Init(object,XmlSchemaType).

2004-10-04  Atsushi Enomoto  <[email protected]>

	* XPathNavigator.cs : TypedValue could be implemented.
	* XPathEditableNavigator.cs : removed some MonoTODO since now there 
	  are implementations.

2004-09-13  Atsushi Enomoto  <[email protected]>

	* XPathAtomicValue.cs : All .ctor() are separeted from Init().
	  In .ctor(object, XmlSchemaType):
	  - For lists that contains just one item, Init() recursively.
	  - For XPathAtomicValue, Init() recursively for its content fields.
	  For Value and TypedValue, consider typecode from XmlSchemaType.

2004-09-06  Atsushi Enomoto  <[email protected]>

	* XPathEditableNavigator.cs :
	  AppendChild(xmlReader) ignored nodes after than first one, and
	  resulted in infinite loop.
	  Added get_OuterXml overrides. set_OuterXml should not move to
	  parent before deleting current.

2004-08-25  Atsushi Enomoto  <[email protected]>

	* XPathAtomicValue.cs : Value was not returning expected value when
	  it is created as new XPathAtomicValue (object, XmlSchemaType).
	  Compute stringValue and reuse.
	* XPathNavigator.cs : Temporarily stubbed as to ignore SchemaInfo
	  (for checking XQuery implementation).

2004-08-25  Atsushi Enomoto  <[email protected]>

	* XPathAtomicValue.cs : Handle .ctor() with object parameter more
	  precisely (still not enough, for list argument).
	  Removed commended blocks.

2004-08-24  Atsushi Enomoto  <[email protected]>

	* XPathAtomicValue.cs : DateTime should be convertible to string.
	  Use schemaType's TypeCode for .ctor() that takes object.
	* XPathNavigator.cs : copied get_InnerXml from XPathEditableNavigator.
	* XPathEditableNavigator.cs : set_InnerXml should be different (new)
	  property from get_InnerXml. Removed get_InnerXml and get_OuterXml 
	  overrides.

2004-08-23  Atsushi Enomoto  <[email protected]>

	* XPathAtomicValue.cs, XPathNavigator.cs : Eliminate MS.Internal.Xml.*.

2004-08-03  Atsushi Enomoto  <[email protected]>

	* XPathEditableNavigator.cs : implemented some editor support methods.

2004-08-02  Atsushi Enomoto  <[email protected]>

	* XPathDocument.cs :
	  - For .NET 2.0, added a switch to support new XPathDocument2. 
	    If switch is off, then it uses DTM.
	  - Implemented remaining 2.0 bits (except for Obsolete ones).

	To use them in XPathDocument, set environment MONO_XPATH_DOCUMENT_2=yes
	(It is still too unstable to pass all nunit tests and standalone XSLT
	tests).

2004-07-29  Atsushi Enomoto  <[email protected]>

	* XPathNavigator.cs : Implemented ReadSubtree().

2004-07-28  Atsushi Enomoto  <[email protected]>

	* XPathDocument.cs : for .ctor() and .ctor(XmlNameTable), now it 
	  creates Mono.Xml.XPath.XPathEditableDocument and thus supports
	  IXPathEditable.CreateEditor().

2004-07-28  Atsushi Enomoto  <[email protected]>

	* XPathEditableNavigator.cs : Implemented InsertAfter() and 
	  PrependChild(); they are virtual, not abstract.
	* XPathNavigator.cs :
	  Implemented many 2.0 virtual properties and methods that were 
	  abstract in 1.x.
	  Implemented some Select() methods that uses IXmlNamespaceResolver.
	  Implemented most of ValueAsXxx() using XQueryConvert.
	  IsNode is always true. Implemented OuterXml and WriteSubtree() (but
	  actually they don't work because it depends on ReadSubtree()).

2004-07-26  Atsushi Enomoto  <[email protected]>

	* XPathDocument.cs : added missing && not-likely-to-be-removed members.
	* XPathEditableNavigator.cs : added BuildSubTree().
	* XPathException.cs : added missing methods. Hide Message in NET_2_0.

2004-07-23  Atsushi Enomoto  <[email protected]>

	* XPathNodeIterator.cs : implemented 2.0 GetEnumerator().

2004-07-21  Atsushi Enomoto  <[email protected]>

	* XPathExpression.cs, Expression.cs :
	  Added SetContext(IXmlNamespaceResolver).
	* NodeChangedEventArgs.cs : Added missing [MonoTODO].
	* XPathAtomicValue.cs : Halfly implemented.
	* XPathDocument.cs : Added 2.0 members.
	* XPathDocumentNodeChangedAction.cs : updated member names.
	* XPathEditableNavigator.cs : Added missing 2.0 members and MonoTODO.
	* XPathNavigator.cs : Added missing 2.0 members.
	  Fixed some members as virtual->override.

2004-07-13  Atsushi Enomoto  <[email protected]>

	* XmlNodeChageType.cs, XmlChangeFilters.cs : fixed enum values.
	* XPathResultType.cs : marked [MonoFIX] on .Navigator.

2004-07-11  Atsushi Enomoto  <[email protected]>

	* Expression.cs, Iterator.cs, XPathNavigator.cs :
	  Use IXmlNamespaceResolver for net 2.0. Removed unused code.
	* XPathEditableNavigator.cs : fixed namespace.
	* XPathNavigator.cs :
	  Fixed inheritance. Added missing MonoTODO.
	  Removed old .net 1.2 code. 

2004-06-18  Atsushi Enomoto  <[email protected]>

	* DefaultContext.cs : Globalization.
	* Iterator.cs : In SlashIterator.MoveNext() position might keep 0
	  in case of empty list. Thus extraneous iteration might happened.
	  Removed unused (and clone unsafe) EnumeratorIterator.

2004-06-06  Atsushi Enomoto  <[email protected]>

	* XPathDocument.s : The previous patch is still incomplete to close.

2004-06-05  Atsushi Enomoto  <[email protected]>

	* XPathDocument.cs : close self-opened XmlTextReader in .ctor().

2004-06-03  Atsushi Enomoto  <[email protected]>

	* Expression.cs : LookupNamespace() only allows already-atomized names.
	* XPathEditableNavigator.cs : removed incorrect set_OuterXml() and 
	  set_InnerXml().

2004-05-22  Atsushi Enomoto  <[email protected]>

	* DefaultContext.cs : Add XPathNavigator input support for ToBoolean()
	  and ToNavigator().
	* Expression.cs : In Equality comparison, evaluate XPathNavigator in
	  the same as well as NodeSet. This fixes bug #59134.

2004-05-22  Atsushi Enomoto  <[email protected]>

	* XPathAtomicValue.cs : missed NET_2_0.

2004-05-22  Atsushi Enomoto  <[email protected]>

	* IXPathChangeNavigable.cs,
	  IXPathEditable.cs,
	  NodeChangedEventArgs.cs,
	  NodeChangedEventHandler.cs,
	  XPathAtomicValue.cs,
	  XPathChangeNavigator.cs,
	  XPathDocumentNodeChangedAction.cs,
	  XPathEditableNavigator.cs,
	  XPathItem.cs,
	  XmlChangeFilters.cs,
	  XmlNodeChangeType.cs : added NET_2_0 classes.
	* XPathDocument.cs,
	  XPathNavigator.cs : updated NET_2_0 members.

2004-05-20  Atsushi Enomoto  <[email protected]>

	* Expression.cs : We should not catch all kind of exception. Just
	  throwing any kind of exception would be preferable.
	  Added support for XPathNavigator values.

2004-05-13  Atsushi Enomoto  <[email protected]>

	* DefaultContext.cs : Removed MonoTODO. done.
	* Expression.cs : handle XPathResultType.Navigator in some places and
	  removed MonoTODO. Mark MonoTODO with explicit comments (though they
	  are mostly pointing out possibilities of optimization).
	  Removed extra check that depended on the old bugs.
	* XPathResultType.cs : Fixed .Navigator that had the same value as
	  .String.

2004-05-12  Atsushi Enomoto  <[email protected]>

	* Parser.jay : made class internal.

2004-03-16  Atsushi Enomoto  <[email protected]>

	* XPathNavigator.cs, Iterator.cs : Considered detached nodes, the 
	  result of MoveToParent() should be checked.

2004-02-17  Atsushi Enomoto  <[email protected]>

	* XPathNavigator.cs : Only child and attribute axes are allowed for
	  Matches().
	* Expression.cs : Added IsPositional property.
	* DefaultContext.cs : Added some overrides.

2004-02-16  Atsushi Enomoto  <[email protected]>

	* XPathNavigator.cs : no, its still not ok. comment out now.

2004-02-16  Atsushi Enomoto  <[email protected]>

	* Expression.cs : Added EvaluatedNodeType and NeedAbsoluteMatching
	  to reduce extraneous Matches() trial.
	* Iterator.cs : Removed unused MergedIterator.
	* XPathNavigator.cs : Optimized Matches() not to evaluate ancestors
	  unnecessarily. (Test with NeedAbsoluteMatching).

2004-02-10  Atsushi Enomoto  <[email protected]>

	* Iterator.cs : Added overriden Count properties for some iterators
	  (this fixes the half of #50678).
	  Added ListIterator class (which can reduce GetEnumerator()). 
	  In some places we can omit clone for Current property, so added 
	  some check logic (It has no effect as yet).
	* Expression.cs, DefaultContext.cs :
	  use ListIterator instead of EnumeratorIterator.

2004-02-08  Atsushi Enomoto  <[email protected]>

	* DefaultContext.cs, Expression.cs, Iterator.cs :
	  tiny foreach elimination.

2004-02-05  Atsushi Enomoto  <[email protected]>

	* DefaultContext.cs : trivial processing order fix.

2004-01-27  Atsushi Enomoto  <[email protected]>

	* DefaultContext.cs : Avoid exception if possible.
	* Iterator.cs : Fixed PrecedingSiblingIterator.MoveNext(). When the
	  nav was positioned at the first, it incorrectly points itself.
	  Don't add names to name table while it is useless and expensive.

2004-01-08  Nick Drochak <[email protected]>

	* Iterator.cs: Removed unused variable.
	
2003-12-18 Atsushi Enomoto  <[email protected]>

	* Parser.jay : now it supresses error output from jay.
	* DefaultContext.cs : (XPathFunctionSubstring) exclude -Infinity.
	* Tokenizer.cs : better error message.
	* XPathDocument.cs : Use XmlValidatingReader to support id() function.
	  (just found MS.NET actually supports it)

2003-12-16 Atsushi Enomoto  <[email protected]>

	* Iterator.cs : On its iteration, moving Current must not affect to
	  MoveNext(). To assure this, Current must be a clone of navigator.
	  Removed unused code.

2003-12-07 Atsushi Enomoto  <[email protected]>

	* Tokenizer.cs : Removed some TODOs. (trivial ;-)
	* Iterator.cs : ParensIterator can inherit from BaseIterator.
	  SlashIterator copy .ctor() always failed to clone. This fixes Count.

2003-12-03 Atsushi Enomoto  <[email protected]>

	* Expression.cs : XPathSorters.Compare() should compare document
	  position. See last sentence of XSLT 1.0 secion 10.

2003-12-03 Atsushi Enomoto  <[email protected]>

	* DefaultContext.cs : Overrode all functions' ToString().
	  XPathFunctions.ToNumber() trims whitespaces at both side.
	  Fixed NullReferenceException in normalize-space().
	* Iterator.cs : Fixed AncestorOrSelfIterator.MoveNext() didn't handle
	  attribute or namespace node correctly.
	  SlashIterator.Clone() didn't clone "next node iterator" correctly.
	  EnumeratorIterator.ctor() should raise an error (not at Clone())
	  when the target IEnumerator is not ICloneable.

2003-11-28  Atsushi Enomoto  <[email protected]>

	* Expression.cs : namespace axis now traversed in reverse order, so it
	  requires sorting.
	* Iterator.cs : UnionIterator.Clone() was incomplete. 
	  NamespaceItarator() should be reverse order (special handling
	  because of XPathNavigator specification).

2003-11-24  Atsushi Enomoto  <[email protected]>

	* Iterator.cs : PrecedingIterator.MoveNext() now breaks up at Root.
	* XPathNavigator.cs : ComparePosition() didn't handle attributes 
	  correctly.

2003-11-24  Atsushi Enomoto  <[email protected]>

	* Parser.jay, Expression.cs, Iterator.cs :
	  Added ExprParens and ParensIterator classes which is used to handle
	  precedence of parenthesized expressions.
	  (e.g. consider "(preceding::*)[3]" and "preceding::[3]" )

	* Expression.cs, Iterator.cs :
	  Added RequireSorting property for each Expr and BaseIterator classes.
	  SlashIterator.MoveNext() now considers correct sorting. But
	  considering performance, it separates two logics, sorted and sortless
	  depending on RequireSorting of left iterator and right expression.

	* Iterator.cs :
	  SimpleIterator.ctor() should consider when nav is null.
	  FollowingIterator.MoveNext() and PrecedingIterator.MoveNext() should
	  not return any nodes.
	  AncestorIterator and AncestorOrSelfIterator copy ctr() should clone
	  positions.
	  AncestorIterator.MoveNext() should skip Root if context node is
	  Root itself.
	  FollowingIterator.MoveNext() should not handle children of context
	  itself.
	  PrecedingIterator.MoveNext() should skip its ancestors.
	  AxisIterator.ReverseAxis should be dependent on its containing iter.
	  UnionIterator.MoveNext() should consider comparison of nodes in 
	  different document. The behavior is implementation dependent.
	  (see XSLT spec 12.1)

2003-11-19  Atsushi Enomoto  <[email protected]>

	* Added XPathComparer.cs
	* DefaultContext.cs : Fixed XPathFunctionId.Evaluate() to iterate base 
	  iterator correctly, and sort results.

2003-11-19  Atsushi Enomoto  <[email protected]>

	* DefaultContext.cs : Imcomplete fix ;-)

2003-11-19  Atsushi Enomoto  <[email protected]>

	* DefaultContext.cs : XPathFunctions.ToNumber() should catch overflow.
	  XPathFunctionId.cs : Exposed Id expression.
	* Expression.cs : Added ExprLiteral.Value, and class ExprParens (it
	  will be used to solve evaluation precedence problem).

2003-11-09  Atsushi Enomoto  <[email protected]>

	* Iterator.cs : Fixed SlashIterator that might return nodes 1)in
	  inconsistent order, and 2)may return duplicate result nodes.

2003-11-06 Ben Maurer  <[email protected]>

	* Iterator.cs: (AxisIterator.ComparablePosition): Remove. Let
	it inherit from the base class. This made b[2] evaluated on 
	<a /><b /><c /><a /><b /><c /> return the first b node because
	in the ChildIterator it was the second node and seemed to satsify
	the predicate.

2003-11-04  Atsushi Enomoto  <[email protected]>

	* Iterator.cs : Added bool ReverseAxis property to identify whether
	  the iterator is in reverse order or not.  Added ComparablePosition
	  for correct position comparison for PredicateIterator and reverse-
	  order-axes.  Modified AncestorIterator, AncestorOrSelfIterator,
	  PrecedingIterator and PrecedingSiblingIterator to make MoveNext()
	  return their nodes in document order. This fixes bugzilla #39079.

2003-10-15  Atsushi Enomoto  <[email protected]>

	* Iterator.cs : DescendantIterator and FollowingIterator also should
	  not MoveNext() after they reached to the end.

2003-10-13  Atsushi Enomoto  <[email protected]>

	* Iterator.cs : Fixed UnionIterator who ignores document order.
	  Fixed SlashIterator whose MoveNext() should finish at its end.

2003-09-27 Ben Maurer  <[email protected]>

	* Iterator.cs, Expression.cs, XPathNavigator.cs: In AxisIterator
	use NameTable so we dont call strcmp.

2003-09-27 Ben Maurer  <[email protected]>

	* DefaultContext.cs (translate): translate ("abc", "c", "") = "ab"
	not "abc".
	* Iterator.cs, Expression.cs: All axes are
	SimpleIterators. SimpleIterators are gaurenteed to give the same
	XPathNavigator in Current. Make AxisIterator take a
	SimpleIterator, not any old BaseIterator. Will allow us to make
	NameTable optimizations and avoid quite a few strcmp's.

2003-09-24 Ben Maurer  <[email protected]>

	* Expression.cs: make // work right, must use another slash itr.

2003-09-21 Ben Maurer  <[email protected]>

	* Expression.cs: cant use $$ before assigned.

2003-09-21 Ben Maurer  <[email protected]>

	* Expression.cs, Parser.jay, XPathNavigator.cs: api beautification.

2003-09-20 Ben Maurer  <[email protected]>

	* Expression.cs: num != double.NaN does not work.

2003-09-19 Ben Maurer  <[email protected]>

	* Expression.cs: in NodeTypeTest dont throw an exception if it is
	an unknown node type (allows for better Pattern debugging).

2003-09-17 Ben Maurer  <[email protected]>

	* DefaultContext.cs: implement sum () and translate ().

2003-09-13 Ben Maurer  <[email protected]>

	* XPathNavigator.cs: Make methods where you pass in the context,
	so that we dont have to clone expressions so much.

2003-09-06 Ben Maurer  <[email protected]>

	* DefaultContext.cs, Expresssion.cs, Parser.jay: Rewrite so that
	system functions are actually expressions. Will allow for some
	nice optimizations.

2003-08-25 Ben Maurer  <[email protected]>

	* XPathNavigator.cs: "Smart" behavior in Matches. Nice 8x speed
	improvement in the method (5ms/call -> .7 ms / call) measured by
	monodoc's rendering of N:System.
	* Expression.cs: Utility methods to support above.

2003-08-13 Piers Haken	<[email protected]>
	
	* Iterator.cs:
		fix MergedIterator.Clone(), now clones other's iterators
		fix DescendantIterator.Clone(), now copies depth
		make iterator cloning constructors more type-specific

2003-08-01 Piers Haken	<[email protected]>

	* Expression.cs: added NodeNamespaceTest
	* XPathNavigator.cs: implement Select* with namespaces

2003-07-31 Ben Maurer  <[email protected]>

	* Iterator.cs: Allow creation of an EnumeratorIterator with an
	XmlNamespaceManager.
	
2003-07-31 Piers Haken	<[email protected]>

	* Parser.jay:
		Nested predicates (uses ExprFilter instead)
		more type safety
		make grammar look more like w3c spec
	* Expression.cs:
		remove ExprStep, ExprPredicates
		NodeTest is now a NodeSet
		more type-safety
	* Iterator.cs:
		PredicateIterator now only takes a single predicate expression
		more type-safety
	* XPathNavigator.cs:
		simplified SelectTest
	* XPathException.cs:
		fixed indenting

2003-07-30  Duncan Mak  <[email protected]>

	* XPathException.cs
	(GetObjectData): 
	(Message): Added.

2003-07-29 Piers Haken	<[email protected]>

	* DefaultContext.cs: 'local-name' returns String, not NodeSet!

2003-07-29 Piers Haken	<[email protected]>

	* XPathNavigator.cs:
	* Expression.cs:
		add typesafe Evaluate* methods

2003-07-29 Piers Haken	<[email protected]>

	* DefaultContext.cs: fix 'substring-after'

2003-07-29 Piers Haken	<[email protected]>

	* Iterator.cs: fix PredicateIterator.CurrentPosition bug (it wasn't incrementing)

2003-07-29 Ben Maurer  <[email protected]>

	* Iterator.cs: dont throw exceptions on tostring ()
	
2003-07-28  Piers Haken	<[email protected]>

	* DefaultContext.cs: better handling of null argument lists
	* XPathNavigator.cs: implement ComparePosition

2003-07-28  Piers Haken	<[email protected]>

	* Expression.cs: boolean operators: handle comparing .Any better

2003-07-28  Piers Haken	<[email protected]>

	* DefaultContext.cs: count() should return a double
	* Expression.cs: better support for handling non-double numbers

2003-07-28  Piers Haken	<[email protected]>

	* DefaultContext.cs: better function param matching

2003-07-27  Piers Haken	<[email protected]>

	* Expression.cs:
	* DefaultContext.cs:
		catch FormatExceptions while parsing numbers

2003-07-27  Piers Haken	<[email protected]>

	* Expression.cs:
		fix case sorting order
		allow EvaluateNumber to take XPathResultType.Any

2003-07-27  Piers Haken	<[email protected]>

	* Expression.cs:
	* Tokenizer.cs:
		don't pass null to XmlQualifiedName constructor

2003-07-27  Piers Haken	<[email protected]>

	* DefaultContext.cs: allow 'concat' to take arbitrary-typed arguments (spec?)

2003-07-27  Piers Haken	<[email protected]>

	* Expression.cs: allow EvaluateNodeSet to take XPathResultType.Any

2003-07-26  Piers Haken	<[email protected]>

	* Expression.cs: fix function evaluation with ambigous argument types
	* XPathNavigator.cs: fix silly null reference bug

2003-07-26  Piers Haken	<[email protected]>

	* Iterator.cs:
	* DefaultContext.cs:
		ArrayListIterator->EnumeratorIterator
	* Expression.cs: add sorting support

2003-07-26  Piers Haken	<[email protected]>

	* Tokenizer.cs:
	* Parser.jay:
		move QName parsing into tokenizer
	* Expression.cs:
		fix evaluating XPathResultType.Any
		fix ExprDiv.ToString()
		fix NodeTypeTest.ToString() (for namespace axis)

2003-07-25  Piers Haken	<[email protected]>

	* Expression.cs: return clone of $var evaluation

2003-07-26  Piers Haken	<[email protected]>

	* Iterator.cs: add setter for NamespaceManager
	* XPathNavigator.cs: propagate NamespaceManager from context on Evaluate
	* Expression.cs: fix func/var exception strings

2003-07-25  Piers Haken	<[email protected]>

	* Expression.cs: implement ExprFilter.Evaluate

2003-07-25  Piers Haken	<[email protected]>

	* Expression.cs: implement ExprVariable.Evaluate

2003-07-24  Ben Maurer <[email protected]>
	
	* DefaultContext.cs: implement lang ()

2003-07-24  Piers Haken	<[email protected]>

	* Parser.jay:
	* Expression.cs:
		allow ExprUNION to take non-nodeset (eg, $var) arguments

2003-07-24  Piers Haken	<[email protected]>

	* Tokenizer.cs: fix variable references
	* Parser.jay:
	* Expression.cs:
	* XPathNavigator.cs:
		use XmlQualifiedName

2003-06-30  Atsushi Enomoto  <[email protected]>

	* XPathDocument.cs : removed Driver class and restored authors' name
	  (though it is completely rewrote).

2003-06-30  Atsushi Enomoto  <[email protected]>

	* XPathDocument.cs : Replaced existing stub class with real
	  XPathDocument implementation.

2003-04-28  Piers Haken  <[email protected]>

	* Parser.jay, Tokenizer.cs: more compliant lexical parsing of ambiguous tokens

2003-03-07  Piers Haken  <[email protected]>

	* Tokenizer.cs: allow '.'s in NCNames

2003-03-07  Piers Haken  <[email protected]>

	* Exression.cs:
	* DefaultContext.cs:
		fixed function argument resolution

2003-02-09  Piers Haken  <[email protected]>

	* XPathNavigator.cs:
	* Iterator.cs:
	* Expression.cs: fix namespace handling

2003-01-04  Piers Haken  <[email protected]>

	* Parser.*: Remove extraneous "using" that was stopping the build. Permanently thisi time ;-)

2003-02-02  Piers Haken <[email protected]>

	* Parser.jay: add token names
	* Tokenizer.cs: fix NCName tokenization

2003-01-02  Atsushi Enomoto  <[email protected]>

	* Tokenizer.cs : Fixed ParseIdentifier to allow digits.
		(It should be a temporary fix.)

2002-09-22  Nick Drochak  <[email protected]>

	* Parser.cs: Remove extraneous "using" that was stopping the build.

2002-09-21  Piers Haken <[email protected]>

	* XPathException: implementation
	* Expression.cs:
	* Iterator.cs:
	* Parser.jay:
	* Tokenizer.jay:
	* XPathNavigator.jay:
		use XPathException.

2002-09-13  Gonzalo Paniagua Javier <[email protected]>

	* Parser.cs: commented out non-existent namespace (it compiles fine
	with mcs because of a bug that is already on bugzilla).

2002-09-12  Piers Haken <[email protected]>

	* Tokenizer.cs: fix parsing numbers that start with '.'
	* DefaultContext.cs: use MS-compatible formatting of doubles

2002-09-12  Piers Haken <[email protected]>

	* Iterator.cs: added NullIterator to handle unspecified contexts
	* XPathNavigator.cs: use NullIterator insted of SelfIterator when context is unspecified.
	* XPathNodeIterator.cs: change default _count to -1 to prevent recalculations for NullIterators

2002-09-12  Piers Haken <[email protected]>

	* Expression.cs, Parser.jay: allow ExprSLASH to take a generic expression as its left argument.
	* Iterator.cs: fix SlashIterator.Clone() when _iterRight is null.
	* DefaultContext.cs: fix id() return type.

2002-09-03  Gonzalo Paniagua Javier <[email protected]>

	* DefaultContext.cs: fixed bug #28840.
	* Expression.cs: added FIXME.

2002-08-17  Jason Diamond <[email protected]>

	* XPathNavigator.cs: Fixed matching on patterns that look like
	absolute XPath expressions.

2002-08-17  Jason Diamond <[email protected]>

	* XPathNavigator.cs: Added naive (but working) implementation of
	 Matches.

2002-07-31  Piers Haken <[email protected]>

	* XPathDocument.cs: simple, XmlDocument-based implementation

2002-07-25  Piers Haken <[email protected]>

	* DefaultContext.cs: implement XPathFunctionName 'name()' function.

2002-07-17  Piers Haken <[email protected]>
	
	* DefaultContext.cs: implement 'string-length()', 'normalize-space()'
	* Parser.jay: remove redundant production
	* Expression.cs: add switches for debugging under VS.NET

2002-07-17  Piers Haken <[email protected]>

	* Expression.cs: implement nodeset/nodeset comparisons (non-optimal)

2002-07-15  Piers Haken <[email protected]>

	* Iterator.cs:
		- rename UnionIterator to MergedIterator, 
		- create new UnionIterator to implment uniqueness for '|' operator
		- fix position bug in ArrayListIterator.Clone()
	* Expression.cs: use new UnionIterator constructor syntax

2002-07-12  Piers Haken <[email protected]>

	* Iterator.cs: PredicateIterator: handle numeric predicates
	* Parser.jay: add some debugging support: yyparseDebug
	* Tokenizer.cs: cleanup, include '-' chars in identifier tokens

2002-06-29  Piers Haken <[email protected]>

	* Expression.cs:
		- remove dead code
		- NodeTest uses XPathResultType instead of internal NodeTestTypes enum
		- remove NodeTestTypes enum
		- remove NodeTestTypeAny (functionality provided by base now)
		- fix ExprStep to handle wildcard QNames
	* Parser.jay:
		- moved to Mono.Xml.XPath namespace
		- use XPathResultType
		- handle wildcard QNames
		
	* Tokenizer.cs: moved to Mono.Xml.XPath namespace
	
	* XPathNavigator.cs: implement
		- IsDescendant
		- SelectAncestors
		- SelectDescendants
		- SelectChildren
		
	* XPathResultType.cs: fix enum values
	
2002-06-24  Jason Diamond  <[email protected]>

	* XPathScanner.cs: Removed.

2002-06-24  Dick Porter <[email protected]>

	* XmlCaseOrder.cs: Fix namespace

2002-06-23  Piers Haken <[email protected]>

	* DefaultContext.cs: implemented XPathFUnctionId
	* Iterator.cs: new ArrayListIterator for id() support

2002-06-23  Piers Haken <[email protected]>

	* XPathNavigator.cs: implement:
		- Compile
		- Evaluate
		- Clone
		- Select
		- ToString
		- some forwarding methods

	* XPathNodeIterator: implement caching Count

	* Tokenizer.cs: new XPath tokenizer
	* Parser.jay: new XPath grammar
	* Parser.cs: new precompiled XPath grammar
	* Expression.cs: new XPath expression objects
	* Iterator.cs: new XPath result/context objects
	* DefaultContext.cs: new XPath function binding context

2002-05-08  Tim Coleman <[email protected]>
	* XPathDocument.cs:
	* XPathException.cs: New stub files added.

2002-04-12  Duncan Mak  <[email protected]>

	* XmlCaseOrder.cs: Moved to here from System.Xml.

2002-03-26  Jason Diamond  <[email protected]>

	* XPathScanner.cs: Now handles name tests with wildacards. Abbreviated 
	steps. Both absolution and relative abbreviated location paths.

2002-03-25  Jason Diamond  <[email protected]>

	* XPathScanner.cs: Added new file. This class is supposed to be internal
	but that would make it impossible to test.

2002-03-08  Duncan Mak  <[email protected]>

	* XPathNamespaceScope.cs:
	* XPathNodeType.cs:
	* XPathResultType.cs:
	* XmlDataType.cs:
	* XmlSortOrder.cs: Used EnumCheck and realigned elements to be compatible with MS
	implementation. XPathResultType is interesting as EnumCheck does
	not show the Navigator element, but shows the String element twice.

2002-03-08  Jason Diamond  <[email protected]>

	* XmlDataType.cs, XmlSortOrder.cs, XPathNodeType.cs: Added files.

2002-03-06  Jason Diamond  <[email protected]>

	* ChangeLog: Added to this directory.

	* XPathExpression.cs, XPathNamespaceScope.cs, XPathNodeIterator.cs,
	XPathResultType.cs: New files.

	* XPathNavigator.cs: Stubbed out all properties and methods.