QPatternist::VariableReference Class Reference

Baseclass for classes being references to variables. More...

#include <qvariablereference_p.h>

Inheritance diagram for QPatternist::VariableReference:

Public Types
typedef QList< VariableReference::Ptr >	List
typedef QExplicitlySharedDataPointer< VariableReference >	Ptr
Public Types inherited from QPatternist::Expression
typedef QExplicitlySharedDataPointer< const Expression >	ConstPtr
	A smart pointer wrapping const Expression instances. More...
enum	ID {   IDBooleanValue = 1, IDCountFN, IDEmptyFN, IDExistsFN,   IDExpressionSequence, IDGeneralComparison, IDIfThenClause, IDIgnorableExpression,   IDIntegerValue, IDPositionFN, IDStringValue, IDValueComparison,   IDRangeVariableReference, IDContextItem, IDUserFunctionCallsite, IDExpressionVariableReference,   IDAttributeConstructor, IDUpperCaseFN, IDLowerCaseFN, IDFirstItemPredicate,   IDEmptySequence, IDReturnOrderBy, IDLetClause, IDForClause,   IDPath, IDNamespaceConstructor, IDArgumentReference, IDGenericPredicate,   IDAxisStep, IDFloat, IDCombineNodes, IDUnresolvedVariableReference,   IDCardinalityVerifier }
typedef QList< Expression::Ptr >	List
typedef QFlags< Property >	Properties
enum	Property {   UseContextItem = 1, DisableElimination = 1 << 1, IsEvaluated = 1 << 2, DisableTypingDeduction = 1 << 3,   EmptynessFollowsChild = 1 << 4, RewriteToEmptyOnEmpty = 1 << 5, RequiresFocus = 1 << 6, AffectsOrderOnly = 1 << 7,   RequiresContextItem = (1 << 8) | RequiresFocus, CreatesFocusForLast = 1 << 9, LastOperandIsCollation = 1 << 10, DependsOnLocalVariable = (1 << 11) | DisableElimination,   EvaluationCacheRedundant = (1 << 12), IsNodeConstructor = 1 << 13, RequiresCurrentItem = 1 << 14 }
typedef QExplicitlySharedDataPointer< Expression >	Ptr
	A smart pointer wrapping mutable Expression instances. More...
typedef ::QAbstractXmlForwardIterator< Expression::Ptr >	QAbstractXmlForwardIterator
typedef QVector< Expression::Ptr >	Vector

Public Functions
virtual Properties	properties () const
VariableSlotID	slot () const
	VariableReference (const VariableSlotID slot)
Public Functions inherited from QPatternist::EmptyContainer
virtual Expression::List	operands () const
virtual void	setOperands (const Expression::List &)
Public Functions inherited from QPatternist::Expression
virtual ExpressionVisitorResult::Ptr	accept (const ExpressionVisitor::Ptr &visitor) const =0
virtual const SourceLocationReflection *	actualReflection () const
	Returns this. More...
virtual void	announceFocusType (const ItemType::Ptr &itemType)
virtual Expression::Ptr	compress (const StaticContext::Ptr &context)
Properties	deepProperties () const
	Computes the union of properties for this Expression and all its descending children. More...
virtual Properties	dependencies () const
virtual QString	description () const
virtual bool	evaluateEBV (const DynamicContext::Ptr &context) const
virtual Item::Iterator::Ptr	evaluateSequence (const DynamicContext::Ptr &context) const
virtual Item	evaluateSingleton (const DynamicContext::Ptr &context) const
virtual void	evaluateToSequenceReceiver (const DynamicContext::Ptr &context) const
virtual ItemType::Ptr	expectedContextItemType () const
	Expression ()
bool	has (const Property prop) const
bool	hasDependency (const Property prop) const
virtual ID	id () const
bool	is (const ID id) const
bool	isEvaluated () const
virtual ItemType::Ptr	newFocusType () const
virtual QList< QExplicitlySharedDataPointer< OptimizationPass > >	optimizationPasses () const
virtual PatternPriority	patternPriority () const
const Expression::Ptr &	rewrite (const Expression::Ptr &to, const StaticContext::Ptr &context) const
	Rewrites this Expression to to, and return to. More...
virtual SequenceType::Ptr	staticType () const =0
virtual Expression::Ptr	typeCheck (const StaticContext::Ptr &context, const SequenceType::Ptr &reqType)
virtual	~Expression ()
Public Functions inherited from QSharedData
	QSharedData ()
	Constructs a QSharedData object with a reference count of 0. More...
	QSharedData (const QSharedData &)
	Constructs a QSharedData object with reference count 0. More...
Public Functions inherited from QPatternist::CppCastingHelper< Expression >
const TCastTarget *	as () const
TCastTarget *	as ()
Public Functions inherited from QPatternist::SourceLocationReflection
virtual QSourceLocation	sourceLocation () const
	SourceLocationReflection ()
virtual	~SourceLocationReflection ()

Properties
const VariableSlotID	m_varSlot

Additional Inherited Members
Static Public Functions inherited from QPatternist::Expression
static void	rewrite (Expression::Ptr &old, const Expression::Ptr &New, const StaticContext::Ptr &context)
Public Variables inherited from QSharedData
QAtomicInt	ref
Protected Functions inherited from QPatternist::EmptyContainer
virtual bool	compressOperands (const StaticContext::Ptr &context)
virtual SequenceType::List	expectedOperandTypes () const
Protected Functions inherited from QPatternist::Expression
void	typeCheckOperands (const StaticContext::Ptr &context)
Protected Functions inherited from QPatternist::CppCastingHelper< Expression >
	CppCastingHelper ()

Detailed Description

Baseclass for classes being references to variables.

Author

Frans Englich frans.nosp@m..eng.nosp@m.lich@.nosp@m.noki.nosp@m.a.com

Definition at line 71 of file qvariablereference_p.h.

Typedefs

List

typedef QList<VariableReference::Ptr> QPatternist::VariableReference::List

Definition at line 75 of file qvariablereference_p.h.

Ptr

typedef QExplicitlySharedDataPointer<VariableReference> QPatternist::VariableReference::Ptr

Definition at line 74 of file qvariablereference_p.h.

Constructors and Destructors

VariableReference()

VariableReference::VariableReference

(

const VariableSlotID

slot

)

Creates a VariableReference.

Parameters

slot	must be a valid slot. That is, zero or larger.

Definition at line 48 of file qvariablereference.cpp.

                                                               : m_varSlot(slotP)
{
    Q_ASSERT(m_varSlot > -1);
}

Functions

properties()

Expression::Properties VariableReference::properties ( ) const

virtual

Returns

DisableElimination

Reimplemented from QPatternist::Expression.

Reimplemented in QPatternist::PositionalVariableReference, and QPatternist::RangeVariableReference.

Definition at line 53 of file qvariablereference.cpp.

{
    return DisableElimination;
}

slot()

VariableSlotID QPatternist::VariableReference::slot ( ) const

inline

Returns

the slot that this reference communicates through.

This is a slot in the DynamicContext. Which one, depends on the type, which this VariableReference does not have information about. For instance, it could DynamicContext::expressionVariable() or DynamicContext::rangeVariable().

Definition at line 110 of file qvariablereference_p.h.

Referenced by QPatternist::checkVariableCircularity(), QPatternist::ArgumentReference::evaluateEBV(), QPatternist::RangeVariableReference::evaluateEBV(), QPatternist::ExpressionVariableReference::evaluateEBV(), QPatternist::ArgumentReference::evaluateSequence(), QPatternist::ExpressionVariableReference::evaluateSequence(), QPatternist::PositionalVariableReference::evaluateSingleton(), QPatternist::ArgumentReference::evaluateSingleton(), QPatternist::RangeVariableReference::evaluateSingleton(), and QPatternist::ExpressionVariableReference::evaluateSingleton().

    {
        return m_varSlot;
    }

Properties

m_varSlot

const VariableSlotID QPatternist::VariableReference::m_varSlot

private

The slot. Same as returned by slot().

This variable is not called m_slot, because that creates a weird compiler error on hpuxi-acc. See the preprocessor output. EvaluationCache::m_varSlot is a similar workaround.

Definition at line 107 of file qvariablereference_p.h.

Referenced by slot(), and VariableReference().

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The documentation for this class was generated from the following files:

• /src/xmlpatterns/expr/qvariablereference_p.h
• /src/xmlpatterns/expr/qvariablereference.cpp