Base class for expressions that has any amount of operands. More...

#include <qunlimitedcontainer_p.h>

Inheritance diagram for QPatternist::UnlimitedContainer:

Public Types
enum	CardinalityComputation { ProductOfCardinality, UnionOfCardinality }

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 bool	compressOperands (const StaticContext::Ptr &)

virtual Expression::List	operands () const

virtual void	setOperands (const Expression::List &list)

	UnlimitedContainer (const Expression::List &operands=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

virtual SequenceType::List	expectedOperandTypes () const =0

	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

virtual Properties	properties () 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 ()

Protected Functions
template<CardinalityComputation suppliedCard>
SequenceType::Ptr	operandsUnionType () const

Protected Functions inherited from QPatternist::Expression
void	typeCheckOperands (const StaticContext::Ptr &context)

Protected Functions inherited from QPatternist::CppCastingHelper< Expression >
	CppCastingHelper ()

Protected Variables
Expression::List	m_operands

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

Detailed Description

Base class for expressions that has any amount of operands.

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

Definition at line 71 of file qunlimitedcontainer_p.h.

Enumerations

◆ CardinalityComputation

enum QPatternist::UnlimitedContainer::CardinalityComputation

Tells how operandsUnionType() should compute the cardinality of its children.

This type is public because of a bug in the HP-UX aCC compiler.

Enumerator
ProductOfCardinality
UnionOfCardinality

Definition at line 95 of file qunlimitedcontainer_p.h.

         {
             ProductOfCardinality,
             UnionOfCardinality
         };

Constructors and Destructors

◆ UnlimitedContainer()

UnlimitedContainer::UnlimitedContainer ( const Expression::List & operands = Expression::List() )

Creates an UnlimitedContainer containing the operands operands. operands may be empty.

Definition at line 48 of file qunlimitedcontainer.cpp.

                                                                 : m_operands(ops)
 {
 }

Functions

◆ compressOperands()

bool UnlimitedContainer::compressOperands ( const StaticContext::Ptr & context )

virtual

Note: This function cannot be called before setOperands is called.

Implements QPatternist::Expression.

Definition at line 62 of file qunlimitedcontainer.cpp.

 {
     const Expression::List::iterator end(m_operands.end());
     Expression::List::iterator it(m_operands.begin());
     int evaled = 0;
 
     for(; it != end; ++it)
     {
         Q_ASSERT((*it));
         rewrite((*it), (*it)->compress(context), context);
         if((*it)->isEvaluated())
                 ++evaled;
     }
 
     return evaled == m_operands.count();
 }

◆ operands()

Expression::List UnlimitedContainer::operands ( ) const

virtual

Returns: the expression's child expressions. For example, a function's arguments is returned here.

If this Expression has no operands, an empty list should be returned.

Implements QPatternist::Expression.

Definition at line 57 of file qunlimitedcontainer.cpp.

Referenced by QPatternist::CountFN::typeCheck(), and QPatternist::OrderBy::typeCheck().

 {
     return m_operands;
 }

◆ operandsUnionType()

template<CardinalityComputation suppliedCard>

SequenceType::Ptr QPatternist::UnlimitedContainer::operandsUnionType ( ) const

inlineprotected

Computes and returns the union type of all the Expression instances in this Expression's operands.

This implementation is placed inside because CardinalityComputation can't be referenced from the outside(in conforming compilers).

Definition at line 111 of file qunlimitedcontainer_p.h.

         {
             Q_ASSERT(suppliedCard ==  ProductOfCardinality || suppliedCard == UnionOfCardinality);
             const Expression::List::const_iterator end(m_operands.constEnd());
             Expression::List::const_iterator it(m_operands.constBegin());
 
             /* Load the first one, and jump over it in the loop. */
             SequenceType::Ptr t(m_operands.first()->staticType());
             ItemType::Ptr type(t->itemType());
             Cardinality card(t->cardinality());
             ++it;
 
             for(; it != end; ++it)
             {
                 t = (*it)->staticType();
                 type |= t->itemType();
 
                 /* Since this function is a template function, it doesn't
                  * hurt performance that this test is inside the loop. */
                 if(suppliedCard == ProductOfCardinality)
                     card += t->cardinality();
                 else
                     card |= t->cardinality();
             }
 
             return makeGenericSequenceType(type, card);
         }

◆ setOperands()

void UnlimitedContainer::setOperands ( const Expression::List & list )

virtual

Implements QPatternist::Expression.

Definition at line 52 of file qunlimitedcontainer.cpp.

 {
     m_operands = list;
 }

Properties

◆ m_operands

Expression::List QPatternist::UnlimitedContainer::m_operands

protected

Definition at line 139 of file qunlimitedcontainer_p.h.

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

/src/xmlpatterns/expr/qunlimitedcontainer_p.h
/src/xmlpatterns/expr/qunlimitedcontainer.cpp

Public Types

Public Functions

Protected Functions

Protected Variables

Additional Inherited Members

Detailed Description

Enumerations

◆ CardinalityComputation

Constructors and Destructors

◆ UnlimitedContainer()

Functions

◆ compressOperands()

◆ operands()

◆ operandsUnionType()

◆ setOperands()

Properties

◆ m_operands