QPatternist::ExpressionCreator Class Reference

A factory for creating Expression instances. More...

#include <qoptimizerframework_p.h>

Inheritance diagram for QPatternist::ExpressionCreator:

Public Types
typedef QExplicitlySharedDataPointer< ExpressionCreator >	Ptr

Public Functions
virtual Expression::Ptr	create (const Expression::List &operands, const StaticContext::Ptr &context, const SourceLocationReflection *const) const =0
	ExpressionCreator ()
virtual	~ExpressionCreator ()
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...

Additional Inherited Members
Public Variables inherited from QSharedData
QAtomicInt	ref

Detailed Description

A factory for creating Expression instances.

ExpressionIdentifier is one of the building block of Patternist's optimizer framework. An ExpressionIdentifier sub-class has the responsibility of creating the Expression that should be the result of the optimization.

This class and sub-classes are never used on their own, but in cooperation with OptimizationPass.

Author

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

Definition at line 79 of file qoptimizerframework_p.h.

Typedefs

Ptr

typedef QExplicitlySharedDataPointer<ExpressionCreator> QPatternist::ExpressionCreator::Ptr

Definition at line 82 of file qoptimizerframework_p.h.

Constructors and Destructors

ExpressionCreator()

QPatternist::ExpressionCreator::ExpressionCreator ( )

inline

For some reason this constructor cannot be synthesized.

Definition at line 87 of file qoptimizerframework_p.h.

        {
        }

~ExpressionCreator()

ExpressionCreator::~ExpressionCreator ( )

virtual

Definition at line 52 of file qoptimizerframework.cpp.

Referenced by ExpressionCreator().

{
}

Functions

create()

virtual Expression::Ptr QPatternist::ExpressionCreator::create ( const Expression::List &  operands, const StaticContext::Ptr &  context, const SourceLocationReflection *  const  ) const

pure virtual

Creates an expression that has operands as operands.

The Expression that is returned is guaranteed, by the caller, to get a treatment identical to if the expression was created in an ordinary compilation(via the parser, and so forth). That is, Expression::typeCheck() and Expression::compress() stages will be carried out on the returned expression.

Returns

an Expression::Ptr that never is non null, valid pointer

Implemented in QPatternist::ByIDCreator.

Referenced by ExpressionCreator().

---

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

• /src/xmlpatterns/expr/qoptimizerframework_p.h
• /src/xmlpatterns/expr/qoptimizerframework.cpp