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/*
* Copyright (c) 2015, Intel Corporation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Intel Corporation nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/** \file
* \brief Visitor base class for working with the component tree.
*/
#ifndef CONSTCOMPONENTVISITOR_H
#define CONSTCOMPONENTVISITOR_H
namespace ue2 {
class AsciiComponentClass;
class Component;
class ComponentAlternation;
class ComponentAssertion;
class ComponentAtomicGroup;
class ComponentBackReference;
class ComponentBoundary;
class ComponentByte;
class ComponentCondReference;
class ComponentClass;
class ComponentEmpty;
class ComponentEUS;
class ComponentRepeat;
class ComponentSequence;
class ComponentWordBoundary;
class UTF8ComponentClass;
/**
* \brief Visitor base class for traversing an immutable component tree.
*
* Our approach to implementing the visitor pattern for traversing the
* Component tree for a pattern. This version operates on an immutable tree;
* use \ref ComponentVisitor if you need to make changes to components during
* traversal.
*/
class ConstComponentVisitor {
public:
virtual ~ConstComponentVisitor();
virtual void pre(const AsciiComponentClass &c) = 0;
virtual void pre(const ComponentAlternation &c) = 0;
virtual void pre(const ComponentAssertion &c) = 0;
virtual void pre(const ComponentAtomicGroup &c) = 0;
virtual void pre(const ComponentBackReference &c) = 0;
virtual void pre(const ComponentBoundary &c) = 0;
virtual void pre(const ComponentByte &c) = 0;
virtual void pre(const ComponentCondReference &c) = 0;
virtual void pre(const ComponentEmpty &c) = 0;
virtual void pre(const ComponentEUS &c) = 0;
virtual void pre(const ComponentRepeat &c) = 0;
virtual void pre(const ComponentSequence &c) = 0;
virtual void pre(const ComponentWordBoundary &c) = 0;
virtual void pre(const UTF8ComponentClass &c) = 0;
virtual void during(const AsciiComponentClass &c) = 0;
virtual void during(const ComponentAlternation &c) = 0;
virtual void during(const ComponentAssertion &c) = 0;
virtual void during(const ComponentAtomicGroup &c) = 0;
virtual void during(const ComponentBackReference &c) = 0;
virtual void during(const ComponentBoundary &c) = 0;
virtual void during(const ComponentByte &c) = 0;
virtual void during(const ComponentCondReference &c) = 0;
virtual void during(const ComponentEmpty &c) = 0;
virtual void during(const ComponentEUS &c) = 0;
virtual void during(const ComponentRepeat &c) = 0;
virtual void during(const ComponentSequence &c) = 0;
virtual void during(const ComponentWordBoundary &c) = 0;
virtual void during(const UTF8ComponentClass &c) = 0;
virtual void post(const AsciiComponentClass &c) = 0;
virtual void post(const ComponentAlternation &c) = 0;
virtual void post(const ComponentAssertion &c) = 0;
virtual void post(const ComponentAtomicGroup &c) = 0;
virtual void post(const ComponentBackReference &c) = 0;
virtual void post(const ComponentBoundary &c) = 0;
virtual void post(const ComponentByte &c) = 0;
virtual void post(const ComponentCondReference &c) = 0;
virtual void post(const ComponentEmpty &c) = 0;
virtual void post(const ComponentEUS &c) = 0;
virtual void post(const ComponentRepeat &c) = 0;
virtual void post(const ComponentSequence &c) = 0;
virtual void post(const ComponentWordBoundary &c) = 0;
virtual void post(const UTF8ComponentClass &c) = 0;
};
/**
* \brief Concrete subclass of ConstComponentVisitor with default behaviour,
* allowing you to just implement the member functions you need.
*/
class DefaultConstComponentVisitor : public ConstComponentVisitor {
public:
DefaultConstComponentVisitor();
~DefaultConstComponentVisitor() override;
void pre(const AsciiComponentClass &c) override;
void pre(const ComponentAlternation &c) override;
void pre(const ComponentAssertion &c) override;
void pre(const ComponentAtomicGroup &c) override;
void pre(const ComponentBackReference &c) override;
void pre(const ComponentBoundary &c) override;
void pre(const ComponentByte &c) override;
void pre(const ComponentCondReference &c) override;
void pre(const ComponentEmpty &c) override;
void pre(const ComponentEUS &c) override;
void pre(const ComponentRepeat &c) override;
void pre(const ComponentSequence &c) override;
void pre(const ComponentWordBoundary &c) override;
void pre(const UTF8ComponentClass &c) override;
void during(const AsciiComponentClass &c) override;
void during(const ComponentAlternation &c) override;
void during(const ComponentAssertion &c) override;
void during(const ComponentAtomicGroup &c) override;
void during(const ComponentBackReference &c) override;
void during(const ComponentBoundary &c) override;
void during(const ComponentByte &c) override;
void during(const ComponentCondReference &c) override;
void during(const ComponentEmpty &c) override;
void during(const ComponentEUS &c) override;
void during(const ComponentRepeat &c) override;
void during(const ComponentSequence &c) override;
void during(const ComponentWordBoundary &c) override;
void during(const UTF8ComponentClass &c) override;
void post(const AsciiComponentClass &c) override;
void post(const ComponentAlternation &c) override;
void post(const ComponentAssertion &c) override;
void post(const ComponentAtomicGroup &c) override;
void post(const ComponentBackReference &c) override;
void post(const ComponentBoundary &c) override;
void post(const ComponentByte &c) override;
void post(const ComponentCondReference &c) override;
void post(const ComponentEmpty &c) override;
void post(const ComponentEUS &c) override;
void post(const ComponentRepeat &c) override;
void post(const ComponentSequence &c) override;
void post(const ComponentWordBoundary &c) override;
void post(const UTF8ComponentClass &c) override;
};
} // namespace ue2
#endif // CONSTCOMPONENTVISITOR_H
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