1 /*
2  * Copyright (c) 2015, Intel Corporation
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions are met:
6  *
7  *  * Redistributions of source code must retain the above copyright notice,
8  *    this list of conditions and the following disclaimer.
9  *  * Redistributions in binary form must reproduce the above copyright
10  *    notice, this list of conditions and the following disclaimer in the
11  *    documentation and/or other materials provided with the distribution.
12  *  * Neither the name of Intel Corporation nor the names of its contributors
13  *    may be used to endorse or promote products derived from this software
14  *    without specific prior written permission.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
20  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26  * POSSIBILITY OF SUCH DAMAGE.
27  */
28 
29 /** \file
30  * \brief Back-references (/([a-f]{3}).*\\1/)
31  */
32 
33 #ifndef _RE_COMPONENTBACKREFERENCE_H_
34 #define _RE_COMPONENTBACKREFERENCE_H_
35 
36 #include "Component.h"
37 #include <string>
38 
39 namespace ue2 {
40 
41 class ComponentBackReference : public Component {
42     friend class DumpVisitor;
43     friend class PrintVisitor;
44     friend class ReferenceVisitor;
45 public:
46     explicit ComponentBackReference(unsigned int id);
47     explicit ComponentBackReference(const std::string &s);
~ComponentBackReference()48     ~ComponentBackReference() override {}
49     ComponentBackReference *clone() const override;
50 
accept(ComponentVisitor & v)51     Component *accept(ComponentVisitor &v) override {
52         Component *c = v.visit(this);
53         v.post(this);
54         return c;
55     }
56 
accept(ConstComponentVisitor & v)57     void accept(ConstComponentVisitor &v) const override {
58         v.pre(*this);
59         v.during(*this);
60         v.post(*this);
61     }
62 
getRefID()63     unsigned int getRefID() const { return ref_id; }
getRefName()64     const std::string &getRefName() const { return name; }
65 
66     std::vector<PositionInfo> first() const override;
67     std::vector<PositionInfo> last() const override;
68     bool empty(void) const override;
69     void notePositions(GlushkovBuildState &bs) override;
70     void buildFollowSet(GlushkovBuildState &bs,
71                         const std::vector<PositionInfo> &lastPos) override;
72 
73 private:
74     // Private copy ctor. Use clone instead.
ComponentBackReference(const ComponentBackReference & other)75     ComponentBackReference(const ComponentBackReference &other)
76         : Component(other), name(other.name), ref_id(other.ref_id) {}
77 
78     std::string name;
79     unsigned int ref_id;
80 };
81 
82 } // namespace ue2
83 
84 #endif
85