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
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27  */
28 
29 /** \file
30  * \brief Extended Unicode sequences (\\X)
31  */
32 
33 #ifndef _RE_COMPONENTEXTENDEDUNICODESEQUENCE_H_
34 #define _RE_COMPONENTEXTENDEDUNICODESEQUENCE_H_
35 
36 #include "Component.h"
37 
38 namespace ue2 {
39 
40 struct ParseMode;
41 
42 class ComponentEUS : public Component {
43     friend class DumpVisitor;
44     friend class UnsupportedVisitor;
45 public:
46     ComponentEUS(u32 loc, const ParseMode &mode);
47     ~ComponentEUS() override;
48     ComponentEUS *clone() const override;
49 
accept(ComponentVisitor & v)50     Component *accept(ComponentVisitor &v) override {
51         Component *c = v.visit(this);
52         v.post(this);
53         return c;
54     }
55 
accept(ConstComponentVisitor & v)56     void accept(ConstComponentVisitor &v) const override {
57         v.pre(*this);
58         v.during(*this);
59         v.post(*this);
60     }
61 
62     std::vector<PositionInfo> first() const override;
63     std::vector<PositionInfo> last() const override;
64 
empty()65     bool empty() const override { return false; }
66 
67     void notePositions(GlushkovBuildState &bs) override;
buildFollowSet(GlushkovBuildState &,const std::vector<PositionInfo> &)68     void buildFollowSet(GlushkovBuildState &,
69                         const std::vector<PositionInfo> &) override {
70         // all follow set construction is handled by firsts/lasts
71         return;
72     }
73 
74 private:
75     u32 loc;
76     bool utf8;
77     Position position;
78 
ComponentEUS(const ComponentEUS & other)79     ComponentEUS(const ComponentEUS &other)
80         : Component(other), loc(other.loc), utf8(other.utf8),
81           position(other.position) {}
82 };
83 
84 } // namespace ue2
85 
86 #endif
87