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 Word Boundary Assertion (\\b or \\B) |
31 | */ |
32 | |
33 | #ifndef _RE_COMPONENTWORDBOUNDARY_H_ |
34 | #define _RE_COMPONENTWORDBOUNDARY_H_ |
35 | |
36 | #include "Component.h" |
37 | #include "position.h" |
38 | |
39 | namespace ue2 { |
40 | |
41 | struct ParseMode; |
42 | |
43 | /** \brief Encapsulates a positive (\\b) or negative (\\B) word boundary |
44 | * assertion. */ |
45 | class ComponentWordBoundary : public Component { |
46 | friend class DumpVisitor; |
47 | friend class PrintVisitor; |
48 | friend class UnsupportedVisitor; |
49 | public: |
50 | ComponentWordBoundary(u32 loc, bool negated, const ParseMode &mode); |
51 | ~ComponentWordBoundary() override; |
52 | ComponentWordBoundary *clone() const override; |
53 | |
54 | Component *accept(ComponentVisitor &v) override { |
55 | Component *c = v.visit(this); |
56 | v.post(this); |
57 | return c; |
58 | } |
59 | |
60 | void accept(ConstComponentVisitor &v) const override { |
61 | v.pre(*this); |
62 | v.during(*this); |
63 | v.post(*this); |
64 | } |
65 | |
66 | std::vector<PositionInfo> first() const override; |
67 | std::vector<PositionInfo> last() const override; |
68 | bool empty() const override; |
69 | bool repeatable() const override; |
70 | void notePositions(GlushkovBuildState &bs) override; |
71 | void buildFollowSet(GlushkovBuildState &bs, |
72 | const std::vector<PositionInfo> &lastPos) override; |
73 | |
74 | void setPrefilter(bool p) { prefilter = p; } |
75 | |
76 | private: |
77 | u32 loc; //!< location in pattern for error reporting. |
78 | Position position; |
79 | bool negated; |
80 | bool ucp; |
81 | bool prefilter; //!< set by PrefilterVisitor, this is ugly |
82 | |
83 | ComponentWordBoundary(const ComponentWordBoundary &other) |
84 | : Component(other), loc(other.loc), position(other.position), |
85 | negated(other.negated), ucp(other.ucp), prefilter(other.prefilter) {} |
86 | }; |
87 | |
88 | } // namespace ue2 |
89 | |
90 | #endif |
91 | |