1/*
2 * Copyright (c) 2015-2016, 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 Conditional reference.
31 */
32
33#ifndef PARSER_COMPONENTCONDREFERENCE_H_
34#define PARSER_COMPONENTCONDREFERENCE_H_
35
36#include "ComponentSequence.h"
37
38#include <memory>
39#include <string>
40
41namespace ue2 {
42
43class ComponentCondReference : public ComponentSequence {
44 friend class DumpVisitor;
45 friend class PrefilterVisitor;
46 friend class ReferenceVisitor;
47 friend class PrintVisitor;
48public:
49 explicit ComponentCondReference(unsigned ref);
50 explicit ComponentCondReference(const std::string &name);
51 explicit ComponentCondReference(std::unique_ptr<Component> c);
52
53 ~ComponentCondReference() override;
54 ComponentCondReference *clone() const override;
55 Component *accept(ComponentVisitor &v) override;
56 void accept(ConstComponentVisitor &v) const override;
57
58 void addAlternation() override;
59
60 std::vector<PositionInfo> first() const override;
61 std::vector<PositionInfo> last() const override;
62
63 bool empty() const override;
64 void notePositions(GlushkovBuildState &bs) override;
65 void buildFollowSet(GlushkovBuildState &bs,
66 const std::vector<PositionInfo> &lastPos) override;
67 bool repeatable() const override;
68
69private:
70 ComponentCondReference(const ComponentCondReference &other);
71
72 enum Condition {
73 CONDITION_NUMBER,
74 CONDITION_NAME,
75 CONDITION_ASSERTION
76 };
77
78 enum Condition kind;
79
80 unsigned ref_id;
81 std::string ref_name;
82 std::unique_ptr<Component> assertion;
83
84 /** True if an alternation has been added, which means we have both a YES
85 * and a NO branch. */
86 bool hasBothBranches;
87};
88
89} // namespace ue2
90
91#endif // PARSER_COMPONENTCONDREFERENCE_H_
92