| 1 | // Copyright (C) 2016 The Qt Company Ltd. |
|---|---|
| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0 |
| 3 | |
| 4 | #ifndef RECOGNIZER_H |
| 5 | #define RECOGNIZER_H |
| 6 | |
| 7 | #include "grammar_p.h" |
| 8 | |
| 9 | #include "lalr.h" |
| 10 | |
| 11 | #include <QtCore/qstring.h> |
| 12 | #include <QtCore/qfile.h> |
| 13 | #include <QtCore/qtextstream.h> |
| 14 | |
| 15 | #include <cstdlib> |
| 16 | |
| 17 | class Recognizer: protected grammar |
| 18 | { |
| 19 | public: |
| 20 | Recognizer (Grammar *grammar, bool no_lines); |
| 21 | ~Recognizer(); |
| 22 | |
| 23 | bool parse (const QString &input_file = QString ()); |
| 24 | |
| 25 | inline QString decls () const { return _M_decls; } |
| 26 | inline QString impls () const { return _M_impls; } |
| 27 | |
| 28 | protected: |
| 29 | inline void reallocateStack (); |
| 30 | |
| 31 | inline QString &sym (int index) |
| 32 | { return sym_stack [tos + index - 1]; } |
| 33 | |
| 34 | protected: // scanner |
| 35 | int nextToken(); |
| 36 | |
| 37 | inline void inp () |
| 38 | { |
| 39 | if (_M_currentChar != _M_lastChar) |
| 40 | { |
| 41 | ch = *_M_currentChar++; |
| 42 | |
| 43 | if (ch == u'\n') |
| 44 | ++_M_line; |
| 45 | } |
| 46 | else |
| 47 | ch = QChar(); |
| 48 | } |
| 49 | |
| 50 | QString expand (const QString &text) const; |
| 51 | |
| 52 | protected: |
| 53 | // recognizer |
| 54 | int tos; |
| 55 | int stack_size; |
| 56 | QList<QString> sym_stack; |
| 57 | int *state_stack; |
| 58 | |
| 59 | QString _M_contents; |
| 60 | QString::const_iterator _M_firstChar; |
| 61 | QString::const_iterator _M_lastChar; |
| 62 | QString::const_iterator _M_currentChar; |
| 63 | |
| 64 | // scanner |
| 65 | QChar ch; |
| 66 | int _M_line; |
| 67 | int _M_action_line; |
| 68 | Grammar *_M_grammar; |
| 69 | RulePointer _M_current_rule; |
| 70 | QString _M_input_file; |
| 71 | |
| 72 | QString _M_decls; |
| 73 | QString _M_impls; |
| 74 | QString _M_current_value; |
| 75 | bool _M_no_lines; |
| 76 | }; |
| 77 | |
| 78 | #endif // RECOGNIZER_H |
| 79 |