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79 lines
1.8 KiB
C++
79 lines
1.8 KiB
C++
// Copyright (C) 2016 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
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#ifndef RE2NFA_H
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#define RE2NFA_H
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#include "nfa.h"
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#include <QSet>
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class RE2NFA
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{
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public:
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RE2NFA(const QMap<QString, NFA> ¯os, const QSet<InputType> &maxInputSet, Qt::CaseSensitivity cs);
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NFA parse(const QString &expression, int *errorColumn = 0);
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private:
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NFA parseExpr();
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NFA parseBranch();
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NFA parsePiece();
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NFA parseAtom();
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NFA parseMaybeQuantifier(const NFA &nfa);
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NFA parseSet();
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NFA parseSet2();
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NFA createCharNFA();
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private:
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friend class RegExpTokenizer;
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enum Token {
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TOK_INVALID,
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TOK_STRING,
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TOK_LBRACE, // {
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TOK_RBRACE, // }
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TOK_LBRACKET, // [
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TOK_RBRACKET, // ]
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TOK_LPAREN, // (
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TOK_RPAREN, // )
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TOK_COMMA,
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TOK_STAR,
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TOK_OR,
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TOK_QUESTION,
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TOK_DOT,
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TOK_PLUS,
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TOK_SEQUENCE,
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TOK_QUOTED_STRING
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};
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struct Symbol
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{
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inline Symbol() : token(TOK_INVALID), column(-1) {}
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inline Symbol(Token t, const QString &l = QString()) : token(t), lexem(l), column(-1) {}
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Token token;
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QString lexem;
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int column;
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};
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inline bool hasNext() const { return index < symbols.count(); }
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inline Token next() { return symbols.at(index++).token; }
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bool next(Token t);
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bool test(Token t);
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inline void prev() { index--; }
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inline const Symbol &symbol() const { return symbols.at(index - 1); }
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QString lexemUntil(Token t);
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void tokenize(const QString &input);
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QMap<QString, NFA> macros;
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QList<Symbol> symbols;
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int index;
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int errorColumn;
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const QSet<InputType> maxInputSet;
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Qt::CaseSensitivity caseSensitivity;
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};
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#endif // RE2NFA_H
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