Initial import

shared/cplusplus/Lexer.h

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+/***************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact:  Qt Software Information (qt-info@nokia.com)
+**
+** 
+** Non-Open Source Usage  
+** 
+** Licensees may use this file in accordance with the Qt Beta Version
+** License Agreement, Agreement version 2.2 provided with the Software or,
+** alternatively, in accordance with the terms contained in a written
+** agreement between you and Nokia.  
+** 
+** GNU General Public License Usage 
+** 
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License versions 2.0 or 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the packaging
+** of this file.  Please review the following information to ensure GNU
+** General Public Licensing requirements will be met:
+**
+** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt GPL Exception version
+** 1.2, included in the file GPL_EXCEPTION.txt in this package.  
+** 
+***************************************************************************/
+// Copyright (c) 2008 Roberto Raggi <roberto.raggi@gmail.com>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#ifndef CPLUSPLUS_LEXER_H
+#define CPLUSPLUS_LEXER_H
+
+#include "CPlusPlusForwardDeclarations.h"
+#include "Token.h"
+
+CPLUSPLUS_BEGIN_HEADER
+CPLUSPLUS_BEGIN_NAMESPACE
+
+class CPLUSPLUS_EXPORT Lexer
+{
+    Lexer(const Lexer &other);
+    void operator =(const Lexer &other);
+
+public:
+    enum State {
+        DefaultState,
+        MultiLineCommentState
+    };
+
+    Lexer(TranslationUnit *unit);
+    Lexer(const char *firstChar, const char *lastChar);
+    ~Lexer();
+
+    Control *control() const;
+    TranslationUnit *translationUnit() const;
+
+    bool qtMocRunEnabled() const;
+    void setQtMocRunEnabled(bool onoff);
+
+    void scan(Token *tok);
+
+    inline void operator()(Token *tok)
+    { scan(tok); }
+
+    unsigned tokenOffset() const;
+    unsigned tokenLength() const;
+    const char *tokenBegin() const;
+    const char *tokenEnd() const;
+    unsigned currentLine() const;
+
+    bool scanCommentTokens() const;
+    void setScanCommentTokens(bool onoff);
+
+    bool scanKeywords() const;
+    void setScanKeywords(bool onoff);
+
+    bool scanAngleStringLiteralTokens() const;
+    void setScanAngleStringLiteralTokens(bool onoff);
+
+    void setStartWithNewline(bool enabled);
+
+    int state() const;
+    void setState(int state);
+
+    bool isIncremental() const;
+    void setIncremental(bool isIncremental);
+
+private:
+    void scan_helper(Token *tok);
+    void setSource(const char *firstChar, const char *lastChar);
+    static int classify(const char *string, int length, bool q);
+
+    inline void yyinp()
+    {
+        if (++_currentChar == _lastChar)
+            _yychar = 0;
+        else {
+            _yychar = *_currentChar;
+            if (_yychar == '\n')
+                pushLineStartOffset();
+        }
+    }
+
+    void pushLineStartOffset();
+
+private:
+    TranslationUnit *_translationUnit;
+    const char *_firstChar;
+    const char *_currentChar;
+    const char *_lastChar;
+    const char *_tokenStart;
+    char _yychar;
+    int _state;
+    union {
+        unsigned _flags;
+        struct {
+            unsigned _isIncremental: 1;
+            unsigned _scanCommentTokens: 1;
+            unsigned _scanKeywords: 1;
+            unsigned _scanAngleStringLiteralTokens: 1;
+            unsigned _qtMocRunEnabled: 1;
+        };
+    };
+    unsigned _currentLine;
+};
+
+CPLUSPLUS_END_NAMESPACE
+CPLUSPLUS_END_HEADER
+
+#endif // CPLUSPLUS_LEXER_H