ClangCodeModel: Highlight Q_PROPERTY declarations with clangd

We re-use the moc parser for this purpose.

Change-Id: Ib0ef4f727d1f0b862a202a95a3ae9c551cb502a5
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: David Schulz <david.schulz@qt.io>

src/plugins/clangcodemodel/moc/parser.h

@@ -0,0 +1,110 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the tools applications of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef PARSER_H
+#define PARSER_H
+
+#include "symbols.h"
+
+#include <stack>
+
+QT_BEGIN_NAMESPACE
+
+struct MocParseException {};
+
+class Parser
+{
+public:
+    Parser():index(0), displayWarnings(true), displayNotes(true) {}
+    Symbols symbols;
+    int index;
+    bool displayWarnings;
+    bool displayNotes;
+
+    struct IncludePath
+    {
+        inline explicit IncludePath(const QByteArray &_path)
+            : path(_path), isFrameworkPath(false) {}
+        QByteArray path;
+        bool isFrameworkPath;
+    };
+    QList<IncludePath> includes;
+
+    std::stack<QByteArray, QByteArrayList> currentFilenames;
+
+    inline bool hasNext() const { return (index < symbols.size()); }
+    inline Token next() { if (index >= symbols.size()) return NOTOKEN; return symbols.at(index++).token; }
+    inline Token peek() { if (index >= symbols.size()) return NOTOKEN; return symbols.at(index).token; }
+    bool test(Token);
+    void next(Token);
+    void next(Token, const char *msg);
+    inline void prev() {--index;}
+    inline Token lookup(int k = 1);
+    inline const Symbol &symbol_lookup(int k = 1) { return symbols.at(index-1+k);}
+    inline Token token() { return symbols.at(index-1).token;}
+    inline QByteArray lexem() { return symbols.at(index-1).lexem();}
+    inline QByteArray unquotedLexem() { return symbols.at(index-1).unquotedLexem();}
+    inline const Symbol &symbol() { return symbols.at(index-1);}
+
+    Q_NORETURN void error(int rollback);
+    Q_NORETURN void error(const char *msg = nullptr);
+    void warning(const char * = nullptr);
+    void note(const char * = nullptr);
+
+};
+
+inline bool Parser::test(Token token)
+{
+    if (index < symbols.size() && symbols.at(index).token == token) {
+        ++index;
+        return true;
+    }
+    return false;
+}
+
+inline Token Parser::lookup(int k)
+{
+    const int l = index - 1 + k;
+    return l < symbols.size() ? symbols.at(l).token : NOTOKEN;
+}
+
+inline void Parser::next(Token token)
+{
+    if (!test(token))
+        error();
+}
+
+inline void Parser::next(Token token, const char *msg)
+{
+    if (!test(token))
+        error(msg);
+}
+
+QT_END_NAMESPACE
+
+#endif