Clang: Add clang query

Clang query is mechanism to use AST matcher to search for code. Think
about regular expression but in the context of AST. So you get a semantic
search tool for C++.

Change-Id: I72e882c5b53a0c52f352a3664847c4c3e4f6fc2e
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

src/libs/clangbackendipc/sourcerangewithtextcontainer.h

@@ -0,0 +1,115 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** 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.
+**
+****************************************************************************/
+
+#pragma once
+
+#include <sourcerangecontainerv2.h>
+
+#include <utils/smallstringio.h>
+
+namespace ClangBackEnd {
+
+class SourceRangeWithTextContainer : V2::SourceRangeContainer
+{
+public:
+    SourceRangeWithTextContainer() = default;
+    SourceRangeWithTextContainer(uint fileHash,
+                                 uint startLine,
+                                 uint startColumn,
+                                 uint startOffset,
+                                 uint endLine,
+                                 uint endColumn,
+                                 uint endOffset,
+                                 Utils::SmallString &&text)
+        : V2::SourceRangeContainer(fileHash,
+                                   startLine,
+                                   startColumn,
+                                   startOffset,
+                                   endLine,
+                                   endColumn,
+                                   endOffset),
+          text_(std::move(text))
+    {}
+
+    SourceRangeWithTextContainer(V2::SourceRangeContainer &&base,
+                         Utils::SmallString &&text)
+        : V2::SourceRangeContainer(std::move(base)),
+          text_(std::move(text))
+    {
+    }
+
+    const Utils::SmallString &text() const
+    {
+        return text_;
+    }
+
+    using V2::SourceRangeContainer::start;
+    using V2::SourceRangeContainer::end;
+    using V2::SourceRangeContainer::fileHash;
+
+    friend QDataStream &operator<<(QDataStream &out, const SourceRangeWithTextContainer &container)
+    {
+        out << container.base();
+        out << container.text_;
+
+        return out;
+    }
+
+    friend QDataStream &operator>>(QDataStream &in, SourceRangeWithTextContainer &container)
+    {
+        in >> container.base();
+        in >> container.text_;
+
+        return in;
+    }
+
+    friend bool operator==(const SourceRangeWithTextContainer &first,
+                           const SourceRangeWithTextContainer &second)
+    {
+        return first.base() == second.base() && first.text_ == second.text_;
+    }
+
+    V2::SourceRangeContainer &base()
+    {
+        return *this;
+    }
+
+    const V2::SourceRangeContainer &base() const
+    {
+        return *this;
+    }
+
+    SourceRangeWithTextContainer clone() const
+    {
+        return SourceRangeWithTextContainer(base().clone(), text_.clone());
+    }
+
+private:
+    Utils::SmallString text_;
+};
+
+CMBIPC_EXPORT QDebug operator<<(QDebug debug, const SourceRangeWithTextContainer &container);
+void PrintTo(const SourceRangeWithTextContainer &container, ::std::ostream* os);
+} // namespace ClangBackEnd