Utils: Add simple LineColumn class

There are many places where line and column are returned by writable
parameters which is not so readable. This simple class makes it easier
to return line and column as one value.

Change-Id: I4836088e76d0ee5decd713ab616fde2f8a97c74b
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/libs/utils/linecolumn.h

@@ -0,0 +1,44 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 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
+
+class LineColumn
+{
+public:
+    constexpr
+    LineColumn(int line, int column)
+        : line(line),
+          column(column)
+    {}
+
+    bool isValid() const
+    {
+        return line >= 0 && column >= 0;
+    }
+
+    int line = -1;
+    int column = -1;
+};

src/libs/utils/utils-lib.pri

@@ -254,7 +254,8 @@ HEADERS += \
     $$PWD/textutils.h \
     $$PWD/predicates.h \
     $$PWD/url.h \
-    $$PWD/filecrumblabel.h
+    $$PWD/filecrumblabel.h \
+    $$PWD/linecolumn.h
 
 FORMS += $$PWD/filewizardpage.ui \
     $$PWD/projectintropage.ui \

src/libs/utils/utils.qbs

@@ -135,6 +135,7 @@ Project {
             "itemviews.h",
             "json.cpp",
             "json.h",
+            "linecolumn.h",
             "linecolumnlabel.cpp",
             "linecolumnlabel.h",
             "listutils.h",