Sqlite: Improve SqliteStatement

There are now only value and values methods. value returns an optional
and values are returning a vector. The result value count has now be
specified instead of the result value list.

Change-Id: I17a0741d5e838b4bf4b9486825c870ada1722584
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

src/plugins/clangrefactoring/sourcelocations.h

@@ -39,24 +39,25 @@ class SourceLocations
 public:
     struct Location
     {
-      qint64 sourceId;
-      qint64 line;
-      qint64 column;
+        Location(qint64 sourceId, qint64 line, qint64 column)
+            : sourceId(sourceId), line(line), column(column)
+        {}
+
+        qint64 sourceId;
+        qint64 line;
+        qint64 column;
     };
 
     struct Source
     {
+        Source(qint64 sourceId, Utils::PathString &&sourcePath)
+            : sourceId(sourceId), sourcePath(std::move(sourcePath))
+        {}
+
         qint64 sourceId;
         Utils::PathString sourcePath;
     };
 
-    enum LocationGetter
-    {
-        SourceId = 0,
-        Line,
-        Column
-    };
-
     std::vector<Location> locations;
     std::unordered_map<qint64, Utils::PathString> sources;
 };