uic: use a real ordered set

... instead of QMap<Key, bool>. Since Qt doesn't have such
a container, use std::set instead, which also simplifies
some code, in particular, because, unlike the Qt containers,
it does the right thing on attempted duplicate insertion:
nothing.

Saves 6.5KiB in text size (1.1% of total) on optimized
GCC 5.3 Linux AMD64 builds.

Change-Id: I9578a9a58c1c06abe58f22a5b6127d43c2f4be12
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>

1 files changed, 3 insertions, 1 deletions

diff --git a/src/tools/uic/cpp/cppwriteincludes.h b/src/tools/uic/cpp/cppwriteincludes.h
index 397c6a26e1..7a6a499536 100644
--- a/src/tools/uic/cpp/cppwriteincludes.h
+++ b/src/tools/uic/cpp/cppwriteincludes.h
@@ -35,6 +35,8 @@
 #include <qset.h>
 #include <qstring.h>
 
+#include <set>
+
 QT_BEGIN_NAMESPACE
 
 class QTextStream;
@@ -72,7 +74,7 @@ private:
     void add(const QString &className, bool determineHeader = true, const QString &header = QString(), bool global = false);
 
 private:
-    typedef QMap<QString, bool> OrderedSet;
+    typedef std::set<QString> OrderedSet;
     void insertIncludeForClass(const QString &className, QString header = QString(), bool global = false);
     void insertInclude(const QString &header, bool global);
     void writeHeaders(const OrderedSet &headers, bool global);