Introduce a new QStringBuilder helper class to speed up building strings

from smaller chunks using expression templates.

Simple test and benchmark included, the class is not yet complete.

tests/auto/qstringbuilder/qstringbuilder.pro

@@ -0,0 +1,11 @@
+load(qttest_p4)
+SOURCES  += tst_qstringbuilder.cpp
+
+QT -= gui
+
+QT = core
+
+DEFINES += QT_NO_CAST_TO_ASCII
+
+
+

tests/auto/qstringbuilder/tst_qstringbuilder.cpp

@@ -0,0 +1,48 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+****************************************************************************/
+
+#include <QtTest/QtTest>
+#include "../../../src/libs/utils/qstringbuilder.h"
+
+//TESTED_CLASS=QStringBuilder
+//TESTED_FILES=qstringbuilder.h
+
+class tst_QStringBuilder : public QObject
+{
+    Q_OBJECT
+
+public:
+    tst_QStringBuilder();
+    ~tst_QStringBuilder() {}
+
+public slots:
+    void init() {}
+    void cleanup() {}
+
+private slots:
+    void operator_percent();
+};
+
+
+tst_QStringBuilder::tst_QStringBuilder()
+{
+    //QTextCodec::setCodecForLocale(QTextCodec::codecForName("ISO 8859-1"));
+}
+
+void tst_QStringBuilder::operator_percent()
+{
+    QLatin1Literal l1literal("a literal");
+    QLatin1String l1string("a literal");
+    QLatin1Char l1char('c');
+    QChar qchar(l1char);
+
+    QCOMPARE(QString(l1literal % l1literal), QString(l1string + l1string));
+}
+
+QTEST_APPLESS_MAIN(tst_QStringBuilder)
+
+#include "tst_qstringbuilder.moc"