From c0c6dd2b022cfd667f32b8a48bcac86ac07d3880 Mon Sep 17 00:00:00 2001
From: Olivier Goffart <olivier.goffart@nokia.com>
Date: Wed, 6 Jul 2011 16:37:14 +0200
Subject: Use Q_DECL_CONSTEXPR in QFlags

Change-Id: I851e0b1c3f80a7b33a38cb1ab2665dc0f3c73adc
Reviewed-on: http://codereview.qt.nokia.com/1248
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Gabriel de Dietrich <gabriel.dietrich-de@nokia.com>
---
 tests/auto/qflags/tst_qflags.cpp | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

(limited to 'tests/auto')

diff --git a/tests/auto/qflags/tst_qflags.cpp b/tests/auto/qflags/tst_qflags.cpp
index 87025b6da2..85e64a6d63 100644
--- a/tests/auto/qflags/tst_qflags.cpp
+++ b/tests/auto/qflags/tst_qflags.cpp
@@ -47,6 +47,7 @@ private slots:
     void testFlag() const;
     void testFlagZeroFlag() const;
     void testFlagMultiBits() const;
+    void constExpr();
 };
 
 void tst_QFlags::testFlag() const
@@ -96,5 +97,32 @@ void tst_QFlags::testFlagMultiBits() const
     }
 }
 
+template <int N, typename T> bool verifyConstExpr(T n) { return n == N; }
+
+void tst_QFlags::constExpr()
+{
+#ifdef Q_COMPILER_CONSTEXPR
+    Qt::MouseButtons btn = Qt::LeftButton | Qt::RightButton;
+    switch (btn) {
+        case Qt::LeftButton: QVERIFY(false); break;
+        case Qt::RightButton: QVERIFY(false); break;
+        case Qt::LeftButton | Qt::RightButton: QVERIFY(true); break;
+        default: QVERIFY(false);
+    }
+
+    QVERIFY(verifyConstExpr<(Qt::LeftButton | Qt::RightButton) & Qt::LeftButton>(Qt::LeftButton));
+    QVERIFY(verifyConstExpr<(Qt::LeftButton | Qt::RightButton) & Qt::MiddleButton>(0));
+    QVERIFY(verifyConstExpr<(Qt::LeftButton | Qt::RightButton) | Qt::MiddleButton>(Qt::LeftButton | Qt::RightButton | Qt::MiddleButton));
+    QVERIFY(verifyConstExpr<~(Qt::LeftButton | Qt::RightButton)>(~(Qt::LeftButton | Qt::RightButton)));
+    QVERIFY(verifyConstExpr<Qt::MouseButtons(Qt::LeftButton) ^ Qt::RightButton>(Qt::LeftButton ^ Qt::RightButton));
+    QVERIFY(verifyConstExpr<Qt::MouseButtons(0)>(0));
+    QVERIFY(verifyConstExpr<Qt::MouseButtons(Qt::RightButton) & 0xff>(Qt::RightButton));
+    QVERIFY(verifyConstExpr<Qt::MouseButtons(Qt::RightButton) | 0xff>(0xff));
+
+    QVERIFY(!verifyConstExpr<Qt::RightButton>(!Qt::MouseButtons(Qt::LeftButton)));
+#endif
+}
+
+
 QTEST_MAIN(tst_QFlags)
 #include "tst_qflags.moc"
-- 
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