Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 47 insertions, 0 deletions

diff --git a/compilerplugins/clang/test/expressionalwayszero.cxx b/compilerplugins/clang/test/expressionalwayszero.cxx
new file mode 100644
index 000000000..23d3e2652
--- /dev/null
+++ b/compilerplugins/clang/test/expressionalwayszero.cxx
@@ -0,0 +1,47 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <o3tl/typed_flags_set.hxx>
+
+constexpr auto ONE = 1;
+constexpr auto TWO = 2;
+
+enum class Enum1 {
+    ONE = 1,
+    TWO = 2,
+};
+namespace o3tl {
+    template<> struct typed_flags<Enum1> : is_typed_flags<Enum1, 0x3> {};
+}
+
+enum class Enum2 {
+    ZERO = 0,
+    ONE = 1,
+    TWO = 2,
+};
+namespace o3tl {
+    template<> struct typed_flags<Enum2> : is_typed_flags<Enum2, 0x3> {};
+}
+
+int main()
+{
+    auto v1 = ONE & TWO; // expected-error {{expression always evaluates to zero, lhs=1 rhs=2 [loplugin:expressionalwayszero]}}
+    (void)v1;
+    auto v2 = Enum1::ONE & Enum1::TWO; // expected-error {{expression always evaluates to zero, lhs=1 rhs=2 [loplugin:expressionalwayszero]}}
+    (void)v2;
+
+    auto v3 = Enum2::ONE;
+    auto v4 = v3 & Enum2::ZERO; // expected-error {{expression always evaluates to zero, lhs=unknown rhs=0 [loplugin:expressionalwayszero]}}
+    (void)v4;
+
+    auto v5 = Enum2::ONE;
+    v5 &= Enum2::ZERO; // expected-error {{expression always evaluates to zero, lhs=unknown rhs=0 [loplugin:expressionalwayszero]}}
+    (void)v5;
+}
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */