diff options
Diffstat (limited to 'compilerplugins/clang/test/expressionalwayszero.cxx')
| -rw-r--r-- | compilerplugins/clang/test/expressionalwayszero.cxx | 47 |
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 0000000000..23d3e2652c --- /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: */ |