142 lines
3.4 KiB
C++
142 lines
3.4 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop version of Telegram messaging app, see https://telegram.org
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Telegram Desktop is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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It is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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In addition, as a special exception, the copyright holders give permission
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to link the code of portions of this program with the OpenSSL library.
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Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
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Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
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*/
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#include "catch.hpp"
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#include "base/flags.h"
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namespace MethodNamespace {
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template <typename Enum>
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void TestFlags(Enum a, Enum b, Enum c) {
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auto abc = a | b;
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abc |= c;
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auto test = abc != a;
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CHECK(abc != a);
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CHECK(abc != (a | b));
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CHECK((abc & a) == a);
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CHECK((abc & b) == b);
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CHECK((abc & c) == c);
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CHECK((abc & ~a) == (b | c));
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CHECK((abc & ~(b | c)) == a);
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CHECK((abc ^ a) == (abc & ~a));
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auto another = a | b;
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another |= c;
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CHECK(abc == another);
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another &= ~b;
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CHECK(another == (a | c));
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another ^= a;
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CHECK(another == c);
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another = 0;
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another = nullptr;
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auto is_zero = ((another & abc) == 0);
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CHECK(is_zero);
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CHECK(!(another & abc));
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auto more = a | another;
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auto just = a | 0;
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CHECK(more == just);
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CHECK(just);
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}
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} // namespace MethodNamespace
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namespace FlagsNamespace {
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enum class Flag : int {
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one = (1 << 0),
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two = (1 << 1),
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three = (1 << 2),
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};
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inline constexpr auto is_flag_type(Flag) { return true; }
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class Class {
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public:
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enum class Public : long {
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one = (1 << 2),
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two = (1 << 1),
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three = (1 << 0),
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};
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friend inline constexpr auto is_flag_type(Public) { return true; }
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static void TestPrivate();
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private:
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enum class Private : long {
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one = (1 << 0),
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two = (1 << 1),
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three = (1 << 2),
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};
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friend inline constexpr auto is_flag_type(Private) { return true; }
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};
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void Class::TestPrivate() {
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MethodNamespace::TestFlags(Private::one, Private::two, Private::three);
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}
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} // namespace FlagsNamespace
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namespace ExtendedNamespace {
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enum class Flag : int {
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one = (1 << 3),
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two = (1 << 4),
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three = (1 << 5),
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};
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} // namespace ExtendedNamespace
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namespace base {
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template<>
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struct extended_flags<ExtendedNamespace::Flag> {
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using type = FlagsNamespace::Flag;
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};
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} // namespace base
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TEST_CASE("flags operators on scoped enums", "[flags]") {
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SECTION("testing non-member flags") {
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MethodNamespace::TestFlags(
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FlagsNamespace::Flag::one,
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FlagsNamespace::Flag::two,
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FlagsNamespace::Flag::three);
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}
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SECTION("testing public member flags") {
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MethodNamespace::TestFlags(
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FlagsNamespace::Class::Public::one,
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FlagsNamespace::Class::Public::two,
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FlagsNamespace::Class::Public::three);
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}
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SECTION("testing private member flags") {
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FlagsNamespace::Class::TestPrivate();
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}
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SECTION("testing extended flags") {
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MethodNamespace::TestFlags(
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ExtendedNamespace::Flag::one,
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ExtendedNamespace::Flag::two,
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ExtendedNamespace::Flag::three);
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auto onetwo = FlagsNamespace::Flag::one | ExtendedNamespace::Flag::two;
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auto twoone = ExtendedNamespace::Flag::two | FlagsNamespace::Flag::one;
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CHECK(onetwo == twoone);
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}
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}
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