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e6f907a155
Problem:
- Many constructors are defined as `{}` rather than using the ` =
default` compiler-provided constructor.
- Some types provide an implicit conversion operator from `nullptr_t`
instead of requiring the caller to default construct. This violates
the C++ Core Guidelines suggestion to declare single-argument
constructors explicit
(https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#c46-by-default-declare-single-argument-constructors-explicit).
Solution:
- Change default constructors to use the compiler-provided default
constructor.
- Remove implicit conversion operators from `nullptr_t` and change
usage to enforce type consistency without conversion.
89 lines
2.8 KiB
C++
89 lines
2.8 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/TestSuite.h>
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#include <AK/String.h>
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#include <AK/WeakPtr.h>
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#include <AK/Weakable.h>
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#ifdef __clang__
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# pragma clang diagnostic push
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# pragma clang diagnostic ignored "-Wunused-private-field"
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#endif
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class SimpleWeakable : public Weakable<SimpleWeakable>
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, public RefCounted<SimpleWeakable> {
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public:
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SimpleWeakable() = default;
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private:
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int m_member { 123 };
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};
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#ifdef __clang__
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# pragma clang diagnostic pop
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#endif
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TEST_CASE(basic_weak)
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{
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WeakPtr<SimpleWeakable> weak1;
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WeakPtr<SimpleWeakable> weak2;
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{
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auto simple = adopt(*new SimpleWeakable);
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weak1 = simple;
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weak2 = simple;
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EXPECT_EQ(weak1.is_null(), false);
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EXPECT_EQ(weak2.is_null(), false);
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EXPECT_EQ(weak1.strong_ref().ptr(), simple.ptr());
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EXPECT_EQ(weak1.strong_ref().ptr(), weak2.strong_ref().ptr());
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}
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EXPECT_EQ(weak1.is_null(), true);
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EXPECT_EQ(weak1.strong_ref().ptr(), nullptr);
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EXPECT_EQ(weak1.strong_ref().ptr(), weak2.strong_ref().ptr());
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}
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TEST_CASE(weakptr_move)
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{
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WeakPtr<SimpleWeakable> weak1;
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WeakPtr<SimpleWeakable> weak2;
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{
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auto simple = adopt(*new SimpleWeakable);
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weak1 = simple;
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weak2 = move(weak1);
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EXPECT_EQ(weak1.is_null(), true);
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EXPECT_EQ(weak2.is_null(), false);
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EXPECT_EQ(weak2.strong_ref().ptr(), simple.ptr());
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}
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EXPECT_EQ(weak2.is_null(), true);
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}
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TEST_MAIN(WeakPtr)
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