551 lines
16 KiB
C++
551 lines
16 KiB
C++
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///////////////////////////////////////////////////////////////////////////////
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//
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// Copyright (c) 2015 Microsoft Corporation. All rights reserved.
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//
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// This code is licensed under the MIT License (MIT).
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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//
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///////////////////////////////////////////////////////////////////////////////
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#include <gtest/gtest.h>
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#include <gsl/pointers> // for not_null, operator<, operator<=, operator>
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#include <algorithm> // for addressof
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#include <memory> // for shared_ptr, make_shared, operator<, opera...
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#include <sstream> // for operator<<, ostringstream, basic_ostream:...
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#include <stdint.h> // for uint16_t
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#include <string> // for basic_string, operator==, string, operator<<
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#include <typeinfo> // for type_info
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using namespace gsl;
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namespace
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{
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static constexpr char deathstring[] = "Expected Death";
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} //namespace
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struct MyBase
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{
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};
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struct MyDerived : public MyBase
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{
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};
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struct Unrelated
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{
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};
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// stand-in for a user-defined ref-counted class
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template <typename T>
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struct RefCounted
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{
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RefCounted(T* p) : p_(p) {}
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operator T*() { return p_; }
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T* p_;
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};
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// user defined smart pointer with comparison operators returning non bool value
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template <typename T>
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struct CustomPtr
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{
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CustomPtr(T* p) : p_(p) {}
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operator T*() { return p_; }
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bool operator!=(std::nullptr_t) const { return p_ != nullptr; }
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T* p_ = nullptr;
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};
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template <typename T, typename U>
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std::string operator==(CustomPtr<T> const& lhs, CustomPtr<U> const& rhs)
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{
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GSL_SUPPRESS(type.1) // NO-FORMAT: attribute
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return reinterpret_cast<const void*>(lhs.p_) == reinterpret_cast<const void*>(rhs.p_) ? "true"
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: "false";
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}
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template <typename T, typename U>
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std::string operator!=(CustomPtr<T> const& lhs, CustomPtr<U> const& rhs)
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{
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GSL_SUPPRESS(type.1) // NO-FORMAT: attribute
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return reinterpret_cast<const void*>(lhs.p_) != reinterpret_cast<const void*>(rhs.p_) ? "true"
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: "false";
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}
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template <typename T, typename U>
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std::string operator<(CustomPtr<T> const& lhs, CustomPtr<U> const& rhs)
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{
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GSL_SUPPRESS(type.1) // NO-FORMAT: attribute
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return reinterpret_cast<const void*>(lhs.p_) < reinterpret_cast<const void*>(rhs.p_) ? "true"
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: "false";
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}
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template <typename T, typename U>
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std::string operator>(CustomPtr<T> const& lhs, CustomPtr<U> const& rhs)
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{
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GSL_SUPPRESS(type.1) // NO-FORMAT: attribute
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return reinterpret_cast<const void*>(lhs.p_) > reinterpret_cast<const void*>(rhs.p_) ? "true"
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: "false";
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}
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template <typename T, typename U>
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std::string operator<=(CustomPtr<T> const& lhs, CustomPtr<U> const& rhs)
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{
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GSL_SUPPRESS(type.1) // NO-FORMAT: attribute
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return reinterpret_cast<const void*>(lhs.p_) <= reinterpret_cast<const void*>(rhs.p_) ? "true"
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: "false";
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}
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template <typename T, typename U>
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std::string operator>=(CustomPtr<T> const& lhs, CustomPtr<U> const& rhs)
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{
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GSL_SUPPRESS(type.1) // NO-FORMAT: attribute
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return reinterpret_cast<const void*>(lhs.p_) >= reinterpret_cast<const void*>(rhs.p_) ? "true"
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: "false";
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}
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struct NonCopyableNonMovable
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{
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NonCopyableNonMovable() = default;
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NonCopyableNonMovable(const NonCopyableNonMovable&) = delete;
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NonCopyableNonMovable& operator=(const NonCopyableNonMovable&) = delete;
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NonCopyableNonMovable(NonCopyableNonMovable&&) = delete;
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NonCopyableNonMovable& operator=(NonCopyableNonMovable&&) = delete;
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};
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GSL_SUPPRESS(f.4) // NO-FORMAT: attribute
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bool helper(not_null<int*> p) { return *p == 12; }
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GSL_SUPPRESS(f.4) // NO-FORMAT: attribute
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bool helper_const(not_null<const int*> p) { return *p == 12; }
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int* return_pointer() { return nullptr; }
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TEST(notnull_tests, TestNotNullConstructors)
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{
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{
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#ifdef CONFIRM_COMPILATION_ERRORS
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not_null<int*> p = nullptr; // yay...does not compile!
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not_null<std::vector<char>*> p1 = 0; // yay...does not compile!
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not_null<int*> p2; // yay...does not compile!
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std::unique_ptr<int> up = std::make_unique<int>(120);
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not_null<int*> p3 = up;
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// Forbid non-nullptr assignable types
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not_null<std::vector<int>> f(std::vector<int>{1});
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not_null<int> z(10);
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not_null<std::vector<int>> y({1, 2});
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#endif
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}
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std::set_terminate([] {
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std::cerr << "Expected Death. TestNotNullConstructors";
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std::abort();
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});
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{
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// from shared pointer
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int i = 12;
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auto rp = RefCounted<int>(&i);
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not_null<int*> p(rp);
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EXPECT_TRUE(p.get() == &i);
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not_null<std::shared_ptr<int>> x(
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std::make_shared<int>(10)); // shared_ptr<int> is nullptr assignable
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int* pi = nullptr;
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EXPECT_DEATH((not_null<decltype(pi)>(pi)), deathstring);
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}
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{
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// from pointer to local
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int t = 42;
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not_null<int*> x = &t;
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helper(&t);
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helper_const(&t);
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EXPECT_TRUE(*x == 42);
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}
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{
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// from raw pointer
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// from not_null pointer
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int t = 42;
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int* p = &t;
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not_null<int*> x = p;
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helper(p);
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helper_const(p);
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helper(x);
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helper_const(x);
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EXPECT_TRUE(*x == 42);
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}
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{
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// from raw const pointer
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// from not_null const pointer
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int t = 42;
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const int* cp = &t;
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not_null<const int*> x = cp;
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helper_const(cp);
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helper_const(x);
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EXPECT_TRUE(*x == 42);
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}
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{
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// from not_null const pointer, using auto
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int t = 42;
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const int* cp = &t;
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auto x = not_null<const int*>{cp};
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EXPECT_TRUE(*x == 42);
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}
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{
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// from returned pointer
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EXPECT_DEATH(helper(return_pointer()), deathstring);
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EXPECT_DEATH(helper_const(return_pointer()), deathstring);
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}
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}
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template <typename T>
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void ostream_helper(T v)
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{
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not_null<T*> p(&v);
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{
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std::ostringstream os;
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std::ostringstream ref;
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os << static_cast<void*>(p);
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ref << static_cast<void*>(&v);
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EXPECT_TRUE(os.str() == ref.str());
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}
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{
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std::ostringstream os;
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std::ostringstream ref;
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os << *p;
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ref << v;
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EXPECT_TRUE(os.str() == ref.str());
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}
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}
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TEST(notnull_tests, TestNotNullostream)
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{
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ostream_helper<int>(17);
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ostream_helper<float>(21.5f);
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ostream_helper<double>(3.4566e-7);
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ostream_helper<char>('c');
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ostream_helper<uint16_t>(0x0123u);
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ostream_helper<const char*>("cstring");
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ostream_helper<std::string>("string");
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}
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TEST(notnull_tests, TestNotNullCasting)
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{
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MyBase base;
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MyDerived derived;
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Unrelated unrelated;
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not_null<Unrelated*> u{&unrelated};
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(void) u;
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not_null<MyDerived*> p{&derived};
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not_null<MyBase*> q(&base);
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q = p; // allowed with heterogeneous copy ctor
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EXPECT_TRUE(q == p);
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#ifdef CONFIRM_COMPILATION_ERRORS
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q = u; // no viable conversion possible between MyBase* and Unrelated*
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p = q; // not possible to implicitly convert MyBase* to MyDerived*
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not_null<Unrelated*> r = p;
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not_null<Unrelated*> s = reinterpret_cast<Unrelated*>(p);
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#endif
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not_null<Unrelated*> t(reinterpret_cast<Unrelated*>(p.get()));
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EXPECT_TRUE(reinterpret_cast<void*>(p.get()) == reinterpret_cast<void*>(t.get()));
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}
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TEST(notnull_tests, TestNotNullAssignment)
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{
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std::set_terminate([] {
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std::cerr << "Expected Death. TestNotNullAssignmentd";
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std::abort();
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});
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int i = 12;
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not_null<int*> p(&i);
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EXPECT_TRUE(helper(p));
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int* q = nullptr;
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EXPECT_DEATH(p = not_null<int*>(q), deathstring);
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}
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TEST(notnull_tests, TestNotNullRawPointerComparison)
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{
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int ints[2] = {42, 43};
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int* p1 = &ints[0];
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const int* p2 = &ints[1];
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using NotNull1 = not_null<decltype(p1)>;
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using NotNull2 = not_null<decltype(p2)>;
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EXPECT_TRUE((NotNull1(p1) == NotNull1(p1)) == true);
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EXPECT_TRUE((NotNull1(p1) == NotNull2(p2)) == false);
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EXPECT_TRUE((NotNull1(p1) != NotNull1(p1)) == false);
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EXPECT_TRUE((NotNull1(p1) != NotNull2(p2)) == true);
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EXPECT_TRUE((NotNull1(p1) < NotNull1(p1)) == false);
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EXPECT_TRUE((NotNull1(p1) < NotNull2(p2)) == (p1 < p2));
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EXPECT_TRUE((NotNull2(p2) < NotNull1(p1)) == (p2 < p1));
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EXPECT_TRUE((NotNull1(p1) > NotNull1(p1)) == false);
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EXPECT_TRUE((NotNull1(p1) > NotNull2(p2)) == (p1 > p2));
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EXPECT_TRUE((NotNull2(p2) > NotNull1(p1)) == (p2 > p1));
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EXPECT_TRUE((NotNull1(p1) <= NotNull1(p1)) == true);
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EXPECT_TRUE((NotNull1(p1) <= NotNull2(p2)) == (p1 <= p2));
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EXPECT_TRUE((NotNull2(p2) <= NotNull1(p1)) == (p2 <= p1));
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}
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TEST(notnull_tests, TestNotNullDereferenceOperator)
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{
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{
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auto sp1 = std::make_shared<NonCopyableNonMovable>();
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using NotNullSp1 = not_null<decltype(sp1)>;
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EXPECT_TRUE(typeid(*sp1) == typeid(*NotNullSp1(sp1)));
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EXPECT_TRUE(std::addressof(*NotNullSp1(sp1)) == std::addressof(*sp1));
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}
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{
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int ints[1] = {42};
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CustomPtr<int> p1(&ints[0]);
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using NotNull1 = not_null<decltype(p1)>;
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EXPECT_TRUE(typeid(*NotNull1(p1)) == typeid(*p1));
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EXPECT_TRUE(*NotNull1(p1) == 42);
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*NotNull1(p1) = 43;
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EXPECT_TRUE(ints[0] == 43);
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}
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{
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int v = 42;
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gsl::not_null<int*> p(&v);
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EXPECT_TRUE(typeid(*p) == typeid(*(&v)));
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*p = 43;
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EXPECT_TRUE(v == 43);
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}
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}
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TEST(notnull_tests, TestNotNullSharedPtrComparison)
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{
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auto sp1 = std::make_shared<int>(42);
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auto sp2 = std::make_shared<const int>(43);
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using NotNullSp1 = not_null<decltype(sp1)>;
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using NotNullSp2 = not_null<decltype(sp2)>;
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EXPECT_TRUE((NotNullSp1(sp1) == NotNullSp1(sp1)) == true);
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EXPECT_TRUE((NotNullSp1(sp1) == NotNullSp2(sp2)) == false);
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EXPECT_TRUE((NotNullSp1(sp1) != NotNullSp1(sp1)) == false);
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EXPECT_TRUE((NotNullSp1(sp1) != NotNullSp2(sp2)) == true);
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EXPECT_TRUE((NotNullSp1(sp1) < NotNullSp1(sp1)) == false);
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EXPECT_TRUE((NotNullSp1(sp1) < NotNullSp2(sp2)) == (sp1 < sp2));
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EXPECT_TRUE((NotNullSp2(sp2) < NotNullSp1(sp1)) == (sp2 < sp1));
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EXPECT_TRUE((NotNullSp1(sp1) > NotNullSp1(sp1)) == false);
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EXPECT_TRUE((NotNullSp1(sp1) > NotNullSp2(sp2)) == (sp1 > sp2));
|
||
|
|
EXPECT_TRUE((NotNullSp2(sp2) > NotNullSp1(sp1)) == (sp2 > sp1));
|
||
|
|
|
||
|
|
EXPECT_TRUE((NotNullSp1(sp1) <= NotNullSp1(sp1)) == true);
|
||
|
|
EXPECT_TRUE((NotNullSp1(sp1) <= NotNullSp2(sp2)) == (sp1 <= sp2));
|
||
|
|
EXPECT_TRUE((NotNullSp2(sp2) <= NotNullSp1(sp1)) == (sp2 <= sp1));
|
||
|
|
|
||
|
|
EXPECT_TRUE((NotNullSp1(sp1) >= NotNullSp1(sp1)) == true);
|
||
|
|
EXPECT_TRUE((NotNullSp1(sp1) >= NotNullSp2(sp2)) == (sp1 >= sp2));
|
||
|
|
EXPECT_TRUE((NotNullSp2(sp2) >= NotNullSp1(sp1)) == (sp2 >= sp1));
|
||
|
|
}
|
||
|
|
|
||
|
|
TEST(notnull_tests, TestNotNullCustomPtrComparison)
|
||
|
|
{
|
||
|
|
int ints[2] = {42, 43};
|
||
|
|
CustomPtr<int> p1(&ints[0]);
|
||
|
|
CustomPtr<const int> p2(&ints[1]);
|
||
|
|
|
||
|
|
using NotNull1 = not_null<decltype(p1)>;
|
||
|
|
using NotNull2 = not_null<decltype(p2)>;
|
||
|
|
|
||
|
|
EXPECT_TRUE((NotNull1(p1) == NotNull1(p1)) == "true");
|
||
|
|
EXPECT_TRUE((NotNull1(p1) == NotNull2(p2)) == "false");
|
||
|
|
|
||
|
|
EXPECT_TRUE((NotNull1(p1) != NotNull1(p1)) == "false");
|
||
|
|
EXPECT_TRUE((NotNull1(p1) != NotNull2(p2)) == "true");
|
||
|
|
|
||
|
|
EXPECT_TRUE((NotNull1(p1) < NotNull1(p1)) == "false");
|
||
|
|
EXPECT_TRUE((NotNull1(p1) < NotNull2(p2)) == (p1 < p2));
|
||
|
|
EXPECT_TRUE((NotNull2(p2) < NotNull1(p1)) == (p2 < p1));
|
||
|
|
|
||
|
|
EXPECT_TRUE((NotNull1(p1) > NotNull1(p1)) == "false");
|
||
|
|
EXPECT_TRUE((NotNull1(p1) > NotNull2(p2)) == (p1 > p2));
|
||
|
|
EXPECT_TRUE((NotNull2(p2) > NotNull1(p1)) == (p2 > p1));
|
||
|
|
|
||
|
|
EXPECT_TRUE((NotNull1(p1) <= NotNull1(p1)) == "true");
|
||
|
|
EXPECT_TRUE((NotNull1(p1) <= NotNull2(p2)) == (p1 <= p2));
|
||
|
|
EXPECT_TRUE((NotNull2(p2) <= NotNull1(p1)) == (p2 <= p1));
|
||
|
|
|
||
|
|
EXPECT_TRUE((NotNull1(p1) >= NotNull1(p1)) == "true");
|
||
|
|
EXPECT_TRUE((NotNull1(p1) >= NotNull2(p2)) == (p1 >= p2));
|
||
|
|
EXPECT_TRUE((NotNull2(p2) >= NotNull1(p1)) == (p2 >= p1));
|
||
|
|
}
|
||
|
|
|
||
|
|
#if defined(__cplusplus) && (__cplusplus >= 201703L)
|
||
|
|
|
||
|
|
TEST(notnull_tests, TestNotNullConstructorTypeDeduction)
|
||
|
|
{
|
||
|
|
{
|
||
|
|
int i = 42;
|
||
|
|
|
||
|
|
not_null x{&i};
|
||
|
|
helper(not_null{&i});
|
||
|
|
helper_const(not_null{&i});
|
||
|
|
|
||
|
|
EXPECT_TRUE(*x == 42);
|
||
|
|
}
|
||
|
|
|
||
|
|
{
|
||
|
|
int i = 42;
|
||
|
|
int* p = &i;
|
||
|
|
|
||
|
|
not_null x{p};
|
||
|
|
helper(not_null{p});
|
||
|
|
helper_const(not_null{p});
|
||
|
|
|
||
|
|
EXPECT_TRUE(*x == 42);
|
||
|
|
}
|
||
|
|
|
||
|
|
std::set_terminate([] {
|
||
|
|
std::cerr << "Expected Death. TestNotNullConstructorTypeDeduction";
|
||
|
|
std::abort();
|
||
|
|
});
|
||
|
|
|
||
|
|
{
|
||
|
|
auto workaround_macro = []() {
|
||
|
|
int* p1 = nullptr;
|
||
|
|
const not_null x{p1};
|
||
|
|
};
|
||
|
|
EXPECT_DEATH(workaround_macro(), deathstring);
|
||
|
|
}
|
||
|
|
|
||
|
|
{
|
||
|
|
auto workaround_macro = []() {
|
||
|
|
const int* p1 = nullptr;
|
||
|
|
const not_null x{p1};
|
||
|
|
};
|
||
|
|
EXPECT_DEATH(workaround_macro(), deathstring);
|
||
|
|
}
|
||
|
|
|
||
|
|
{
|
||
|
|
int* p = nullptr;
|
||
|
|
|
||
|
|
EXPECT_DEATH(helper(not_null{p}), deathstring);
|
||
|
|
EXPECT_DEATH(helper_const(not_null{p}), deathstring);
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifdef CONFIRM_COMPILATION_ERRORS
|
||
|
|
{
|
||
|
|
not_null x{nullptr};
|
||
|
|
helper(not_null{nullptr});
|
||
|
|
helper_const(not_null{nullptr});
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
#endif // #if defined(__cplusplus) && (__cplusplus >= 201703L)
|
||
|
|
|
||
|
|
TEST(notnull_tests, TestMakeNotNull)
|
||
|
|
{
|
||
|
|
{
|
||
|
|
int i = 42;
|
||
|
|
|
||
|
|
const auto x = make_not_null(&i);
|
||
|
|
helper(make_not_null(&i));
|
||
|
|
helper_const(make_not_null(&i));
|
||
|
|
|
||
|
|
EXPECT_TRUE(*x == 42);
|
||
|
|
}
|
||
|
|
|
||
|
|
{
|
||
|
|
int i = 42;
|
||
|
|
int* p = &i;
|
||
|
|
|
||
|
|
const auto x = make_not_null(p);
|
||
|
|
helper(make_not_null(p));
|
||
|
|
helper_const(make_not_null(p));
|
||
|
|
|
||
|
|
EXPECT_TRUE(*x == 42);
|
||
|
|
}
|
||
|
|
|
||
|
|
std::set_terminate([] {
|
||
|
|
std::cerr << "Expected Death. TestMakeNotNull";
|
||
|
|
std::abort();
|
||
|
|
});
|
||
|
|
|
||
|
|
{
|
||
|
|
const auto workaround_macro = []() {
|
||
|
|
int* p1 = nullptr;
|
||
|
|
const auto x = make_not_null(p1);
|
||
|
|
EXPECT_TRUE(*x == 42);
|
||
|
|
};
|
||
|
|
EXPECT_DEATH(workaround_macro(), deathstring);
|
||
|
|
}
|
||
|
|
|
||
|
|
{
|
||
|
|
const auto workaround_macro = []() {
|
||
|
|
const int* p1 = nullptr;
|
||
|
|
const auto x = make_not_null(p1);
|
||
|
|
EXPECT_TRUE(*x == 42);
|
||
|
|
};
|
||
|
|
EXPECT_DEATH(workaround_macro(), deathstring);
|
||
|
|
}
|
||
|
|
|
||
|
|
{
|
||
|
|
int* p = nullptr;
|
||
|
|
|
||
|
|
EXPECT_DEATH(helper(make_not_null(p)), deathstring);
|
||
|
|
EXPECT_DEATH(helper_const(make_not_null(p)), deathstring);
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifdef CONFIRM_COMPILATION_ERRORS
|
||
|
|
{
|
||
|
|
EXPECT_DEATH(make_not_null(nullptr), deathstring);
|
||
|
|
EXPECT_DEATH(helper(make_not_null(nullptr)), deathstring);
|
||
|
|
EXPECT_DEATH(helper_const(make_not_null(nullptr)), deathstring);
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
TEST(notnull_tests, TestStdHash)
|
||
|
|
{
|
||
|
|
int x = 42;
|
||
|
|
int y = 99;
|
||
|
|
not_null<int*> nn{&x};
|
||
|
|
const not_null<int*> cnn{&x};
|
||
|
|
|
||
|
|
std::hash<not_null<int*>> hash_nn;
|
||
|
|
std::hash<int*> hash_intptr;
|
||
|
|
|
||
|
|
EXPECT_TRUE(hash_nn(nn) == hash_intptr(&x));
|
||
|
|
EXPECT_FALSE(hash_nn(nn) == hash_intptr(&y));
|
||
|
|
EXPECT_FALSE(hash_nn(nn) == hash_intptr(nullptr));
|
||
|
|
}
|