[libcxx] r307505 - optional: Implement LWG 2900 and P0602
Casey Carter via cfe-commits
cfe-commits at lists.llvm.org
Sun Jul 9 10:15:49 PDT 2017
Author: caseycarter
Date: Sun Jul 9 10:15:49 2017
New Revision: 307505
URL: http://llvm.org/viewvc/llvm-project?rev=307505&view=rev
Log:
optional: Implement LWG 2900 and P0602
Differential Revision: https://reviews.llvm.org/D32385
Removed:
libcxx/trunk/test/libcxx/utilities/optional/optional.object/special_member_gen.pass.cpp
Modified:
libcxx/trunk/include/optional
libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.assign/move.pass.cpp
libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.ctor/copy.pass.cpp
libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.ctor/move.pass.cpp
libcxx/trunk/test/std/utilities/optional/optional.object/special_member_gen.pass.cpp
Modified: libcxx/trunk/include/optional
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/include/optional?rev=307505&r1=307504&r2=307505&view=diff
==============================================================================
--- libcxx/trunk/include/optional (original)
+++ libcxx/trunk/include/optional Sun Jul 9 10:15:49 2017
@@ -439,46 +439,122 @@ struct __optional_storage_base<_Tp, true
}
};
-template <class _Tp, bool = is_trivially_copyable<_Tp>::value>
-struct __optional_storage;
-
-template <class _Tp>
-struct __optional_storage<_Tp, true> : __optional_storage_base<_Tp>
+template <class _Tp, bool = is_trivially_copy_constructible<_Tp>::value>
+struct __optional_copy_base : __optional_storage_base<_Tp>
{
using __optional_storage_base<_Tp>::__optional_storage_base;
};
template <class _Tp>
-struct __optional_storage<_Tp, false> : __optional_storage_base<_Tp>
+struct __optional_copy_base<_Tp, false> : __optional_storage_base<_Tp>
{
- using value_type = _Tp;
using __optional_storage_base<_Tp>::__optional_storage_base;
_LIBCPP_INLINE_VISIBILITY
- __optional_storage() = default;
+ __optional_copy_base() = default;
_LIBCPP_INLINE_VISIBILITY
- __optional_storage(const __optional_storage& __opt)
+ __optional_copy_base(const __optional_copy_base& __opt)
{
this->__construct_from(__opt);
}
_LIBCPP_INLINE_VISIBILITY
- __optional_storage(__optional_storage&& __opt)
+ __optional_copy_base(__optional_copy_base&&) = default;
+ _LIBCPP_INLINE_VISIBILITY
+ __optional_copy_base& operator=(const __optional_copy_base&) = default;
+ _LIBCPP_INLINE_VISIBILITY
+ __optional_copy_base& operator=(__optional_copy_base&&) = default;
+};
+
+template <class _Tp, bool = is_trivially_move_constructible<_Tp>::value>
+struct __optional_move_base : __optional_copy_base<_Tp>
+{
+ using __optional_copy_base<_Tp>::__optional_copy_base;
+};
+
+template <class _Tp>
+struct __optional_move_base<_Tp, false> : __optional_copy_base<_Tp>
+{
+ using value_type = _Tp;
+ using __optional_copy_base<_Tp>::__optional_copy_base;
+
+ _LIBCPP_INLINE_VISIBILITY
+ __optional_move_base() = default;
+ _LIBCPP_INLINE_VISIBILITY
+ __optional_move_base(const __optional_move_base&) = default;
+
+ _LIBCPP_INLINE_VISIBILITY
+ __optional_move_base(__optional_move_base&& __opt)
noexcept(is_nothrow_move_constructible_v<value_type>)
{
this->__construct_from(_VSTD::move(__opt));
}
_LIBCPP_INLINE_VISIBILITY
- __optional_storage& operator=(const __optional_storage& __opt)
+ __optional_move_base& operator=(const __optional_move_base&) = default;
+ _LIBCPP_INLINE_VISIBILITY
+ __optional_move_base& operator=(__optional_move_base&&) = default;
+};
+
+template <class _Tp, bool =
+ is_trivially_destructible<_Tp>::value &&
+ is_trivially_copy_constructible<_Tp>::value &&
+ is_trivially_copy_assignable<_Tp>::value>
+struct __optional_copy_assign_base : __optional_move_base<_Tp>
+{
+ using __optional_move_base<_Tp>::__optional_move_base;
+};
+
+template <class _Tp>
+struct __optional_copy_assign_base<_Tp, false> : __optional_move_base<_Tp>
+{
+ using __optional_move_base<_Tp>::__optional_move_base;
+
+ _LIBCPP_INLINE_VISIBILITY
+ __optional_copy_assign_base() = default;
+ _LIBCPP_INLINE_VISIBILITY
+ __optional_copy_assign_base(const __optional_copy_assign_base&) = default;
+ _LIBCPP_INLINE_VISIBILITY
+ __optional_copy_assign_base(__optional_copy_assign_base&&) = default;
+
+ _LIBCPP_INLINE_VISIBILITY
+ __optional_copy_assign_base& operator=(const __optional_copy_assign_base& __opt)
{
this->__assign_from(__opt);
return *this;
}
_LIBCPP_INLINE_VISIBILITY
- __optional_storage& operator=(__optional_storage&& __opt)
+ __optional_copy_assign_base& operator=(__optional_copy_assign_base&&) = default;
+};
+
+template <class _Tp, bool =
+ is_trivially_destructible<_Tp>::value &&
+ is_trivially_move_constructible<_Tp>::value &&
+ is_trivially_move_assignable<_Tp>::value>
+struct __optional_move_assign_base : __optional_copy_assign_base<_Tp>
+{
+ using __optional_copy_assign_base<_Tp>::__optional_copy_assign_base;
+};
+
+template <class _Tp>
+struct __optional_move_assign_base<_Tp, false> : __optional_copy_assign_base<_Tp>
+{
+ using value_type = _Tp;
+ using __optional_copy_assign_base<_Tp>::__optional_copy_assign_base;
+
+ _LIBCPP_INLINE_VISIBILITY
+ __optional_move_assign_base() = default;
+ _LIBCPP_INLINE_VISIBILITY
+ __optional_move_assign_base(const __optional_move_assign_base& __opt) = default;
+ _LIBCPP_INLINE_VISIBILITY
+ __optional_move_assign_base(__optional_move_assign_base&&) = default;
+ _LIBCPP_INLINE_VISIBILITY
+ __optional_move_assign_base& operator=(const __optional_move_assign_base&) = default;
+
+ _LIBCPP_INLINE_VISIBILITY
+ __optional_move_assign_base& operator=(__optional_move_assign_base&& __opt)
noexcept(is_nothrow_move_assignable_v<value_type> &&
is_nothrow_move_constructible_v<value_type>)
{
@@ -501,11 +577,11 @@ using __optional_sfinae_assign_base_t =
template <class _Tp>
class optional
- : private __optional_storage<_Tp>
+ : private __optional_move_assign_base<_Tp>
, private __optional_sfinae_ctor_base_t<_Tp>
, private __optional_sfinae_assign_base_t<_Tp>
{
- using __base = __optional_storage<_Tp>;
+ using __base = __optional_move_assign_base<_Tp>;
public:
using value_type = _Tp;
Removed: libcxx/trunk/test/libcxx/utilities/optional/optional.object/special_member_gen.pass.cpp
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/libcxx/utilities/optional/optional.object/special_member_gen.pass.cpp?rev=307504&view=auto
==============================================================================
--- libcxx/trunk/test/libcxx/utilities/optional/optional.object/special_member_gen.pass.cpp (original)
+++ libcxx/trunk/test/libcxx/utilities/optional/optional.object/special_member_gen.pass.cpp (removed)
@@ -1,66 +0,0 @@
-//===----------------------------------------------------------------------===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-// UNSUPPORTED: c++98, c++03, c++11, c++14
-// <optional>
-
-
-#include <optional>
-#include <type_traits>
-#include <cassert>
-
-#include "archetypes.hpp"
-
-template <class T>
-struct SpecialMemberTest {
- using O = std::optional<T>;
-
- template <template <class> class TestMF>
- static constexpr bool check_same() {
- return TestMF<O>::value == TestMF<T>::value;
- }
-
- // Test that optional inherits the correct trivial/non-trivial members
- static_assert(check_same<std::is_trivially_destructible>(), "");
- static_assert(check_same<std::is_trivially_copyable>(), "");
-};
-
-template <class ...Args> static void sink(Args&&...) {}
-
-template <class ...TestTypes>
-struct DoTestsMetafunction {
- DoTestsMetafunction() { sink(SpecialMemberTest<TestTypes>{}...); }
-};
-
-struct TrivialMoveNonTrivialCopy {
- TrivialMoveNonTrivialCopy() = default;
- TrivialMoveNonTrivialCopy(const TrivialMoveNonTrivialCopy&) {}
- TrivialMoveNonTrivialCopy(TrivialMoveNonTrivialCopy&&) = default;
- TrivialMoveNonTrivialCopy& operator=(const TrivialMoveNonTrivialCopy&) { return *this; }
- TrivialMoveNonTrivialCopy& operator=(TrivialMoveNonTrivialCopy&&) = default;
-};
-
-struct TrivialCopyNonTrivialMove {
- TrivialCopyNonTrivialMove() = default;
- TrivialCopyNonTrivialMove(const TrivialCopyNonTrivialMove&) = default;
- TrivialCopyNonTrivialMove(TrivialCopyNonTrivialMove&&) {}
- TrivialCopyNonTrivialMove& operator=(const TrivialCopyNonTrivialMove&) = default;
- TrivialCopyNonTrivialMove& operator=(TrivialCopyNonTrivialMove&&) { return *this; }
-};
-
-int main()
-{
- sink(
- ImplicitTypes::ApplyTypes<DoTestsMetafunction>{},
- ExplicitTypes::ApplyTypes<DoTestsMetafunction>{},
- NonLiteralTypes::ApplyTypes<DoTestsMetafunction>{},
- NonTrivialTypes::ApplyTypes<DoTestsMetafunction>{},
- DoTestsMetafunction<TrivialMoveNonTrivialCopy, TrivialCopyNonTrivialMove>{}
- );
-}
Modified: libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.assign/move.pass.cpp
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.assign/move.pass.cpp?rev=307505&r1=307504&r2=307505&view=diff
==============================================================================
--- libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.assign/move.pass.cpp (original)
+++ libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.assign/move.pass.cpp Sun Jul 9 10:15:49 2017
@@ -147,27 +147,27 @@ int main()
}
{
struct ThrowsMove {
- ThrowsMove() noexcept {}
- ThrowsMove(ThrowsMove const&) noexcept {}
- ThrowsMove(ThrowsMove &&) noexcept(false) {}
- ThrowsMove& operator=(ThrowsMove const&) noexcept { return *this; }
- ThrowsMove& operator=(ThrowsMove &&) noexcept { return *this; }
+ ThrowsMove() noexcept {}
+ ThrowsMove(ThrowsMove const&) noexcept {}
+ ThrowsMove(ThrowsMove &&) noexcept(false) {}
+ ThrowsMove& operator=(ThrowsMove const&) noexcept { return *this; }
+ ThrowsMove& operator=(ThrowsMove &&) noexcept { return *this; }
};
static_assert(!std::is_nothrow_move_assignable<optional<ThrowsMove>>::value, "");
struct ThrowsMoveAssign {
- ThrowsMoveAssign() noexcept {}
- ThrowsMoveAssign(ThrowsMoveAssign const&) noexcept {}
- ThrowsMoveAssign(ThrowsMoveAssign &&) noexcept {}
- ThrowsMoveAssign& operator=(ThrowsMoveAssign const&) noexcept { return *this; }
- ThrowsMoveAssign& operator=(ThrowsMoveAssign &&) noexcept(false) { return *this; }
+ ThrowsMoveAssign() noexcept {}
+ ThrowsMoveAssign(ThrowsMoveAssign const&) noexcept {}
+ ThrowsMoveAssign(ThrowsMoveAssign &&) noexcept {}
+ ThrowsMoveAssign& operator=(ThrowsMoveAssign const&) noexcept { return *this; }
+ ThrowsMoveAssign& operator=(ThrowsMoveAssign &&) noexcept(false) { return *this; }
};
static_assert(!std::is_nothrow_move_assignable<optional<ThrowsMoveAssign>>::value, "");
struct NoThrowMove {
- NoThrowMove() noexcept(false) {}
- NoThrowMove(NoThrowMove const&) noexcept(false) {}
- NoThrowMove(NoThrowMove &&) noexcept {}
- NoThrowMove& operator=(NoThrowMove const&) noexcept { return *this; }
- NoThrowMove& operator=(NoThrowMove&&) noexcept { return *this; }
+ NoThrowMove() noexcept(false) {}
+ NoThrowMove(NoThrowMove const&) noexcept(false) {}
+ NoThrowMove(NoThrowMove &&) noexcept {}
+ NoThrowMove& operator=(NoThrowMove const&) noexcept { return *this; }
+ NoThrowMove& operator=(NoThrowMove&&) noexcept { return *this; }
};
static_assert(std::is_nothrow_move_assignable<optional<NoThrowMove>>::value, "");
}
Modified: libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.ctor/copy.pass.cpp
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.ctor/copy.pass.cpp?rev=307505&r1=307504&r2=307505&view=diff
==============================================================================
--- libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.ctor/copy.pass.cpp (original)
+++ libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.ctor/copy.pass.cpp Sun Jul 9 10:15:49 2017
@@ -45,10 +45,10 @@ constexpr bool constexpr_test(InitArgs&&
void test_throwing_ctor() {
#ifndef TEST_HAS_NO_EXCEPTIONS
struct Z {
- Z() : count(0) {}
- Z(Z const& o) : count(o.count + 1)
- { if (count == 2) throw 6; }
- int count;
+ Z() : count(0) {}
+ Z(Z const& o) : count(o.count + 1)
+ { if (count == 2) throw 6; }
+ int count;
};
const Z z;
const optional<Z> rhs(z);
Modified: libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.ctor/move.pass.cpp
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.ctor/move.pass.cpp?rev=307505&r1=307504&r2=307505&view=diff
==============================================================================
--- libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.ctor/move.pass.cpp (original)
+++ libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.ctor/move.pass.cpp Sun Jul 9 10:15:49 2017
@@ -55,10 +55,10 @@ constexpr bool constexpr_test(InitArgs&&
void test_throwing_ctor() {
#ifndef TEST_HAS_NO_EXCEPTIONS
struct Z {
- Z() : count(0) {}
- Z(Z&& o) : count(o.count + 1)
- { if (count == 2) throw 6; }
- int count;
+ Z() : count(0) {}
+ Z(Z&& o) : count(o.count + 1)
+ { if (count == 2) throw 6; }
+ int count;
};
Z z;
optional<Z> rhs(std::move(z));
Modified: libcxx/trunk/test/std/utilities/optional/optional.object/special_member_gen.pass.cpp
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/std/utilities/optional/optional.object/special_member_gen.pass.cpp?rev=307505&r1=307504&r2=307505&view=diff
==============================================================================
--- libcxx/trunk/test/std/utilities/optional/optional.object/special_member_gen.pass.cpp (original)
+++ libcxx/trunk/test/std/utilities/optional/optional.object/special_member_gen.pass.cpp Sun Jul 9 10:15:49 2017
@@ -33,10 +33,38 @@ struct SpecialMemberTest {
"optional<T> is copy assignable if and only if T is both copy "
"constructible and copy assignable.");
static_assert(std::is_move_assignable_v<O> ==
- ((std::is_copy_constructible_v<T> && std::is_copy_assignable_v<T>) ||
- (std::is_move_constructible_v<T> && std::is_move_assignable_v<T>)),
- "optional<T> is move assignable if and only if T is both move assignable and "
- "move constructible, or both copy constructible and copy assignable.");
+ ((std::is_move_constructible_v<T> && std::is_move_assignable_v<T>) ||
+ (std::is_copy_constructible_v<T> && std::is_copy_assignable_v<T>)),
+ "optional<T> is move assignable if and only if T is both move constructible and "
+ "move assignable, or both copy constructible and copy assignable.");
+
+ // The following tests are for not-yet-standardized behavior (P0602):
+ static_assert(std::is_trivially_destructible_v<O> ==
+ std::is_trivially_destructible_v<T>,
+ "optional<T> is trivially destructible if and only if T is.");
+ static_assert(std::is_trivially_copy_constructible_v<O> ==
+ std::is_trivially_copy_constructible_v<T>,
+ "optional<T> is trivially copy constructible if and only if T is.");
+ static_assert(std::is_trivially_move_constructible_v<O> ==
+ std::is_trivially_move_constructible_v<T> ||
+ (!std::is_move_constructible_v<T> && std::is_trivially_copy_constructible_v<T>),
+ "optional<T> is trivially move constructible if T is trivially move constructible, "
+ "or if T is trivially copy constructible and is not move constructible.");
+ static_assert(std::is_trivially_copy_assignable_v<O> ==
+ (std::is_trivially_destructible_v<T> &&
+ std::is_trivially_copy_constructible_v<T> &&
+ std::is_trivially_copy_assignable_v<T>),
+ "optional<T> is trivially copy assignable if and only if T is trivially destructible, "
+ "trivially copy constructible, and trivially copy assignable.");
+ static_assert(std::is_trivially_move_assignable_v<O> ==
+ (std::is_trivially_destructible_v<T> &&
+ ((std::is_trivially_move_constructible_v<T> && std::is_trivially_move_assignable_v<T>) ||
+ ((!std::is_move_constructible_v<T> || !std::is_move_assignable_v<T>) &&
+ std::is_trivially_copy_constructible_v<T> && std::is_trivially_copy_assignable_v<T>))),
+ "optional<T> is trivially move assignable if T is trivially destructible, and either "
+ "(1) trivially move constructible and trivially move assignable, or "
+ "(2) not move constructible or not move assignable, and "
+ "trivially copy constructible and trivially copy assignable.");
};
template <class ...Args> static void sink(Args&&...) {}
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