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AK: Make smart pointer factories work with aggregates

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Aggregate initialization with brace-enclosed parameters is a
[C++20 feature][1] not yet implemented by Clang. This caused compile
errors if we tried to use the factory functions to create smart pointers
to aggregates.

As a (temporary) fix, [the LWG's previously proposed solution][2] is
implemented by this commit.

Now, wherever it's not possible to direct-initialize, aggregate
initialization is performed.

[1]:
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2019/p0960r3.html
[2]: http://www.open-std.org/jtc1/sc22/wg21/docs/lwg-active.html#2089
This commit is contained in:
Daniel Bertalan 2021-07-01 10:21:14 +02:00 • committed by Ali Mohammad Pur
parent fda9f394d1
commit 3c6bdb8a61
5 changed files with 37 additions and 4 deletions
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5
AK/StdLibExtraDetails.h
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@ -443,6 +443,10 @@ auto declval() -> T;
template<typename T, typename... Args>
inline constexpr bool IsCallableWithArguments = requires(T t) { t(declval<Args>()...); };
template<typename T, typename... Args>
inline constexpr bool IsConstructible = requires { ::new T(declval<Args>()...); };
}
using AK::Detail::AddConst;
using AK::Detail::Conditional;
@ -459,6 +463,7 @@ using AK::Detail::IsBaseOf;
using AK::Detail::IsCallableWithArguments;
using AK::Detail::IsClass;
using AK::Detail::IsConst;
using AK::Detail::IsConstructible;
using AK::Detail::IsEnum;
using AK::Detail::IsFloatingPoint;
using AK::Detail::IsFunction;