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AK: Add a constructor from C-style arrays for FixedArray

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We really want to be able to construct FixedArray from a list of
non-copyable but movable objects. This constructor is useful for
such things.
This commit is contained in:
creator1creeper1 2022-01-10 15:30:52 +01:00 committed by Idan Horowitz
parent 6576d0291c
commit 0362b15895
Notes: sideshowbarker 2024-07-17 20:50:29 +09:00 
Author: https://github.com/creator1creeper1
Commit: https://github.com/SerenityOS/serenity/commit/0362b158952
Pull-request: https://github.com/SerenityOS/serenity/pull/11843
Reviewed-by: https://github.com/IdanHo ✅
Reviewed-by: https://github.com/bgianfo
1 changed files with 17 additions and 0 deletions
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17
AK/FixedArray.h
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@ -38,6 +38,23 @@ public:
return MUST(try_create(size)); return MUST(try_create(size));
} }
// NOTE:
// Even though it may look like there will be a template instantiation of this function for every size,
// the compiler will inline this anyway and therefore not generate any duplicate code.
template<size_t N>
static ErrorOr<FixedArray<T>> try_create(T(&&array)[N])
{
if (N == 0)
return FixedArray<T>();
T* elements = static_cast<T*>(kmalloc_array(N, sizeof(T)));
if (!elements)
return Error::from_errno(ENOMEM);
for (size_t i = 0; i < N; ++i)
new (&elements[i]) T(move(array[i]));
return FixedArray<T>(N, elements);
}
ErrorOr<FixedArray<T>> try_clone() const ErrorOr<FixedArray<T>> try_clone() const
{ {
if (m_size == 0) if (m_size == 0)