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AK: Introduce Vector::unchecked_empend()

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This does the same thing as `Vector::empend()` without attempting to
grow the underlying buffer.
This commit is contained in:
Tim Ledbetter
2025-11-26 08:28:27 +00:00
committed by Tim Ledbetter
parent f675cfe90f
commit c1742fa989
Notes: github-actions[bot] 2025-11-26 14:35:34 +00:00 
Author: https://github.com/tcl3
Commit: https://github.com/LadybirdBrowser/ladybird/commit/c1742fa9898
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/6938
Reviewed-by: https://github.com/alimpfard ✅
1 changed files with 21 additions and 0 deletions
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21
AK/Vector.h
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@@ -382,6 +382,27 @@ public:
MUST(try_empend(forward<Args>(args)...));
}
template<class... Args>
ALWAYS_INLINE void unchecked_empend(Args&&... args)
requires(!contains_reference)
{
VERIFY(m_size < capacity());
if constexpr (want_fast_last_access) {
++m_metadata.last_slot;
++m_size;
} else {
++m_size;
}
StorageType* last_slot;
if constexpr (want_fast_last_access)
last_slot = m_metadata.last_slot;
else
last_slot = slot(m_size - 1);
new (last_slot) StorageType(forward<Args>(args)...);
}
template<typename U = T>
void prepend(U&& value)
requires(CanBePlacedInsideVector<U>)