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Add a ClearElementAt API to nsTArray

This commit is contained in:
Fedor 2019-05-20 09:00:43 +03:00
parent 4d98824767
commit 5670037d3d
1 changed files with 18 additions and 0 deletions
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18
xpcom/glue/nsTArray.h
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@ -1503,6 +1503,24 @@ public:
mozilla::Forward<Item>(aItem));
}
// Reconstruct the element at the given index, and return a pointer to the
// reconstructed element. This will destroy the existing element and
// default-construct a new one, giving you a state much like what single-arg
// InsertElementAt(), or no-arg AppendElement() does, but without changing the
// length of the array.
//
// array[idx] = T()
//
// would accomplish the same thing as long as T has the appropriate moving
// operator=, but some types don't for various reasons.
elem_type* ReconstructElementAt(index_type aIndex)
{
elem_type* elem = &ElementAt(aIndex);
elem_traits::Destruct(elem);
elem_traits::Construct(elem);
return elem;
}
// This method searches for the smallest index of an element that is strictly
// greater than |aItem|. If |aItem| is inserted at this index, the array will
// remain sorted and |aItem| would come after all elements that are equal to