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Bug 696195. Add single-argument SafeElementAt specializations for nsTArrays of smart pointers. r=jlebar

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This commit is contained in:
Boris Zbarsky 2011-10-25 12:58:01 -04:00
parent 42e6a92cb5
commit d9a272bc06
1 changed files with 33 additions and 0 deletions
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33
xpcom/glue/nsTArray.h
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@ -144,6 +144,39 @@ struct nsTArray_SafeElementAtHelper<E*, Derived>
}
};
// E is the base type that the smart pointer is templated over; the
// smart pointer can act as E*.
template <class E, class Derived>
struct nsTArray_SafeElementAtSmartPtrHelper
{
typedef E* elem_type;
typedef PRUint32 index_type;
elem_type SafeElementAt(index_type i) {
return static_cast<Derived*> (this)->SafeElementAt(i, nsnull);
}
const elem_type SafeElementAt(index_type i) const {
return static_cast<const Derived*> (this)->SafeElementAt(i, nsnull);
}
};
template <class T> class nsCOMPtr;
template <class E, class Derived>
struct nsTArray_SafeElementAtHelper<nsCOMPtr<E>, Derived> :
public nsTArray_SafeElementAtSmartPtrHelper<E, Derived>
{
};
template <class T> class nsRefPtr;
template <class E, class Derived>
struct nsTArray_SafeElementAtHelper<nsRefPtr<E>, Derived> :
public nsTArray_SafeElementAtSmartPtrHelper<E, Derived>
{
};
//
// This class serves as a base class for nsTArray. It shouldn't be used
// directly. It holds common implementation code that does not depend on the