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AK: Make it possible to use HashMap<K, NonnullOwnPtr>::get()

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Add the concept of a PeekType to Traits<T>. This is the type we'll
return (wrapped in an Optional) from HashMap::get().

The PeekType for OwnPtr<T> and NonnullOwnPtr<T> is const T*,
which means that HashMap::get() will return an Optional<const T*> for
maps-of-those.
This commit is contained in:
Andreas Kling
2019-08-14 11:47:38 +02:00
parent f75b1127b2
commit fdcff7d15e
6 changed files with 40 additions and 2 deletions
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1
AK/NonnullOwnPtr.h
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@@ -142,6 +142,7 @@ make(Args&&... args)
template<typename T>
struct Traits<NonnullOwnPtr<T>> : public GenericTraits<NonnullOwnPtr<T>> {
using PeekType = const T*;
static unsigned hash(const NonnullOwnPtr<T>& p) { return (unsigned)p.ptr(); }
static void dump(const NonnullOwnPtr<T>& p) { kprintf("%p", p.ptr()); }
static bool equals(const NonnullOwnPtr<T>& a, const NonnullOwnPtr<T>& b) { return a.ptr() == b.ptr(); }