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AK: Make HashMap::get(Key) return an Optional<Value>.

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This allows HashMap::get() to be used for value types that cannot be default
constructed (e.g NonnullOwnPtr.)
This commit is contained in:
Andreas Kling 2019-07-24 10:25:43 +02:00
parent e2798d6208
commit 1d0b464618
10 changed files with 27 additions and 17 deletions
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15
AK/HashMap.h
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@ -1,6 +1,7 @@
#pragma once
#include <AK/HashTable.h>
#include <AK/Optional.h>
#include <AK/StdLibExtras.h>
#include <AK/Vector.h>
#include <AK/kstdio.h>
@ -51,21 +52,27 @@ public:
IteratorType begin() { return m_table.begin(); }
IteratorType end() { return m_table.end(); }
IteratorType find(const K& key) { return m_table.find(KeyTraits::hash(key), [&](auto& entry) { return KeyTraits::equals(key, entry.key); }); }
IteratorType find(const K& key)
{
return m_table.find(KeyTraits::hash(key), [&](auto& entry) { return KeyTraits::equals(key, entry.key); });
}
ConstIteratorType begin() const { return m_table.begin(); }
ConstIteratorType end() const { return m_table.end(); }
ConstIteratorType find(const K& key) const { return m_table.find(KeyTraits::hash(key), [&](auto& entry) { return KeyTraits::equals(key, entry.key); }); }
ConstIteratorType find(const K& key) const
{
return m_table.find(KeyTraits::hash(key), [&](auto& entry) { return KeyTraits::equals(key, entry.key); });
}
void ensure_capacity(int capacity) { m_table.ensure_capacity(capacity); }
void dump() const { m_table.dump(); }
V get(const K& key) const
Optional<V> get(const K& key) const
{
auto it = find(key);
if (it == end())
return V();
return {};
return (*it).value;
}