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fdcff7d15e
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.
58 lines
1.6 KiB
C++
58 lines
1.6 KiB
C++
#pragma once
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#include "HashFunctions.h"
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#include "kstdio.h"
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namespace AK {
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template<typename T>
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struct GenericTraits {
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using PeekType = T;
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static constexpr bool is_trivial() { return false; }
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static bool equals(const T& a, const T& b) { return a == b; }
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};
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template<typename T>
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struct Traits : public GenericTraits<T> {
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};
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template<>
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struct Traits<int> : public GenericTraits<int> {
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static constexpr bool is_trivial() { return true; }
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static unsigned hash(int i) { return int_hash(i); }
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static void dump(int i) { kprintf("%d", i); }
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};
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template<>
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struct Traits<unsigned> : public GenericTraits<unsigned> {
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static constexpr bool is_trivial() { return true; }
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static unsigned hash(unsigned u) { return int_hash(u); }
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static void dump(unsigned u) { kprintf("%u", u); }
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};
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template<>
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struct Traits<u16> : public GenericTraits<u16> {
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static constexpr bool is_trivial() { return true; }
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static unsigned hash(u16 u) { return int_hash(u); }
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static void dump(u16 u) { kprintf("%u", u); }
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};
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template<>
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struct Traits<char> : public GenericTraits<char> {
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static constexpr bool is_trivial() { return true; }
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static unsigned hash(char c) { return int_hash(c); }
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static void dump(char c) { kprintf("%c", c); }
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};
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template<typename T>
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struct Traits<T*> : public GenericTraits<T*> {
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static unsigned hash(const T* p)
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{
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return int_hash((unsigned)(__PTRDIFF_TYPE__)p);
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}
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static constexpr bool is_trivial() { return true; }
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static void dump(const T* p) { kprintf("%p", p); }
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static bool equals(const T* a, const T* b) { return a == b; }
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};
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}
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