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Merge pull request #4 from lioncash/hash 

hecl/hecl: Make Hash interface constexpr where applicable
This commit is contained in:
Phillip Stephens 2019-08-15 07:46:56 -07:00 committed by GitHub
parent 9dc1373201 9ec19d99cd
commit 1ea371b5cd
1 changed files with 24 additions and 23 deletions
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47
hecl/include/hecl/hecl.hpp
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@ -409,35 +409,36 @@ protected:
uint64_t hash = 0; uint64_t hash = 0;
public: public:
Hash() = default; constexpr Hash() = default;
operator bool() const { return hash != 0; } constexpr Hash(const Hash&) = default;
Hash(const void* buf, size_t len) : hash(XXH64((uint8_t*)buf, len, 0)) {} constexpr Hash(Hash&&) noexcept = default;
Hash(std::string_view str) : hash(XXH64((uint8_t*)str.data(), str.size(), 0)) {} constexpr Hash(uint64_t hashin) : hash(hashin) {}
Hash(std::wstring_view str) : hash(XXH64((uint8_t*)str.data(), str.size() * 2, 0)) {} explicit Hash(const void* buf, size_t len) : hash(XXH64((uint8_t*)buf, len, 0)) {}
Hash(uint64_t hashin) : hash(hashin) {} explicit Hash(std::string_view str) : hash(XXH64((uint8_t*)str.data(), str.size(), 0)) {}
Hash(const Hash& other) { hash = other.hash; } explicit Hash(std::wstring_view str) : hash(XXH64((uint8_t*)str.data(), str.size() * 2, 0)) {}
uint32_t val32() const { return uint32_t(hash) ^ uint32_t(hash >> 32); }
uint64_t val64() const { return uint64_t(hash); } constexpr uint32_t val32() const { return uint32_t(hash) ^ uint32_t(hash >> 32); }
size_t valSizeT() const { return size_t(hash); } constexpr uint64_t val64() const { return uint64_t(hash); }
constexpr size_t valSizeT() const { return size_t(hash); }
template <typename T> template <typename T>
T valT() const; constexpr T valT() const;
Hash& operator=(const Hash& other) {
hash = other.hash; constexpr Hash& operator=(const Hash& other) = default;
return *this; constexpr Hash& operator=(Hash&& other) noexcept = default;
} constexpr bool operator==(const Hash& other) const { return hash == other.hash; }
bool operator==(const Hash& other) const { return hash == other.hash; } constexpr bool operator!=(const Hash& other) const { return hash != other.hash; }
bool operator!=(const Hash& other) const { return hash != other.hash; } constexpr bool operator<(const Hash& other) const { return hash < other.hash; }
bool operator<(const Hash& other) const { return hash < other.hash; } constexpr bool operator>(const Hash& other) const { return hash > other.hash; }
bool operator>(const Hash& other) const { return hash > other.hash; } constexpr bool operator<=(const Hash& other) const { return hash <= other.hash; }
bool operator<=(const Hash& other) const { return hash <= other.hash; } constexpr bool operator>=(const Hash& other) const { return hash >= other.hash; }
bool operator>=(const Hash& other) const { return hash >= other.hash; } constexpr explicit operator bool() const { return hash != 0; }
}; };
template <> template <>
inline uint32_t Hash::valT<uint32_t>() const { constexpr uint32_t Hash::valT<uint32_t>() const {
return val32(); return val32();
} }
template <> template <>
inline uint64_t Hash::valT<uint64_t>() const { constexpr uint64_t Hash::valT<uint64_t>() const {
return val64(); return val64();
} }