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0033554: Foundation Classes - Missed hash specialization for enumerations

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Fixed problem with missed hash specialization
This commit is contained in:
dpasukhi 2023-12-14 21:39:25 +00:00 committed by vglukhik
parent 06282d9c7c
commit 5b0f5b52b9
1 changed files with 43 additions and 1 deletions
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44
src/NCollection/NCollection_DefaultHasher.hxx
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@ -29,8 +29,50 @@
* IsEqual.
*/
template <class TheKeyType>
DEFINE_HASHER(NCollection_DefaultHasher, TheKeyType, std::hash<TheKeyType>, std::equal_to<TheKeyType>)
struct NCollection_DefaultHasher
{
size_t operator()(const TheKeyType& theKey) const noexcept
{
return HashCode<TheKeyType>(theKey);
}
bool operator() (const TheKeyType& theK1, const TheKeyType& theK2) const noexcept
{
return IsEqual<TheKeyType>(theK1, theK2);
}
private:
// For non-enums
template <class T = TheKeyType>
typename std::enable_if<!std::is_enum<T>::value, size_t>::type
HashCode(const TheKeyType& theKey) const noexcept
{
return std::hash<TheKeyType>{}(theKey);
}
// For non-enums
template <class T = TheKeyType>
typename std::enable_if<!std::is_enum<T>::value, bool>::type
IsEqual(const TheKeyType& theK1, const TheKeyType& theK2) const noexcept
{
return std::equal_to<TheKeyType>{}(theK1, theK2);
}
// For enums
template <class T = TheKeyType>
typename std::enable_if<std::is_enum<T>::value, size_t>::type
HashCode(const TheKeyType& theKey) const noexcept
{
return static_cast<size_t>(theKey);
}
// For enums
template <class T = TheKeyType>
typename std::enable_if<std::is_enum<T>::value, bool>::type
IsEqual(const TheKeyType& theK1, const TheKeyType& theK2) const noexcept
{
return theK1 == theK2;
}
};
#define DEFINE_DEFAULT_HASHER_PURE(TheKeyType) \
template <> struct NCollection_DefaultHasher<TheKeyType> \