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Everywhere: Switch from EnableIf to requires

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C++20 provides the `requires` clause which simplifies the ability to
limit overload resolution. Prefer it over `EnableIf`

With all uses of `EnableIf` being removed, also remove the
implementation so future devs are not tempted.
This commit is contained in:
Lenny Maiorani 2022-03-17 11:29:46 -06:00 • committed by Brian Gianforcaro
parent 8f7219c6fa
commit 2844f7c333
9 changed files with 63 additions and 73 deletions
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7
Kernel/Library/ThreadSafeRefPtr.h
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@ -361,16 +361,17 @@ public:
ALWAYS_INLINE bool is_null() const { return PtrTraits::is_null(m_bits.load(AK::MemoryOrder::memory_order_relaxed)); }
template<typename U = T, typename EnableIf<IsSame<U, T> && !IsNullPointer<typename PtrTraits::NullType>>::Type* = nullptr>
template<typename U = T>
typename PtrTraits::NullType null_value() const
requires(IsSame<U, T> && !IsNullPointer<typename PtrTraits::NullType>)
{
// make sure we are holding a null value
FlatPtr bits = m_bits.load(AK::MemoryOrder::memory_order_relaxed);
VERIFY(PtrTraits::is_null(bits));
return PtrTraits::to_null_value(bits);
}
template<typename U = T, typename EnableIf<IsSame<U, T> && !IsNullPointer<typename PtrTraits::NullType>>::Type* = nullptr>
void set_null_value(typename PtrTraits::NullType value)
template<typename U = T>
void set_null_value(typename PtrTraits::NullType value) requires(IsSame<U, T> && !IsNullPointer<typename PtrTraits::NullType>)
{
// make sure that new null value would be interpreted as a null value
FlatPtr bits = PtrTraits::from_null_value(value);