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AK+Kernel: Fix perfect forwarding constructors shadowing others

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If a non-const lvalue reference is passed to these constructors, the
converting constructor will be selected instead of the desired copy/move
constructor.

Since I needed to touch `KResultOr` anyway, I made the forwarding
converting constructor use `forward<U>` instead of `move`. This meant
that previously, if a lvalue was passed to it, a move operation took
place even if no `move()` was called on it. Member initializers and
if-else statements have been changed to match our current coding style.
This commit is contained in:
Daniel Bertalan 2021-07-05 18:23:45 +02:00 • committed by Gunnar Beutner
parent a2e0291172
commit 62f84e94c8
2 changed files with 16 additions and 10 deletions
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4
AK/Function.h
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@ -62,13 +62,13 @@ public:
}
template<typename CallableType>
Function(CallableType&& callable) requires((IsFunctionObject<CallableType> && IsCallableWithArguments<CallableType, In...>))
Function(CallableType&& callable) requires((IsFunctionObject<CallableType> && IsCallableWithArguments<CallableType, In...> && !IsSame<RemoveCVReference<CallableType>, Function>))
{
init_with_callable(forward<CallableType>(callable));
}
template<typename FunctionType>
Function(FunctionType f) requires((IsFunctionPointer<FunctionType> && IsCallableWithArguments<RemovePointer<FunctionType>, In...>))
Function(FunctionType f) requires((IsFunctionPointer<FunctionType> && IsCallableWithArguments<RemovePointer<FunctionType>, In...> && !IsSame<RemoveCVReference<FunctionType>, Function>))
{
init_with_callable(move(f));
}