Enum.HasAnyFlag

[ulfemsoy]

The current Enum.HasFlag(value, flag) is defined as:
(value & flag) == flag

I suggest to introduce another common method called Enum.HasAnyFlag(value, flag) defined as
(value & flag) != 0

[huoyaoyuan]

Enum.HasFlag is well-known to be unfriendly to performance. Although there's optimization now, it's still causing excessive allocations under Debug config.
I'm afraid there won't be interest until a better pattern is employed.

[colejohnson66]

Isn’t Enum.HasFlag intrinsic on 8.0 and up? Theoretically, Enum.HasAnyFlag would be as well.

[huoyaoyuan]

The intrinsic isn't enabled on Debug application. Someone told me that it's causing excessive allocation.
Moreover, HasFlag<T>(this T left, T rigit) can have even better type safety.

[hez2010]

It's old news. Now with #89348 those allocations are gone even under Debug.

[huoyaoyuan]

Now with #89348 those allocations are gone even under Debug.

Is it? Tier 0 is not Debug. The optimization is still disabled under MinOpts.

Since the PR explicitly mentions Debug, I think it's covered. But I remember seeing OptimizationDisabled condition when I check it recently.