Tracking issue for `#![feature(const_float_classify)]`

[ecstatic-morse]

Tracking issue for the #![feature(const_float_classify)] feature gate, which makes the following methods on f32 and f64 const fn:

• classify
• is_nan
• is_infinite
• is_finite
• is_subnormal
• is_normal
• is_sign_positive
• is_sign_negative

These require #72447 (#![feature(const_float_bits_conv)]), so this is transitively blocked on #57241.

[RalfJung]

#57241 is being proposed for stabilization, so this feature is also finally (transitively) unblocked. :)

Note that #114486 should also be reverted when is_nan becomes const-stable.