Methods Fn(Mut,Once)::call(mut,once)
are gated with two feature gates, remove one of them
#34802
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Methods
Fn::call
,FnMut::call_mut
andFnOnce::call_once
are gated with usual library featurefn_traits
and also hardcoded in the compiler and gated once more with featureunboxed_closures
This patch removes the
unboxed_closures
feature gate from these methods (unboxed_closures
is still used for other things though), now they are gated only withfn_traits
.All unnecessary
#![feature(unboxed_closures)]
s are removed, many of them are old and were already unnecessary before the change this PR does.