Macro thread_local_process_attrs 

#[doc(hidden)] pub macro thread_local_process_attrs {
    (
        [] [$(#[$($prev_other_attrs:tt)*])*];
        @processing_cfg_attr { pred: ($($predicate:tt)*), rhs: [] };
        [$($prev_align_attrs_ret:tt)*] [$($prev_other_attrs_ret:tt)*];
        $($rest:tt)*
    ) => { ... },
    (
        [$(#[$($prev_align_attrs:tt)*])+] [];
        @processing_cfg_attr { pred: ($($predicate:tt)*), rhs: [] };
        [$($prev_align_attrs_ret:tt)*] [$($prev_other_attrs_ret:tt)*];
        $($rest:tt)*
    ) => { ... },
    (
        [$(#[$($prev_align_attrs:tt)*])+] [$(#[$($prev_other_attrs:tt)*])+];
        @processing_cfg_attr { pred: ($($predicate:tt)*), rhs: [] };
        [$($prev_align_attrs_ret:tt)*] [$($prev_other_attrs_ret:tt)*];
        $($rest:tt)*
    ) => { ... },
    (
        [$($prev_align_attrs:tt)*] [$($prev_other_attrs:tt)*];
        @processing_cfg_attr { pred: ($($predicate:tt)*), rhs: [rustc_align_static($($align_static_args:tt)*) $(, $($attr_rhs:tt)*)?] };
        $($rest:tt)*
    ) => { ... },
    (
        [$($prev_align_attrs:tt)*] [$($prev_other_attrs:tt)*];
        @processing_cfg_attr { pred: ($($predicate:tt)*), rhs: [cfg_attr(true, $($cfg_rhs:tt)*) $(, $($attr_rhs:tt)*)?] };
        $($rest:tt)*
    ) => { ... },
    (
        [$($prev_align_attrs:tt)*] [$($prev_other_attrs:tt)*];
        @processing_cfg_attr { pred: ($($predicate:tt)*), rhs: [cfg_attr(false, $($cfg_rhs:tt)*) $(, $($attr_rhs:tt)*)?] };
        $($rest:tt)*
    ) => { ... },
    (
        [$($prev_align_attrs:tt)*] [$($prev_other_attrs:tt)*];
        @processing_cfg_attr { pred: ($($predicate:tt)*), rhs: [cfg_attr($cfg_lhs:meta, $($cfg_rhs:tt)*) $(, $($attr_rhs:tt)*)?] };
        $($rest:tt)*
    ) => { ... },
    (
        [$($prev_align_attrs:tt)*] [$($prev_other_attrs:tt)*];
        @processing_cfg_attr { pred: ($($predicate:tt)*), rhs: [$meta:meta $(, $($attr_rhs:tt)*)?] };
        $($rest:tt)*
    ) => { ... },
    ([$($prev_align_attrs:tt)*] [$($prev_other_attrs:tt)*]; #[rustc_align_static $($attr_rest:tt)*] $($rest:tt)*) => { ... },
    ([$($prev_align_attrs:tt)*] [$($prev_other_attrs:tt)*]; #[cfg_attr(true, $($cfg_rhs:tt)*)] $($rest:tt)*) => { ... },
    ([$($prev_align_attrs:tt)*] [$($prev_other_attrs:tt)*]; #[cfg_attr(false, $($cfg_rhs:tt)*)] $($rest:tt)*) => { ... },
    ([$($prev_align_attrs:tt)*] [$($prev_other_attrs:tt)*]; #[cfg_attr($cfg_pred:meta, $($cfg_rhs:tt)*)] $($rest:tt)*) => { ... },
    ([$($prev_align_attrs:tt)*] [$($prev_other_attrs:tt)*]; $(#[doc $($doc_rhs:tt)*])+ $vis:vis static $($rest:tt)*) => { ... },
    ([$($prev_align_attrs:tt)*] [$($prev_other_attrs:tt)*];
     #[doc $($doc_rhs_1:tt)*] #[doc $($doc_rhs_2:tt)*] #[doc $($doc_rhs_3:tt)*] #[doc $($doc_rhs_4:tt)*]
     #[doc $($doc_rhs_5:tt)*] #[doc $($doc_rhs_6:tt)*] #[doc $($doc_rhs_7:tt)*] #[doc $($doc_rhs_8:tt)*]
     $($rest:tt)*) => { ... },
    ([$($prev_align_attrs:tt)*] [$($prev_other_attrs:tt)*]; #[$($attr:tt)*] $($rest:tt)*) => { ... },
    ([$($align_attrs:tt)*] [$($other_attrs:tt)*]; $vis:vis static $name:ident: $t:ty = const $init:block $(; $($($rest:tt)+)?)?) => { ... },
    ([$($align_attrs:tt)*] [$($other_attrs:tt)*]; $vis:vis static $name:ident: $t:ty = $init:expr $(; $($($rest:tt)+)?)?) => { ... },
}

🔬This is a nightly-only experimental API. (thread_local_internals)