fnptr_impls_safety_abi! { #[unstable(feature = "c_unwind", issue = "74990")] $FnTy, $($Arg),* }
};
(#[$meta:meta] $FnTy: ty, $($Arg: ident),*) => {
fnptr_impls_safety_abi! { #[unstable(feature = "c_unwind", issue = "74990")] $FnTy, $($Arg),* }
};
(#[$meta:meta] $FnTy: ty, $($Arg: ident),*) => {