We are in the midst of simplifying the compiler's lifetime system. In general, this means that TyCtxt<'a, 'gcx, 'tcx> is going to become just TyCtxt<'tcx>, where 'tcx represents the lifetime of the entire compilation (we no longer have global and local arenas).
Implementation plan
If your PR is affected
Once #61817 lands, what you want to do is generally rewrite to TyCtxt<'tcx> or -- less often -- TyCtxt<'_>. More specifically, you can convert older code by pattern matching like so:
TyCtxt<_, 'tcx, _> becomes TyCtxt<'tcx>TyCtxt<'_, '_, 'tcx> becomes TyCtxt<'tcx>
You can also handle any unused lifetime warnings by replacing the unused lifetime with '_.
Note: when adapting your code, you should never need to introduce a new lifetime, you're only removing them. If you find yourself adding a 'gcx to some impl, that's wrong =)
We are in the midst of simplifying the compiler's lifetime system. In general, this means that
TyCtxt<'a, 'gcx, 'tcx>is going to become justTyCtxt<'tcx>, where'tcxrepresents the lifetime of the entire compilation (we no longer have global and local arenas).Implementation plan
TyCtxt<'a, 'gcx, 'tcx>toTyCtxt<'gcx, 'tcx>rustc: replaceTyCtxt<'a, 'gcx, 'tcx>withTyCtxt<'gcx, 'tcx>. #61722TyCtxt<'gcx, 'tcx>toTyCtxt<'tcx>Unify all uses of 'gcx and 'tcx. #61817If your PR is affected
Once #61817 lands, what you want to do is generally rewrite to
TyCtxt<'tcx>or -- less often --TyCtxt<'_>. More specifically, you can convert older code by pattern matching like so:TyCtxt<_, 'tcx, _>becomesTyCtxt<'tcx>TyCtxt<'_, '_, 'tcx>becomesTyCtxt<'tcx>You can also handle any unused lifetime warnings by replacing the unused lifetime with
'_.Note: when adapting your code, you should never need to introduce a new lifetime, you're only removing them. If you find yourself adding a
'gcxto some impl, that's wrong =)