<div dir="ltr">Hi!<br><br>I believe these two answer your question mostly (?):<br><a href="https://gitlab.haskell.org/ghc/ghc/issues/11671">https://gitlab.haskell.org/ghc/ghc/issues/11671</a><br><a href="https://github.com/ghc-proposals/ghc-proposals/pull/170">https://github.com/ghc-proposals/ghc-proposals/pull/170</a><br><br>=======<br>Georgi</div>