Make visitors compatible with ppxlib 0.22.0
In ppxlib 0.22.0, the internal AST got bumped to ocaml 4.12. This commit adapts visitors to the compiler changes from 4.11 to 4.12: mainly, the introduction of injectivity to type declarations.
[En cours] Mise en place de quotas sur nos instances GitLab. Plus d'information sur : https://doc-si.inria.fr/pages/viewpage.action?pageId=146834656
[In progress] Quotas installation on our GitLab instances. More information: https://doc-si.inria.fr/pages/viewpage.action?pageId=146834656
Prochaine maintenance programmée : lundi 07/10
Pour plus d'informations : https://doc-si.inria.fr/display/SU/Gitlab
In ppxlib 0.22.0, the internal AST got bumped to ocaml 4.12. This commit adapts visitors to the compiler changes from 4.11 to 4.12: mainly, the introduction of injectivity to type declarations.