module Loc : sig ... endval raise : loc:Loc.t ‑> string ‑> _Raise an error. Jenga will transfer the location and error message to the build manager so that it is properly displayed in emacs/vim/...
val raisef : loc:Loc.t ‑> ('a, unit, string, unit ‑> _) Core.format4 ‑> 'a