Ast_invariants(3) OCaml library Ast_invariants(3) NAME Ast_invariants - Check AST invariants Module Module Ast_invariants Documentation Module Ast_invariants : sig end Check AST invariants Warning: this module is unstable and part of Compiler_libs . val structure : Parsetree.structure -> unit val signature : Parsetree.signature -> unit val check_loc_ghost : (Ast_iterator.iterator -> Ast_iterator.iterator -> 'a -> unit) -> 'a -> source_contents:string -> unit Checks the invariant of Location.t's loc_ghost field, that are stated in location.mli. This can be run with -dparsetree-loc-ghost-invariants, which is used slightly in the testsuite, but should be used more to find more of the places where the invariant is broken. OCamldoc 2026-06-22 Ast_invariants(3)