Module Migrate_parsetree.Driver

State a rewriter can access

type extra = ..

type config = {

tool_name : string;
include_dirs : string list;
load_path : string list;
debug : bool;
for_package : string option;	Additional parameters that can be passed by a caller of rewrite_{signature,structure} to a specific register rewriter.
extras : extra list;

}

val make_config : tool_name:string -> ?⁠include_dirs:string list -> ?⁠load_path:string list -> ?⁠debug:bool -> ?⁠for_package:string -> ?⁠extras:extra list -> unit -> config

type cookies

val get_cookie : cookies -> string -> 'types Versions.ocaml_version -> 'types Versions.get_expression option

val set_cookie : cookies -> string -> 'types Versions.ocaml_version -> 'types Versions.get_expression -> unit

val set_global_cookie : string -> 'types Versions.ocaml_version -> 'types Versions.get_expression -> unit

Registering rewriters

type 'types rewriter = config -> cookies -> 'types Versions.get_mapper

val register : name:string -> ?⁠reset_args:(unit -> unit) -> ?⁠args:(Stdlib.Arg.key * Stdlib.Arg.spec * Stdlib.Arg.doc) list -> ?⁠position:int -> 'types Versions.ocaml_version -> 'types rewriter -> unit

Register a ppx rewriter. position is a integer that indicates when the ppx rewriter should be applied. It is guaranteed that if two ppx rewriters a and b have different position numbers, then the one with the lowest number will be applied first. The rewriting order of ppx rewriters with the same position number is not specified. The default position is 0.

Note that more different position numbers means more AST conversions and slower rewriting, so think twice before setting position to a non-zero number.

val registered_args : unit -> (Stdlib.Arg.key * Stdlib.Arg.spec * Stdlib.Arg.doc) list

Return the list of command line arguments registered by rewriters

val reset_args : unit -> unit

Call all the registered reset_args callbacks

Running registered rewriters

val run_as_ast_mapper : ?⁠exit_on_error:bool -> string list -> Ast_mapper.mapper

val run_as_ppx_rewriter : ?⁠exit_on_error:bool -> ?⁠argv:string array -> unit -> unit

val run_main : ?⁠exit_on_error:bool -> ?⁠argv:string array -> unit -> unit

Manual mapping

type some_signature =

| Sig : (module Versions.OCaml_version with type Ast.Parsetree.signature = 'concrete) * 'concrete -> some_signature

type some_structure =

| Str : (module Versions.OCaml_version with type Ast.Parsetree.structure = 'concrete) * 'concrete -> some_structure

val migrate_some_signature : 'version Versions.ocaml_version -> some_signature -> 'version Versions.get_signature

val migrate_some_structure : 'version Versions.ocaml_version -> some_structure -> 'version Versions.get_structure

val rewrite_signature : config -> 'version Versions.ocaml_version -> 'version Versions.get_signature -> some_signature

val rewrite_structure : config -> 'version Versions.ocaml_version -> 'version Versions.get_structure -> some_structure