Refactor syntax versioning management
Now, the version of the main language as well as the version of extensions is passed through the user context of sexp parsers. Signed-off-by: Jeremie Dimino <jeremie@dimino.org>
This commit is contained in:
parent
2d1765285a
commit
43f274b323
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@ -122,17 +122,24 @@ type t =
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}
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module Lang = struct
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type t = Syntax.Version.t * Stanza.Parser.t list
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type t =
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{ syntax : Syntax.t
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; stanzas : Stanza.Parser.t list
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}
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let make ver f = (ver, f)
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type instance =
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{ lang : t
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; version : Syntax.Version.t
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}
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let langs = Hashtbl.create 32
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let register name versions =
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let register syntax stanzas =
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let name = Syntax.name syntax in
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if Hashtbl.mem langs name then
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Exn.code_error "Dune_project.Lang.register: already registered"
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[ "name", Sexp.To_sexp.string name ];
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Hashtbl.add langs name (Syntax.Versioned_parser.make versions)
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Hashtbl.add langs name { syntax; stanzas }
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let parse first_line =
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let { Dune_lexer.
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@ -142,44 +149,67 @@ module Lang = struct
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in
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let ver =
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Sexp.Of_sexp.parse Syntax.Version.t Univ_map.empty
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(Atom (ver_loc, Sexp.Atom.of_string ver)) in
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(Atom (ver_loc, Sexp.Atom.of_string ver))
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in
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match Hashtbl.find langs name with
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| None ->
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Loc.fail name_loc "Unknown language %S.%s" name
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(hint name (Hashtbl.keys langs))
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| Some versions ->
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Syntax.Versioned_parser.find_exn versions
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~loc:ver_loc ~data_version:ver
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| Some t ->
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Syntax.check_supported t.syntax (ver_loc, ver);
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{ lang = t
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; version = ver
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}
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let latest name =
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let versions = Option.value_exn (Hashtbl.find langs name) in
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Syntax.Versioned_parser.last versions
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let version = fst
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let get_exn name =
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let lang = Option.value_exn (Hashtbl.find langs name) in
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{ lang
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; version = Syntax.greatest_supported_version lang.syntax
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}
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end
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module Extension = struct
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type t = Syntax.Version.t * Stanza.Parser.t list Sexp.Of_sexp.t
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type t =
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{ syntax : Syntax.t
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; stanzas : Stanza.Parser.t list Sexp.Of_sexp.t
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}
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let make ver f = (ver, f)
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type instance =
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{ extension : t
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; version : Syntax.Version.t
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; loc : Loc.t
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; parse_args : Stanza.Parser.t list Sexp.Of_sexp.t -> Stanza.Parser.t list
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}
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let extensions = Hashtbl.create 32
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let register name versions =
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let register syntax stanzas =
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let name = Syntax.name syntax in
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if Hashtbl.mem extensions name then
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Exn.code_error "Dune_project.Extension.register: already registered"
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[ "name", Sexp.To_sexp.string name ];
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Hashtbl.add extensions name (Syntax.Versioned_parser.make versions)
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Hashtbl.add extensions name { syntax; stanzas }
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let lookup (name_loc, name) (ver_loc, ver) =
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let instantiate ~loc ~parse_args (name_loc, name) (ver_loc, ver) =
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match Hashtbl.find extensions name with
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| None ->
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Loc.fail name_loc "Unknown extension %S.%s" name
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(hint name (Hashtbl.keys extensions))
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| Some versions ->
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Syntax.Versioned_parser.find_exn versions ~loc:ver_loc ~data_version:ver
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| Some t ->
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Syntax.check_supported t.syntax (ver_loc, ver);
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{ extension = t
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; version = ver
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; loc
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; parse_args
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}
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end
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let make_parsing_context ~(lang : Lang.instance) ~extensions =
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let acc = Univ_map.singleton (Syntax.key lang.lang.syntax) lang.version in
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List.fold_left extensions ~init:acc
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~f:(fun acc (ext : Extension.instance) ->
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Univ_map.add acc (Syntax.key ext.extension.syntax) ext.version)
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let key = Univ_map.Key.create ()
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let set t = Sexp.Of_sexp.set key t
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let get_exn () =
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@ -197,12 +227,15 @@ let get_local_path p =
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| Local p -> p
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let anonymous = lazy (
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let lang = Lang.get_exn "dune" in
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let parsing_context = make_parsing_context ~lang ~extensions:[] in
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{ kind = Dune
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; name = Name.anonymous_root
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; packages = Package.Name.Map.empty
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; root = get_local_path Path.root
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; version = None
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; stanza_parser = Sexp.Of_sexp.sum (snd (Lang.latest "dune"))
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; stanza_parser =
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Sexp.Of_sexp.(set_many parsing_context (sum lang.lang.stanzas))
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; project_file = None
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})
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@ -230,7 +263,7 @@ let name ~dir ~packages =
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| Some x -> return x
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| None -> return (default_name ~dir ~packages)
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let parse ~dir ~lang_stanzas ~packages ~file =
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let parse ~dir ~lang ~packages ~file =
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record
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(name ~dir ~packages >>= fun name ->
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field_o "version" string >>= fun version ->
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@ -238,15 +271,26 @@ let parse ~dir ~lang_stanzas ~packages ~file =
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(loc >>= fun loc ->
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located string >>= fun name ->
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located Syntax.Version.t >>= fun ver ->
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Extension.lookup name ver >>= fun stanzas ->
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return (snd name, (loc, stanzas)))
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(* We don't parse the arguments quite yet as we want to set
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the version of extensions before parsing them. *)
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capture >>= fun parse_args ->
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return (Extension.instantiate ~loc ~parse_args name ver))
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>>= fun extensions ->
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let extensions_stanzas =
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match String.Map.of_list extensions with
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| Error (name, _, (loc, _)) ->
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match
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String.Map.of_list
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(List.map extensions ~f:(fun (e : Extension.instance) ->
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(Syntax.name e.extension.syntax, e.loc)))
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with
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| Error (name, _, loc) ->
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Loc.fail loc "Extension %S specified for the second time." name
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| Ok _ ->
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List.concat_map extensions ~f:(fun (_, (_, x)) -> x)
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let parsing_context = make_parsing_context ~lang ~extensions in
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let stanzas =
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List.concat
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(lang.lang.stanzas ::
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List.map extensions ~f:(fun (ext : Extension.instance) ->
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ext.parse_args
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(Sexp.Of_sexp.set_many parsing_context ext.extension.stanzas)))
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in
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return
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{ kind = Dune
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@ -254,25 +298,28 @@ let parse ~dir ~lang_stanzas ~packages ~file =
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; root = get_local_path dir
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; version
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; packages
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; stanza_parser = Sexp.Of_sexp.sum (lang_stanzas @ extensions_stanzas)
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; stanza_parser = Sexp.Of_sexp.(set_many parsing_context (sum stanzas))
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; project_file = Some file
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})
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let load_dune_project ~dir packages =
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let fname = Path.relative dir filename in
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Io.with_lexbuf_from_file fname ~f:(fun lb ->
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let lang_stanzas = Lang.parse (Dune_lexer.first_line lb) in
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let lang = Lang.parse (Dune_lexer.first_line lb) in
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let sexp = Sexp.Parser.parse lb ~mode:Many_as_one in
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Sexp.Of_sexp.parse (parse ~dir ~lang_stanzas ~packages ~file:fname)
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Sexp.Of_sexp.parse (parse ~dir ~lang ~packages ~file:fname)
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Univ_map.empty sexp)
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let make_jbuilder_project ~dir packages =
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let lang = Lang.get_exn "dune" in
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let parsing_context = make_parsing_context ~lang ~extensions:[] in
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{ kind = Jbuilder
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; name = default_name ~dir ~packages
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; root = get_local_path dir
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; version = None
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; packages
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; stanza_parser = Sexp.Of_sexp.sum (snd (Lang.latest "dune"))
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; stanza_parser =
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Sexp.Of_sexp.(set_many parsing_context (sum lang.lang.stanzas))
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; project_file = None
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}
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@ -311,8 +358,8 @@ let project_file t =
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| Some file -> file
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| None ->
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let file = Path.relative (Path.of_local t.root) filename in
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let maj, min = fst (Lang.latest "dune") in
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let s = sprintf "(lang dune %d.%d)" maj min in
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let ver = (Lang.get_exn "dune").version in
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let s = sprintf "(lang dune %s)" (Syntax.Version.to_string ver) in
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notify_user
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(sprintf "creating file %s with this contents: %s"
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(Path.to_string_maybe_quoted file) s);
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@ -41,42 +41,25 @@ type t = private
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}
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module Lang : sig
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(** One version of a language *)
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type t
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(** [make version stanzas_parser] defines one version of a
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language. Users will select this language by writing:
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(** [register id stanzas_parser] register a new language. Users will
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select this language by writing:
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{[ (lang <name> <version>) ]}
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as the first line of their [dune-project] file. [stanza_parsers]
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defines what stanzas the user can write in [dune] files. *)
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val make : Syntax.Version.t -> Stanza.Parser.t list -> t
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val version : t -> Syntax.Version.t
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(** Register all the supported versions of a language *)
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val register : string -> t list -> unit
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(** Latest version of the following language *)
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val latest : string -> t
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val register : Syntax.t -> Stanza.Parser.t list -> unit
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end
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module Extension : sig
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(** One version of an extension *)
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type t
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(** [make version parser] defines one version of an extension. Users will
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(** [register id parser] registers a new extension. Users will
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enable this extension by writing:
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{[ (using <name> <version> <args>) ]}
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in their [dune-project] file. [parser] is used to describe
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what [<args>] might be. *)
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val make : Syntax.Version.t -> Stanza.Parser.t list Sexp.Of_sexp.t -> t
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(** Register all the supported versions of an extension *)
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val register : string -> t list -> unit
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val register : Syntax.t -> Stanza.Parser.t list Sexp.Of_sexp.t -> unit
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end
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(** Load a project description from the following directory. [files]
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@ -22,6 +22,14 @@ module Backend = struct
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let loc t = t.loc
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(* The syntax of the driver sub-system is part of the main dune
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syntax, so we simply don't create a new one.
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If we wanted to make the ppx system an extension, then we
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would create a new one.
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*)
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let syntax = Jbuild.syntax
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open Sexp.Of_sexp
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let parse =
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@ -41,11 +49,6 @@ module Backend = struct
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; generate_runner
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; extends
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})
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let parsers =
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Syntax.Versioned_parser.make
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[ (1, 0), parse
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]
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end
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type t =
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@ -125,6 +128,8 @@ include Sub_system.Register_end_point(
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let loc t = t.loc
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let backends t = Option.map t.backend ~f:(fun x -> [x])
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let syntax = Jbuild.syntax
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open Sexp.Of_sexp
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let parse =
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@ -145,11 +150,6 @@ include Sub_system.Register_end_point(
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; backend
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; libraries
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})
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let parsers =
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Syntax.Versioned_parser.make
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[ (1, 0), parse
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]
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end
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let gen_rules c ~(info:Info.t) ~backends =
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@ -20,12 +20,11 @@ let parse_sub_systems sexps =
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Loc.fail loc "%S present twice" (Sub_system_name.to_string name))
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|> Sub_system_name.Map.mapi ~f:(fun name (_, version, data) ->
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let (module M) = Jbuild.Sub_system_info.get name in
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let vloc, ver = version in
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let parser =
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Syntax.Versioned_parser.find_exn M.parsers ~loc:vloc
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~data_version:ver
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Syntax.check_supported M.syntax version;
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let parsing_context =
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Univ_map.singleton (Syntax.key M.syntax) (snd version)
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in
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M.T (Sexp.Of_sexp.parse parser Univ_map.empty data))
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M.T (Sexp.Of_sexp.parse M.parse parsing_context data))
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let of_sexp =
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let open Sexp.Of_sexp in
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@ -5,6 +5,12 @@ open Sexp.Of_sexp
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syntax for the various supported version of the specification.
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*)
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let syntax =
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Syntax.create ~name:"dune"
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[ (0, 0) (* Jbuild syntax *)
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; (1, 0)
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]
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(* Deprecated *)
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module Jbuild_version = struct
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type t =
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@ -577,7 +583,8 @@ module Sub_system_info = struct
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type sub_system += T of t
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val name : Sub_system_name.t
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val loc : t -> Loc.t
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val parsers : t Sexp.Of_sexp.t Syntax.Versioned_parser.t
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val syntax : Syntax.t
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val parse : t Sexp.Of_sexp.t
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end
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let all = Sub_system_name.Table.create ~default_value:None
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@ -588,8 +595,6 @@ module Sub_system_info = struct
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module Register(M : S) : sig end = struct
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open M
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let parse = snd (Syntax.Versioned_parser.last M.parsers)
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let () =
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match Sub_system_name.Table.get all name with
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| Some _ ->
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@ -1346,10 +1351,7 @@ module Stanzas = struct
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]
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let () =
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let open Dune_project.Lang in
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register "dune"
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[ make (1, 0) dune
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]
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Dune_project.Lang.register syntax dune
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exception Include_loop of Path.t * (Loc.t * Path.t) list
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@ -2,6 +2,11 @@
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open Import
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(** Syntax identifier for the Dune language. [(0, X)] correspond to
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the Jbuild language while versions from [(1, 0)] correspond to the
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Dune one. *)
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val syntax : Syntax.t
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(** Ppx preprocessors *)
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module Pp : sig
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type t = private string
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@ -139,10 +144,14 @@ module Sub_system_info : sig
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(** Name of the sub-system *)
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val name : Sub_system_name.t
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(** Location of the S-expression passed to [of_sexp] or [short]. *)
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(** Location of the parameters in the jbuild/dune file. *)
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val loc : t -> Loc.t
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val parsers : t Sexp.Of_sexp.t Syntax.Versioned_parser.t
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(** Syntax for jbuild/dune files *)
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val syntax : Syntax.t
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(** Parse parameters written by the user in jbuid/dune files *)
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val parse : t Sexp.Of_sexp.t
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end
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module Register(M : S) : sig end
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|
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@ -32,6 +32,14 @@ module Driver = struct
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let loc t = t.loc
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(* The syntax of the driver sub-system is part of the main dune
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syntax, so we simply don't create a new one.
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|
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If we wanted to make the ppx system an extension, then we
|
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would create a new one.
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*)
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let syntax = Jbuild.syntax
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open Sexp.Of_sexp
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let parse =
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|
@ -49,10 +57,6 @@ module Driver = struct
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; main
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; replaces
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})
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let parsers =
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Syntax.Versioned_parser.make
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[ (1, 0), parse ]
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end
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(* The [lib] field is lazy so that we don't need to fill it for
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|
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@ -23,38 +23,71 @@ module Version = struct
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pa = da && db <= pb
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end
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module Versioned_parser = struct
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type 'a t = (int * 'a) Int.Map.t
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module Supported_versions = struct
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type t = int Int.Map.t
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let make l =
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if List.is_empty l then
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Exn.code_error "Syntax.Versioned_parser.make got empty list" [];
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let make l : t =
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match
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List.map l ~f:(fun ((major, minor), p) -> (major, (minor, p)))
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List.map l ~f:(fun (major, minor) -> (major, minor))
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|> Int.Map.of_list
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with
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| Ok x -> x
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| Error _ ->
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Exn.code_error
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"Syntax.Versioned_parser.make"
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[ "versions", Sexp.To_sexp.list Version.sexp_of_t (List.map l ~f:fst) ]
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"Syntax.create"
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[ "versions", Sexp.To_sexp.list Version.sexp_of_t l ]
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let last t =
|
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let major, (minor, p) = Option.value_exn (Int.Map.max_binding t) in
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((major, minor), p)
|
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let greatest_supported_version t = Option.value_exn (Int.Map.max_binding t)
|
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|
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let find_exn t ~loc ~data_version:(major, minor) =
|
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match
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Option.bind (Int.Map.find t major) ~f:(fun (minor', p) ->
|
||||
Option.some_if (minor' >= minor) p)
|
||||
with
|
||||
| None ->
|
||||
Loc.fail loc "Version %s is not supported.\n\
|
||||
let is_supported t (major, minor) =
|
||||
match Int.Map.find t major with
|
||||
| Some minor' -> minor' >= minor
|
||||
| None -> false
|
||||
|
||||
let supported_ranges t =
|
||||
Int.Map.to_list t |> List.map ~f:(fun (major, minor) ->
|
||||
((major, 0), (major, minor)))
|
||||
end
|
||||
|
||||
type t =
|
||||
{ name : string
|
||||
; key : Version.t Univ_map.Key.t
|
||||
; supported_versions : Supported_versions.t
|
||||
}
|
||||
|
||||
let create ~name supported_versions =
|
||||
{ name
|
||||
; key = Univ_map.Key.create ()
|
||||
; supported_versions = Supported_versions.make supported_versions
|
||||
}
|
||||
|
||||
let name t = t.name
|
||||
|
||||
let check_supported t (loc, ver) =
|
||||
if not (Supported_versions.is_supported t.supported_versions ver) then
|
||||
Loc.fail loc "Version %s of %s is not supported.\n\
|
||||
Supported versions:\n\
|
||||
%s"
|
||||
(Version.to_string (major, minor))
|
||||
(Version.to_string ver) t.name
|
||||
(String.concat ~sep:"\n"
|
||||
(Int.Map.to_list t |> List.map ~f:(fun (major, (minor, _)) ->
|
||||
sprintf "- %u.0 to %u.%u" major major minor)))
|
||||
| Some p -> p
|
||||
end
|
||||
(List.map (Supported_versions.supported_ranges t.supported_versions)
|
||||
~f:(fun (a, b) ->
|
||||
sprintf "- %s to %s"
|
||||
(Version.to_string a)
|
||||
(Version.to_string b))))
|
||||
|
||||
let greatest_supported_version t =
|
||||
Supported_versions.greatest_supported_version t.supported_versions
|
||||
|
||||
let key t = t.key
|
||||
|
||||
let set t ver parser =
|
||||
Sexp.Of_sexp.set t.key ver parser
|
||||
|
||||
let get_exn t =
|
||||
let open Sexp.Of_sexp in
|
||||
get t.key >>| function
|
||||
| Some x -> x
|
||||
| None ->
|
||||
Exn.code_error "Syntax identifier is unset"
|
||||
[ "name", Sexp.To_sexp.string t.name ]
|
||||
|
|
|
@ -1,5 +1,6 @@
|
|||
(** Management of syntaxes *)
|
||||
|
||||
open Stdune
|
||||
(** Versioned syntaxes *)
|
||||
|
||||
module Version : sig
|
||||
(** A syntax version.
|
||||
|
@ -11,20 +12,33 @@ module Version : sig
|
|||
|
||||
include Sexp.Sexpable with type t := t
|
||||
|
||||
val to_string : t -> string
|
||||
|
||||
(** Whether the parser can read the data or not *)
|
||||
val can_read : parser_version:t -> data_version:t -> bool
|
||||
end
|
||||
|
||||
module Versioned_parser : sig
|
||||
(** Versioned parser *)
|
||||
type 'a t
|
||||
type t
|
||||
|
||||
(** Create a versionned parser. There must be exactly one parser per
|
||||
major version. *)
|
||||
val make : (Version.t * 'a) list -> 'a t
|
||||
(** [create ~name supported_versions] defines a new
|
||||
syntax. [supported_version] is the list of the last minor version
|
||||
of each supported major version. *)
|
||||
val create : name:string -> Version.t list -> t
|
||||
|
||||
val last : 'a t -> Version.t * 'a
|
||||
(** Return the name of the syntax. *)
|
||||
val name : t -> string
|
||||
|
||||
(** Find a parser that can parse data of this version *)
|
||||
val find_exn : 'a t -> loc:Loc.t -> data_version:Version.t -> 'a
|
||||
end
|
||||
(** Check that the given version is supported and raise otherwise. *)
|
||||
val check_supported : t -> Loc.t * Version.t -> unit
|
||||
|
||||
val greatest_supported_version : t -> Version.t
|
||||
|
||||
val set
|
||||
: t
|
||||
-> Version.t
|
||||
-> ('a, 'k) Sexp.Of_sexp.parser
|
||||
-> ('a, 'k) Sexp.Of_sexp.parser
|
||||
|
||||
val get_exn : t -> (Version.t, 'k) Sexp.Of_sexp.parser
|
||||
|
||||
val key : t -> Version.t Univ_map.Key.t
|
||||
|
|
Loading…
Reference in New Issue