package merlin-lib
Merlin's libraries
Install
Dune Dependency
Authors
Maintainers
Sources
merlin-5.5-503.tbz
sha256=67da3b34f2fea07678267309f61da4a2c6f08298de0dc59655b8d30fd8269af1
sha512=1fb3b5180d36aa82b82a319e15b743b802b6888f0dc67645baafdb4e18dfc23a7b90064ec9bc42f7424061cf8cde7f8839178d8a8537bf4596759f3ff4891873
doc/src/merlin-lib.dot_protocol/merlin_dot_protocol.ml.html
Source file merlin_dot_protocol.ml
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(* {{{ COPYING *( This file is part of Merlin, an helper for ocaml editors Copyright (C) 2019 Frédéric Bour <frederic.bour(_)lakaban.net> Thomas Refis <refis.thomas(_)gmail.com> Simon Castellan <simon.castellan(_)iuwt.fr> Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. The Software is provided "as is", without warranty of any kind, express or implied, including but not limited to the warranties of merchantability, fitness for a particular purpose and noninfringement. In no event shall the authors or copyright holders be liable for any claim, damages or other liability, whether in an action of contract, tort or otherwise, arising from, out of or in connection with the software or the use or other dealings in the Software. )* }}} *) open Merlin_utils.Std open Merlin_utils.Std.Result module Directive = struct type include_path = [ `B of string | `S of string | `BH of string | `SH of string | `CMI of string | `CMT of string | `INDEX of string ] type no_processing_required = [ `EXT of string list | `FLG of string list | `STDLIB of string | `SOURCE_ROOT of string | `UNIT_NAME of string | `WRAPPING_PREFIX of string | `SUFFIX of string | `READER of string list | `EXCLUDE_QUERY_DIR | `USE_PPX_CACHE | `UNKNOWN_TAG of string ] module Processed = struct type acceptable_in_input = [ include_path | no_processing_required ] type t = [ acceptable_in_input | `ERROR_MSG of string ] end module Raw = struct type t = [ Processed.acceptable_in_input | `PKG of string list | `FINDLIB of string | `FINDLIB_PATH of string | `FINDLIB_TOOLCHAIN of string ] end end type directive = Directive.Processed.t module Sexp = struct type t = Csexp.t = Atom of string | List of t list let atoms_of_strings = List.map ~f:(fun s -> Atom s) let strings_of_atoms = List.filter_map ~f:(function | Atom s -> Some s | _ -> None) let rec to_string = function | Atom s -> s | List l -> String.concat ~sep:" " (List.concat [ [ "(" ]; List.map ~f:to_string l; [ ")" ] ]) let to_directive sexp = match sexp with | List [ Atom tag; Atom value ] -> begin match tag with | "S" -> `S value | "B" -> `B value | "SH" -> `SH value | "BH" -> `BH value | "CMI" -> `CMI value | "CMT" -> `CMT value | "INDEX" -> `INDEX value | "STDLIB" -> `STDLIB value | "SOURCE_ROOT" -> `SOURCE_ROOT value | "UNIT_NAME" -> `UNIT_NAME value | "WRAPPING_PREFIX" -> `WRAPPING_PREFIX value | "SUFFIX" -> `SUFFIX value | "ERROR" -> `ERROR_MSG value | "FLG" -> (* This means merlin asked dune 2.6 for configuration. But the protocole evolved, only dune 2.8 should be used *) `ERROR_MSG "No .merlin file found. Try building the project." | tag -> `UNKNOWN_TAG tag end | List [ Atom tag; List l ] -> let value = strings_of_atoms l in begin match tag with | "EXT" -> `EXT value | "FLG" -> `FLG value | "READER" -> `READER value | tag -> `UNKNOWN_TAG tag end | List [ Atom "EXCLUDE_QUERY_DIR" ] -> `EXCLUDE_QUERY_DIR | List [ Atom "USE_PPX_CACHE" ] -> `USE_PPX_CACHE | _ -> `ERROR_MSG "Unexpected output from external config reader" let from_directives (directives : Directive.Processed.t list) = let f t = let tag, body = let single s = [ Atom s ] in match t with | `B s -> ("B", single s) | `S s -> ("S", single s) | `BH s -> ("BH", single s) | `SH s -> ("SH", single s) | `CMI s -> ("CMI", single s) | `CMT s -> ("CMT", single s) | `INDEX s -> ("INDEX", single s) | `SOURCE_ROOT s -> ("SOURCE_ROOT", single s) | `UNIT_NAME s -> ("UNIT_NAME", single s) | `WRAPPING_PREFIX s -> ("WRAPPING_PREFIX", single s) | `EXT ss -> ("EXT", [ List (atoms_of_strings ss) ]) | `FLG ss -> ("FLG", [ List (atoms_of_strings ss) ]) | `STDLIB s -> ("STDLIB", single s) | `SUFFIX s -> ("SUFFIX", single s) | `READER ss -> ("READER", [ List (atoms_of_strings ss) ]) | `EXCLUDE_QUERY_DIR -> ("EXCLUDE_QUERY_DIR", []) | `USE_PPX_CACHE -> ("USE_PPX_CACHE", []) | `UNKNOWN_TAG tag -> ("ERROR", single @@ Printf.sprintf "Unknown tag in .merlin: %s" tag) | `ERROR_MSG s -> ("ERROR", single s) in List (Atom tag :: body) in List (List.map ~f directives) end type read_error = Unexpected_output of string | Csexp_parse_error of string type command = File of string | Halt | Unknown module type S = sig type 'a io type in_chan type out_chan (** [read] reads one csexp from the channel and returns the list of directives it represents *) val read : in_chan -> (directive list, read_error) Merlin_utils.Std.Result.t io val write : out_chan -> directive list -> unit io module Commands : sig val read_input : in_chan -> command io val send_file : out_chan -> string -> unit io val halt : out_chan -> unit io end end module Make (IO : sig type 'a t module O : sig val ( let+ ) : 'a t -> ('a -> 'b) -> 'b t end end) (Chan : sig type in_chan type out_chan val read : in_chan -> (Csexp.t, string) result IO.t val write : out_chan -> Csexp.t -> unit IO.t end) = struct type 'a io = 'a IO.t type in_chan = Chan.in_chan type out_chan = Chan.out_chan module Commands = struct let read_input chan = let open Sexp in let open IO.O in let+ input = Chan.read chan in match input with | Ok (List [ Atom "File"; Atom path ]) -> File path | Ok (Atom "Halt") -> Halt | Ok _ -> Unknown | Error _ -> Halt let send_file chan path = Chan.write chan Sexp.(List [ Atom "File"; Atom path ]) let halt chan = Chan.write chan (Sexp.Atom "Halt") end let read chan = let open IO.O in let+ res = Chan.read chan in match res with | Ok (Sexp.List directives) -> Ok (List.map directives ~f:Sexp.to_directive) | Ok sexp -> let msg = Printf.sprintf "A list of directives was expected, instead got: \"%s\"" (Sexp.to_string sexp) in Error (Unexpected_output msg) | Error msg -> Error (Csexp_parse_error msg) let write out_chan (directives : directive list) = directives |> Sexp.from_directives |> Chan.write out_chan end module Blocking = Make (struct type 'a t = 'a module O = struct let ( let+ ) x f = f x end end) (struct type in_chan = in_channel type out_chan = out_channel let read = Csexp.input let write = Csexp.to_channel end)
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