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(** Getting information from ocaml-generated .cmt files. *)
let () = Compmisc.init_path ()
let load_cmt file =
try Result.Ok (Cmt_format.read_cmt file)
with e ->
let msg = Printexc.to_string e in
Result.Error msg
type lookup_res = {
loc: Location.t ;
path: Path.t option ;
typ: Types.type_expr ;
def: Location.t option ; }
let pos_in_loc (fname, p) loc =
Misc.safe_same_files loc.Location.loc_start.Lexing.pos_fname fname
&& loc.loc_start.pos_cnum <= p
&& loc.loc_end.pos_cnum >= p
let apply_mapper mapper = function
| Cmt_format.Partial_structure str -> ignore(Untypeast.untype_structure ~mapper str)
| Partial_structure_item stri -> ignore(mapper.Untypeast.structure_item mapper stri)
| Partial_expression e -> ignore(Untypeast.untype_expression ~mapper e)
| Partial_pattern (_, p) -> ignore(Untypeast.untype_pattern ~mapper p)
| Partial_class_expr c -> ignore(mapper.Untypeast.class_expr mapper c)
| Partial_signature s -> ignore(Untypeast.untype_signature ~mapper s)
| Partial_signature_item si -> ignore(mapper.Untypeast.signature_item mapper si)
| Partial_module_type mt -> ignore(mapper.Untypeast.module_type mapper mt)
let lookup_in_binary_part pos binary_part =
let best = ref None in
let set_best res =
match !best with
| None -> best := Some res
| Some r ->
let wr = r.loc.loc_end.pos_cnum - r.loc.loc_start.pos_cnum in
let wres = res.loc.loc_end.pos_cnum - res.loc.loc_start.pos_cnum in
if wres < wr then
best := Some res
in
let open Typedtree in
let defmap = Untypeast.default_mapper in
let expr mapper exp =
if pos_in_loc pos exp.exp_loc then
(
let (def,path) =
match exp.exp_desc with
| Texp_ident (path, { loc }, tval_desc) ->
let def =
try
let env =
try Env.env_of_only_summary
Envaux.env_from_summary exp.exp_env
with
Envaux.Error e ->
let b = Buffer.create 256 in
let fmt = Format.formatter_of_buffer b in
Envaux.report_error fmt e;
Format.pp_print_flush fmt () ;
Log.err (fun m -> m "%s" (Buffer.contents b));
exp.exp_env
in
let desc = Env.find_value path env in
let dloc = desc.Types.val_loc in
if dloc.Location.loc_ghost then None
else Some dloc
with
Not_found -> None
in
(def, Some path)
| _ -> (None, None)
in
set_best { loc = exp.exp_loc ;
path ;
typ = exp.exp_type; def ;
} ;
defmap.Untypeast.expr mapper exp
)
else
defmap.Untypeast.expr mapper exp
in
let pat mapper p =
let loc = p.pat_loc in
if pos_in_loc pos loc then
(
let typ = p.pat_type in
set_best { loc ; path = None ; typ ; def = None }
);
defmap.Untypeast.pat mapper p
in
let mapper = { defmap with
expr ; pat
}
in
apply_mapper mapper binary_part;
!best
let cmt_parts cmt =
match cmt.Cmt_format.cmt_annots with
| Implementation str -> [Cmt_format.Partial_structure str]
| Partial_implementation arr -> Array.to_list arr
| _ -> []
let lookup_by_pos pos cmt =
Envaux.reset_cache ();
List.iter (Load_path.add_dir ~hidden:false) cmt.Cmt_format.cmt_loadpath.visible;
List.iter (Load_path.add_dir ~hidden:true) cmt.Cmt_format.cmt_loadpath.hidden;
match cmt_parts cmt with
| [] -> None
| l ->
let rec iter = function
| [] -> None
| h :: q ->
match lookup_in_binary_part pos h with
| None -> iter q
| x -> x
in
iter l
let fold_exp_idents f acc cmt =
Envaux.reset_cache ();
List.iter (Load_path.add_dir ~hidden:false) cmt.Cmt_format.cmt_loadpath.visible;
List.iter (Load_path.add_dir ~hidden:true) cmt.Cmt_format.cmt_loadpath.hidden;
let parts = cmt_parts cmt in
let idents = ref [] in
let open Typedtree in
let defmap = Untypeast.default_mapper in
let expr mapper exp =
let () =
match exp.exp_desc with
| Texp_ident (path, { loc }, tval_desc) ->
let defloc =
try
let env =
try Env.env_of_only_summary
Envaux.env_from_summary exp.exp_env
with
Envaux.Error e ->
let b = Buffer.create 256 in
let fmt = Format.formatter_of_buffer b in
Envaux.report_error fmt e;
Format.pp_print_flush fmt () ;
Log.err (fun m -> m "%s" (Buffer.contents b));
exp.exp_env
in
let desc = Env.find_value path env in
let dloc = desc.Types.val_loc in
if dloc.Location.loc_ghost then None
else Some dloc
with
Not_found -> None
in
idents := (path, loc, defloc) :: !idents
| _ ->
()
in
defmap.Untypeast.expr mapper exp
in
let mapper = { defmap with expr } in
List.iter (apply_mapper mapper) parts ;
let l = List.rev !idents in
List.fold_left f acc l