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uTop_complete.ml
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uTop_complete.ml
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(*
* uTop_complete.ml
* ----------------
* Copyright : (c) 2011, Jeremie Dimino <[email protected]>
* Licence : BSD3
*
* This file is a part of utop.
*)
[@@@warning "-9-27-32"]
open Types
open LTerm_read_line
open UTop_compat
open UTop_token
module String_set = Set.Make(String)
module String_map = Map.Make(String)
let set_of_list = List.fold_left (fun set x -> String_set.add x set) String_set.empty
(* +-----------------------------------------------------------------+
| Utils |
+-----------------------------------------------------------------+ *)
(* Transform a non-empty list of strings into a long-identifier. *)
let longident_of_list = function
| [] ->
invalid_arg "UTop_complete.longident_of_list"
| component :: rest ->
let rec loop acc = function
| [] -> acc
| component :: rest -> loop (Longident.Ldot(acc, component)) rest
in
loop (Longident.Lident component) rest
(* Check whether an identifier is a valid one. *)
let is_valid_identifier id =
id <> "" &&
(match id.[0] with
| 'A' .. 'Z' | 'a' .. 'z' | '_' -> true
| _ -> false)
let add id set = if is_valid_identifier id then String_set.add id set else set
let lookup_env f x env =
try
Some (f x env)
with Not_found | Env.Error _ ->
None
(* +-----------------------------------------------------------------+
| Parsing |
+-----------------------------------------------------------------+ *)
(* The following functions takes a list of tokens in reverse order. *)
type value_or_field = Value | Field
(* Either a value, or a record field. *)
(* Parse something of the form [M1.M2. ... .Mn.id] or
[field.M1.M2. ... .Mn.id] *)
let parse_longident tokens =
let rec loop acc tokens =
match tokens with
| (Symbol ".", _) :: (Uident id, _) :: tokens ->
loop (id :: acc) tokens
| (Symbol ".", _) :: (Lident id, _) :: tokens ->
(Field,
match acc with
| [] -> None
| l -> Some (longident_of_list l))
| _ ->
(Value,
match acc with
| [] -> None
| l -> Some (longident_of_list l))
in
match tokens with
| ((Comment (_, false) | String (_, false) | Quotation (_, false)), _) :: _ ->
(* An unterminated command, string, or quotation. *)
None
| ((Uident id | Lident id), { idx1 = start }) :: tokens ->
(* An identifier. *)
let kind, path = loop [] tokens in
Some (kind, path, start, id)
| (Blanks, { idx2 = stop }) :: tokens ->
(* Some blanks at the end. *)
let kind, path = loop [] tokens in
Some (kind, path, stop, "")
| (_, { idx2 = stop }) :: _ ->
(* Otherwise complete after the last token. *)
let kind, path = loop [] tokens in
Some (kind, path, stop, "")
| [] ->
None
(* Parse something of the form [M1.M2. ... .Mn.id#m1#m2# ... #mp#m] *)
let parse_method tokens =
(* Collect [M1.M2. ... .Mn.id] and returns the corresponding
longidentifier. *)
let rec loop_uidents acc tokens =
match tokens with
| (Symbol ".", _) :: (Uident id, _) :: tokens ->
loop_uidents (id :: acc) tokens
| _ ->
longident_of_list acc
in
(* Collect [m1#m2# ... #mp] *)
let rec loop_methods acc tokens =
match tokens with
| (Lident meth, _) :: (Symbol "#", _) :: tokens ->
loop_methods (meth :: acc) tokens
| (Lident id, _) :: tokens ->
Some (loop_uidents [id] tokens, acc)
| _ ->
None
in
match tokens with
| (Lident meth, { idx1 = start }) :: (Symbol "#", _) :: tokens -> begin
match loop_methods [] tokens with
| None -> None
| Some (path, meths) -> Some (path, meths, start, meth)
end
| (Symbol "#", { idx2 = stop }) :: tokens
| (Blanks, { idx2 = stop }) :: (Symbol "#", _) :: tokens -> begin
match loop_methods [] tokens with
| None -> None
| Some (path, meths) -> Some (path, meths, stop, "")
end
| _ ->
None
type label_kind = Required | Optional
(* Kind of labels: required or optional. *)
type fun_or_new = Fun | New
(* Either a function application, either an object creation. *)
(* Parse something of the form [M1.M2. ... .Mn.id#m1#m2# ... #mp expr1 ... exprq ~label]
or [new M1.M2. ... .Mn.id expr1 ... exprq ~label] *)
let parse_label tokens =
(* Collect [M1.M2. ... .Mn] *)
let rec loop_uidents acc_uidents acc_methods tokens =
match tokens with
| (Lident "new", _) :: _ ->
Some (New, longident_of_list acc_uidents, acc_methods)
| ((Lident id | Uident id), _) :: _ when String_set.mem id !UTop.keywords ->
Some (Fun, longident_of_list acc_uidents, acc_methods)
| (Symbol ".", _) :: (Uident id, _) :: tokens ->
loop_uidents (id :: acc_uidents) acc_methods tokens
| (Symbol ("~" | "?" | ":" | "." | "#" | "!" | "`"), _) :: tokens ->
search tokens
| (Symbol ")", _) :: tokens ->
skip tokens "(" []
| (Symbol "}", _) :: tokens ->
skip tokens "{" []
| (Symbol "]", _) :: tokens ->
skip tokens "[" []
| (Symbol _, _) :: _ ->
Some (Fun, longident_of_list acc_uidents, acc_methods)
| [] ->
Some (Fun, longident_of_list acc_uidents, acc_methods)
| _ ->
search tokens
and loop_methods acc tokens =
match tokens with
| ((Lident id | Uident id), _) :: _ when String_set.mem id !UTop.keywords ->
None
| (Symbol ("~" | "?" | ":" | "." | "#" | "!" | "`"), _) :: tokens ->
search tokens
| (Symbol ")", _) :: tokens ->
skip tokens "(" []
| (Symbol "}", _) :: tokens ->
skip tokens "{" []
| (Symbol "]", _) :: tokens ->
skip tokens "[" []
| (Symbol _, _) :: _ ->
None
| (Lident id, _) :: (Symbol "#", _) :: tokens ->
loop_methods (id :: acc) tokens
| (Lident id, _) :: tokens ->
loop_uidents [id] acc tokens
| [] ->
None
| _ ->
search tokens
and search tokens =
match tokens with
| ((Lident id | Uident id), _) :: _ when String_set.mem id !UTop.keywords ->
None
| (Symbol ("~" | "?" | ":" | "." | "#" | "!" | "`"), _) :: tokens ->
search tokens
| (Symbol ")", _) :: tokens ->
skip tokens "(" []
| (Symbol "}", _) :: tokens ->
skip tokens "{" []
| (Symbol "]", _) :: tokens ->
skip tokens "[" []
| (Symbol _, _) :: _ ->
None
| (Lident id, _) :: (Symbol "#", _) :: tokens ->
loop_methods [id] tokens
| (Lident id, _) :: tokens ->
loop_uidents [id] [] tokens
| _ :: tokens ->
search tokens
| [] ->
None
and skip tokens top stack =
match tokens with
| (Symbol symbol, _) :: tokens when symbol = top -> begin
match stack with
| [] -> search tokens
| top :: stack -> skip tokens top stack
end
| (Symbol ")", _) :: tokens ->
skip tokens "(" (top :: stack)
| (Symbol "}", _) :: tokens ->
skip tokens "{" (top :: stack)
| (Symbol "]", _) :: tokens ->
skip tokens "[" (top :: stack)
| _ :: tokens ->
skip tokens top stack
| [] ->
None
in
match tokens with
| (Lident label, { idx1 = start }) :: (Symbol "~", _) :: tokens -> begin
match search tokens with
| None -> None
| Some (kind, id, meths) -> Some (kind, id, meths, Required, start, label)
end
| (Symbol "~", { idx2 = stop }) :: tokens -> begin
match search tokens with
| None -> None
| Some (kind, id, meths) -> Some (kind, id, meths, Required, stop, "")
end
| (Lident label, { idx1 = start }) :: (Symbol "?", _) :: tokens -> begin
match search tokens with
| None -> None
| Some (kind, id, meths) -> Some (kind, id, meths, Optional, start, label)
end
| (Symbol "?", { idx2 = stop }) :: tokens -> begin
match search tokens with
| None -> None
| Some (kind, id, meths) -> Some (kind, id, meths, Optional, stop, "")
end
| _ ->
None
(* +-----------------------------------------------------------------+
| Directive listing |
+-----------------------------------------------------------------+ *)
let list_directives phrase_terminator =
String_map.bindings
(List.fold_left
(fun map dir ->
let suffix =
match toploop_get_directive dir with
| Some (Toploop.Directive_none _) -> phrase_terminator
| Some (Toploop.Directive_string _) -> " \""
| Some (Toploop.Directive_bool _ | Toploop.Directive_int _ | Toploop.Directive_ident _) -> " "
| None -> assert false
in
String_map.add dir suffix map)
String_map.empty
(toploop_all_directive_names ()))
(* +-----------------------------------------------------------------+
| File listing |
+-----------------------------------------------------------------+ *)
type file_kind = Directory | File
let basename name =
let name' = Filename.basename name in
if name' = "." && not (Zed_utf8.ends_with name ".") then
""
else
name'
let add_files filter acc dir =
Array.fold_left
(fun map name ->
let absolute_name = Filename.concat dir name in
if try Sys.is_directory absolute_name with Sys_error _ -> false then
String_map.add (Filename.concat name "") Directory map
else if filter name then
String_map.add name File map
else
map)
acc
(try Sys.readdir dir with Sys_error _ -> [||])
let list_directories dir =
String_set.elements
(Array.fold_left
(fun set name ->
let absolute_name = Filename.concat dir name in
if try Sys.is_directory absolute_name with Sys_error _ -> false then
String_set.add name set
else
set)
String_set.empty
(try Sys.readdir (if dir = "" then Filename.current_dir_name else dir) with Sys_error _ -> [||]))
let path () =
let path_separator =
match Sys.os_type with
| "Unix" | "Cygwin" -> ':'
| "Win32" -> ';'
| _ -> assert false in
let split str sep =
let rec split_rec pos =
if pos >= String.length str then [] else begin
match try Some (String.index_from str pos sep)
with Not_found -> None with
| Some newpos ->
String.sub str pos (newpos - pos) ::
split_rec (newpos + 1)
| None ->
[String.sub str pos (String.length str - pos)]
end in
split_rec 0
in
try
split (Sys.getenv "PATH") path_separator
with Not_found -> []
(* +-----------------------------------------------------------------+
| Names listing |
+-----------------------------------------------------------------+ *)
module Path_map = Map.Make(struct type t = Path.t let compare = compare end)
module Longident_map = Map.Make(struct type t = Longident.t let compare = compare end)
(* All names accessible without a path. *)
let global_names = ref None
let global_names_revised = ref None
(* All names accessible with a path, by path. *)
let local_names_by_path = ref Path_map.empty
(* All names accessible with a path, by long identifier. *)
let local_names_by_longident = ref Longident_map.empty
(* All record fields accessible without a path. *)
let global_fields = ref None
(* All record fields accessible with a path, by path. *)
let local_fields_by_path = ref Path_map.empty
(* All record fields accessible with a path, by long identifier. *)
let local_fields_by_longident = ref Longident_map.empty
(* All visible modules according to Config.load_path. *)
let visible_modules = ref None
let reset () =
visible_modules := None;
global_names := None;
global_names_revised := None;
local_names_by_path := Path_map.empty;
local_names_by_longident := Longident_map.empty;
global_fields := None;
local_fields_by_path := Path_map.empty;
local_fields_by_longident := Longident_map.empty
let get_cached var f =
match !var with
| Some x ->
x
| None ->
let x = f () in
var := Some x;
x
(* List all visible modules. *)
let visible_modules () =
get_cached visible_modules
(fun () ->
List.fold_left
(fun acc dir ->
try
Array.fold_left
(fun acc fname ->
if Filename.check_suffix fname ".cmi" then
String_set.add (String.capitalize_ascii (Filename.chop_suffix fname ".cmi")) acc
else
acc)
acc
(Sys.readdir (if dir = "" then Filename.current_dir_name else dir))
with Sys_error _ ->
acc)
String_set.empty @@ UTop_compat.get_load_path ()
)
let field_name { ld_id = id } = Ident.name id
let constructor_name { cd_id = id } = Ident.name id
let add_fields_of_type decl acc =
match decl.type_kind with
| Type_variant _ ->
acc
| Type_record (fields, _) ->
List.fold_left (fun acc field -> add (field_name field) acc) acc fields
#if OCAML_VERSION >= (5, 2, 0)
| Type_abstract _ ->
#else
| Type_abstract ->
#endif
acc
| Type_open ->
acc
let add_names_of_type decl acc =
match decl.type_kind with
#if OCAML_VERSION >= (4, 13, 0)
| Type_variant (constructors, _) ->
#else
| Type_variant constructors ->
#endif
List.fold_left (fun acc cstr -> add (constructor_name cstr) acc) acc constructors
| Type_record (fields, _) ->
List.fold_left (fun acc field -> add (field_name field) acc) acc fields
#if OCAML_VERSION >= (5, 2, 0)
| Type_abstract _ ->
#else
| Type_abstract ->
#endif
acc
| Type_open ->
acc
let path_of_mty_alias = function
| Mty_alias path -> path
| _ -> assert false
let rec names_of_module_type = function
| Mty_signature decls ->
List.fold_left
(fun acc decl -> match decl with
| Sig_value (id, _, _)
| Sig_typext (id, _, _, _)
| Sig_module (id, _, _, _, _)
| Sig_modtype (id, _, _)
| Sig_class (id, _, _, _)
| Sig_class_type (id, _, _, _) ->
add (Ident.name id) acc
| Sig_type (id, decl, _, _) ->
add_names_of_type decl (add (Ident.name id) acc))
String_set.empty decls
| Mty_ident path -> begin
match lookup_env Env.find_modtype path !Toploop.toplevel_env with
| Some { mtd_type = None } -> String_set.empty
| Some { mtd_type = Some module_type } -> names_of_module_type module_type
| None -> String_set.empty
end
| Mty_alias _ as mty_alias -> begin
let path = path_of_mty_alias mty_alias in
match lookup_env Env.find_module path !Toploop.toplevel_env with
| None -> String_set.empty
| Some { md_type = module_type } -> names_of_module_type module_type
end
| _ ->
String_set.empty
let rec fields_of_module_type = function
| Mty_signature decls ->
List.fold_left
(fun acc decl -> match decl with
| Sig_value _
| Sig_typext _
| Sig_module _
| Sig_modtype _
| Sig_class _
| Sig_class_type _ ->
acc
| Sig_type (_, decl, _, _) ->
add_fields_of_type decl acc)
String_set.empty decls
| Mty_ident path -> begin
match lookup_env Env.find_modtype path !Toploop.toplevel_env with
| Some { mtd_type = None } -> String_set.empty
| Some { mtd_type = Some module_type } -> fields_of_module_type module_type
| None -> String_set.empty
end
| Mty_alias _ as mty_alias -> begin
let path = path_of_mty_alias mty_alias in
match lookup_env Env.find_module path !Toploop.toplevel_env with
| None -> String_set.empty
| Some { md_type = module_type } -> fields_of_module_type module_type
end
| _ ->
String_set.empty
let find_module path env = (Env.find_module path env).md_type
let names_of_module longident =
try
Longident_map.find longident !local_names_by_longident
with Not_found ->
match lookup_env Env.find_module_by_name longident !Toploop.toplevel_env with
| Some(path, {md_type; _}) ->
let names = names_of_module_type md_type in
local_names_by_path := Path_map.add path names !local_names_by_path;
local_names_by_longident := Longident_map.add longident names !local_names_by_longident;
names
| None ->
local_names_by_longident := Longident_map.add longident String_set.empty !local_names_by_longident;
String_set.empty
let fields_of_module longident =
try
Longident_map.find longident !local_fields_by_longident
with Not_found ->
match lookup_env Env.find_module_by_name longident !Toploop.toplevel_env with
| Some(path, {md_type; _}) ->
let fields = fields_of_module_type md_type in
local_fields_by_path := Path_map.add path fields !local_fields_by_path;
local_fields_by_longident := Longident_map.add longident fields !local_fields_by_longident;
fields
| None ->
local_fields_by_longident := Longident_map.add longident String_set.empty !local_fields_by_longident;
String_set.empty
let list_global_names () =
let rec loop acc = function
| Env.Env_empty -> acc
| Env.Env_value_unbound _-> acc
| Env.Env_module_unbound _-> acc
| Env.Env_value(summary, id, _) ->
loop (add (Ident.name id) acc) summary
| Env.Env_type(summary, id, decl) ->
loop (add_names_of_type decl (add (Ident.name id) acc)) summary
| Env.Env_extension(summary, id, _) ->
loop (add (Ident.name id) acc) summary
| Env.Env_module(summary, id, _, _) ->
loop (add (Ident.name id) acc) summary
| Env.Env_modtype(summary, id, _) ->
loop (add (Ident.name id) acc) summary
| Env.Env_class(summary, id, _) ->
loop (add (Ident.name id) acc) summary
| Env.Env_cltype(summary, id, _) ->
loop (add (Ident.name id) acc) summary
| Env.Env_functor_arg(summary, id) ->
loop (add (Ident.name id) acc) summary
| Env.Env_persistent (summary, id) ->
loop (add (Ident.name id) acc) summary
| Env.Env_constraints (summary, _) ->
loop acc summary
| Env.Env_copy_types summary ->
loop acc summary
| Env.Env_open(summary, path) ->
match try Some (Path_map.find path !local_names_by_path) with Not_found -> None with
| Some names ->
loop (String_set.union acc names) summary
| None ->
match lookup_env find_module path !Toploop.toplevel_env with
| Some module_type ->
let names = names_of_module_type module_type in
local_names_by_path := Path_map.add path names !local_names_by_path;
loop (String_set.union acc names) summary
| None ->
local_names_by_path := Path_map.add path String_set.empty !local_names_by_path;
loop acc summary
in
(* Add names of the environment: *)
let acc = loop String_set.empty (Env.summary !Toploop.toplevel_env) in
(* Add accessible modules: *)
String_set.union acc (visible_modules ())
let global_names () = get_cached global_names list_global_names
let replace x y set =
if String_set.mem x set then
String_set.add y (String_set.remove x set)
else
set
let list_global_fields () =
let rec loop acc = function
| Env.Env_empty -> acc
| Env.Env_value_unbound _-> acc
| Env.Env_module_unbound _-> acc
| Env.Env_value(summary, id, _) ->
loop (add (Ident.name id) acc) summary
| Env.Env_type(summary, id, decl) ->
loop (add_fields_of_type decl (add (Ident.name id) acc)) summary
| Env.Env_extension(summary, id, _) ->
loop (add (Ident.name id) acc) summary
| Env.Env_module(summary, id, _, _) ->
loop (add (Ident.name id) acc) summary
| Env.Env_functor_arg(summary, id) ->
loop (add (Ident.name id) acc) summary
| Env.Env_modtype(summary, id, _) ->
loop (add (Ident.name id) acc) summary
| Env.Env_class(summary, id, _) ->
loop (add (Ident.name id) acc) summary
| Env.Env_cltype(summary, id, _) ->
loop (add (Ident.name id) acc) summary
| Env.Env_persistent (summary, id) ->
loop (add (Ident.name id) acc) summary
| Env.Env_constraints (summary, _) ->
loop acc summary
| Env.Env_copy_types summary ->
loop acc summary
| Env.Env_open(summary, path) ->
match try Some (Path_map.find path !local_fields_by_path) with Not_found -> None with
| Some fields ->
loop (String_set.union acc fields) summary
| None ->
match lookup_env find_module path !Toploop.toplevel_env with
| Some module_type ->
let fields = fields_of_module_type module_type in
local_fields_by_path := Path_map.add path fields !local_fields_by_path;
loop (String_set.union acc fields) summary
| None ->
local_fields_by_path := Path_map.add path String_set.empty !local_fields_by_path;
loop acc summary
in
(* Add fields of the environment: *)
let acc = loop String_set.empty (Env.summary !Toploop.toplevel_env) in
(* Add accessible modules: *)
String_set.union acc (visible_modules ())
let global_fields () = get_cached global_fields list_global_fields
(* +-----------------------------------------------------------------+
| Listing methods |
+-----------------------------------------------------------------+ *)
let rec find_method meth type_expr =
match get_desc type_expr with
| Tlink type_expr ->
find_method meth type_expr
| Tobject (type_expr, _) ->
find_method meth type_expr
| Tfield (name, _, type_expr, rest) ->
if name = meth then
Some type_expr
else
find_method meth rest
| Tpoly (type_expr, _) ->
find_method meth type_expr
| Tconstr (path, _, _) -> begin
match lookup_env Env.find_type path !Toploop.toplevel_env with
| None
| Some { type_manifest = None } ->
None
| Some { type_manifest = Some type_expr } ->
find_method meth type_expr
end
| _ ->
None
let rec methods_of_type acc type_expr =
match get_desc type_expr with
| Tlink type_expr ->
methods_of_type acc type_expr
| Tobject (type_expr, _) ->
methods_of_type acc type_expr
| Tfield (name, _, _, rest) ->
methods_of_type (add name acc) rest
| Tpoly (type_expr, _) ->
methods_of_type acc type_expr
| Tconstr (path, _, _) -> begin
match lookup_env Env.find_type path !Toploop.toplevel_env with
| None
| Some { type_manifest = None } ->
acc
| Some { type_manifest = Some type_expr } ->
methods_of_type acc type_expr
end
| _ ->
acc
let rec find_object meths type_expr =
match meths with
| [] ->
Some type_expr
| meth :: meths ->
match find_method meth type_expr with
| Some type_expr ->
find_object meths type_expr
| None ->
None
let methods_of_object longident meths =
match lookup_env Env.find_value_by_name longident !Toploop.toplevel_env with
| None ->
[]
| Some (path, { val_type = type_expr }) ->
match find_object meths type_expr with
| None ->
[]
| Some type_expr ->
String_set.elements (methods_of_type String_set.empty type_expr)
(* +-----------------------------------------------------------------+
| Listing labels |
+-----------------------------------------------------------------+ *)
let rec labels_of_type acc type_expr =
match get_desc type_expr with
| Tlink te ->
labels_of_type acc te
| Tpoly (te, _) ->
labels_of_type acc te
| Tarrow(label, _, te, _) ->
(match label with
| Nolabel ->
labels_of_type acc te
| Optional label ->
labels_of_type (String_map.add label Optional acc) te
| Labelled label ->
labels_of_type (String_map.add label Required acc) te)
| Tconstr(path, _, _) -> begin
match lookup_env Env.find_type path !Toploop.toplevel_env with
| None
| Some { type_manifest = None } ->
String_map.bindings acc
| Some { type_manifest = Some type_expr } ->
labels_of_type acc type_expr
end
| _ ->
String_map.bindings acc
let labels_of_function longident meths =
match lookup_env Env.find_value_by_name longident !Toploop.toplevel_env with
| None ->
[]
| Some (path, { val_type = type_expr }) ->
match find_object meths type_expr with
| None ->
[]
| Some type_expr ->
labels_of_type String_map.empty type_expr
let labels_of_newclass longident =
match lookup_env Env.find_class_by_name longident !Toploop.toplevel_env with
| None ->
[]
| Some (path, { cty_new = None }) ->
[]
| Some (path, { cty_new = Some type_expr }) ->
labels_of_type String_map.empty type_expr
(* +-----------------------------------------------------------------+
| Tokens processing |
+-----------------------------------------------------------------+ *)
(* Filter blanks and comments except for the last token. *)
let filter tokens =
let rec aux acc = function
| [] -> acc
| [((Blanks | Comment (_, true)), loc)] -> (Blanks, loc) :: acc
| ((Blanks | Comment (_, true)), _) :: rest -> aux acc rest
| x :: rest -> aux (x :: acc) rest
in
List.rev (aux [] tokens)
(* Reverse and filter blanks and comments except for the last
token. *)
let rec rev_filter acc tokens =
match tokens with
| [] -> acc
| [((Blanks | Comment (_, true)), loc)] -> (Blanks, loc) :: acc
| ((Blanks | Comment (_, true)), _) :: rest -> rev_filter acc rest
| x :: rest -> rev_filter (x :: acc) rest
(* Find the current context. *)
let rec find_context tokens = function
| [] ->
Some (rev_filter [] tokens)
| [(Quotation (items, false), _)] ->
find_context_in_quotation items
| _ :: rest ->
find_context tokens rest
and find_context_in_quotation = function
| [] ->
None
| [(Quot_anti { a_closing = None; a_contents = tokens }, _)] ->
find_context tokens tokens
| _ :: rest ->
find_context_in_quotation rest
(* +-----------------------------------------------------------------+
| Completion |
+-----------------------------------------------------------------+ *)
let complete ~phrase_terminator ~input =
let true_name, false_name = ("true", "false") in
let tokens = UTop_lexer.lex_string input in
(* Filter blanks and comments. *)
let tokens = filter tokens in
match tokens with
(* Completion on directive names. *)
| [(Symbol "#", { idx2 = stop })]
| [(Symbol "#", _); (Blanks, { idx2 = stop })] ->
(stop, list_directives phrase_terminator)
| [(Symbol "#", _); ((Lident src | Uident src), { idx1 = start })] ->
(start, lookup_assoc src (list_directives phrase_terminator))
(* Complete with ";;" when possible. *)
| [(Symbol "#", _); ((Lident _ | Uident _), _); (String (_, true), { idx2 = stop })]
| [(Symbol "#", _); ((Lident _ | Uident _), _); (String (_, true), _); (Blanks, { idx2 = stop })] ->
(stop, [(phrase_terminator, "")])
| [(Symbol "#", _); ((Lident _ | Uident _), _); (String (_, true), _); (Symbol sym, { idx1 = start })] ->
if Zed_utf8.starts_with phrase_terminator sym then
(start, [(phrase_terminator, "")])
else
(0, [])
(* Completion on #require. *)
| [(Symbol "#", _); (Lident "require", _); (String (tlen, false), loc)] ->
let pkg = String.sub input (loc.ofs1 + tlen) (String.length input - loc.ofs1 - tlen) in
let pkgs = lookup pkg (Fl_package_base.list_packages ()) in
(loc.idx1 + 1, List.map (fun pkg -> (pkg, "\"" ^ phrase_terminator)) (List.sort compare pkgs))
| [(Symbol "#", _); (Lident "typeof", _); (String (tlen, false), loc)] ->
let prefix = String.sub input (loc.ofs1 + tlen) (String.length input - loc.ofs1 - tlen) in
begin match Parse.longident (Lexing.from_string prefix) with
| Longident.Ldot (lident, last_prefix) ->
let set = names_of_module lident in
let compls = lookup last_prefix (String_set.elements set) in
let start = loc.idx1 + 1 + (String.length prefix - String.length last_prefix) in
(start, List.map (fun w -> (w, "")) compls)
| _ ->
let set = global_names () in
let compls = lookup prefix (String_set.elements set) in
(loc.idx1 + 1, List.map (fun w -> (w, "")) compls)
end
(* Completion on #load. *)
| [(Symbol "#", _); (Lident ("load" | "load_rec"), _); (String (tlen, false), loc)] ->
let file = String.sub input (loc.ofs1 + tlen) (String.length input - loc.ofs1 - tlen) in
let filter name = Filename.check_suffix name ".cma" || Filename.check_suffix name ".cmo" in
let map =
if Filename.is_relative file then
let dir = Filename.dirname file in
List.fold_left
(fun acc d -> add_files filter acc (Filename.concat d dir))
String_map.empty
(Filename.current_dir_name ::
(UTop_compat.get_load_path ())
)
else
add_files filter String_map.empty (Filename.dirname file)
in
let list = String_map.bindings map in
let name = basename file in
let result = lookup_assoc name list in
(loc.idx2 - Zed_utf8.length name,
List.map (function (w, Directory) -> (w, "") | (w, File) -> (w, "\"" ^ phrase_terminator)) result)
(* Completion on #ppx. *)
| [(Symbol "#", _); (Lident ("ppx"), _); (String (tlen, false), loc)] ->
let file = String.sub input (loc.ofs1 + tlen) (String.length input - loc.ofs1 - tlen) in
let filter ~dir_ok name =
try
Unix.access name [Unix.X_OK];
let kind = (Unix.stat name).Unix.st_kind in
let basename = Filename.basename name in
(kind = Unix.S_REG && String.length basename >= 4 &&
String.sub basename 0 4 = "ppx_") ||
(dir_ok && kind = Unix.S_DIR)
with Unix.Unix_error _ -> false
in
let map =
if Filename.dirname file = "." && not (Filename.is_implicit file) then
let dir = Filename.dirname file in
add_files (filter ~dir_ok:true) String_map.empty dir
else
List.fold_left
(fun acc dir -> add_files (fun name ->
filter ~dir_ok:false (Filename.concat dir name)) acc dir)
String_map.empty (path ())
in
let list = String_map.bindings map in
let name = basename file in
let result = lookup_assoc name list in
(loc.idx2 - Zed_utf8.length name,
List.map (function (w, Directory) -> (w, "") | (w, File) -> (w, "\"" ^ phrase_terminator)) result)
(* Completion on #use and #mod_use *)
| [(Symbol "#", _); (Lident "use", _); (String (tlen, false), loc)]
| [(Symbol "#", _); (Lident "mod_use", _); (String (tlen, false), loc)] ->
let file = String.sub input (loc.ofs1 + tlen) (String.length input - loc.ofs1 - tlen) in
let filter name =
match try Some (String.rindex name '.') with Not_found -> None with
| None ->
true
| Some idx ->
let ext = String.sub name (idx + 1) (String.length name - (idx + 1)) in
ext = "ml"
in
let map =
if Filename.is_relative file then
let dir = Filename.dirname file in
List.fold_left
(fun acc d -> add_files filter acc (Filename.concat d dir))
String_map.empty
(Filename.current_dir_name ::
(UTop_compat.get_load_path ())
)
else
add_files filter String_map.empty (Filename.dirname file)
in
let list = String_map.bindings map in
let name = basename file in
let result = lookup_assoc name list in
(loc.idx2 - Zed_utf8.length name,
List.map (function (w, Directory) -> (w, "") | (w, File) -> (w, "\"" ^ phrase_terminator)) result)
(* Completion on #directory and #cd. *)
| [(Symbol "#", _); (Lident ("cd" | "directory"), _); (String (tlen, false), loc)] ->
let file = String.sub input (loc.ofs1 + tlen) (String.length input - loc.ofs1 - tlen) in
let list = list_directories (Filename.dirname file) in
let name = basename file in
let result = lookup name list in
(loc.idx2 - Zed_utf8.length name, List.map (function dir -> (dir, "")) result)
(* Generic completion on directives. *)
| [(Symbol "#", _); ((Lident dir | Uident dir), _); (Blanks, { idx2 = stop })] ->
(stop,
match toploop_get_directive dir with
| Some (Toploop.Directive_none _) -> [(phrase_terminator, "")]
| Some (Toploop.Directive_string _) -> [(" \"", "")]
| Some (Toploop.Directive_bool _) -> [(true_name, phrase_terminator); (false_name, phrase_terminator)]
| Some (Toploop.Directive_int _) -> []
| Some (Toploop.Directive_ident _) -> List.map (fun w -> (w, "")) (String_set.elements (global_names ()))
| None -> [])
| (Symbol "#", _) :: ((Lident dir | Uident dir), _) :: tokens -> begin
match toploop_get_directive dir with
| Some (Toploop.Directive_none _) ->
(0, [])
| Some (Toploop.Directive_string _) ->
(0, [])
| Some (Toploop.Directive_bool _) -> begin
match tokens with
| [(Lident id, { idx1 = start })] ->
(start, lookup_assoc id [(true_name, phrase_terminator); (false_name, phrase_terminator)])
| _ ->
(0, [])
end
| Some (Toploop.Directive_int _) ->
(0, [])
| Some (Toploop.Directive_ident _) -> begin
match parse_longident (List.rev tokens) with
| Some (Value, None, start, id) ->
(start, List.map (fun w -> (w, "")) (lookup id (String_set.elements (global_names ()))))
| Some (Value, Some longident, start, id) ->
(start, List.map (fun w -> (w, "")) (lookup id (String_set.elements (names_of_module longident))))
| _ ->
(0, [])
end
| None ->
(0, [])
end
(* Completion on identifiers. *)
| _ ->
match find_context tokens tokens with
| None ->
(0, [])
| Some [] ->
(0, List.map (fun w -> (w, "")) (String_set.elements (String_set.union !UTop.keywords (global_names ()))))
| Some tokens ->
match parse_method tokens with
| Some (longident, meths, start, meth) ->
(start, List.map (fun w -> (w, "")) (lookup meth (methods_of_object longident meths)))
| None ->
match parse_label tokens with
| Some (Fun, longident, meths, Optional, start, label) ->
(start, List.map (fun (w, kind) -> (w, ":")) (lookup_assoc label (List.filter (function (w, Optional) -> true | (w, Required) -> false) (labels_of_function longident meths))))
| Some (Fun, longident, meths, Required, start, label) ->
(start, List.map (fun (w, kind) -> (w, ":")) (lookup_assoc label (labels_of_function longident meths)))
| Some (New, longident, meths, Optional, start, label) ->
(start, List.map (fun (w, kind) -> (w, ":")) (lookup_assoc label (List.filter (function (w, Optional) -> true | (w, Required) -> false) (labels_of_newclass longident))))
| Some (New, longident, meths, Required, start, label) ->
(start, List.map (fun (w, kind) -> (w, ":")) (lookup_assoc label (labels_of_newclass longident)))
| None ->
match parse_longident tokens with
| None ->
(0, [])
| Some (Value, None, start, id) ->
(start, List.map (fun w -> (w, "")) (lookup id (String_set.elements (String_set.union !UTop.keywords (global_names ())))))
| Some (Value, Some longident, start, id) ->
(start, List.map (fun w -> (w, "")) (lookup id (String_set.elements (names_of_module longident))))
| Some (Field, None, start, id) ->
(start, List.map (fun w -> (w, "")) (lookup id (String_set.elements (global_fields ()))))
| Some (Field, Some longident, start, id) ->
(start, List.map (fun w -> (w, "")) (lookup id (String_set.elements (fields_of_module longident))))