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|
(**************************************************************************)
(* *)
(* OCamlFormat *)
(* *)
(* Copyright (c) Facebook, Inc. and its affiliates. *)
(* *)
(* This source code is licensed under the MIT license found in *)
(* the LICENSE file in the root directory of this source tree. *)
(* *)
(**************************************************************************)
open Ocamlformat_parser_extended
include Parsetree
let equal_core_type : core_type -> core_type -> bool = Poly.equal
type use_file = toplevel_phrase list
type repl_file = repl_phrase list
type 'a t =
| Structure : structure t
| Signature : signature t
| Use_file : use_file t
| Core_type : core_type t
| Module_type : module_type t
| Expression : expression t
| Repl_file : repl_file t
| Documentation : Ocamlformat_odoc_parser.Ast.t t
type any_t = Any : 'a t -> any_t [@@unboxed]
let of_syntax = function
| Syntax.Structure -> Any Structure
| Signature -> Any Signature
| Use_file -> Any Use_file
| Core_type -> Any Core_type
| Module_type -> Any Module_type
| Expression -> Any Expression
| Repl_file -> Any Repl_file
| Documentation -> Any Documentation
let equal (type a) (_ : a t) : a -> a -> bool = Poly.equal
let map (type a) (x : a t) (m : Ast_mapper.mapper) : a -> a =
match x with
| Structure -> m.structure m
| Signature -> m.signature m
| Use_file -> List.map ~f:(m.toplevel_phrase m)
| Core_type -> m.typ m
| Module_type -> m.module_type m
| Expression -> m.expr m
| Repl_file -> List.map ~f:(m.repl_phrase m)
| Documentation -> Fn.id
module Parse = struct
let normalize_mapper ~ocaml_version ~preserve_beginend =
let open Asttypes in
let open Ast_mapper in
let enable_short_field_annot =
Ocaml_version.compare ocaml_version Ocaml_version.Releases.v4_03_0 >= 0
in
let record_field m (f, t, v) =
match (t, v) with
(* [{ x = x }] -> [{ x }] *)
| ( _
, Some {pexp_desc= Pexp_ident {txt= v_txt; _}; pexp_attributes= []; _}
)
when Std_longident.field_alias ~field:f.txt v_txt ->
(f, t, None)
(* [{ x = (x : t) }] -> [{ x : t }] *)
| ( None
, Some
{ pexp_desc=
Pexp_constraint
( { pexp_desc= Pexp_ident {txt= v_txt; _}
; pexp_attributes= []
; _ }
, t1 )
; pexp_attributes= []
; _ } )
when enable_short_field_annot
&& Std_longident.field_alias ~field:f.txt v_txt ->
(f, Some (Pconstraint t1), None)
(* [{ x :> t = (x : t) }] -> [{ x : t :> t }] *)
| ( Some (Pcoerce (None, t2))
, Some
{ pexp_desc=
Pexp_constraint
( { pexp_desc= Pexp_ident {txt= v_txt; _}
; pexp_attributes= []
; _ }
, t1 )
; pexp_attributes= []
; _ } )
when enable_short_field_annot
&& Std_longident.field_alias ~field:f.txt v_txt ->
(f, Some (Pcoerce (Some t1, t2)), None)
(* [{ x = (x :> t) }] -> [{ x :> t }] *)
(* [{ x = (x : t :> t) }] -> [{ x : t :> t }] *)
| ( None
, Some
{ pexp_desc=
Pexp_coerce
( { pexp_desc= Pexp_ident {txt= v_txt; _}
; pexp_attributes= []
; _ }
, t1
, t2 )
; pexp_attributes= []
; _ } )
when enable_short_field_annot
&& Std_longident.field_alias ~field:f.txt v_txt ->
(f, Some (Pcoerce (t1, t2)), None)
(* [{ x : t = (x :> t) }] -> [{ x : t :> t }] *)
| ( Some (Pconstraint t1)
, Some
{ pexp_desc=
Pexp_coerce
( { pexp_desc= Pexp_ident {txt= v_txt; _}
; pexp_attributes= []
; _ }
, None
, t2 )
; pexp_attributes= []
; _ } )
when enable_short_field_annot
&& Std_longident.field_alias ~field:f.txt v_txt ->
(f, Some (Pcoerce (Some t1, t2)), None)
| _ -> (f, t, Option.map ~f:(m.expr m) v)
in
let pat_record_field m (f, t, v) =
match (t, v) with
(* [{ x = x }] -> [{ x }] *)
| _, Some {ppat_desc= Ppat_var {txt= v_txt; _}; ppat_attributes= []; _}
when Std_longident.field_alias ~field:f.txt (Lident v_txt) ->
(f, t, None)
(* [{ x = (x : t) }] -> [{ x : t}] *)
| ( None
, Some
{ ppat_desc=
Ppat_constraint
( { ppat_desc= Ppat_var {txt= v_txt; _}
; ppat_attributes= []
; _ }
, t )
; ppat_attributes= []
; _ } )
when enable_short_field_annot
&& Std_longident.field_alias ~field:f.txt (Lident v_txt) ->
(f, Some t, None)
| _ -> (f, t, Option.map ~f:(m.pat m) v)
in
let binding_op (m : Ast_mapper.mapper) b =
let b' =
let loc_start = b.pbop_op.loc.loc_start in
let loc_end = b.pbop_exp.pexp_loc.loc_end in
{b with pbop_loc= {b.pbop_loc with loc_start; loc_end}}
in
Ast_mapper.default_mapper.binding_op m b'
in
let pat m = function
| {ppat_desc= Ppat_cons (_ :: _ :: _ :: _ as l); _} as p
when match List.last_exn l with
(* Empty lists are always represented as Lident [] *)
| { ppat_desc= Ppat_construct ({txt= Lident "[]"; loc= _}, None)
; ppat_attributes= []
; _ } ->
true
| _ -> false ->
let pats = List.(rev (tl_exn (rev l))) in
{p with ppat_desc= Ppat_list pats}
(* Field alias shorthand *)
| {ppat_desc= Ppat_record (fields, flag); _} as e ->
let fields = List.map ~f:(pat_record_field m) fields in
{e with ppat_desc= Ppat_record (fields, flag)}
(* [(module M) : (module T)] -> [(module M : T)] *)
| { ppat_desc=
Ppat_constraint
( {ppat_desc= Ppat_unpack (name, None); ppat_attributes= []; _}
, {ptyp_desc= Ptyp_package pt; ptyp_attributes= []; _} )
; _ } as p ->
{p with ppat_desc= Ppat_unpack (name, Some pt)}
| p -> Ast_mapper.default_mapper.pat m p
in
let expr (m : Ast_mapper.mapper) = function
| {pexp_desc= Pexp_cons (_ :: _ :: _ :: _ as l); _} as e
when match List.last_exn l with
(* Empty lists are always represented as Lident [] *)
| { pexp_desc= Pexp_construct ({txt= Lident "[]"; loc= _}, None)
; pexp_attributes= []
; _ } ->
true
| _ -> false ->
let exprs = List.(rev (tl_exn (rev l))) in
{e with pexp_desc= Pexp_list exprs}
(* Removing beginend *)
| {pexp_desc= Pexp_beginend e'; pexp_attributes= []; _}
when not preserve_beginend ->
m.expr m e'
(* Field alias shorthand *)
| {pexp_desc= Pexp_record (fields, with_); _} as e ->
let fields = List.map ~f:(record_field m) fields in
{ e with
pexp_desc= Pexp_record (fields, Option.map ~f:(m.expr m) with_)
}
(* [( + ) 1 2] -> [1 + 2] *)
| { pexp_desc=
Pexp_apply
( { pexp_desc=
Pexp_ident {txt= Lident op as longident; loc= loc_op}
; pexp_attributes= []
; _ }
, [(Nolabel, l); (Nolabel, r)] )
; _ } as e
when Std_longident.is_infix longident
&& not (Std_longident.is_monadic_binding longident) ->
let label_loc = {txt= op; loc= loc_op} in
{e with pexp_desc= Pexp_infix (label_loc, m.expr m l, m.expr m r)}
(* [(module M) : (module T)] -> [(module M : T)] *)
| { pexp_desc=
Pexp_constraint
( { pexp_desc= Pexp_pack (name, None)
; pexp_attributes= []
; pexp_loc
; _ }
, {ptyp_desc= Ptyp_package pt; ptyp_attributes= []; ptyp_loc; _}
)
; _ } as p
when Migrate_ast.Location.compare_start ptyp_loc pexp_loc > 0 ->
(* Match locations to differentiate between the two position for
the constraint, we want to shorten the second: - [let _ :
(module S) = (module M)] - [let _ = ((module M) : (module
S))] *)
{p with pexp_desc= Pexp_pack (name, Some pt)}
| e -> Ast_mapper.default_mapper.expr m e
in
Ast_mapper.{default_mapper with expr; pat; binding_op}
let ast (type a) (fg : a t) ~ocaml_version ~preserve_beginend ~input_name
str : a =
map fg (normalize_mapper ~ocaml_version ~preserve_beginend)
@@
let lexbuf = Lexing.from_string str in
let ocaml_version =
Some Ocaml_version.(major ocaml_version, minor ocaml_version)
in
Location.init_info lexbuf input_name ;
match fg with
| Structure -> Parse.implementation ~ocaml_version lexbuf
| Signature -> Parse.interface ~ocaml_version lexbuf
| Use_file -> Parse.use_file ~ocaml_version lexbuf
| Core_type -> Parse.core_type ~ocaml_version lexbuf
| Module_type -> Parse.module_type ~ocaml_version lexbuf
| Expression -> Parse.expression ~ocaml_version lexbuf
| Repl_file -> Toplevel_lexer.repl_file ~ocaml_version lexbuf
| Documentation ->
let pos = (Location.curr lexbuf).loc_start in
let pos = {pos with pos_fname= input_name} in
Docstring.parse_file pos str
end
module Printast = struct
include Printast
let use_file = Format.pp_print_list top_phrase
let repl_file = Format.pp_print_list repl_phrase
let ast (type a) : a t -> _ -> a -> _ = function
| Structure -> implementation
| Signature -> interface
| Use_file -> use_file
| Core_type -> core_type
| Module_type -> module_type
| Expression -> expression
| Repl_file -> repl_file
| Documentation -> Docstring.dump
end
module Asttypes = struct
include Asttypes
let is_override = function Override -> true | Fresh -> false
let is_recursive = function Recursive -> true | Nonrecursive -> false
end
|
