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ast_convenience_410.ml
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ast_convenience_410.ml
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open Migrate_parsetree.Ast_410
(* This file is part of the ppx_tools package. It is released *)
(* under the terms of the MIT license (see LICENSE file). *)
(* Copyright 2013 Alain Frisch and LexiFi *)
open Parsetree
open Asttypes
open Location
open Ast_helper
module Label = struct
type t = Asttypes.arg_label
type desc = Asttypes.arg_label =
Nolabel
| Labelled of string
| Optional of string
let explode x = x
let nolabel = Nolabel
let labelled x = Labelled x
let optional x = Optional x
end
module Constant = struct
type t = Parsetree.constant =
Pconst_integer of string * char option
| Pconst_char of char
| Pconst_string of string * string option
| Pconst_float of string * char option
let of_constant x = x
let to_constant x = x
end
let may_tuple ?loc tup = function
| [] -> None
| [x] -> Some x
| l -> Some (tup ?loc ?attrs:None l)
let lid ?(loc = !default_loc) s = mkloc (Longident.parse s) loc
let constr ?loc ?attrs s args = Exp.construct ?loc ?attrs (lid ?loc s) (may_tuple ?loc Exp.tuple args)
let nil ?loc ?attrs () = constr ?loc ?attrs "[]" []
let unit ?loc ?attrs () = constr ?loc ?attrs "()" []
let tuple ?loc ?attrs = function
| [] -> unit ?loc ?attrs ()
| [x] -> x
| xs -> Exp.tuple ?loc ?attrs xs
let cons ?loc ?attrs hd tl = constr ?loc ?attrs "::" [hd; tl]
let list ?loc ?attrs l = List.fold_right (cons ?loc ?attrs) l (nil ?loc ?attrs ())
let str ?loc ?attrs s = Exp.constant ?loc ?attrs (Pconst_string (s, None))
let int ?loc ?attrs x = Exp.constant ?loc ?attrs (Pconst_integer (string_of_int x, None))
let int32 ?loc ?attrs x = Exp.constant ?loc ?attrs (Pconst_integer (Int32.to_string x, Some 'l'))
let int64 ?loc ?attrs x = Exp.constant ?loc ?attrs (Pconst_integer (Int64.to_string x, Some 'L'))
let char ?loc ?attrs x = Exp.constant ?loc ?attrs (Pconst_char x)
let float ?loc ?attrs x = Exp.constant ?loc ?attrs (Pconst_float (string_of_float x, None))
let record ?loc ?attrs ?over l =
Exp.record ?loc ?attrs (List.map (fun (s, e) -> (lid ~loc:e.pexp_loc s, e)) l) over
let func ?loc ?attrs l = Exp.function_ ?loc ?attrs (List.map (fun (p, e) -> Exp.case p e) l)
let lam ?loc ?attrs ?(label = Label.nolabel) ?default pat exp = Exp.fun_ ?loc ?attrs label default pat exp
let app ?loc ?attrs f l = if l = [] then f else Exp.apply ?loc ?attrs f (List.map (fun a -> Label.nolabel, a) l)
let evar ?loc ?attrs s = Exp.ident ?loc ?attrs (lid ?loc s)
let let_in ?loc ?attrs ?(recursive = false) b body =
Exp.let_ ?loc ?attrs (if recursive then Recursive else Nonrecursive) b body
let sequence ?loc ?attrs = function
| [] -> unit ?loc ?attrs ()
| hd :: tl -> List.fold_left (fun e1 e2 -> Exp.sequence ?loc ?attrs e1 e2) hd tl
let pvar ?(loc = !default_loc) ?attrs s = Pat.var ~loc ?attrs (mkloc s loc)
let pconstr ?loc ?attrs s args = Pat.construct ?loc ?attrs (lid ?loc s) (may_tuple ?loc Pat.tuple args)
let precord ?loc ?attrs ?(closed = Open) l =
Pat.record ?loc ?attrs (List.map (fun (s, e) -> (lid ~loc:e.ppat_loc s, e)) l) closed
let pnil ?loc ?attrs () = pconstr ?loc ?attrs "[]" []
let pcons ?loc ?attrs hd tl = pconstr ?loc ?attrs "::" [hd; tl]
let punit ?loc ?attrs () = pconstr ?loc ?attrs "()" []
let ptuple ?loc ?attrs = function
| [] -> punit ?loc ?attrs ()
| [x] -> x
| xs -> Pat.tuple ?loc ?attrs xs
let plist ?loc ?attrs l = List.fold_right (pcons ?loc ?attrs) l (pnil ?loc ?attrs ())
let pstr ?loc ?attrs s = Pat.constant ?loc ?attrs (Pconst_string (s, None))
let pint ?loc ?attrs x = Pat.constant ?loc ?attrs (Pconst_integer (string_of_int x, None))
let pchar ?loc ?attrs x = Pat.constant ?loc ?attrs (Pconst_char x)
let pfloat ?loc ?attrs x = Pat.constant ?loc ?attrs (Pconst_float (string_of_float x, None))
let tconstr ?loc ?attrs c l = Typ.constr ?loc ?attrs (lid ?loc c) l
let get_str = function
| {pexp_desc=Pexp_constant (Pconst_string (s, _)); _} -> Some s
| _ -> None
let get_str_with_quotation_delimiter = function
| {pexp_desc=Pexp_constant (Pconst_string (s, d)); _} -> Some (s, d)
| _ -> None
let get_lid = function
| {pexp_desc=Pexp_ident{txt=id;_};_} ->
Some (String.concat "." (Longident.flatten id))
| _ -> None
let find_attr s attrs =
try Some ((List.find (fun {attr_name=x;_} -> x.txt = s) attrs).attr_payload)
with Not_found -> None
let expr_of_payload = function
| PStr [{pstr_desc=Pstr_eval(e, _); _}] -> Some e
| _ -> None
let find_attr_expr s attrs =
match find_attr s attrs with
| Some e -> expr_of_payload e
| None -> None
let has_attr s attrs =
find_attr s attrs <> None