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|
(***********************************************************************)
(* *)
(* OCaml *)
(* *)
(* Xavier Leroy, projet Cristal, INRIA Rocquencourt *)
(* *)
(* Copyright 1997 Institut National de Recherche en Informatique et *)
(* en Automatique. All rights reserved. This file is distributed *)
(* under the terms of the Q Public License version 1.0. *)
(* *)
(***********************************************************************)
(* Auxiliary type for reporting syntax errors *)
type error =
Unclosed of Location.t * string * Location.t * string
| Expecting of Location.t * string
| Not_expecting of Location.t * string
| Applicative_path of Location.t
| Variable_in_scope of Location.t * string
| Other of Location.t
| Ill_formed_ast of Location.t * string
exception Error of error
exception Escape_error
let prepare_error = function
| Unclosed(opening_loc, opening, closing_loc, closing) ->
Location.errorf ~loc:closing_loc
~sub:[
Location.error ~loc:opening_loc
(Printf.sprintf "Error: This '%s' might be unmatched" opening)
]
~if_highlight:
(Printf.sprintf "Syntax error: '%s' expected, \
the highlighted '%s' might be unmatched"
closing opening)
"Error: Syntax error: '%s' expected" closing
| Expecting (loc, nonterm) ->
Location.errorf ~loc "Error: Syntax error: %s expected." nonterm
| Not_expecting (loc, nonterm) ->
Location.errorf ~loc "Error: Syntax error: %s not expected." nonterm
| Applicative_path loc ->
Location.errorf ~loc
"Error: Syntax error: applicative paths of the form F(X).t \
are not supported when the option -no-app-func is set."
| Variable_in_scope (loc, var) ->
Location.errorf ~loc
"Error: In this scoped type, variable '%s \
is reserved for the local type %s."
var var
| Other loc ->
Location.error ~loc "Error: Syntax error"
| Ill_formed_ast (loc, s) ->
Location.errorf ~loc "Error: broken invariant in parsetree: %s" s
let () =
Location.register_error_of_exn
(function
| Error err -> Some (prepare_error err)
| _ -> None
)
let report_error ppf err =
Location.report_error ppf (prepare_error err)
let location_of_error = function
| Unclosed(l,_,_,_)
| Applicative_path l
| Variable_in_scope(l,_)
| Other l
| Not_expecting (l, _)
| Ill_formed_ast (l, _)
| Expecting (l, _) -> l
let ill_formed_ast loc s =
raise (Error (Ill_formed_ast (loc, s)))
|
