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