74 lines
2.3 KiB
OCaml
74 lines
2.3 KiB
OCaml
(***********************************************************************)
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(* *)
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(* Objective Caml *)
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(* *)
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(* Xavier Leroy, projet Cristal, INRIA Rocquencourt *)
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(* *)
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(* Copyright 1996 Institut National de Recherche en Informatique et *)
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(* Automatique. Distributed only by permission. *)
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(* *)
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(***********************************************************************)
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(* $Id$ *)
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open Printf;;
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let locfmt =
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match Sys.os_type with
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| "MacOS" -> ("File \"%s\"; line %d; characters %d to %d ### %s"
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: ('a, 'b, 'c) format)
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| _ -> ("File \"%s\", line %d, characters %d-%d: %s" : ('a, 'b, 'c) format)
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;;
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let field x i =
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let f = Obj.field x i in
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if not (Obj.is_block f) then
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sprintf "%d" (Obj.magic f : int) (* can also be a char *)
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else if Obj.tag f = 252 then
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sprintf "\"%s\"" (String.escaped (Obj.magic f : string))
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else if Obj.tag f = 253 then
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string_of_float (Obj.magic f : float)
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else
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"_"
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;;
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let rec other_fields x i =
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if i >= Obj.size x then ""
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else sprintf ", %s%s" (field x i) (other_fields x (i+1))
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;;
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let fields x =
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match Obj.size x with
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| 0 -> ""
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| 1 -> ""
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| 2 -> sprintf "(%s)" (field x 1)
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| n -> sprintf "(%s%s)" (field x 1) (other_fields x 2)
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;;
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let to_string = function
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| Out_of_memory -> "Out of memory";
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| Stack_overflow -> "Stack overflow";
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| Match_failure(file, first_char, last_char) ->
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sprintf locfmt file 0 first_char last_char "Pattern matching failed";
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| Assert_failure(file, first_char, last_char) ->
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sprintf locfmt file 0 first_char last_char "Assertion failed";
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| x ->
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let x = Obj.repr x in
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let constructor = (Obj.magic(Obj.field (Obj.field x 0) 0) : string) in
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constructor ^ (fields x)
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;;
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let print fct arg =
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try
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fct arg
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with x ->
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eprintf "Uncaught exception: %s\n" (to_string x);
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flush stderr;
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raise x
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let catch fct arg =
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try
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fct arg
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with x ->
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flush stdout;
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eprintf "Uncaught exception: %s\n" (to_string x);
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exit 2
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