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update examples/id_sexp so it can read on stdin

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This commit is contained in:
Simon Cruanes 2016-01-18 12:07:04 +01:00
parent cf931aabb1
commit b000355a74
1 changed files with 11 additions and 6 deletions
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17
examples/id_sexp.ml
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@ -1,13 +1,18 @@
let () =
if Array.length Sys.argv <> 2 then failwith "usage: id_sexp file";
let f = Sys.argv.(1) in
let s = CCSexpM.parse_file_list f in
match s with
let pp_sexp s = match s with
| `Ok l ->
List.iter
(fun s -> Format.printf "@[%a@]@." CCSexpM.print s)
l
| `Error msg ->
Format.printf "error: %s@." msg
let () =
match Sys.argv with
| [| _ |] ->
let s = CCSexpM.parse_chan_list stdin in
pp_sexp s
| [| _; file |] ->
let s = CCSexpM.parse_file_list file in
pp_sexp s
| _ -> failwith "usage: id_sexp [file]"