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Add File Input Output In OCaml #5975

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Merged
rzuckerm merged 3 commits into from
May 18, 2026
+21 −0
Merged

Add File Input Output In OCaml #5975

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Add File Input Output In OCaml
auberonedu May 17, 2026
f2a65e9
OCaml File IO: moved printing logic out of file-reading try block
auberonedu May 17, 2026
4e837fb
Increased mundanity of sample text in OCaml FileIO
auberonedu May 18, 2026
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21 changes: 21 additions & 0 deletions archive/o/ocaml/file-input-output.ml
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Original file line number Diff line number Diff line change
@@ -0,0 +1,21 @@
let filename = "output.txt"

let sample_text =
{|Some mundane sample text
Some sample text that is mundane
Another line of mundane sample text
|}

let () =
(try
Out_channel.with_open_text filename (fun oc ->
Out_channel.output_string oc sample_text)
Comment on lines +11 to +12
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@rzuckerm rzuckerm May 18, 2026

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This should be written 1 line at a time.

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@alope107 alope107 May 18, 2026

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This is the way that ocamlformat autoformats the file with the default profile. If you put the lambda on a separate line, it reformats the file back to this. I think for a sample program repository it makes sense to follow the convention set out by the language.

with Sys_error msg ->
Printf.eprintf "Failed to write to '%s': %s\n" filename msg;
exit 1);

(try In_channel.with_open_text filename (fun ic -> In_channel.input_lines ic)
with Sys_error msg ->
Printf.eprintf "Failed to read from '%s': %s\n" filename msg;
exit 1)
|> List.iter print_endline
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