Lucas Dixon wrote:
Perhaps this is something to do with my failure to understand unix
pipes, but the following confuses me...
However, the following misbehaves:
echo 'fun loopy () =
let val sopt = TextIO.inputLine(TextIO.stdIn);
in case sopt of SOME s => (print s; loopy ())
| NONE => ()
end;
PolyML.export ("foo", loopy);
OS.Process.exit OS.Process.success;' | poly
Somehow the "OS.Process.exit OS.Process.success;" becomes the first
input whenever I foo...
Lucas,
No, this was a bug. Thanks for letting me know and I've installed a fix
in CVS. What was happening was that buffered but unread input was being
written out by PolyML.export and then supplied as input to foo. When
used interactively each line is processed separately so the buffer was
empty but when read from a file or a pipe the "OS.Process.exit" line was
in the buffer. The fix clears the buffer at start-up.
Regards,
David.
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