Re: [Caml-list] Syntax errors with match and interface files

[Stephane Glondu <Stephane.Glondu@crans.org>]

Hi,

Jonathan Roewen wrote:
> I'm getting a curious syntax error:
>
> [...]
>
> try
> let put c = putch c; Queue.add c buffer in
> match char_code with
> | Key.kEnter -> put '\n'
> | Key.kBksp -> put '\b'
> | ch -> put (Key.to_char ch)
> with Key.Not_printable -> ()

You cannot use defined variables as patterns (this is a common mistake).
Variables appearing in a pattern are always bound to (parts) of the
matched value. Something close to what you want would be :

try
let put c = putch c; Queue.add c buffer in
match char_code with
| ch when ch = Key.kEnter -> put '\n'
| ch when ch = Key.kBksp -> put '\b'
| ch -> put (Key.to_char ch)
with Key.Not_printable -> ()


Stephane Glondu.