From: briand@aracnet.com
To: caml-list@inria.fr
Subject: [Caml-list] duplicate record labels and modules
Date: Mon, 10 May 2004 22:13:14 -0700 [thread overview]
Message-ID: <16544.24810.112188.634596@soggy.deldotd.com> (raw)
Consider the following :
let a = {Foo.n1=1; Foo.n2=2; Foo.a=(- 1.0)} in
let b = {Bar.n1=4; Bar.n2=(- 5); Bar.b=77.} in
Printf.printf "%d\n" a.Foo.n1;
Printf.printf "%d\n" b.Bar.n1;
That's too verbose, and I can't use open or I get the dreaded mixing
labels problem. So how about:
let (a:Foo.t) = {n1=1; n2=2; a=(- 1.0)} in
Unbound record field label n1
After careful review of the grammar I discovered that is incorrect,
although it seems like it should work.
A little more perusing and I found:
let-binding ::= pattern = expr
| value-name { parameter } [: typexpr] = expr
and that makes sense. I'm simply explictly annotating the type of a,
right ?
So I tried:
let a:Foo.t = {n1=1; n2=2; a=(- 1.0)} in
And got the same error, i.e. unbound field n1....
I'm doing a lot of work so I can be lazy :-)
Thanks
Brian
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next reply other threads:[~2004-05-11 5:13 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-11 5:13 briand [this message]
2004-05-11 7:32 ` Ville-Pertti Keinonen
2004-05-11 16:10 ` briand
2004-05-11 17:46 ` brogoff
2004-05-11 18:15 ` briand
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