[Caml-list] labels in records?

[Caml-list] labels in records?

[Chris GauthierDickey]

Is it possible to use a labelled function as a member of a record?

In other words:

let f ~x = x + 1

type { g: ~x:int -> int }
               ^
         syntax error

I get a syntax error when trying to specify the type for the record. I'd 
like the above to work so I can do this:

let r = { g = f }

Thanks,
Chris G.

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Re: [Caml-list] labels in records?

[Brian Hurt]

On Fri, 7 Nov 2003, Chris GauthierDickey wrote:

> Is it possible to use a labelled function as a member of a record?
> 
> In other words:
> 
> let f ~x = x + 1
> 
> type { g: ~x:int -> int }
>                ^
>          syntax error

No tilde.  Try:
type t = { g: x:int -> int }

One nice thing about ocaml, is that the top level prints out 
syntax-correct types.  So, you see: 

# let f ~x = x + 3 ;;
val f : x:int -> int = <fun>
#

Note that lack of a tilde on the type definition.  I just mention this 
because it's how *I* remember when a tilde is needed and when it isn't 
:-).

Brian


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