[Caml-list] camlp4 and assignments

[Caml-list] camlp4 and assignments

[Pietro Abate]

Hi all,
I want to write a quotation to produce and assignment.
So far I was only able to produce a variable assigment,
but, of course, that's not what I want...

my attempt looks like:

<:str_item<$lid:"foo" := $str:"bar"$ >>

and the expected result should be
let _ = foo := "bar"

but I get

let _ = foo <- "bar"
and "Unbound instance variable foo"

what's the right syntax ?

tnx,
p

-- 
Civilization advances by extending the number
of important operations which we can perform 
without thinking. (Alfred North Whitehead)

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Re: [Caml-list] camlp4 and assignments

[Stefano Zacchiroli]

On Mon, Jul 14, 2003 at 02:21:05PM +1000, Pietro Abate wrote:
> <:str_item<$lid:"foo" := $str:"bar"$ >>
> 
> and the expected result should be
> let _ = foo := "bar"
> 
> but I get
> 
> let _ = foo <- "bar"

Inside quotations you have to use revised syntax in which refs are
declared as record types with a "val" field.

Standard syntax:      foo := "bar"
Revised syntax:       foo.val := "bar"

Cheers

-- 
Stefano Zacchiroli  --  Master in Computer Science @ Uni. Bologna, Italy
zack@{cs.unibo.it,debian.org,bononia.it}  -  http://www.bononia.it/zack/
"  I know you believe you understood what you think I said, but I am not
sure you realize that what you heard is not what I meant!  " -- G.Romney

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