There are indeed two raw_pf in this case.

Try this:

val (recv_buf_pf, raw_pf1 | _) = tmp
prval () = raw_pf := raw_pf1

On Fri, Jul 10, 2020 at 2:16 AM Dambaev Alexander <ice.redm...@gmail.com>
wrote:

> Hi,
>
> Thanks for your answers.
>
> For now, I had tried this:
>
> vtypedef VT = [l1:agz]
>                        ( array_v(char?, l, recv_sz)
>                        , (ptr l, size_t recv_sz) @ l1
>                        | ptr l1
>                        )
> (* ... *)
> var raw with raw_pf = (recv_buf, recv_sz)
> var tmp = (recv_buf_pf, raw_pf | addr@ raw)
> val _ = array_foreach_funenv( ..., tmp)
> val (recv_buf_pf, raw_pf | _) = tmp
>
> But I am getting compile error:
> error(3): the linear dynamic variable [raw_pf$4825(-1)] needs to be
> preserved but it is consumed instead.
> error(3): the linear dynamic variable [raw_pf$4828(-1)] needs to be
> consumed but it is preserved with the type [S2Eat(S2Etyrec(flt0; npf=-1;
> 0=S2Eapp(S2Ecst(ptr); S2Evar(l(8545))), 1=S2Eapp(S2Ecst(size_t);
> S2Evar(recv_sz(8544)))), S2Evar(l1$8709(14460)))] instead.
>
> so it looks like compiler thinks, that there are 2 different raw_pf
> proofs. Is it expected or had I found some bug?
>
> Now I will try with datavtypes
>
> пт, 10 июл. 2020 г. в 05:48, <artyom.shalkha...@gmail.com>:
>
>> Hi Alexander,
>>
>> I guess you could also pass a reference to a stack allocated variable,
>> but that would probably be very difficult to use due to proofs,
>> initialization and the fact you’d be using a tuple.
>>
>> Much easier to use what you’ve already found or what Hongwei describes.
>>
>> Sent from my iPhone
>>
>> On 10 Jul 2020, at 04:12, Dambaev Alexander <ice.redm...@gmail.com>
>> wrote:
>>
>> 
>> For now, I have found the only way to achieve my goal is by using boxed
>> tuples/boxed records:
>>
>> vtypedef VT = (array_v(char?,l,recv_sz) | '( ptr l, size_t recv_sz))
>> (*...*)
>> var tmp = (recv_buf_pf | '( recv_buf, recv_sz))
>>
>> I don't know if this a best way though, as I suppose, that boxed tuple is
>> heap-allocated and I don't know how to cleanup such tuple without GC
>>
>> чт, 9 июл. 2020 г. в 23:54, Dambaev Alexander <ice.redm...@gmail.com>:
>>
>>> And again, I had mistyped one thing in initial email:
>>>
>>> (* ... *)
>>> var tmp = (recv_buf_pf | recv_buf) (* var instead of val in both similar
>>> lines *)
>>> (* ... *)
>>>
>>>
>>> чт, 9 июл. 2020 г. в 23:47, ice.r...@gmail.com <ice.redm...@gmail.com>:
>>>
>>>> Hi,
>>>>
>>>> I am trying to understand how to use array_foreach_env function to pass
>>>> to fwork environment of more than 1 variables (of viewt@ype).
>>>> For example, I can successfully use following:
>>>>
>>>> vtypedef VT = (array_v(char?, l, recv_sz | ptr l)
>>>> fn walker
>>>>     ( array_v(pollfd_t, fdsl, nfds)
>>>>     , x : &pollfd_t >> _
>>>>     , env: !VT
>>>>     ): void =
>>>>     (* body goes here *)
>>>>
>>>> val tmp = (recv_buf_pf | recv_buf)
>>>> val () = array_foreach_funenv
>>>>                <pollfd_t>
>>>>                {array_v(pollfd_t, fdsl,nfds)}
>>>>                {VT}
>>>>                ( fds_pf | fds, nfds, walker, tmp)
>>>> val (recv_buf_pf | _) = tmp
>>>>
>>>> But, as soon as I want to use VT of type
>>>> vtypedef VT = (array_v(char?, l, recv_sz) | ptr l, size_t recv_sz)
>>>> (* ... *)
>>>> val tmp = (recv_buf_pf | recv_buf, recv_sz)
>>>> (* .. *)
>>>> val (recv_buf_pf | _) = tmp
>>>>
>>>> I am getting the following error:
>>>> error(3): mismatch of sorts:
>>>> the needed sort is [S2RTbas(S2RTBASimp(2; viewtype))];
>>>> the actual sort is [S2RTbas(S2RTBASimp(3; viewt0ype))].
>>>>
>>>> How can I fix this error? Thanks in andvance
>>>>
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