Proto for Boost mailing list page: Re: [proto] Proto v5

Subject: Re: [proto] Proto v5
From: Agustín K-ballo Bergé (kaballo86_at_[hidden])
Date: 2013-06-14 20:26:40

On 14/06/2013 09:02 p.m., Eric Niebler wrote:
>
> I've made no effort so far to port Proto v5 to any compiler other than clang. I'm sure it would be a big job. I welcome any contributions. Otherwise, it'll get ported eventually, but probably not before I get the API settled.
>
> Eric
>

That was my polite way of asking if the repository is in a compilable 
state. GCC 4.8.1 claims to be C++11 feature complete, so whatever it 
fails has to be a bug (on either GCC or Proto).

I already sent a pull request that fixes a couple of duplicated 
constexpr (probably a bug on Proto). Also found out that GCC allows the 
use of `this` within `decltype` but not within `noexcept` (probably a 
bug on GCC). I will try to figure out what is wrong with the remaining 
errors.

> -----Original Message-----
> From: Agustín K-ballo Bergé <kaballo86_at_[hidden]>
> Sender: "proto" <proto-bounces_at_[hidden]>Date: Fri, 14 Jun 2013 16:19:23
> To: Discussions about Boost.Proto and DSEL design<proto_at_[hidden]>
> Reply-To: "Discussions about Boost.Proto and DSEL design"
> 	<proto_at_[hidden]>
> Subject: [proto] Proto v5
>
> Hi,
>
> I watched the C++Now session about Proto v5, and now I want to play with
> it. I do not have the luxury of a Clang build from trunk, but I do have
> GCC 4.8.1 which should do pretty well.
>
> I cloned the repository at https://github.com/ericniebler/proto-0x/.
> After jumping a few hoops, I am now left with tons of instances of the
> same errors:
>
> - error: no type named 'proto_grammar_type' in ...
>            using type = typename Ret::proto_grammar_type(Args...);
>
> - error: no type named 'proto_action_type' in ...
>            using type = typename Ret::proto_action_type(Args...);
>
> For at least some cases, those are clear errors since the Ret type
> represents an empty structs (e.g. `not_`).
>
> What is going on? What should I be doing to get Proto v5 to compile?
>
> Regards,
>

Regards,
-- 
Agustín K-ballo Bergé.-
http://talesofcpp.fusionfenix.com