Re: [proto] [proto-11] expression extension

2012-06-06 Thread Mathias Gaunard 

On 03/06/2012 09:41, Eric Niebler wrote:


Hey all, this is just an FYI. I've been hard at work at a ground-up
redesign of proto for C++11. I've gotten far enough along that I know
what expression extension will look like, so I thought I'd share. This
should interest those who want finer control over how expressions in
their domain are constructed. Without further ado:

 templatetypename Tag, typename Args
 struct MyExpr;

 struct MyDomain
   : proto::domainMyDomain
 {
 struct make_expr
   : proto::make_custom_exprMyExpr, MyDomain
 {};
 };

 templatetypename Tag, typename Args
 struct MyExpr


Wouldn't it be more interesting for make_custom_expr to take a 
meta-function class?

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Re: [proto] [proto-11] expression extension

2012-06-06 Thread Eric Niebler 
On 6/5/2012 11:10 PM, Mathias Gaunard wrote:
 On 03/06/2012 09:41, Eric Niebler wrote:

 Hey all, this is just an FYI. I've been hard at work at a ground-up
 redesign of proto for C++11. I've gotten far enough along that I know
 what expression extension will look like, so I thought I'd share. This
 should interest those who want finer control over how expressions in
 their domain are constructed. Without further ado:

  templatetypename Tag, typename Args
  struct MyExpr;

  struct MyDomain
: proto::domainMyDomain
  {
  struct make_expr
: proto::make_custom_exprMyExpr, MyDomain
  {};
  };

  templatetypename Tag, typename Args
  struct MyExpr
 
 Wouldn't it be more interesting for make_custom_expr to take a
 meta-function class?

The template template parameter is distasteful, I agree, but I can shave
template instantiations this way. There's no need to instantiate a
nested apply template for every new expression type created. Especially
now with template aliases, it's quite painless to adapt a template to
have the interface that make_custom_expr expects. That was my reasoning,
at least.

-- 
Eric Niebler
BoostPro Computing
http://www.boostpro.com
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Re: [proto] [proto-11] expression extension

2012-06-06 Thread Mathias Gaunard 

On 06/06/2012 08:24, Eric Niebler wrote:


The template template parameter is distasteful, I agree, but I can shave
template instantiations this way. There's no need to instantiate a
nested apply template for every new expression type created. Especially
now with template aliases, it's quite painless to adapt a template to
have the interface that make_custom_expr expects. That was my reasoning,
at least.


I hadn't considered template aliases, I guess with those it is just fine.
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[proto] Who's using proto ?

2012-06-06 Thread Joel Falcou 

Hi,

i'm in the process of writing a journal paper about proto and I wanted 
to give

a realistic snapshot of who is using proto and for what. I know some already
(the whole MSM  Spirit team etc ) but i am sure there is other people 
lurking

around here.

So, if you want to contribute, I wish any of you, proto user, to tell me 
who you are,
what you're using proto for and if you have a reference (for academic) 
or a website
(for other). It's a win-win as you may get exposure and you help us make 
this paper

a nice PR for proto.

Of course, you can do this on the list or in private if you prefer.

Thanks in advance.
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