Hi Ryan,
I see the "generated" C++ but where is the CnC front-end code?
Regards,
Vasili
On Thu, Sep 2, 2010 at 7:23 PM, Ryan Newton <new...@mit.edu> wrote:
> Belated update:
>
> The haskell-cnc distribution (if you grab it from darcs) now has a
> front-end that parses the graph description files.
> http://hackage.haskell.org/package/haskell-cnc
>
> For any readers who haven't seen this before -- CnC is a parallel
> programming model that includes both a library and a small DSL for graph
> specification. The specification file describes the structure of an
> application and captures various invariants about data access.
>
> The CnC front-end in the haskell-cnc distro is meant to replace existing
> CnC spec "translators" and generate code for all host languages that support
> the programming model (currently C++, Java, .NET, Haskell). Also the graph
> specification language is getting a refresh in the process (new
> features/syntax). The parser is done with Happy. What's there right now
> only generates C++ code, but the Haskell codegen is straightforward and
> should come along shortly (anyone want to help?).
>
> The purpose of such a front-end is to generate code that:
> (1) saves boilerplate in graph construction (more of a problem in
> non-haskell languages)
> (2) correctness: enforces invariants expressed in the specification
> (3) performance: generate code that embodies graph analysis and
> optimizations (based also on profiling data)
>
> Cheers,
> -Ryan
>
>
>
> On Fri, Jun 25, 2010 at 11:02 AM, David Peixotto <d...@rice.edu> wrote:
>
>> There is a reference for the CnC grammar in the repository for the .NET
>> implementation.
>>
>> http://github.com/dmpots/CnC.NET/blob/master/CnC.NET/CnC.NET/cnc.grammar
>>
>> The parser specification for fsyacc (the F# YACC implementation) is here:
>>
>> http://github.com/dmpots/CnC.NET/blob/master/CnC.NET/CnC.NET/Parser.fsy
>>
>> The textual representation is still in flux a bit, but this grammar should
>> be enough of a guide for implementing a parser in Haskell. The grammar is
>> left recursive, so using a parser generator like Happy would be a good
>> choice.
>>
>> The textual representation will actually be a bit different depending on
>> the underlying language since the types of items stored in a collection is
>> part of the description. For example in C, an item collection that stores an
>> array of ints would be declared like:
>>
>> [int* A];
>>
>> but in Haskell we would want to write something like
>>
>> [Array Int Int A];
>>
>> I think dealing with type declarations would in the textual representation
>> would be the main difference in implementing the parser in Haskell. Once the
>> textual representation has been parsed to an AST it should be possible to
>> generate the Haskell code that builds the graph using the haskell-cnc
>> package.
>>
>> -David
>>
>> On Jun 23, 2010, at 3:56 PM, Vasili I. Galchin wrote:
>>
>>
>>
>> On Wed, Jun 23, 2010 at 3:47 PM, Don Stewart <d...@galois.com> wrote:
>>
>>> vigalchin:
>>> > Hello,
>>> >
>>> > I have been reading work done at Rice University: http://
>>> > habanero.rice.edu/cnc. Some work has been done by
>>> http://www.cs.rice.edu/
>>> > ~dmp4866/ on CnC for .Net. One component that David wrote a CnC
>>> translator that
>>> > translates CnC textual form to the underlying language, e.g. F#. Is
>>> anybody
>>> > working on a CnC textual form translator for Haskell so a Haskell user
>>> of CnC
>>> > Haskell can write in a higher level??
>>>
>>> Ah, so by a translator from high level CnC form to this:
>>>
>>>
>>> http://hackage.haskell.org/packages/archive/haskell-cnc/latest/doc/hml/Intel-Cnc.html<http://hackage.haskell.org/packages/archive/haskell-cnc/latest/doc/html/Intel-Cnc.html>
>>>
>>> ^^ exactly what I mean
>>
>>
>>> ? Do you have a reference for the "CnC textual form"?
>>>
>> ^^ if you mean something like a context-free grammatical
>> definition of the "CnC textual form" ,,, the answer is I haven't seen such a
>> reference.
>>
>> V.
>>
>>
>>
>>> -- Don
>>>
>>
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