[Cuis] OMeta 2

[Frank Shearar]

On 21 May 2015 at 07:19, H. Hirzel <hannes.hirzel at gmail.com> wrote:
> From the description of OMeta
>
> http://www.vpri.org/pdf/tr2008003_experimenting.pdf
>
> By extending Parsing Expression Grammars (PEGs) [For04] with support for pattern
> matching on arbitrary datatypes, left recursion, and parameterized and
> higher-order
> rules, OMeta gives programmers a natural and convenient way to
> implement parsers,
> visitors, and tree transformers, all of which can be extended in
> interesting ways using
> familiar object-oriented mechanisms. This makes OMeta particularly
> well-suited as a
> tool for building language implementations and extensions.

The left recursion extension isn't totally perfect:
http://tratt.net/laurie/research/pubs/papers/tratt__direct_left_recursive_parsing_expression_grammars.pdf

But it's good enough that I never ran into the issues described in that paper.

Don't forget to advertise this coolness on the OMeta list!

frank

> On 5/21/15, H. Hirzel <hannes.hirzel at gmail.com> wrote:
>> Great achievement, Phil!
>>
>> I did a test and the provided examples work fine.
>>
>> For convenience I combine below the installation instructions taken
>> from different mails from yesterday.
>>
>> --Hannes
>>
>>
>>
>> A. Reestablish #compilerClass in Cuis
>>
>> 1) Unzip attached file compilerClass.zip
>> 2) start Cuis 2330
>> 3) Open file list
>> 4) click on 2331
>> 5) click on [install]
>> 6) click on 2332
>> 7) click on [install]
>>
>>
>>
>> B. pull down the OMeta*.st files from https://github.com/pbella/Cuis-Ports
>>
>>
>>
>> C. File in in the  following sequence
>>       - OMeta2-stage1.st
>>       - OMeta2-stage2a.st
>>       - OMeta2-stage2b.st
>>
>> also see notes: https://github.com/pbella/Cuis-Ports#ometa-2
>>
>>
>> D. Check examples in the
>>      OMeta2Examples
>>    class
>>
>>         OMeta2Examples match: 5 with: #fact.
>>       OMeta2Examples matchAll: '1234' with: #number.
>>       OMeta2Examples matchAll: 'abc123' with: #identifier.
>>       OMeta2Examples matchAll: #($a $b $c 1 2 3 #(4 5)) with: #structure.
>>       OMeta2Examples matchAll: 'howdy' with: #greeting.
>>
>>
>>
>>
>> On 5/20/15, Phil (list) <pbpublist at gmail.com> wrote:
>>> ... is alive!  Several caveats so please check out the README for the
>>> latest updates as things progress:
>>> https://github.com/pbella/Cuis-Ports#ometa-2
>>>
>>> Thanks,
>>> Phil
>>>
>>>
>>> _______________________________________________
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>>> Cuis at jvuletich.org
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>>>
>>
>
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