[Timber] Compiler milestone

[Viktor Leijon]

Hello all.

I missed that reply-to was set, how embarassing.

Anyhow, I was simply saying that I had a little diff to the parser,  
and that I was going to send some test cases later.

/Viktor

On 20 feb 2007, at 17.19, Viktor Leijon wrote:

> Hej.
>
> Det första du ska få är min parser-diff:
> pub98-187:~/tmp/timber/timber leijon$ darcs diff Parser.y
> 192c192
> <         : selvar exp                          { Field $1  $2 }
> ---
> >         : selvar '=' exp                              { Field $1   
> $3 }
>
> Jag återkommer med testfall som jag tycker borde fungera.
>
> /Viktor
>
> On 20 feb 2007, at 17.12, Johan Nordlander wrote:
>
>> Friends,
>>
>> I'm happy to report that the Timber compiler is now in a such a  
>> state that I believe it's time to switch focus to testing.  All  
>> passes are implemented and no crucial functionality is left out.
>>
>> However, very few test runs have been done up to this point, which  
>> means that we are still far from having a running compiler.  The  
>> run-time system also haven't been checked in yet, but it will be  
>> in a day or two.  Still I'd be happy for some help producing dry- 
>> run test examples at this stage, before we risk getting stuck with  
>> issues that relate to I/O and Unix interfacing.
>>
>> My suggestion is that we split the testing activities into two  
>> phases:
>>
>> 1. Random testing of everyone's favorite code snippets.  First  
>> goal is to produce C output only, then in a few days also to make  
>> them run.  This is likely to draw attention to many of the (no  
>> doubt) numerous simple and silly bugs that hinder normal  
>> operation.  While this activity might generate a lot of error  
>> reports initially it should hopefully also lead to a relatively  
>> well-behaved compiler in a rather short time.  I expect to do most  
>> of the bug-hunting myself while in this phase.
>>
>> 2. Systematic testing of all branches of every individual pass.   
>> This should probably be combined with careful documentation,  
>> perhaps also with writing/revising the language definition.  To  
>> make this work feasible we should split it up in some sensible  
>> way, although it's probably wise to wait until phase 1 is over  
>> until we make an attempt at organizing phase 2.
>>
>> I also have a list of minor areas of the compiler that still need  
>> to be completed, as well as some discussion points regarding the  
>> actual language design.  But again it's probably best to defer  
>> these issues until we at least have a compiler that runs the basic  
>> test examples.
>>
>> So if you're interested in the long term goal and prepared for  
>> some initial disappointments, pull out the latest darcs version  
>> and generate some error reports!  Send them directly to me and  
>> I'll respond to the list after each update to the sources.
>>
>> Happy lumbering!
>> Johan
>>
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