[antlr-interest] stringtemplate & tree walkers

[Terence Parr]

ooops. that's ast-st-tar.gz (i compressed it). I do the following a  
mistake

$ tar cvfz ast-st.tar ast-st

Should have .tar.gz extension

Ter

On Jul 8, 2009, at 1:32 PM, Terence Parr wrote:

> oh crap. ANTLR v3 uses antlr v2 for codegen.g.  crud. ok,  Here's  
> one that i'm puttinginto book.  source is free at publisher's site  
> so i can push out; description is only in book though ;) This is  
> totally not cleaned up yet but it should give you some hints. It  
> walks a C subset AST and spits it back out as C.
>
> Ter
> <ast-st.tar>
>
>
> On Jul 8, 2009, at 7:50 AM, alexander wrote:
>
>> sorry to bother again ...
>>
>> i downloaded antlr's sources and a
>> grep -r "output \?= \?template" `find -name *.g*`
>>
>> to find any grammars with output=template results in one reference,
>> which is commented out:
>> ./tool/src/main/antlr/org/antlr/grammar/v3/ActionTranslator.g:  //
>> output=template;  TODO: can we make tokens return templates somehow?
>>
>> Terence Parr schrieb:
>>> also codegen.g
>> do you mean
>> tool/src/main/antlr2/org/antlr/grammar/v2/codegen.g ?
>>
>> there is no output using the -> operator :(
>>
>> however, i was able to get things started(jihaaa).
>>
>> now i'm looking for a nice solution for something like this:
>> somerule
>>    : a=something (b=maybe)?
>>        -> sometemplate(a={$a.st}, b={$b.st})
>>    ;
>> here the b is optional, if it's not there b.st will raise a npe.
>>
>> should i surround this with if-then? or is there a simpler solution?
>>
>> thanks in advance.
>>
>> alexander
>>
>>> On Jul 6, 2009, at 3:22 PM, Terence Parr wrote:
>>>
>>>> well, sure. :)  Here's a better pointer: grep for
>>>> StringTemplateGroup.  Should be in key places and in
>>>> CodeGenerator.java :)
>>>> Ter
>>>> On Jul 6, 2009, at 4:47 AM, alexander wrote:
>>>>
>>>>> hi.
>>>>>
>>>>>> On Jun 16, 2009, at 9:59 AM, Arnulf Heller wrote:
>>>>>
>>>>>>> hi there,
>>>>>>>
>>>>>>> are there any complex examples of tree walkers emitting
>>>>>>> stringtemplates?
>>>>>
>>>>>> The source of antlr itself :)
>>>>>
>>>>>> Ter
>>>>>
>>>>> can you give a more detailed location for this? my lazyness  
>>>>> prevents
>>>>> me
>>>>> from reading *all* the sources of antlr ;)
>>>>>
>>>>> i want to emit an xml-dialect from a tree-walker/grammar and i  
>>>>> can't
>>>>> find a good start.
>>>>>
>>>>> thanks in advance
>>>>>
>>>>> alexander
>>>>>
>>>>>
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>>
>>
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>
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