[r6rs-discuss] [Formal] (r6rs base) must also export _ and ... at level 1

[Abdulaziz Ghuloum]

On Jan 24, 2007, at 7:38 AM, AndrevanTonder wrote:

> On Wed, 24 Jan 2007, Abdulaziz Ghuloum wrote:
>
>> Andre van Tonder wrote:
>>
>>> It is stated on p.25 that (r6rs base) exports syntax-rules and  
>>> identifier-syntax at level 1.  This is insufficient for writing  
>>> most useful macros unless the identifiers ... and _ are also  
>>> exported for level 1.
>> Three questions:
>> 1. Why would this be necessary?
>
> If they are not exported, how would you propose to handle renaming,  
> prefixing, or excepting them in a client library?

Your statement originally said that exporting syntax-rules and  
identifier-syntax at level 1 is "insufficient for writing most useful  
macros unless the identifiers ... and _ are also exported for level  
1".   My question was about that statement.  I don't see how  
exporting ... and _ is necessary for writing most useful macros.   
Please explain how the two are related.  (I don't see the connection  
between your answer and your original statement.)

Aziz,,,