2012/5/12 Matthias Felleisen <matth...@ccs.neu.edu>:
>
> On May 12, 2012, at 12:54 PM, Jens Axel Søgaard wrote:
>
>> The syntax
>> {john .age} should evaluate as (person-age john)
>> since john is an instance of a person structure.
>>
>> Using information from structure-type-info I can construct the
>> identifier person-age, but I can not figure how to retrieve the
>> actual accessor without using eval.
>>
>> This means that {john .age} only works in the repl and not
>> in a module context.
>>
>> Any pointers for improving the macro dot (which implements this)
>> is appreciated.
>
>
> Since {john .age} is syntax, you might be able to grab the namespace at that
> point and use the namespace for an evaluation.
I tried using namespace-anchor for that purpose, but couldn't figure
out how to.
> ;; ---
>
> My preferred alternative is to equip structs that should work with this
> syntax with
> a prop so that I can look up the accessor.
Been down that road before ;-)
http://lists.racket-lang.org/users/archive/2007-March/016756.html
/Jens Axel
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