[racket] DrRacket 6.0.1 with R5RS user-initial-environment

I am using R5RS because I have to learn Scheme for a class.
When I looked up some examples of using eval and all the ones that I saw
for some reason had that
user-initial-environment. So now it works thank you.


On 06/02/2014 02:31 PM, Danny Yoo wrote:
> On Mon, Jun 2, 2014 at 10:45 AM, Tim <vis.314.15 at gmail.com> wrote:
>> Hi, I am using DrRacket 6.0.1 with language R5RS when I try to evaluate the
>> statement:
>> (eval '(+ 1 2) user-initial-environment)
>> I get the error:
>> "user-initial-environment: undefined;"
>>
>>  Am I doing something wrong? Thank you.
> Hi Tim,
>
> (Is there a reason why you're using r5rs, out of curiosity?)
>
> Reading docs... ok!  Is user-initial-environment a part of r5rs, or an
> extension to the standard?  I'm looking at:
>
>     http://groups.csail.mit.edu/mac/ftpdir/scheme-reports/r5rs-html/r5rs_8.html#SEC65
>
> and I see no occurrence of "user-initial-environment" in the official
> R5RS standard.
>
>
> The following does appear to do something:
>
> ###########################################
> (display (eval '(+ 1 2) (scheme-report-environment 5)))
> ###########################################