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Re: [Chicken-users] basic Scheme question
From: |
Shawn Rutledge |
Subject: |
Re: [Chicken-users] basic Scheme question |
Date: |
Thu, 23 Oct 2008 23:54:03 -0700 |
On Thu, Oct 23, 2008 at 11:44 PM, Peter Bex <address@hidden> wrote:
> On Thu, Oct 23, 2008 at 10:27:18PM -0700, Shawn Rutledge wrote:
>> #;10> (begin (define update #f) (let ([v 'foo]) (set! update (lambda
>> (d s) (printf "~s was ~s~%" d (eval d)) (set! d s)))))
>> #;11> (update 'v 'bar)
>> Error: unbound variable: v
>>
>> What I'm trying to do is pass the name of a let-bound variable in to a
>> lambda defined within the let context, in order to tell that lambda to
>> access that let-bound variable. eval doesn't work because it looks in
>> the outer environment, right? (in which v is not bound)
>
> Eval only sees the top-level environment. It may be possible to use
> the environments egg to construct your own environment containing v.
I thought of that, but also thought there must be a generic Scheme way
to do this.
- [Chicken-users] basic Scheme question, Shawn Rutledge, 2008/10/24
- Re: [Chicken-users] basic Scheme question, Peter Bex, 2008/10/24
- Re: [Chicken-users] basic Scheme question,
Shawn Rutledge <=
- Re: [Chicken-users] basic Scheme question, Drake Wilson, 2008/10/24
- Re: [Chicken-users] basic Scheme question, Shawn Rutledge, 2008/10/24
- Re: [Chicken-users] basic Scheme question, Drake Wilson, 2008/10/24
- Re: [Chicken-users] basic Scheme question, Shawn Rutledge, 2008/10/24
- Re: [Chicken-users] basic Scheme question, Drake Wilson, 2008/10/24
- Re: [Chicken-users] basic Scheme question, John Cowan, 2008/10/24
- Re: [Chicken-users] basic Scheme question, Shawn Rutledge, 2008/10/26
- Re: [Chicken-users] basic Scheme question, John Cowan, 2008/10/24
- Re: [Chicken-users] basic Scheme question, Elf, 2008/10/28
Re: [Chicken-users] basic Scheme question, Elf, 2008/10/27