[plt-scheme] call/cc and values

On Feb 15, 2006, at 12:54 PM, Carl Eastlund wrote:

> On 2/15/06, pedro pinto <pedro.e.pinto at gmail.com> wrote:
>> Hi there,
>>
>> Should this work?
>>
>> (let/ec return
>>   (return (values 1 2)))
>>
>>
>> If not, why not?
>
> This won't work.  You are applying "return" as a function, and as its
> first argument, giving it two values.  Each argument position expects
> only one value.  If you want to pass two values into an explicit
> continuation the same way (values 1 2) passes two values into a
> continuation, you want to use call-with-values like this:
>
> (let/ec return (call-with-values (lambda () (values 1 2)) return))

Carl is right.  I'm wrong.  Thanks, Carl!

John

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