2010/10/15 Joe Python jopyt...@gmail.com:
When I try to call the builtin 'nth-value' , I was expecting a number,
instead I am getting a error.
snip
#;1 (nth-value 2 '(2 3 4 5))
Error: (list-tail) out of range
((2 3 4 5))
/snip
You are expecting NTH-VALUE to do what LIST-REF actually does:
#;1 (list-ref '(2 3 4 5) 2)
4
The documentation says ;
[syntax] (nth-value N EXP)
Returns the Nth value (counting from zero) of the values returned by
expression EXP.
Did I interpret it wrong?
Yes. NTH-VALUE is intended to be used with expressions that return
multiple values, using VALUES:
#;2 (nth-value 2 (values 2 3 4 5))
4
---
Alonso
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