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F# parser feature?
f#
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> [3..-1..2];;
val it : int list = [3; 2]
> let a = 3 in [a..-1..2];;

  let a = 3 in [a..-1..2];;
  ------------------^^^^

stdin(34,19): error FS0001: The type 'int' does not support any operators named
'..-'.
> let a = 3 in [a..(-1)..2];;
val it : int list = [3; 2]

Is that planned feature?

.

You can define your own operators in F#:

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let (..-) x y = -(x * y)
let a = 3 
let r = [a..-1..2]
printfn "%A" r

which means that you need to use more whitespace or parens to disambiguate cases where 'a bunch of operator symbols run together' are not to be treated as a single operator.

By on 11/15/2008 11:19 AM ()

Heh. Also:

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> let a = 3 in [a.. -1 ..2];;

val it : int list = [3; 2]
By on 11/15/2008 10:59 AM ()

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