There are some solutions, but all a little awkward.
1\. ["do"
notation](https://nim-lang.org/docs/manual_experimental.html#do-notation),
which I believe was moved to _experimental_ just before Nim 1.0, therefore
might be changed or scrapped in a future Nim version.
Personally I think it's even harder to read than the plain `proc` version.
let plusTwo = twice(10) do (n:int) -> int:
echo "Another gratuitious echo"
n + 1
Run
2\. Sugar module with a [statement list
expression](https://nim-lang.org/docs/manual.html#statements-and-expressions-statement-list-expression)
where the last expression in the brackets is treated as the value.
Not idiomatic, wouldn't recommend.
let plusTwo2 = twice(10, n => (
echo "Another gratuitious echo";
n + 1
))
Run
3\. Sugar module with a [block
expression](https://nim-lang.org/docs/manual.html#statements-and-expressions-block-expression).
I almost like this one! Unfortunately if you remove the brackets, you get "
_Error: expression expected, but found 'keyword block'_"
let plusTwo3 = twice(10, n => (block:
echo "Another gratuitious echo"
n + 1
))
Run
Does anyone know, is this a syntax limitation, or could the `=>` operator be
modified to allow a block expression without brackets?
