Local variable in map task? - netlogo

Question

Is there a way to define a local variable in an inline reporter task with map?
This
to go
show map [? * ?] [1 2 3]
end
displays [1 4 9], as expected. What's in the first set of brackets is a "reporter task".
What if I want to use let in the task?
to go
show map [
let sq ? * ?
sq + 1
]
[1 2 3]
end
Error: "Expected a reporter task here, rather than a list or block." The entire first bracketed expression is highlighted as what's producing the syntax error.
Maybe I need to add the task keyword to tell NetLogo that this is a task? The Programming Guide says that "the task primitive is optional" for map but it's worth a try. This works:
to go
show map (task [? * ?]) [1 2 3]
end
but this doesn't:
to go
show map (task [
let sq ? * ?
sq + 1
])
[1 2 3]
end
The second instance of sq is highlighted, with the error message "Expected command." It's odd the error is different this time.
Maybe I need to add report?
to go
show map (task [
let sq ? * ?
report sq + 1
])
[1 2 3]
end
This is syntactically acceptable, but when I run it I get a runtime error: "MAP expected input to be a reporter task but got the command task (command task from: procedure GO) instead."
The only alternative I've found that works is to define a separate reporter:
to go
show map square-plus-one [1 2 3]
end
to-report square-plus-one [n]
let sq n * n
report sq + 1
end
This's easy enough. However, I'm curious whether there's something I'm missing. Is there a way to use local variables in an inline reporter task?

Answer 1

Reporter tasks with complex reporters are not currently possible. See the “Limitations” section in the Programming Guide, under "Tasks":
Reporter tasks can't contain commands, only a single reporter expression.
https://github.com/NetLogo/NetLogo/issues/351 is related — it specifically discusses the problem of needing to refer to a ? variable from an outer scope.