Cannot bind variables with `let` about hyper-haskell HOT 5 CLOSED

Try

let x = 5 in
show x

let 
  f = (* 2)
  x = 5
in
  show $ f x

from hyper-haskell.

Sure! That does work. However, x = 5 or let x = 5 would be what would work in ghci, and I probably foolishly expected it to work in HyperHaskell as well.

from hyper-haskell.

Sorry about the confusion. At the moment, only Haskell expressions (as opposed to statements) can be parsed and evaluated. Statements (e.g. let x = …, x <- someIO etc) are planned for Level β.

from hyper-haskell.

As of commit 83d4963 , you can execute monadic statements. In particular, you can introduce new variables with <-, e.g.

test <- return "haskell"

The let statement is not supported just yet.

from hyper-haskell.

The let statement is now supported in version 0.2.1.0.

from hyper-haskell.