I'm trying out Haskell in GHCi on Windows. In the tutorial I'm following, a function name is enclosed in backticks: x `mod` 7
. However, I can't enter the character in GHCi.
The backtick character has ASCII value 096, but GHCI does not allow Alt + number to insert any character. Copying/pasting doesn't work either. What should I do?
I don't know how send a backtick to ghci if your keyboard doesn't have it. But this little technical issue shouldn't stop you from trying out Haskell!
You can program in Haskell without backticks by using f a b
instead of a `f` b
. In your example, mod x 7
.
You can set your keyboard layout to us-american for programming. While it takes some practice to find the keys with the wrong labels on the physical keyboard, it can be convenient to have [
, ]
, {
and }
more accessible, and in your case, have the backtick at all.
You can paste the backtick from the clipboard. (Activate "quick-edit mode" and "paste mode" from the command window's settings, and then use the right mouse button to paste).
Maybe using a wrapper around the command window helps? I sometimes use Console2 and sometimes M-x shell
in Emacs.
Maybe WinGHCi helps? It supports copy and paste, at least.
See Ørjan Johansen's answer for how to add a custom keybinding to ghci.
Good luck with Haskell!