get_command
while (get_command(source, &idx, &cmd, arg, &argc)) {
cabal install
ghc src/*.hs
[4 of 5] Compiling Eval ( src/Eval.hs, src/Eval.o ) src/Eval.hs:41:26: error: parse error on input ‘case’
-XLambdaCase
LambdaCase
In line 4: Exception:UnknownArgumentProvided thrown by: '' Excecution terminated
document.execCommand('copy')