type 
  LineEditorChoice = enum
    leBasic, leRdstdin
  ReadlineInterruptedException* = object of CatchableError

# choose debug options here
const debugVM* = true
const debugScanner* = false
const debugCompiler* = false
const debugDumpChunk* = true
const assertionsVM* = true # sanity checks in the VM, such as the stack being empty at the end

# choose a line editor for the repl
const lineEditor = leRdstdin

when lineEditor == leRdstdin:
  import rdstdin

proc konLineEditor*: string =
  proc ctrlc = 
    raise newException(ReadlineInterruptedException, "Ctrl+C/D pressed.")
  when lineEditor == leBasic:
    write stdout, "\r-> "
    result = stdin.readLine()
  when lineEditor == leRdstdin:
    var line: string
    let ok = readLineFromStdin("-> ", line)
    if not ok:
      ctrlc()
    return line