nondescript/src/ndspkg/config.nim

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

# compiler debug options
const debugScanner* = false
const debugCompiler* = false
const debugDumpChunk* = defined(debug)
const assertionsCompiler* = true # sanity checks in the compiler
# vm debug options (setting any to true will slow runtime down!)
const debugVM* = defined(debug)
const assertionsVM* = defined(debug) # sanity checks in the VM, such as the stack being empty at the end
const profileInstructions* = defined(ndsprofile) # if true, the time spent on every opcode is measured

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

when lineEditor == leRdstdin:
  import rdstdin

proc ndLineEditor*: 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