Procs

proc warn(message: string) {....raises: [Exception, ValueError, OSError, IOError,
                                      EOFError, KeyError], tags: [RootEffect].}

proc warn_explicit(message: string) {....raises: [Exception, ValueError, OSError,
    IOError, EOFError, KeyError], tags: [RootEffect].}

proc formatwarning(message: string): string {.
    ...raises: [Exception, ValueError, OSError, IOError, EOFError, KeyError],
    tags: [RootEffect].}

proc resetwarnings(message: string) {....raises: [Exception, ValueError, OSError,
    IOError, EOFError, KeyError], tags: [RootEffect].}