src/streams/gray/conditions.lisp

   1 ;;;; -*- Mode: Lisp; indent-tabs-mode: nil -*-
   2 ;;;
   3 ;;; --- Gray stream conditions.
   4 ;;;
   5
   6 (in-package :iolib.streams)
   7
   8 (define-condition hangup (stream-error)
   9   ()
  10   (:report (lambda (c s)
  11              (format s "Stream ~S hang up."
  12                      (stream-error-stream c))))
  13   (:documentation "Condition signaled when the underlying device of a stream
  14 is closed by the remote end while writing to it."))
  15
  16 (define-condition no-characters-to-unread (stream-error)
  17   ()
  18   (:report (lambda (c s)
  19              (format s "No uncommitted character to unread on stream ~S."
  20                      (stream-error-stream c))))
  21   (:documentation "Condition signaled when UNREAD-CHAR is called on a stream either:
  22 1) without having been preceded by a READ-CHAR, or
  23 2) after a PEEK-CHAR"))