src/code/early-format.lisp

   1 ;;;; This software is part of the SBCL system. See the README file for
   2 ;;;; more information.
   3 ;;;;
   4 ;;;; This software is derived from the CMU CL system, which was
   5 ;;;; written at Carnegie Mellon University and released into the
   6 ;;;; public domain. The software is in the public domain and is
   7 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
   8 ;;;; files for more information.
   9
  10 (in-package "SB!FORMAT")
  11
  12 (defparameter *format-whitespace-chars*
  13   (vector #\space
  14           #\newline
  15           ;; We leave out this non-STANDARD-CHARACTER entry from this table
  16           ;; when we're running in the cross-compilation host, since ANSI
  17           ;; doesn't require the cross-compilation host to know what a tab is.
  18           #-sb-xc-host (code-char tab-char-code)))
  19
  20 (defvar *format-directive-expanders*
  21   (make-array base-char-code-limit :initial-element nil))
  22 (defvar *format-directive-interpreters*
  23   (make-array base-char-code-limit :initial-element nil))
  24
  25 (defvar *default-format-error-control-string* nil)
  26 (defvar *default-format-error-offset* nil)
  27 \f
  28 ;;;; specials used to communicate information
  29
  30 ;;; Used both by the expansion stuff and the interpreter stuff. When it is
  31 ;;; non-NIL, up-up-and-out (~:^) is allowed. Otherwise, ~:^ isn't allowed.
  32 (defvar *up-up-and-out-allowed* nil)
  33
  34 ;;; Used by the interpreter stuff. When it's non-NIL, it's a function
  35 ;;; that will invoke PPRINT-POP in the right lexical environemnt.
  36 (declaim (type (or null function) *logical-block-popper*))
  37 (defvar *logical-block-popper* nil)
  38
  39 ;;; Used by the expander stuff. This is bindable so that ~<...~:>
  40 ;;; can change it.
  41 (defvar *expander-next-arg-macro* 'expander-next-arg)
  42
  43 ;;; Used by the expander stuff. Initially starts as T, and gets set to NIL
  44 ;;; if someone needs to do something strange with the arg list (like use
  45 ;;; the rest, or something).
  46 (defvar *only-simple-args*)
  47
  48 ;;; Used by the expander stuff. We do an initial pass with this as NIL.
  49 ;;; If someone doesn't like this, they (THROW 'NEED-ORIG-ARGS NIL) and we try
  50 ;;; again with it bound to T. If this is T, we don't try to do anything
  51 ;;; fancy with args.
  52 (defvar *orig-args-available* nil)
  53
  54 ;;; Used by the expander stuff. List of (symbol . offset) for simple args.
  55 (defvar *simple-args*)