(in-package "SB!IMPL")
(sb!xc:deftype attribute-table ()
- '(simple-array (unsigned-byte 8) (#.char-code-limit)))
+ '(simple-array (unsigned-byte 8) (#.sb!xc:char-code-limit)))
+
+;;; constants for readtable character attributes. These are all as in
+;;; the manual.
+(def!constant +char-attr-whitespace+ 0)
+(def!constant +char-attr-terminating-macro+ 1)
+(def!constant +char-attr-escape+ 2)
+(def!constant +char-attr-constituent+ 3)
+(def!constant +char-attr-constituent-dot+ 4)
+(def!constant +char-attr-constituent-expt+ 5)
+(def!constant +char-attr-constituent-slash+ 6)
+(def!constant +char-attr-constituent-digit+ 7)
+(def!constant +char-attr-constituent-sign+ 8)
+;; the "9" entry intentionally left blank for some reason -- WHN 19990806
+(def!constant +char-attr-multiple-escape+ 10)
+(def!constant +char-attr-package-delimiter+ 11)
+(def!constant +char-attr-delimiter+ 12) ; (a fake for READ-UNQUALIFIED-TOKEN)
(sb!xc:defstruct (readtable (:conc-name nil)
- (:predicate readtablep))
+ (:predicate readtablep)
+ ;; ANSI requires a CL:COPY-READTABLE to do
+ ;; a deep copy, so the DEFSTRUCT-generated
+ ;; default is not suitable.
+ (:copier nil))
#!+sb-doc
- "Readtable is a data structure that maps characters into syntax
+ "A READTABLE is a data structure that maps characters into syntax
types for the Common Lisp expression reader."
;; The CHARACTER-ATTRIBUTE-TABLE is a vector of CHAR-CODE-LIMIT
;; integers for describing the character type. Conceptually, there
- ;; are 4 distinct "primary" character attributes: WHITESPACE,
- ;; TERMINATING-MACRO, ESCAPE, and CONSTITUENT. Non-terminating
+ ;; are 4 distinct "primary" character attributes:
+ ;; +CHAR-ATTR-WHITESPACE+, +CHAR-ATTR-TERMINATING-MACRO+,
+ ;; +CHAR-ATTR-ESCAPE+, and +CHAR-ATTR-CONSTITUENT+. Non-terminating
;; macros (such as the symbol reader) have the attribute
- ;; CONSTITUENT.
+ ;; +CHAR-ATTR-CONSTITUENT+.
;;
- ;; In order to make the READ-TOKEN fast, all this information is
- ;; stored in the character attribute table by having different
- ;; varieties of constituents.
+ ;; In order to make READ-TOKEN fast, all this information is stored
+ ;; in the character attribute table by having different varieties of
+ ;; constituents.
(character-attribute-table
- (make-array char-code-limit :element-type '(unsigned-byte 8)
- :initial-element constituent)
+ (make-array sb!xc:char-code-limit
+ :element-type '(unsigned-byte 8)
+ :initial-element +char-attr-constituent+)
:type attribute-table)
;; The CHARACTER-MACRO-TABLE is a vector of CHAR-CODE-LIMIT
;; functions. One of these functions called with appropriate
;; implement user-defined read-macros, system read-macros, and the
;; number-symbol reader.
(character-macro-table
- (make-array char-code-limit :initial-element #'undefined-macro-char)
- :type (simple-vector #.char-code-limit))
- ;; DISPATCH-TABLES entry, which is an alist from dispatch characters
- ;; to vectors of CHAR-CODE-LIMIT functions, for use in defining
- ;; dispatching macros (like #-macro).
+ (make-array sb!xc:char-code-limit :initial-element #'undefined-macro-char)
+ :type (simple-vector #.sb!xc:char-code-limit))
+ ;; an alist from dispatch characters to vectors of CHAR-CODE-LIMIT
+ ;; functions, for use in defining dispatching macros (like #-macro)
(dispatch-tables () :type list)
(readtable-case :upcase :type (member :upcase :downcase :preserve :invert)))