;;; installed-scm-file
-;;;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
+;;;; Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002,2003,2004,2005,2006,2007
+;;;; Free Software Foundation, Inc.
+;;;;
+;;;; This library is free software; you can redistribute it and/or
+;;;; modify it under the terms of the GNU Lesser General Public
+;;;; License as published by the Free Software Foundation; either
+;;;; version 2.1 of the License, or (at your option) any later version.
;;;;
-;;;; This program is free software; you can redistribute it and/or modify
-;;;; it under the terms of the GNU General Public License as published by
-;;;; the Free Software Foundation; either version 2, or (at your option)
-;;;; any later version.
-;;;;
-;;;; This program is distributed in the hope that it will be useful,
+;;;; This library is distributed in the hope that it will be useful,
;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
-;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-;;;; GNU General Public License for more details.
-;;;;
-;;;; You should have received a copy of the GNU General Public License
-;;;; along with this software; see the file COPYING. If not, write to
-;;;; the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
-;;;; Boston, MA 02111-1307 USA
+;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+;;;; Lesser General Public License for more details.
;;;;
+;;;; You should have received a copy of the GNU Lesser General Public
+;;;; License along with this library; if not, write to the Free Software
+;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+;;;;
+
\f
+;;; Commentary:
+
;;; This file is the first thing loaded into Guile. It adds many mundane
;;; definitions and a few that are interesting.
;;;
-;;; The module system (hence the hierarchical namespace) are defined in this
+;;; The module system (hence the hierarchical namespace) are defined in this
;;; file.
;;;
+;;; Code:
+
\f
+
;;; {Features}
-;;
+;;;
(define (provide sym)
(if (not (memq sym *features*))
(set! *features* (cons sym *features*))))
-;;; Return #t iff FEATURE is available to this Guile interpreter.
-;;; In SLIB, provided? also checks to see if the module is available.
-;;; We should do that too, but don't.
+;; Return #t iff FEATURE is available to this Guile interpreter. In SLIB,
+;; provided? also checks to see if the module is available. We should do that
+;; too, but don't.
+
(define (provided? feature)
(and (memq feature *features*) #t))
-;;; presumably deprecated.
-(define feature? provided?)
+;; let format alias simple-format until the more complete version is loaded
-;;; let format alias simple-format until the more complete version is loaded
(define format simple-format)
+;; this is scheme wrapping the C code so the final pred call is a tail call,
+;; per SRFI-13 spec
+(define (string-any char_pred s . rest)
+ (let ((start (if (null? rest)
+ 0 (car rest)))
+ (end (if (or (null? rest) (null? (cdr rest)))
+ (string-length s) (cadr rest))))
+ (if (and (procedure? char_pred)
+ (> end start)
+ (<= end (string-length s))) ;; let c-code handle range error
+ (or (string-any-c-code char_pred s start (1- end))
+ (char_pred (string-ref s (1- end))))
+ (string-any-c-code char_pred s start end))))
+
+;; this is scheme wrapping the C code so the final pred call is a tail call,
+;; per SRFI-13 spec
+(define (string-every char_pred s . rest)
+ (let ((start (if (null? rest)
+ 0 (car rest)))
+ (end (if (or (null? rest) (null? (cdr rest)))
+ (string-length s) (cadr rest))))
+ (if (and (procedure? char_pred)
+ (> end start)
+ (<= end (string-length s))) ;; let c-code handle range error
+ (and (string-every-c-code char_pred s start (1- end))
+ (char_pred (string-ref s (1- end))))
+ (string-every-c-code char_pred s start end))))
+
+;; A variant of string-fill! that we keep for compatability
+;;
+(define (substring-fill! str start end fill)
+ (string-fill! str fill start end))
+
+\f
+
+;;; {EVAL-CASE}
+;;;
+
+;; (eval-case ((situation*) forms)* (else forms)?)
+;;
+;; Evaluate certain code based on the situation that eval-case is used
+;; in. There are three situations defined. `load-toplevel' triggers for
+;; code evaluated at the top-level, for example from the REPL or when
+;; loading a file. `compile-toplevel' triggers for code compiled at the
+;; toplevel. `execute' triggers during execution of code not at the top
+;; level.
+
+(define eval-case
+ (procedure->memoizing-macro
+ (lambda (exp env)
+ (define (toplevel-env? env)
+ (or (not (pair? env)) (not (pair? (car env)))))
+ (define (syntax)
+ (error "syntax error in eval-case"))
+ (let loop ((clauses (cdr exp)))
+ (cond
+ ((null? clauses)
+ #f)
+ ((not (list? (car clauses)))
+ (syntax))
+ ((eq? 'else (caar clauses))
+ (or (null? (cdr clauses))
+ (syntax))
+ (cons 'begin (cdar clauses)))
+ ((not (list? (caar clauses)))
+ (syntax))
+ ((and (toplevel-env? env)
+ (memq 'load-toplevel (caar clauses)))
+ (cons 'begin (cdar clauses)))
+ (else
+ (loop (cdr clauses))))))))
+
+\f
+
+;; Before compiling, make sure any symbols are resolved in the (guile)
+;; module, the primary location of those symbols, rather than in
+;; (guile-user), the default module that we compile in.
+
+(eval-case
+ ((compile-toplevel)
+ (set-current-module (resolve-module '(guile)))))
+
+;;; {Defmacros}
+;;;
+;;; Depends on: features, eval-case
+;;;
+
+(define macro-table (make-weak-key-hash-table 61))
+(define xformer-table (make-weak-key-hash-table 61))
+
+(define (defmacro? m) (hashq-ref macro-table m))
+(define (assert-defmacro?! m) (hashq-set! macro-table m #t))
+(define (defmacro-transformer m) (hashq-ref xformer-table m))
+(define (set-defmacro-transformer! m t) (hashq-set! xformer-table m t))
+
+(define defmacro:transformer
+ (lambda (f)
+ (let* ((xform (lambda (exp env)
+ (copy-tree (apply f (cdr exp)))))
+ (a (procedure->memoizing-macro xform)))
+ (assert-defmacro?! a)
+ (set-defmacro-transformer! a f)
+ a)))
+
+
+(define defmacro
+ (let ((defmacro-transformer
+ (lambda (name parms . body)
+ (let ((transformer `(lambda ,parms ,@body)))
+ `(eval-case
+ ((load-toplevel compile-toplevel)
+ (define ,name (defmacro:transformer ,transformer)))
+ (else
+ (error "defmacro can only be used at the top level")))))))
+ (defmacro:transformer defmacro-transformer)))
+
+
+;; XXX - should the definition of the car really be looked up in the
+;; current module?
+
+(define (macroexpand-1 e)
+ (cond
+ ((pair? e) (let* ((a (car e))
+ (val (and (symbol? a) (local-ref (list a)))))
+ (if (defmacro? val)
+ (apply (defmacro-transformer val) (cdr e))
+ e)))
+ (#t e)))
+
+(define (macroexpand e)
+ (cond
+ ((pair? e) (let* ((a (car e))
+ (val (and (symbol? a) (local-ref (list a)))))
+ (if (defmacro? val)
+ (macroexpand (apply (defmacro-transformer val) (cdr e)))
+ e)))
+ (#t e)))
+
+(provide 'defmacro)
+
\f
+
+;;; {Deprecation}
+;;;
+;;; Depends on: defmacro
+;;;
+
+(defmacro begin-deprecated forms
+ (if (include-deprecated-features)
+ `(begin ,@forms)
+ (begin)))
+
+\f
+
;;; {R4RS compliance}
+;;;
-(primitive-load-path "ice-9/r4rs.scm")
+(primitive-load-path "ice-9/r4rs")
\f
-;;; {Simple Debugging Tools}
-;;
+;;; {Simple Debugging Tools}
+;;;
;; peek takes any number of arguments, writes them to the
;; current ouput port, and returns the last argument.
(car (last-pair stuff)))))
\f
+
;;; {Trivial Functions}
;;;
-(define (id x) x)
-(define (1+ n) (+ n 1))
-(define (-1+ n) (+ n -1))
-(define 1- -1+)
-(define return-it noop)
+(define (identity x) x)
(define (and=> value procedure) (and value (procedure value)))
-(define (make-hash-table k) (make-vector k '()))
+(define call/cc call-with-current-continuation)
-;;; apply-to-args is functionally redunant with apply and, worse,
+;;; apply-to-args is functionally redundant with apply and, worse,
;;; is less general than apply since it only takes two arguments.
;;;
-;;; On the other hand, apply-to-args is a syntacticly convenient way to
+;;; On the other hand, apply-to-args is a syntacticly convenient way to
;;; perform binding in many circumstances when the "let" family of
;;; of forms don't cut it. E.g.:
;;;
;;; (apply-to-args (return-3d-mouse-coords)
-;;; (lambda (x y z)
+;;; (lambda (x y z)
;;; ...))
;;;
(define (apply-to-args args fn) (apply fn args))
-\f
-;;; {Integer Math}
-;;;
-
-(define (ipow-by-squaring x k acc proc)
- (cond ((zero? k) acc)
- ((= 1 k) (proc acc x))
- (else (ipow-by-squaring (proc x x)
- (quotient k 2)
- (if (even? k) acc (proc acc x))
- proc))))
+(defmacro false-if-exception (expr)
+ `(catch #t (lambda () ,expr)
+ (lambda args #f)))
-(define string-character-length string-length)
+\f
+;;; {General Properties}
+;;;
+;; This is a more modern interface to properties. It will replace all
+;; other property-like things eventually.
-;; A convenience function for combining flag bits. Like logior, but
-;; handles the cases of 0 and 1 arguments.
-;;
-(define (flags . args)
- (cond
- ((null? args) 0)
- ((null? (cdr args)) (car args))
- (else (apply logior args))))
+(define (make-object-property)
+ (let ((prop (primitive-make-property #f)))
+ (make-procedure-with-setter
+ (lambda (obj) (primitive-property-ref prop obj))
+ (lambda (obj val) (primitive-property-set! prop obj val)))))
\f
+
;;; {Symbol Properties}
;;;
\f
-;;; {Line and Delimited I/O}
-
-;;; corresponds to SCM_LINE_INCREMENTORS in libguile.
-(define scm-line-incrementors "\n")
-
-(define (read-line! string . maybe-port)
- (let* ((port (if (pair? maybe-port)
- (car maybe-port)
- (current-input-port))))
- (let* ((rv (%read-delimited! scm-line-incrementors
- string
- #t
- port))
- (terminator (car rv))
- (nchars (cdr rv)))
- (cond ((and (= nchars 0)
- (eof-object? terminator))
- terminator)
- ((not terminator) #f)
- (else nchars)))))
-
-(define (read-delimited! delims buf . args)
- (let* ((num-args (length args))
- (port (if (> num-args 0)
- (car args)
- (current-input-port)))
- (handle-delim (if (> num-args 1)
- (cadr args)
- 'trim))
- (start (if (> num-args 2)
- (caddr args)
- 0))
- (end (if (> num-args 3)
- (cadddr args)
- (string-length buf))))
- (let* ((rv (%read-delimited! delims
- buf
- (not (eq? handle-delim 'peek))
- port
- start
- end))
- (terminator (car rv))
- (nchars (cdr rv)))
- (cond ((or (not terminator) ; buffer filled
- (eof-object? terminator))
- (if (zero? nchars)
- (if (eq? handle-delim 'split)
- (cons terminator terminator)
- terminator)
- (if (eq? handle-delim 'split)
- (cons nchars terminator)
- nchars)))
- (else
- (case handle-delim
- ((trim peek) nchars)
- ((concat) (string-set! buf (+ nchars start) terminator)
- (+ nchars 1))
- ((split) (cons nchars terminator))
- (else (error "unexpected handle-delim value: "
- handle-delim))))))))
-
-(define (read-delimited delims . args)
- (let* ((port (if (pair? args)
- (let ((pt (car args)))
- (set! args (cdr args))
- pt)
- (current-input-port)))
- (handle-delim (if (pair? args)
- (car args)
- 'trim)))
- (let loop ((substrings ())
- (total-chars 0)
- (buf-size 100)) ; doubled each time through.
- (let* ((buf (make-string buf-size))
- (rv (%read-delimited! delims
- buf
- (not (eq? handle-delim 'peek))
- port))
- (terminator (car rv))
- (nchars (cdr rv))
- (join-substrings
- (lambda ()
- (apply string-append
- (reverse
- (cons (if (and (eq? handle-delim 'concat)
- (not (eof-object? terminator)))
- (string terminator)
- "")
- (cons (make-shared-substring buf 0 nchars)
- substrings))))))
- (new-total (+ total-chars nchars)))
- (cond ((not terminator)
- ;; buffer filled.
- (loop (cons (substring buf 0 nchars) substrings)
- new-total
- (* buf-size 2)))
- ((eof-object? terminator)
- (if (zero? new-total)
- (if (eq? handle-delim 'split)
- (cons terminator terminator)
- terminator)
- (if (eq? handle-delim 'split)
- (cons (join-substrings) terminator)
- (join-substrings))))
- (else
- (case handle-delim
- ((trim peek concat) (join-substrings))
- ((split) (cons (join-substrings) terminator))
-
-
- (else (error "unexpected handle-delim value: "
- handle-delim)))))))))
-
-;;; read-line [PORT [HANDLE-DELIM]] reads a newline-terminated string
-;;; from PORT. The return value depends on the value of HANDLE-DELIM,
-;;; which may be one of the symbols `trim', `concat', `peek' and
-;;; `split'. If it is `trim' (the default), the trailing newline is
-;;; removed and the string is returned. If `concat', the string is
-;;; returned with the trailing newline intact. If `peek', the newline
-;;; is left in the input port buffer and the string is returned. If
-;;; `split', the newline is split from the string and read-line
-;;; returns a pair consisting of the truncated string and the newline.
-
-(define (read-line . args)
- (let* ((port (if (null? args)
- (current-input-port)
- (car args)))
- (handle-delim (if (> (length args) 1)
- (cadr args)
- 'trim))
- (line/delim (%read-line port))
- (line (car line/delim))
- (delim (cdr line/delim)))
- (case handle-delim
- ((trim) line)
- ((split) line/delim)
- ((concat) (if (and (string? line) (char? delim))
- (string-append line (string delim))
- line))
- ((peek) (if (char? delim)
- (unread-char delim port))
- line)
- (else
- (error "unexpected handle-delim value: " handle-delim)))))
-
-\f
;;; {Arrays}
;;;
-(if (provided? 'array)
- (primitive-load-path "ice-9/arrays.scm"))
+(define (array-shape a)
+ (map (lambda (ind) (if (number? ind) (list 0 (+ -1 ind)) ind))
+ (array-dimensions a)))
\f
+
;;; {Keywords}
;;;
-(define (symbol->keyword symbol)
- (make-keyword-from-dash-symbol (symbol-append '- symbol)))
-
-(define (keyword->symbol kw)
- (let ((sym (keyword-dash-symbol kw)))
- (string->symbol (substring sym 1 (string-length sym)))))
-
(define (kw-arg-ref args kw)
(let ((rem (member kw args)))
(and rem (pair? (cdr rem)) (cadr rem))))
\f
;;; {Structs}
+;;;
(define (struct-layout s)
(struct-ref (struct-vtable s) vtable-index-layout))
\f
+
;;; {Records}
;;;
new-port))
;; 0: type-name, 1: fields
-(define record-type-vtable
+(define record-type-vtable
(make-vtable-vtable "prpr" 0
(lambda (s p)
(cond ((eq? s record-type-vtable)
(let ((printer-fn (and (pair? opt) (car opt))))
(let ((struct (make-struct record-type-vtable 0
(make-struct-layout
- (apply symbol-append
+ (apply string-append
(map (lambda (f) "pw") fields)))
(or printer-fn
(lambda (s p)
(define (record-constructor rtd . opt)
(let ((field-names (if (pair? opt) (car opt) (record-type-fields rtd))))
- (eval `(lambda ,field-names
- (make-struct ',rtd 0 ,@(map (lambda (f)
- (if (memq f field-names)
- f
- #f))
- (record-type-fields rtd)))))))
-
+ (primitive-eval
+ `(lambda ,field-names
+ (make-struct ',rtd 0 ,@(map (lambda (f)
+ (if (memq f field-names)
+ f
+ #f))
+ (record-type-fields rtd)))))))
+
(define (record-predicate rtd)
(lambda (obj) (and (struct? obj) (eq? rtd (struct-vtable obj)))))
+(define (%record-type-error rtd obj) ;; private helper
+ (or (eq? rtd (record-type-descriptor obj))
+ (scm-error 'wrong-type-arg "%record-type-check"
+ "Wrong type record (want `~S'): ~S"
+ (list (record-type-name rtd) obj)
+ #f)))
+
(define (record-accessor rtd field-name)
- (let* ((pos (list-index (record-type-fields rtd) field-name)))
+ (let ((pos (list-index (record-type-fields rtd) field-name)))
(if (not pos)
(error 'no-such-field field-name))
- (eval `(lambda (obj)
- (and (eq? ',rtd (record-type-descriptor obj))
- (struct-ref obj ,pos))))))
+ (lambda (obj)
+ (if (eq? (struct-vtable obj) rtd)
+ (struct-ref obj pos)
+ (%record-type-error rtd obj)))))
(define (record-modifier rtd field-name)
- (let* ((pos (list-index (record-type-fields rtd) field-name)))
+ (let ((pos (list-index (record-type-fields rtd) field-name)))
(if (not pos)
(error 'no-such-field field-name))
- (eval `(lambda (obj val)
- (and (eq? ',rtd (record-type-descriptor obj))
- (struct-set! obj ,pos val))))))
-
+ (lambda (obj val)
+ (if (eq? (struct-vtable obj) rtd)
+ (struct-set! obj pos val)
+ (%record-type-error rtd obj)))))
(define (record? obj)
(and (struct? obj) (record-type? (struct-vtable obj))))
(provide 'record)
\f
+
;;; {Booleans}
;;;
(define (->bool x) (not (not x)))
\f
+
;;; {Symbols}
;;;
(define (symbol-append . args)
- (string->symbol (apply string-append args)))
+ (string->symbol (apply string-append (map symbol->string args))))
(define (list->symbol . args)
(string->symbol (apply list->string args)))
(define (symbol . args)
(string->symbol (apply string args)))
-(define (obarray-symbol-append ob . args)
- (string->obarray-symbol (apply string-append ob args)))
-
-(define (obarray-gensym obarray . opt)
- (if (null? opt)
- (gensym "%%gensym" obarray)
- (gensym (car opt) obarray)))
-
\f
+
;;; {Lists}
;;;
n
(loop (+ n 1) (cdr l))))))
-(define (make-list n . init)
- (if (pair? init) (set! init (car init)))
- (let loop ((answer '())
- (n n))
- (if (<= n 0)
- answer
- (loop (cons init answer) (- n 1)))))
-
-
\f
-;;; {Multiple return values}
-
-(define *values-rtd*
- (make-record-type "values"
- '(values)))
-
-(define values
- (let ((make-values (record-constructor *values-rtd*)))
- (lambda x
- (if (and (not (null? x))
- (null? (cdr x)))
- (car x)
- (make-values x)))))
-
-(define call-with-values
- (let ((access-values (record-accessor *values-rtd* 'values))
- (values-predicate? (record-predicate *values-rtd*)))
- (lambda (producer consumer)
- (let ((result (producer)))
- (if (values-predicate? result)
- (apply consumer (access-values result))
- (consumer result))))))
-
-(provide 'values)
-\f
;;; {and-map and or-map}
;;;
;;; (and-map fn lst) is like (and (fn (car lst)) (fn (cadr lst)) (fn...) ...)
;;; (or-map fn lst) is like (or (fn (car lst)) (fn (cadr lst)) (fn...) ...)
-;;; (map-in-order fn lst) is like (map fn lst) but definately in order of lst.
;;;
;; and-map f l
;; Apply f to successive elements of l until exhaustion or f returns #f.
;; If returning early, return #f. Otherwise, return the last value returned
;; by f. If f has never been called because l is empty, return #t.
-;;
+;;
(define (and-map f lst)
(let loop ((result #t)
(l lst))
\f
(if (provided? 'posix)
- (primitive-load-path "ice-9/posix.scm"))
+ (primitive-load-path "ice-9/posix"))
(if (provided? 'socket)
- (primitive-load-path "ice-9/networking.scm"))
+ (primitive-load-path "ice-9/networking"))
+;; For reference, Emacs file-exists-p uses stat in this same way.
+;; ENHANCE-ME: Catching an exception from stat is a bit wasteful, do this in
+;; C where all that's needed is to inspect the return from stat().
(define file-exists?
(if (provided? 'posix)
(lambda (str)
- (access? str F_OK))
+ (->bool (false-if-exception (stat str))))
(lambda (str)
(let ((port (catch 'system-error (lambda () (open-file str OPEN_READ))
(lambda args #f))))
#f)))))
(define (has-suffix? str suffix)
- (let ((sufl (string-length suffix))
- (sl (string-length str)))
- (and (> sl sufl)
- (string=? (substring str (- sl sufl) sl) suffix))))
+ (string-suffix? suffix str))
+
+(define (system-error-errno args)
+ (if (eq? (car args) 'system-error)
+ (car (list-ref args 4))
+ #f))
\f
+
;;; {Error Handling}
;;;
(define (tms:cutime obj) (vector-ref obj 3))
(define (tms:cstime obj) (vector-ref obj 4))
-(define (file-position . args) (apply ftell args))
-(define (file-set-position . args) (apply fseek args))
+(define file-position ftell)
+(define (file-set-position port offset . whence)
+ (let ((whence (if (eq? whence '()) SEEK_SET (car whence))))
+ (seek port offset whence)))
(define (move->fdes fd/port fd)
(cond ((integer? fd/port)
(if (pair? maybe-fd)
(set-port-revealed! port 1))
port))
-
+
(define (dup->inport port/fd . maybe-fd)
(apply dup->port port/fd "r" maybe-fd))
(putenv (string-append name "=" value))
(putenv name)))
+(define (unsetenv name)
+ "Remove the entry for NAME from the environment."
+ (putenv name))
+
\f
+
;;; {Load Paths}
;;;
file)))
\f
+
;;; {Help for scm_shell}
+;;;
;;; The argument-processing code used by Guile-based shells generates
;;; Scheme code based on the argument list. This page contains help
;;; functions for the code it generates.
+;;;
(define (command-line) (program-arguments))
;; This is mostly for the internal use of the code generated by
;; scm_compile_shell_switches.
+
+(define (turn-on-debugging)
+ (debug-enable 'debug)
+ (debug-enable 'backtrace)
+ (read-enable 'positions))
+
(define (load-user-init)
(let* ((home (or (getenv "HOME")
(false-if-exception (passwd:dir (getpwuid (getuid))))
(primitive-load init-file))))
\f
+
+;;; {The interpreter stack}
+;;;
+
+(defmacro start-stack (tag exp)
+ `(%start-stack ,tag (lambda () ,exp)))
+
+\f
+
;;; {Loading by paths}
+;;;
;;; Load a Scheme source file named NAME, searching for it in the
;;; directories listed in %load-path, and applying each of the file
\f
+
;;; {Transcendental Functions}
;;;
;;; Derived from "Transcen.scm", Complex trancendental functions for SCM.
;;; See the file `COPYING' for terms applying to this program.
;;;
-(define (exp z)
- (if (real? z) ($exp z)
- (make-polar ($exp (real-part z)) (imag-part z))))
-
-(define (log z)
- (if (and (real? z) (>= z 0))
- ($log z)
- (make-rectangular ($log (magnitude z)) (angle z))))
-
-(define (sqrt z)
- (if (real? z)
- (if (negative? z) (make-rectangular 0 ($sqrt (- z)))
- ($sqrt z))
- (make-polar ($sqrt (magnitude z)) (/ (angle z) 2))))
-
(define expt
(let ((integer-expt integer-expt))
(lambda (z1 z2)
- (cond ((exact? z2)
+ (cond ((and (exact? z2) (integer? z2))
(integer-expt z1 z2))
((and (real? z2) (real? z1) (>= z1 0))
($expt z1 z2))
(/ (log (/ (- +i z) (+ +i z))) +2i))
($atan2 z (car y))))
-(define (log10 arg)
- (/ (log arg) (log 10)))
-
\f
;;; {Reader Extensions}
;;;
-
;;; Reader code for various "#c" forms.
;;;
(read-hash-extend #\' (lambda (c port)
(read port)))
-(read-hash-extend #\. (lambda (c port)
- (eval (read port))))
+
+(define read-eval? (make-fluid))
+(fluid-set! read-eval? #f)
+(read-hash-extend #\.
+ (lambda (c port)
+ (if (fluid-ref read-eval?)
+ (eval (read port) (interaction-environment))
+ (error
+ "#. read expansion found and read-eval? is #f."))))
\f
+
;;; {Command Line Options}
;;;
(left-part (string-append
(with-output-to-string
(lambda ()
- (map (lambda (x) (display (keyword-symbol x)) (display " "))
+ (map (lambda (x) (display (keyword->symbol x)) (display " "))
opts-proper)))
arg-name))
(middle-part (if (and (< (string-length left-part) 30)
(display help)
(newline))))
kw-desc))
-
-
+
+
(define (transform-usage-lambda cases)
(let* ((raw-usage (delq! 'else (map car cases)))
(usage-sans-specials (map (lambda (x)
;;;
;;; These are the low level data structures for modules.
;;;
+;;; Every module object is of the type 'module-type', which is a record
+;;; consisting of the following members:
+;;;
+;;; - eval-closure: the function that defines for its module the strategy that
+;;; shall be followed when looking up symbols in the module.
+;;;
+;;; An eval-closure is a function taking two arguments: the symbol to be
+;;; looked up and a boolean value telling whether a binding for the symbol
+;;; should be created if it does not exist yet. If the symbol lookup
+;;; succeeded (either because an existing binding was found or because a new
+;;; binding was created), a variable object representing the binding is
+;;; returned. Otherwise, the value #f is returned. Note that the eval
+;;; closure does not take the module to be searched as an argument: During
+;;; construction of the eval-closure, the eval-closure has to store the
+;;; module it belongs to in its environment. This means, that any
+;;; eval-closure can belong to only one module.
+;;;
+;;; The eval-closure of a module can be defined arbitrarily. However, three
+;;; special cases of eval-closures are to be distinguished: During startup
+;;; the module system is not yet activated. In this phase, no modules are
+;;; defined and all bindings are automatically stored by the system in the
+;;; pre-modules-obarray. Since no eval-closures exist at this time, the
+;;; functions which require an eval-closure as their argument need to be
+;;; passed the value #f.
+;;;
+;;; The other two special cases of eval-closures are the
+;;; standard-eval-closure and the standard-interface-eval-closure. Both
+;;; behave equally for the case that no new binding is to be created. The
+;;; difference between the two comes in, when the boolean argument to the
+;;; eval-closure indicates that a new binding shall be created if it is not
+;;; found.
+;;;
+;;; Given that no new binding shall be created, both standard eval-closures
+;;; define the following standard strategy of searching bindings in the
+;;; module: First, the module's obarray is searched for the symbol. Second,
+;;; if no binding for the symbol was found in the module's obarray, the
+;;; module's binder procedure is exececuted. If this procedure did not
+;;; return a binding for the symbol, the modules referenced in the module's
+;;; uses list are recursively searched for a binding of the symbol. If the
+;;; binding can not be found in these modules also, the symbol lookup has
+;;; failed.
+;;;
+;;; If a new binding shall be created, the standard-interface-eval-closure
+;;; immediately returns indicating failure. That is, it does not even try
+;;; to look up the symbol. In contrast, the standard-eval-closure would
+;;; first search the obarray, and if no binding was found there, would
+;;; create a new binding in the obarray, therefore not calling the binder
+;;; procedure or searching the modules in the uses list.
+;;;
+;;; The explanation of the following members obarray, binder and uses
+;;; assumes that the symbol lookup follows the strategy that is defined in
+;;; the standard-eval-closure and the standard-interface-eval-closure.
+;;;
+;;; - obarray: a hash table that maps symbols to variable objects. In this
+;;; hash table, the definitions are found that are local to the module (that
+;;; is, not imported from other modules). When looking up bindings in the
+;;; module, this hash table is searched first.
+;;;
+;;; - binder: either #f or a function taking a module and a symbol argument.
+;;; If it is a function it is called after the obarray has been
+;;; unsuccessfully searched for a binding. It then can provide bindings
+;;; that would otherwise not be found locally in the module.
+;;;
+;;; - uses: a list of modules from which non-local bindings can be inherited.
+;;; These modules are the third place queried for bindings after the obarray
+;;; has been unsuccessfully searched and the binder function did not deliver
+;;; a result either.
+;;;
+;;; - transformer: either #f or a function taking a scheme expression as
+;;; delivered by read. If it is a function, it will be called to perform
+;;; syntax transformations (e. g. makro expansion) on the given scheme
+;;; expression. The output of the transformer function will then be passed
+;;; to Guile's internal memoizer. This means that the output must be valid
+;;; scheme code. The only exception is, that the output may make use of the
+;;; syntax extensions provided to identify the modules that a binding
+;;; belongs to.
+;;;
+;;; - name: the name of the module. This is used for all kinds of printing
+;;; outputs. In certain places the module name also serves as a way of
+;;; identification. When adding a module to the uses list of another
+;;; module, it is made sure that the new uses list will not contain two
+;;; modules of the same name.
+;;;
+;;; - kind: classification of the kind of module. The value is (currently?)
+;;; only used for printing. It has no influence on how a module is treated.
+;;; Currently the following values are used when setting the module kind:
+;;; 'module, 'directory, 'interface, 'custom-interface. If no explicit kind
+;;; is set, it defaults to 'module.
+;;;
+;;; - duplicates-handlers: a list of procedures that get called to make a
+;;; choice between two duplicate bindings when name clashes occur. See the
+;;; `duplicate-handlers' global variable below.
+;;;
+;;; - observers: a list of procedures that get called when the module is
+;;; modified.
+;;;
+;;; - weak-observers: a weak-key hash table of procedures that get called
+;;; when the module is modified. See `module-observe-weak' for details.
+;;;
+;;; In addition, the module may (must?) contain a binding for
+;;; `%module-public-interface'. This variable should be bound to a module
+;;; representing the exported interface of a module. See the
+;;; `module-public-interface' and `module-export!' procedures.
+;;;
;;; !!! warning: The interface to lazy binder procedures is going
;;; to be changed in an incompatible way to permit all the basic
;;; module ops to be virtualized.
;;;
\f
+
;;; {Printing Modules}
+;;;
+
;; This is how modules are printed. You can re-define it.
;; (Redefining is actually more complicated than simply redefining
;; %print-module because that would only change the binding and not
;; is a (CLOSURE module symbol) which, as a last resort, can provide
;; bindings that would otherwise not be found locally in the module.
;;
+;; NOTE: If you change anything here, you also need to change
+;; libguile/modules.h.
+;;
(define module-type
(make-record-type 'module
'(obarray uses binder eval-closure transformer name kind
- observers weak-observers observer-id)
+ duplicates-handlers import-obarray
+ observers weak-observers)
%print-module))
;; make-module &opt size uses binder
(list-ref args index)
default))
+ (define %default-import-size
+ ;; Typical number of imported bindings actually used by a module.
+ 600)
+
(if (> (length args) 3)
(error "Too many args to make-module." args))
- (let ((size (parse-arg 0 1021))
+ (let ((size (parse-arg 0 31))
(uses (parse-arg 1 '()))
(binder (parse-arg 2 #f)))
(error
"Lazy-binder expected to be a procedure or #f." binder))
- (let ((module (module-constructor (make-vector size '())
- uses binder #f #f #f #f
+ (let ((module (module-constructor (make-hash-table size)
+ uses binder #f #f #f #f #f
+ (make-hash-table %default-import-size)
'()
- (make-weak-value-hash-table 31)
- 0)))
+ (make-weak-key-hash-table 31))))
;; We can't pass this as an argument to module-constructor,
;; because we need it to close over a pointer to the module
(define set-module-name! (record-modifier module-type 'name))
(define module-kind (record-accessor module-type 'kind))
(define set-module-kind! (record-modifier module-type 'kind))
+(define module-duplicates-handlers
+ (record-accessor module-type 'duplicates-handlers))
+(define set-module-duplicates-handlers!
+ (record-modifier module-type 'duplicates-handlers))
(define module-observers (record-accessor module-type 'observers))
(define set-module-observers! (record-modifier module-type 'observers))
(define module-weak-observers (record-accessor module-type 'weak-observers))
-(define module-observer-id (record-accessor module-type 'observer-id))
-(define set-module-observer-id! (record-modifier module-type 'observer-id))
(define module? (record-predicate module-type))
+(define module-import-obarray (record-accessor module-type 'import-obarray))
+
(define set-module-eval-closure!
(let ((setter (record-modifier module-type 'eval-closure)))
(lambda (module closure)
;; to maximally one module.
(set-procedure-property! closure 'module module))))
-(define (eval-in-module exp module)
- (eval2 exp (module-eval-closure module)))
-
\f
+
;;; {Observer protocol}
;;;
(set-module-observers! module (cons proc (module-observers module)))
(cons module proc))
-(define (module-observe-weak module proc)
- (let ((id (module-observer-id module)))
- (hash-set! (module-weak-observers module) id proc)
- (set-module-observer-id! module (+ 1 id))
- (cons module id)))
+(define (module-observe-weak module observer-id . proc)
+ ;; Register PROC as an observer of MODULE under name OBSERVER-ID (which can
+ ;; be any Scheme object). PROC is invoked and passed MODULE any time
+ ;; MODULE is modified. PROC gets unregistered when OBSERVER-ID gets GC'd
+ ;; (thus, it is never unregistered if OBSERVER-ID is an immediate value,
+ ;; for instance).
+
+ ;; The two-argument version is kept for backward compatibility: when called
+ ;; with two arguments, the observer gets unregistered when closure PROC
+ ;; gets GC'd (making it impossible to use an anonymous lambda for PROC).
+
+ (let ((proc (if (null? proc) observer-id (car proc))))
+ (hashq-set! (module-weak-observers module) observer-id proc)))
(define (module-unobserve token)
(let ((module (car token))
(set-module-observers! module (delq1! id (module-observers module)))))
*unspecified*)
+(define module-defer-observers #f)
+(define module-defer-observers-mutex (make-mutex))
+(define module-defer-observers-table (make-hash-table))
+
(define (module-modified m)
+ (if module-defer-observers
+ (hash-set! module-defer-observers-table m #t)
+ (module-call-observers m)))
+
+;;; This function can be used to delay calls to observers so that they
+;;; can be called once only in the face of massive updating of modules.
+;;;
+(define (call-with-deferred-observers thunk)
+ (dynamic-wind
+ (lambda ()
+ (lock-mutex module-defer-observers-mutex)
+ (set! module-defer-observers #t))
+ thunk
+ (lambda ()
+ (set! module-defer-observers #f)
+ (hash-for-each (lambda (m dummy)
+ (module-call-observers m))
+ module-defer-observers-table)
+ (hash-clear! module-defer-observers-table)
+ (unlock-mutex module-defer-observers-mutex))))
+
+(define (module-call-observers m)
(for-each (lambda (proc) (proc m)) (module-observers m))
- (hash-fold (lambda (id proc res) (proc m)) #f (module-weak-observers m)))
+
+ ;; We assume that weak observers don't (un)register themselves as they are
+ ;; called since this would preclude proper iteration over the hash table
+ ;; elements.
+ (hash-for-each (lambda (id proc) (proc m)) (module-weak-observers m)))
\f
+
;;; {Module Searching in General}
;;;
;;; We sometimes want to look for properties of a symbol
;;;
;; module-search fn m
-;;
+;;
;; return the first non-#f result of FN applied to M and then to
;; the modules in the uses of m, and so on recursively. If all applications
;; return #f, then so does this function.
;;; {Is a symbol interned in a module?}
;;;
-;;; Symbol S in Module M is interned if S occurs in
+;;; Symbol S in Module M is interned if S occurs in
;;; of S in M has been set to some well-defined value.
;;;
;;; It is possible to intern a symbol in a module without providing
((if (symbol? key) hashq-remove! hash-remove!) ob key))
;; module-symbol-locally-interned? module symbol
-;;
+;;
;; is a symbol interned (not neccessarily defined) locally in a given module
;; or its uses? Interned symbols shadow inherited bindings even if
;; they are not themselves bound to a defined value.
(not (not (module-obarray-get-handle (module-obarray m) v))))
;; module-symbol-interned? module symbol
-;;
+;;
;; is a symbol interned (not neccessarily defined) anywhere in a given module
;; or its uses? Interned symbols shadow inherited bindings even if
;; they are not themselves bound to a defined value.
;;;
;;; If the symbol is not found at all, return #f.
;;;
-(define (module-local-variable m v)
-; (caddr
-; (list m v
- (let ((b (module-obarray-ref (module-obarray m) v)))
- (or (and (variable? b) b)
- (and (module-binder m)
- ((module-binder m) m v #f)))))
-;))
-
-;; module-variable module symbol
-;;
-;; like module-local-variable, except search the uses in the
-;; case V is not found in M.
-;;
-;; NOTE: This function is superseded with C code (see modules.c)
-;;; when using the standard eval closure.
-;;
-(define (module-variable m v)
- (module-search module-local-variable m v))
-
+;;; (This is now written in C, see `modules.c'.)
+;;;
;;; {Mapping modules x symbols --> bindings}
;;;
;;;
;; module-symbol-binding module symbol opt-value
-;;
+;;
;; return the binding of a variable specified by name within
;; a given module, signalling an error if the variable is unbound.
;; If the OPT-VALUE is passed, then instead of signalling an error,
;;
(define (module-symbol-local-binding m v . opt-val)
(let ((var (module-local-variable m v)))
- (if var
+ (if (and var (variable-bound? var))
(variable-ref var)
(if (not (null? opt-val))
(car opt-val)
(error "Locally unbound variable." v)))))
;; module-symbol-binding module symbol opt-value
-;;
+;;
;; return the binding of a variable specified by name within
;; a given module, signalling an error if the variable is unbound.
;; If the OPT-VALUE is passed, then instead of signalling an error,
;;
(define (module-symbol-binding m v . opt-val)
(let ((var (module-variable m v)))
- (if var
+ (if (and var (variable-bound? var))
(variable-ref var)
(if (not (null? opt-val))
(car opt-val)
\f
+
;;; {Adding Variables to Modules}
;;;
-;;;
-
;; module-make-local-var! module symbol
-;;
+;;
;; ensure a variable for V in the local namespace of M.
;; If no variable was already there, then create a new and uninitialzied
;; variable.
;;
+;; This function is used in modules.c.
+;;
(define (module-make-local-var! m v)
(or (let ((b (module-obarray-ref (module-obarray m) v)))
(and (variable? b)
(begin
+ ;; Mark as modified since this function is called when
+ ;; the standard eval closure defines a binding
(module-modified m)
b)))
- (and (module-binder m)
- ((module-binder m) m v #t))
- (begin
- (let ((answer (make-undefined-variable v)))
- (module-obarray-set! (module-obarray m) v answer)
- (module-modified m)
- answer))))
+
+ ;; Create a new local variable.
+ (let ((local-var (make-undefined-variable)))
+ (module-add! m v local-var)
+ local-var)))
+
+;; module-ensure-local-variable! module symbol
+;;
+;; Ensure that there is a local variable in MODULE for SYMBOL. If
+;; there is no binding for SYMBOL, create a new uninitialized
+;; variable. Return the local variable.
+;;
+(define (module-ensure-local-variable! module symbol)
+ (or (module-local-variable module symbol)
+ (let ((var (make-undefined-variable)))
+ (module-add! module symbol var)
+ var)))
;; module-add! module symbol var
-;;
+;;
;; ensure a particular variable for V in the local namespace of M.
;;
(define (module-add! m v var)
(module-obarray-set! (module-obarray m) v var)
(module-modified m))
-;; module-remove!
-;;
+;; module-remove!
+;;
;; make sure that a symbol is undefined in the local namespace of M.
;;
(define (module-remove! m v)
- (module-obarray-remove! (module-obarray m) v)
+ (module-obarray-remove! (module-obarray m) v)
(module-modified m))
(define (module-clear! m)
- (vector-fill! (module-obarray m) '())
+ (hash-clear! (module-obarray m))
(module-modified m))
;; MODULE-FOR-EACH -- exported
-;;
+;;
;; Call PROC on each symbol in MODULE, with arguments of (SYMBOL VARIABLE).
;;
(define (module-for-each proc module)
- (let ((obarray (module-obarray module)))
- (do ((index 0 (+ index 1))
- (end (vector-length obarray)))
- ((= index end))
- (for-each
- (lambda (bucket)
- (proc (car bucket) (cdr bucket)))
- (vector-ref obarray index)))))
-
+ (hash-for-each proc (module-obarray module)))
(define (module-map proc module)
- (let* ((obarray (module-obarray module))
- (end (vector-length obarray)))
-
- (let loop ((i 0)
- (answer '()))
- (if (= i end)
- answer
- (loop (+ 1 i)
- (append!
- (map (lambda (bucket)
- (proc (car bucket) (cdr bucket)))
- (vector-ref obarray i))
- answer))))))
+ (hash-map->list proc (module-obarray module)))
+
\f
;;; {Low Level Bootstrapping}
;;;
-;; make-root-module
+;; make-root-module
-;; A root module uses the symhash table (the system's privileged
-;; obarray). Being inside a root module is like using SCM without
-;; any module system.
+;; A root module uses the pre-modules-obarray as its obarray. This
+;; special obarray accumulates all bindings that have been established
+;; before the module system is fully booted.
;;
-
-
-(define (root-module-closure m s define?)
- (let ((bi (and (symbol-interned? #f s)
- (builtin-variable s))))
- (and bi
- (or define? (variable-bound? bi))
- (begin
- (module-add! m s bi)
- bi))))
+;; (The obarray continues to be used by code that has been closed over
+;; before the module system has been booted.)
(define (make-root-module)
- (make-module 1019 '() root-module-closure))
+ (let ((m (make-module 0)))
+ (set-module-obarray! m (%get-pre-modules-obarray))
+ m))
+;; make-scm-module
-;; make-scm-module
-
-;; An scm module is a module into which the lazy binder copies
-;; variable bindings from the system symhash table. The mapping is
-;; one way only; newly introduced bindings in an scm module are not
-;; copied back into the system symhash table (and can be used to override
-;; bindings from the symhash table).
-;;
-
-(define (scm-module-closure m s define?)
- (let ((bi (and (symbol-interned? #f s)
- (builtin-variable s))))
- (and bi
- (variable-bound? bi)
- (begin
- (module-add! m s bi)
- bi))))
+;; The root interface is a module that uses the same obarray as the
+;; root module. It does not allow new definitions, tho.
(define (make-scm-module)
- (make-module 1019 '() scm-module-closure))
-
+ (let ((m (make-module 0)))
+ (set-module-obarray! m (%get-pre-modules-obarray))
+ (set-module-eval-closure! m (standard-interface-eval-closure m))
+ m))
-;; the-module
-;;
-;; NOTE: This binding is used in libguile/modules.c.
-;;
-(define the-module #f)
-
-;; scm:eval-transformer
-;;
-(define scm:eval-transformer #f)
-
-;; set-current-module module
-;;
-;; set the current module as viewed by the normalizer.
-;;
-;; NOTE: This binding is used in libguile/modules.c.
-;;
-(define (set-current-module m)
- (set! the-module m)
- (if m
- (begin
- (set! *top-level-lookup-closure* (module-eval-closure the-module))
- (set! scm:eval-transformer (module-transformer the-module)))
- (set! *top-level-lookup-closure* #f)))
-
-
-;; current-module
-;;
-;; return the current module as viewed by the normalizer.
-;;
-(define (current-module) the-module)
\f
+
;;; {Module-based Loading}
;;;
(define basic-load load)
-(define (load-module filename)
+(define (load-module filename . reader)
(save-module-excursion
(lambda ()
(let ((oldname (and (current-load-port)
(port-filename (current-load-port)))))
- (basic-load (if (and oldname
- (> (string-length filename) 0)
- (not (char=? (string-ref filename 0) #\/))
- (not (string=? (dirname oldname) ".")))
- (string-append (dirname oldname) "/" filename)
- filename))))))
+ (apply basic-load
+ (if (and oldname
+ (> (string-length filename) 0)
+ (not (char=? (string-ref filename 0) #\/))
+ (not (string=? (dirname oldname) ".")))
+ (string-append (dirname oldname) "/" filename)
+ filename)
+ reader)))))
\f
+
;;; {MODULE-REF -- exported}
-;;
+;;;
+
;; Returns the value of a variable called NAME in MODULE or any of its
;; used modules. If there is no such variable, then if the optional third
;; argument DEFAULT is present, it is returned; otherwise an error is signaled.
-;;
+;;
(define (module-ref module name . rest)
(let ((variable (module-variable module name)))
(if (and variable (variable-bound? variable))
;;
;; Sets the variable called NAME in MODULE (or in a module that MODULE uses)
;; to VALUE; if there is no such variable, an error is signaled.
-;;
+;;
(define (module-set! module name value)
(let ((variable (module-variable module name)))
(if variable
;;
;; Sets the variable called NAME in MODULE to VALUE; if there is no such
;; variable, it is added first.
-;;
+;;
(define (module-define! module name value)
(let ((variable (module-local-variable module name)))
(if variable
(begin
(variable-set! variable value)
(module-modified module))
- (module-add! module name (make-variable value name)))))
+ (let ((variable (make-variable value)))
+ (module-add! module name variable)))))
;; MODULE-DEFINED? -- exported
;;
;; MODULE-USE! module interface
;;
;; Add INTERFACE to the list of interfaces used by MODULE.
-;;
+;;
(define (module-use! module interface)
+ (if (not (eq? module interface))
+ (begin
+ ;; Newly used modules must be appended rather than consed, so that
+ ;; `module-variable' traverses the use list starting from the first
+ ;; used module.
+ (set-module-uses! module
+ (append (filter (lambda (m)
+ (not
+ (equal? (module-name m)
+ (module-name interface))))
+ (module-uses module))
+ (list interface)))
+
+ (module-modified module))))
+
+;; MODULE-USE-INTERFACES! module interfaces
+;;
+;; Same as MODULE-USE! but add multiple interfaces and check for duplicates
+;;
+(define (module-use-interfaces! module interfaces)
(set-module-uses! module
- (cons interface (delq! interface (module-uses module))))
+ (append (module-uses module) interfaces))
(module-modified module))
\f
+
;;; {Recursive Namespaces}
;;;
-;;;
;;; A hierarchical namespace emerges if we consider some module to be
;;; root, and variables bound to modules as nested namespaces.
;;;
;;; modules.
;;;
;;; (nested-ref some-root-module '(foo bar baz))
-;;; => <value of a variable named baz in the module bound to bar in
+;;; => <value of a variable named baz in the module bound to bar in
;;; the module bound to foo in some-root-module>
;;;
;;;
\f
-;;; {The (app) module}
+
+;;; {The (%app) module}
;;;
;;; The root of conventionally named objects not directly in the top level.
;;;
-;;; (app modules)
-;;; (app modules guile)
+;;; (%app modules)
+;;; (%app modules guile)
;;;
;;; The directory of all modules and the standard root module.
;;;
-(define (module-public-interface m)
- (module-ref m '%module-public-interface #f))
+;; module-public-interface is defined in C.
(define (set-module-public-interface! m i)
(module-define! m '%module-public-interface i))
(define (set-system-module! m s)
(define the-root-module (make-root-module))
(define the-scm-module (make-scm-module))
(set-module-public-interface! the-root-module the-scm-module)
-(set-module-name! the-root-module 'the-root-module)
-(set-module-name! the-scm-module 'the-scm-module)
+(set-module-name! the-root-module '(guile))
+(set-module-name! the-scm-module '(guile))
+(set-module-kind! the-scm-module 'interface)
(for-each set-system-module! (list the-root-module the-scm-module) '(#t #t))
-(set-current-module the-root-module)
-
-(define app (make-module 31))
-(local-define '(app modules) (make-module 31))
-(local-define '(app modules guile) the-root-module)
-
-;; (define-special-value '(app modules new-ws) (lambda () (make-scm-module)))
-
-(define (try-load-module name)
- (or (try-module-linked name)
- (try-module-autoload name)
- (try-module-dynamic-link name)))
-
;; NOTE: This binding is used in libguile/modules.c.
;;
-(define (resolve-module name . maybe-autoload)
- (let ((full-name (append '(app modules) name)))
- (let ((already (local-ref full-name)))
- (if already
- ;; The module already exists...
- (if (and (or (null? maybe-autoload) (car maybe-autoload))
- (not (module-ref already '%module-public-interface #f)))
- ;; ...but we are told to load and it doesn't contain source, so
- (begin
- (try-load-module name)
- already)
- ;; simply return it.
- already)
- (begin
- ;; Try to autoload it if we are told so
- (if (or (null? maybe-autoload) (car maybe-autoload))
- (try-load-module name))
- ;; Get/create it.
- (make-modules-in (current-module) full-name))))))
-
+(define (make-modules-in module name)
+ (if (null? name)
+ module
+ (make-modules-in
+ (let* ((var (module-local-variable module (car name)))
+ (val (and var (variable-bound? var) (variable-ref var))))
+ (if (module? val)
+ val
+ (let ((m (make-module 31)))
+ (set-module-kind! m 'directory)
+ (set-module-name! m (append (or (module-name module) '())
+ (list (car name))))
+ (module-define! module (car name) m)
+ m)))
+ (cdr name))))
+
(define (beautify-user-module! module)
(let ((interface (module-public-interface module)))
(if (or (not interface)
(set-module-public-interface! module interface))))
(if (and (not (memq the-scm-module (module-uses module)))
(not (eq? module the-root-module)))
- (set-module-uses! module (append (module-uses module) (list the-scm-module)))))
+ ;; Import the default set of bindings (from the SCM module) in MODULE.
+ (module-use! module the-scm-module)))
;; NOTE: This binding is used in libguile/modules.c.
;;
-(define (make-modules-in module name)
- (if (null? name)
- module
- (cond
- ((module-ref module (car name) #f)
- => (lambda (m) (make-modules-in m (cdr name))))
- (else (let ((m (make-module 31)))
- (set-module-kind! m 'directory)
- (set-module-name! m (car name))
- (module-define! module (car name) m)
- (make-modules-in m (cdr name)))))))
+(define resolve-module
+ (let ((the-root-module the-root-module))
+ (lambda (name . maybe-autoload)
+ (if (equal? name '(guile))
+ the-root-module
+ (let ((full-name (append '(%app modules) name)))
+ (let ((already (nested-ref the-root-module full-name))
+ (autoload (or (null? maybe-autoload) (car maybe-autoload))))
+ (cond
+ ((and already (module? already)
+ (or (not autoload) (module-public-interface already)))
+ ;; A hit, a palpable hit.
+ already)
+ (autoload
+ ;; Try to autoload the module, and recurse.
+ (try-load-module name)
+ (resolve-module name #f))
+ (else
+ ;; A module is not bound (but maybe something else is),
+ ;; we're not autoloading -- here's the weird semantics,
+ ;; we create an empty module.
+ (make-modules-in the-root-module full-name)))))))))
+
+;; Cheat. These bindings are needed by modules.c, but we don't want
+;; to move their real definition here because that would be unnatural.
+;;
+(define try-module-autoload #f)
+(define process-define-module #f)
+(define process-use-modules #f)
+(define module-export! #f)
+(define default-duplicate-binding-procedures #f)
+
+(define %app (make-module 31))
+(define app %app) ;; for backwards compatability
+
+(local-define '(%app modules) (make-module 31))
+(local-define '(%app modules guile) the-root-module)
+
+;; This boots the module system. All bindings needed by modules.c
+;; must have been defined by now.
+;;
+(set-current-module the-root-module)
-(define (resolve-interface name)
- (let ((module (resolve-module name)))
- (and module (module-public-interface module))))
+;; (define-special-value '(%app modules new-ws) (lambda () (make-scm-module)))
+(define (try-load-module name)
+ (or (begin-deprecated (try-module-linked name))
+ (try-module-autoload name)
+ (begin-deprecated (try-module-dynamic-link name))))
-(define %autoloader-developer-mode #t)
+(define (purify-module! module)
+ "Removes bindings in MODULE which are inherited from the (guile) module."
+ (let ((use-list (module-uses module)))
+ (if (and (pair? use-list)
+ (eq? (car (last-pair use-list)) the-scm-module))
+ (set-module-uses! module (reverse (cdr (reverse use-list)))))))
+
+;; Return a module that is an interface to the module designated by
+;; NAME.
+;;
+;; `resolve-interface' takes four keyword arguments:
+;;
+;; #:select SELECTION
+;;
+;; SELECTION is a list of binding-specs to be imported; A binding-spec
+;; is either a symbol or a pair of symbols (ORIG . SEEN), where ORIG
+;; is the name in the used module and SEEN is the name in the using
+;; module. Note that SEEN is also passed through RENAMER, below. The
+;; default is to select all bindings. If you specify no selection but
+;; a renamer, only the bindings that already exist in the used module
+;; are made available in the interface. Bindings that are added later
+;; are not picked up.
+;;
+;; #:hide BINDINGS
+;;
+;; BINDINGS is a list of bindings which should not be imported.
+;;
+;; #:prefix PREFIX
+;;
+;; PREFIX is a symbol that will be appended to each exported name.
+;; The default is to not perform any renaming.
+;;
+;; #:renamer RENAMER
+;;
+;; RENAMER is a procedure that takes a symbol and returns its new
+;; name. The default is not perform any renaming.
+;;
+;; Signal "no code for module" error if module name is not resolvable
+;; or its public interface is not available. Signal "no binding"
+;; error if selected binding does not exist in the used module.
+;;
+(define (resolve-interface name . args)
+
+ (define (get-keyword-arg args kw def)
+ (cond ((memq kw args)
+ => (lambda (kw-arg)
+ (if (null? (cdr kw-arg))
+ (error "keyword without value: " kw))
+ (cadr kw-arg)))
+ (else
+ def)))
+
+ (let* ((select (get-keyword-arg args #:select #f))
+ (hide (get-keyword-arg args #:hide '()))
+ (renamer (or (get-keyword-arg args #:renamer #f)
+ (let ((prefix (get-keyword-arg args #:prefix #f)))
+ (and prefix (symbol-prefix-proc prefix)))
+ identity))
+ (module (resolve-module name))
+ (public-i (and module (module-public-interface module))))
+ (and (or (not module) (not public-i))
+ (error "no code for module" name))
+ (if (and (not select) (null? hide) (eq? renamer identity))
+ public-i
+ (let ((selection (or select (module-map (lambda (sym var) sym)
+ public-i)))
+ (custom-i (make-module 31)))
+ (set-module-kind! custom-i 'custom-interface)
+ (set-module-name! custom-i name)
+ ;; XXX - should use a lazy binder so that changes to the
+ ;; used module are picked up automatically.
+ (for-each (lambda (bspec)
+ (let* ((direct? (symbol? bspec))
+ (orig (if direct? bspec (car bspec)))
+ (seen (if direct? bspec (cdr bspec)))
+ (var (or (module-local-variable public-i orig)
+ (module-local-variable module orig)
+ (error
+ ;; fixme: format manually for now
+ (simple-format
+ #f "no binding `~A' in module ~A"
+ orig name)))))
+ (if (memq orig hide)
+ (set! hide (delq! orig hide))
+ (module-add! custom-i
+ (renamer seen)
+ var))))
+ selection)
+ ;; Check that we are not hiding bindings which don't exist
+ (for-each (lambda (binding)
+ (if (not (module-local-variable public-i binding))
+ (error
+ (simple-format
+ #f "no binding `~A' to hide in module ~A"
+ binding name))))
+ hide)
+ custom-i))))
+
+(define (symbol-prefix-proc prefix)
+ (lambda (symbol)
+ (symbol-append prefix symbol)))
+
+;; This function is called from "modules.c". If you change it, be
+;; sure to update "modules.c" as well.
(define (process-define-module args)
- (let* ((module-id (car args))
- (module (resolve-module module-id #f))
- (kws (cdr args)))
+ (let* ((module-id (car args))
+ (module (resolve-module module-id #f))
+ (kws (cdr args))
+ (unrecognized (lambda (arg)
+ (error "unrecognized define-module argument" arg))))
(beautify-user-module! module)
(let loop ((kws kws)
- (reversed-interfaces '()))
+ (reversed-interfaces '())
+ (exports '())
+ (re-exports '())
+ (replacements '())
+ (autoloads '()))
+
(if (null? kws)
- (for-each (lambda (interface)
- (module-use! module interface))
- reversed-interfaces)
- (let ((keyword (cond ((keyword? (car kws))
- (keyword->symbol (car kws)))
- ((and (symbol? (car kws))
- (eq? (string-ref (car kws) 0) #\:))
- (string->symbol (substring (car kws) 1)))
- (else #f))))
- (case keyword
- ((use-module use-syntax)
- (if (not (pair? (cdr kws)))
- (error "unrecognized defmodule argument" kws))
- (let* ((used-name (cadr kws))
- (used-module (resolve-module used-name)))
- (if (not (module-ref used-module
- '%module-public-interface
- #f))
- (begin
- ((if %autoloader-developer-mode warn error)
- "no code for module" (module-name used-module))
- (beautify-user-module! used-module)))
- (let ((interface (module-public-interface used-module)))
- (if (not interface)
- (error "missing interface for use-module"
- used-module))
- (if (eq? keyword 'use-syntax)
- (set-module-transformer!
- module
- (module-ref interface (car (last-pair used-name))
- #f)))
- (loop (cddr kws)
- (cons interface reversed-interfaces)))))
- ((autoload)
- (if (not (and (pair? (cdr kws)) (pair? (cddr kws))))
- (error "unrecognized defmodule argument" kws))
- (loop (cdddr kws)
- (cons (make-autoload-interface module
- (cadr kws)
- (caddr kws))
- reversed-interfaces)))
- ((no-backtrace)
- (set-system-module! module #t)
- (loop (cdr kws) reversed-interfaces))
- (else
- (error "unrecognized defmodule argument" kws))))))
+ (call-with-deferred-observers
+ (lambda ()
+ (module-use-interfaces! module (reverse reversed-interfaces))
+ (module-export! module exports)
+ (module-replace! module replacements)
+ (module-re-export! module re-exports)
+ (if (not (null? autoloads))
+ (apply module-autoload! module autoloads))))
+ (case (car kws)
+ ((#:use-module #:use-syntax)
+ (or (pair? (cdr kws))
+ (unrecognized kws))
+ (let* ((interface-args (cadr kws))
+ (interface (apply resolve-interface interface-args)))
+ (and (eq? (car kws) #:use-syntax)
+ (or (symbol? (caar interface-args))
+ (error "invalid module name for use-syntax"
+ (car interface-args)))
+ (set-module-transformer!
+ module
+ (module-ref interface
+ (car (last-pair (car interface-args)))
+ #f)))
+ (loop (cddr kws)
+ (cons interface reversed-interfaces)
+ exports
+ re-exports
+ replacements
+ autoloads)))
+ ((#:autoload)
+ (or (and (pair? (cdr kws)) (pair? (cddr kws)))
+ (unrecognized kws))
+ (loop (cdddr kws)
+ reversed-interfaces
+ exports
+ re-exports
+ replacements
+ (let ((name (cadr kws))
+ (bindings (caddr kws)))
+ (cons* name bindings autoloads))))
+ ((#:no-backtrace)
+ (set-system-module! module #t)
+ (loop (cdr kws) reversed-interfaces exports re-exports
+ replacements autoloads))
+ ((#:pure)
+ (purify-module! module)
+ (loop (cdr kws) reversed-interfaces exports re-exports
+ replacements autoloads))
+ ((#:duplicates)
+ (if (not (pair? (cdr kws)))
+ (unrecognized kws))
+ (set-module-duplicates-handlers!
+ module
+ (lookup-duplicates-handlers (cadr kws)))
+ (loop (cddr kws) reversed-interfaces exports re-exports
+ replacements autoloads))
+ ((#:export #:export-syntax)
+ (or (pair? (cdr kws))
+ (unrecognized kws))
+ (loop (cddr kws)
+ reversed-interfaces
+ (append (cadr kws) exports)
+ re-exports
+ replacements
+ autoloads))
+ ((#:re-export #:re-export-syntax)
+ (or (pair? (cdr kws))
+ (unrecognized kws))
+ (loop (cddr kws)
+ reversed-interfaces
+ exports
+ (append (cadr kws) re-exports)
+ replacements
+ autoloads))
+ ((#:replace #:replace-syntax)
+ (or (pair? (cdr kws))
+ (unrecognized kws))
+ (loop (cddr kws)
+ reversed-interfaces
+ exports
+ re-exports
+ (append (cadr kws) replacements)
+ autoloads))
+ (else
+ (unrecognized kws)))))
+ (run-hook module-defined-hook module)
module))
+;; `module-defined-hook' is a hook that is run whenever a new module
+;; is defined. Its members are called with one argument, the new
+;; module.
+(define module-defined-hook (make-hook 1))
+
+\f
+
;;; {Autoload}
+;;;
(define (make-autoload-interface module name bindings)
(let ((b (lambda (a sym definep)
(let ((i (module-public-interface (resolve-module name))))
(if (not i)
(error "missing interface for module" name))
- ;; Replace autoload-interface with interface
- (set-car! (memq a (module-uses module)) i)
+ (let ((autoload (memq a (module-uses module))))
+ ;; Replace autoload-interface with actual interface if
+ ;; that has not happened yet.
+ (if (pair? autoload)
+ (set-car! autoload i)))
(module-local-variable i sym))))))
- (module-constructor #() #f b #f #f name 'autoload
- '() (make-weak-value-hash-table 31) 0)))
+ (module-constructor (make-hash-table 0) '() b #f #f name 'autoload #f
+ (make-hash-table 0) '() (make-weak-value-hash-table 31))))
+
+(define (module-autoload! module . args)
+ "Have @var{module} automatically load the module named @var{name} when one
+of the symbols listed in @var{bindings} is looked up. @var{args} should be a
+list of module-name/binding-list pairs, e.g., as in @code{(module-autoload!
+module '(ice-9 q) '(make-q q-length))}."
+ (let loop ((args args))
+ (cond ((null? args)
+ #t)
+ ((null? (cdr args))
+ (error "invalid name+binding autoload list" args))
+ (else
+ (let ((name (car args))
+ (bindings (cadr args)))
+ (module-use! module (make-autoload-interface module
+ name bindings))
+ (loop (cddr args)))))))
+
+
+;;; {Compiled module}
+
+(if (not (defined? 'load-compiled))
+ (define load-compiled #f))
\f
+
;;; {Autoloading modules}
+;;;
(define autoloads-in-progress '())
+;; This function is called from "modules.c". If you change it, be
+;; sure to update "modules.c" as well.
+
(define (try-module-autoload module-name)
(let* ((reverse-name (reverse module-name))
- (name (car reverse-name))
+ (name (symbol->string (car reverse-name)))
(dir-hint-module-name (reverse (cdr reverse-name)))
- (dir-hint (apply symbol-append (map (lambda (elt) (symbol-append elt "/")) dir-hint-module-name))))
+ (dir-hint (apply string-append
+ (map (lambda (elt)
+ (string-append (symbol->string elt) "/"))
+ dir-hint-module-name))))
(resolve-module dir-hint-module-name #f)
(and (not (autoload-done-or-in-progress? dir-hint name))
(let ((didit #f))
+ (define (load-file proc file)
+ (save-module-excursion (lambda () (proc file)))
+ (set! didit #t))
(dynamic-wind
(lambda () (autoload-in-progress! dir-hint name))
(lambda ()
- (let ((full (%search-load-path (in-vicinity dir-hint name))))
- (if full
- (begin
- (save-module-excursion (lambda () (primitive-load full)))
- (set! didit #t)))))
+ (let ((file (in-vicinity dir-hint name)))
+ (let ((compiled (and load-compiled
+ (%search-load-path
+ (string-append file ".go"))))
+ (source (%search-load-path file)))
+ (cond ((and source
+ (or (not compiled)
+ (< (stat:mtime (stat compiled))
+ (stat:mtime (stat source)))))
+ (if compiled
+ (warn "source file" source "newer than" compiled))
+ (with-fluids ((current-reader #f))
+ (load-file primitive-load source)))
+ (compiled
+ (load-file load-compiled compiled))))))
(lambda () (set-autoloaded! dir-hint name didit)))
didit))))
\f
-;;; Dynamic linking of modules
-
-;; Initializing a module that is written in C is a two step process.
-;; First the module's `module init' function is called. This function
-;; is expected to call `scm_register_module_xxx' to register the `real
-;; init' function. Later, when the module is referenced for the first
-;; time, this real init function is called in the right context. See
-;; gtcltk-lib/gtcltk-module.c for an example.
-;;
-;; The code for the module can be in a regular shared library (so that
-;; the `module init' function will be called when libguile is
-;; initialized). Or it can be dynamically linked.
-;;
-;; You can safely call `scm_register_module_xxx' before libguile
-;; itself is initialized. You could call it from an C++ constructor
-;; of a static object, for example.
-;;
-;; To make your Guile extension into a dynamic linkable module, follow
-;; these easy steps:
-;;
-;; - Find a name for your module, like (ice-9 gtcltk)
-;; - Write a function with a name like
-;;
-;; scm_init_ice_9_gtcltk_module
-;;
-;; This is your `module init' function. It should call
-;;
-;; scm_register_module_xxx ("ice-9 gtcltk", scm_init_gtcltk);
-;;
-;; "ice-9 gtcltk" is the C version of the module name. Slashes are
-;; replaced by spaces, the rest is untouched. `scm_init_gtcltk' is
-;; the real init function that executes the usual initializations
-;; like making new smobs, etc.
-;;
-;; - Make a shared library with your code and a name like
-;;
-;; ice-9/libgtcltk.so
-;;
-;; and put it somewhere in %load-path.
-;;
-;; - Then you can simply write `:use-module (ice-9 gtcltk)' and it
-;; will be linked automatically.
-;;
-;; This is all very experimental.
-
-(define (split-c-module-name str)
- (let loop ((rev '())
- (start 0)
- (pos 0)
- (end (string-length str)))
- (cond
- ((= pos end)
- (reverse (cons (string->symbol (substring str start pos)) rev)))
- ((eq? (string-ref str pos) #\space)
- (loop (cons (string->symbol (substring str start pos)) rev)
- (+ pos 1)
- (+ pos 1)
- end))
- (else
- (loop rev start (+ pos 1) end)))))
-
-(define (convert-c-registered-modules dynobj)
- (let ((res (map (lambda (c)
- (list (split-c-module-name (car c)) (cdr c) dynobj))
- (c-registered-modules))))
- (c-clear-registered-modules)
- res))
-
-(define registered-modules '())
-
-(define (register-modules dynobj)
- (set! registered-modules
- (append! (convert-c-registered-modules dynobj)
- registered-modules)))
-
-(define (init-dynamic-module modname)
- ;; Register any linked modules which has been registered on the C level
- (register-modules #f)
- (or-map (lambda (modinfo)
- (if (equal? (car modinfo) modname)
- (begin
- (set! registered-modules (delq! modinfo registered-modules))
- (let ((mod (resolve-module modname #f)))
- (save-module-excursion
- (lambda ()
- (set-current-module mod)
- (set-module-public-interface! mod mod)
- (dynamic-call (cadr modinfo) (caddr modinfo))
- ))
- #t))
- #f))
- registered-modules))
-
-(define (dynamic-maybe-call name dynobj)
- (catch #t ; could use false-if-exception here
- (lambda ()
- (dynamic-call name dynobj))
- (lambda args
- #f)))
-
-(define (dynamic-maybe-link filename)
- (catch #t ; could use false-if-exception here
- (lambda ()
- (dynamic-link filename))
- (lambda args
- #f)))
-
-(define (find-and-link-dynamic-module module-name)
- (define (make-init-name mod-name)
- (string-append "scm_init"
- (list->string (map (lambda (c)
- (if (or (char-alphabetic? c)
- (char-numeric? c))
- c
- #\_))
- (string->list mod-name)))
- "_module"))
-
- ;; Put the subdirectory for this module in the car of SUBDIR-AND-LIBNAME,
- ;; and the `libname' (the name of the module prepended by `lib') in the cdr
- ;; field. For example, if MODULE-NAME is the list (inet tcp-ip udp), then
- ;; SUBDIR-AND-LIBNAME will be the pair ("inet/tcp-ip" . "libudp").
- (let ((subdir-and-libname
- (let loop ((dirs "")
- (syms module-name))
- (if (null? (cdr syms))
- (cons dirs (string-append "lib" (car syms)))
- (loop (string-append dirs (car syms) "/") (cdr syms)))))
- (init (make-init-name (apply string-append
- (map (lambda (s)
- (string-append "_" s))
- module-name)))))
- (let ((subdir (car subdir-and-libname))
- (libname (cdr subdir-and-libname)))
-
- ;; Now look in each dir in %LOAD-PATH for `subdir/libfoo.la'. If that
- ;; file exists, fetch the dlname from that file and attempt to link
- ;; against it. If `subdir/libfoo.la' does not exist, or does not seem
- ;; to name any shared library, look for `subdir/libfoo.so' instead and
- ;; link against that.
- (let check-dirs ((dir-list %load-path))
- (if (null? dir-list)
- #f
- (let* ((dir (in-vicinity (car dir-list) subdir))
- (sharlib-full
- (or (try-using-libtool-name dir libname)
- (try-using-sharlib-name dir libname))))
- (if (and sharlib-full (file-exists? sharlib-full))
- (link-dynamic-module sharlib-full init)
- (check-dirs (cdr dir-list)))))))))
-
-(define (try-using-libtool-name libdir libname)
- (let ((libtool-filename (in-vicinity libdir
- (string-append libname ".la"))))
- (and (file-exists? libtool-filename)
- libtool-filename)))
-
-(define (try-using-sharlib-name libdir libname)
- (in-vicinity libdir (string-append libname ".so")))
-
-(define (link-dynamic-module filename initname)
- ;; Register any linked modules which has been registered on the C level
- (register-modules #f)
- (let ((dynobj (dynamic-link filename)))
- (dynamic-call initname dynobj)
- (register-modules dynobj)))
-
-(define (try-module-linked module-name)
- (init-dynamic-module module-name))
-
-(define (try-module-dynamic-link module-name)
- (and (find-and-link-dynamic-module module-name)
- (init-dynamic-module module-name)))
-
+;;; {Dynamic linking of modules}
+;;;
(define autoloads-done '((guile . guile)))
(set! autoloads-done (delete! n autoloads-done))
(set! autoloads-in-progress (delete! n autoloads-in-progress)))))
-
-
-
-\f
-;;; {Macros}
-;;;
-
-(define (primitive-macro? m)
- (and (macro? m)
- (not (macro-transformer m))))
-
-;;; {Defmacros}
-;;;
-(define macro-table (make-weak-key-hash-table 523))
-(define xformer-table (make-weak-key-hash-table 523))
-
-(define (defmacro? m) (hashq-ref macro-table m))
-(define (assert-defmacro?! m) (hashq-set! macro-table m #t))
-(define (defmacro-transformer m) (hashq-ref xformer-table m))
-(define (set-defmacro-transformer! m t) (hashq-set! xformer-table m t))
-
-(define defmacro:transformer
- (lambda (f)
- (let* ((xform (lambda (exp env)
- (copy-tree (apply f (cdr exp)))))
- (a (procedure->memoizing-macro xform)))
- (assert-defmacro?! a)
- (set-defmacro-transformer! a f)
- a)))
-
-
-(define defmacro
- (let ((defmacro-transformer
- (lambda (name parms . body)
- (let ((transformer `(lambda ,parms ,@body)))
- `(define ,name
- (,(lambda (transformer)
- (defmacro:transformer transformer))
- ,transformer))))))
- (defmacro:transformer defmacro-transformer)))
-
-(define defmacro:syntax-transformer
- (lambda (f)
- (procedure->syntax
- (lambda (exp env)
- (copy-tree (apply f (cdr exp)))))))
-
-
-;; XXX - should the definition of the car really be looked up in the
-;; current module?
-
-(define (macroexpand-1 e)
- (cond
- ((pair? e) (let* ((a (car e))
- (val (and (symbol? a) (local-ref (list a)))))
- (if (defmacro? val)
- (apply (defmacro-transformer val) (cdr e))
- e)))
- (#t e)))
-
-(define (macroexpand e)
- (cond
- ((pair? e) (let* ((a (car e))
- (val (and (symbol? a) (local-ref (list a)))))
- (if (defmacro? val)
- (macroexpand (apply (defmacro-transformer val) (cdr e)))
- e)))
- (#t e)))
-
-(define (gentemp)
- (gensym "scm:G"))
-
-(provide 'defmacro)
-
\f
;;; {Run-time options}
+;;;
-((let* ((names '((eval-options-interface
- (eval-options eval-enable eval-disable)
- (eval-set!))
-
- (debug-options-interface
- (debug-options debug-enable debug-disable)
- (debug-set!))
-
- (evaluator-traps-interface
- (traps trap-enable trap-disable)
- (trap-set!))
-
- (read-options-interface
- (read-options read-enable read-disable)
- (read-set!))
-
- (print-options-interface
- (print-options print-enable print-disable)
- (print-set!))
-
- (readline-options-interface
- (readline-options readline-enable readline-disable)
- (readline-set!))
- ))
- (option-name car)
- (option-value cadr)
- (option-documentation caddr)
-
- (print-option (lambda (option)
- (display (option-name option))
- (if (< (string-length
- (symbol->string (option-name option)))
- 8)
- (display #\tab))
- (display #\tab)
- (display (option-value option))
- (display #\tab)
- (display (option-documentation option))
- (newline)))
-
- ;; Below follows the macros defining the run-time option interfaces.
-
- (make-options (lambda (interface)
- `(lambda args
- (cond ((null? args) (,interface))
- ((list? (car args))
- (,interface (car args)) (,interface))
- (else (for-each ,print-option
- (,interface #t)))))))
-
- (make-enable (lambda (interface)
- `(lambda flags
- (,interface (append flags (,interface)))
- (,interface))))
-
- (make-disable (lambda (interface)
+(defmacro define-option-interface (option-group)
+ (let* ((option-name car)
+ (option-value cadr)
+ (option-documentation caddr)
+
+ ;; Below follow the macros defining the run-time option interfaces.
+
+ (make-options (lambda (interface)
+ `(lambda args
+ (cond ((null? args) (,interface))
+ ((list? (car args))
+ (,interface (car args)) (,interface))
+ (else (for-each
+ (lambda (option)
+ (display (option-name option))
+ (if (< (string-length
+ (symbol->string (option-name option)))
+ 8)
+ (display #\tab))
+ (display #\tab)
+ (display (option-value option))
+ (display #\tab)
+ (display (option-documentation option))
+ (newline))
+ (,interface #t)))))))
+
+ (make-enable (lambda (interface)
`(lambda flags
- (let ((options (,interface)))
- (for-each (lambda (flag)
- (set! options (delq! flag options)))
- flags)
- (,interface options)
- (,interface)))))
-
- (make-set! (lambda (interface)
- `((name exp)
- (,'quasiquote
- (begin (,interface (append (,interface)
- (list '(,'unquote name)
- (,'unquote exp))))
- (,interface))))))
- )
- (procedure->macro
- (lambda (exp env)
- (cons 'begin
- (apply append
- (map (lambda (group)
- (let ((interface (car group)))
- (append (map (lambda (name constructor)
- `(define ,name
- ,(constructor interface)))
- (cadr group)
- (list make-options
- make-enable
- make-disable))
- (map (lambda (name constructor)
- `(defmacro ,name
- ,@(constructor interface)))
- (caddr group)
- (list make-set!)))))
- names)))))))
+ (,interface (append flags (,interface)))
+ (,interface))))
+
+ (make-disable (lambda (interface)
+ `(lambda flags
+ (let ((options (,interface)))
+ (for-each (lambda (flag)
+ (set! options (delq! flag options)))
+ flags)
+ (,interface options)
+ (,interface))))))
+ (let* ((interface (car option-group))
+ (options/enable/disable (cadr option-group)))
+ `(begin
+ (define ,(car options/enable/disable)
+ ,(make-options interface))
+ (define ,(cadr options/enable/disable)
+ ,(make-enable interface))
+ (define ,(caddr options/enable/disable)
+ ,(make-disable interface))
+ (defmacro ,(caaddr option-group) (opt val)
+ `(,',(car options/enable/disable)
+ (append (,',(car options/enable/disable))
+ (list ',opt ,val))))))))
+
+(define-option-interface
+ (eval-options-interface
+ (eval-options eval-enable eval-disable)
+ (eval-set!)))
+
+(define-option-interface
+ (debug-options-interface
+ (debug-options debug-enable debug-disable)
+ (debug-set!)))
+
+(define-option-interface
+ (evaluator-traps-interface
+ (traps trap-enable trap-disable)
+ (trap-set!)))
+
+(define-option-interface
+ (read-options-interface
+ (read-options read-enable read-disable)
+ (read-set!)))
+
+(define-option-interface
+ (print-options-interface
+ (print-options print-enable print-disable)
+ (print-set!)))
\f
(save-stack lazy-handler-dispatch)
(apply throw key args))
-(define enter-frame-handler default-lazy-handler)
-(define apply-frame-handler default-lazy-handler)
-(define exit-frame-handler default-lazy-handler)
-
(define (lazy-handler-dispatch key . args)
- (case key
- ((apply-frame)
- (apply apply-frame-handler key args))
- ((exit-frame)
- (apply exit-frame-handler key args))
- ((enter-frame)
- (apply enter-frame-handler key args))
- (else
- (apply default-lazy-handler key args))))
+ (apply default-lazy-handler key args))
(define abort-hook (make-hook))
(let ((status #f)
(interactive #t))
(define (loop first)
- (let ((next
+ (let ((next
(catch #t
(lambda ()
- (lazy-catch #t
- (lambda ()
- (dynamic-wind
- (lambda () (unmask-signals))
- (lambda ()
- (with-traps
- (lambda ()
- (first)
-
- ;; This line is needed because mark
- ;; doesn't do closures quite right.
- ;; Unreferenced locals should be
- ;; collected.
- ;;
- (set! first #f)
- (let loop ((v (thunk)))
- (loop (thunk)))
- #f)))
- (lambda () (mask-signals))))
-
- lazy-handler-dispatch))
-
+ (call-with-unblocked-asyncs
+ (lambda ()
+ (with-traps
+ (lambda ()
+ (first)
+
+ ;; This line is needed because mark
+ ;; doesn't do closures quite right.
+ ;; Unreferenced locals should be
+ ;; collected.
+ (set! first #f)
+ (let loop ((v (thunk)))
+ (loop (thunk)))
+ #f)))))
+
(lambda (key . args)
(case key
((quit)
(cond ((= (length args) 4)
(apply handle-system-error key args))
(else
- (apply bad-throw key args))))))))))
+ (apply bad-throw key args)))))))
+
+ ;; Note that having just `lazy-handler-dispatch'
+ ;; here is connected with the mechanism that
+ ;; produces a nice backtrace upon error. If, for
+ ;; example, this is replaced with (lambda args
+ ;; (apply lazy-handler-dispatch args)), the stack
+ ;; cutting (in save-stack) goes wrong and ends up
+ ;; saving no stack at all, so there is no
+ ;; backtrace.
+ lazy-handler-dispatch)))
+
(if next (loop next) status)))
(set! set-batch-mode?! (lambda (arg)
- (cond (arg
+ (cond (arg
(set! interactive #f)
(restore-signals))
(#t
(error "sorry, not implemented")))))
(set! batch-mode? (lambda () (not interactive)))
- (loop (lambda () #t))))
+ (call-with-blocked-asyncs
+ (lambda () (loop (lambda () #t))))))
;;(define the-last-stack (make-fluid)) Defined by scm_init_backtrace ()
(define before-signal-stack (make-fluid))
the-last-stack
(case (stack-id #t)
((repl-stack)
- (apply make-stack #t save-stack eval #t 0 narrowing))
+ (apply make-stack #t save-stack primitive-eval #t 0 narrowing))
((load-stack)
(apply make-stack #t save-stack 0 #t 0 narrowing))
((tk-stack)
(let ((cep (current-error-port)))
(cond ((not (stack? (fluid-ref the-last-stack))))
((memq 'backtrace (debug-options-interface))
- (run-hook before-backtrace-hook)
- (newline cep)
- (display "Backtrace:\n")
- (display-backtrace (fluid-ref the-last-stack) cep)
- (newline cep)
- (run-hook after-backtrace-hook)))
+ (let ((highlights (if (or (eq? key 'wrong-type-arg)
+ (eq? key 'out-of-range))
+ (list-ref args 3)
+ '())))
+ (run-hook before-backtrace-hook)
+ (newline cep)
+ (display "Backtrace:\n")
+ (display-backtrace (fluid-ref the-last-stack) cep
+ #f #f highlights)
+ (newline cep)
+ (run-hook after-backtrace-hook))))
(run-hook before-error-hook)
(apply display-error (fluid-ref the-last-stack) cep args)
(run-hook after-error-hook)
;; (display "No backtrace available.\n")))
(define (error-catching-repl r e p)
- (error-catching-loop (lambda () (p (e (r))))))
+ (error-catching-loop
+ (lambda ()
+ (call-with-values (lambda () (e (r)))
+ (lambda the-values (for-each p the-values))))))
(define (gc-run-time)
(cdr (assq 'gc-time-taken (gc-stats))))
(define before-read-hook (make-hook))
(define after-read-hook (make-hook))
+(define before-eval-hook (make-hook 1))
+(define after-eval-hook (make-hook 1))
+(define before-print-hook (make-hook 1))
+(define after-print-hook (make-hook 1))
;;; The default repl-reader function. We may override this if we've
;;; the readline library.
(define repl-reader
(lambda (prompt)
- (display prompt)
+ (display (if (string? prompt) prompt (prompt)))
(force-output)
(run-hook before-read-hook)
- (read (current-input-port))))
+ ((or (fluid-ref current-reader) read) (current-input-port))))
(define (scm-style-repl)
+
(letrec (
(start-gc-rt #f)
(start-rt #f)
(-eval (lambda (sourc)
(repl-report-start-timing)
- (start-stack 'repl-stack (eval sourc))))
+ (run-hook before-eval-hook sourc)
+ (let ((val (start-stack 'repl-stack
+ ;; If you change this procedure
+ ;; (primitive-eval), please also
+ ;; modify the repl-stack case in
+ ;; save-stack so that stack cutting
+ ;; continues to work.
+ (primitive-eval sourc))))
+ (run-hook after-eval-hook sourc)
+ val)))
- (-print (lambda (result)
- (if (not scm-repl-silent)
- (begin
- (if (or scm-repl-print-unspecified
- (not (unspecified? result)))
- (begin
- (write result)
- (newline)))
- (if scm-repl-verbose
- (repl-report))
- (force-output)))))
+
+ (-print (let ((maybe-print (lambda (result)
+ (if (or scm-repl-print-unspecified
+ (not (unspecified? result)))
+ (begin
+ (write result)
+ (newline))))))
+ (lambda (result)
+ (if (not scm-repl-silent)
+ (begin
+ (run-hook before-print-hook result)
+ (maybe-print result)
+ (run-hook after-print-hook result)
+ (if scm-repl-verbose
+ (repl-report))
+ (force-output))))))
(-quit (lambda (args)
(if scm-repl-verbose
-eval
-print)))
(-quit status))))
-
+
\f
+
;;; {IOTA functions: generating lists of numbers}
+;;;
(define (iota n)
(let loop ((count (1- n)) (result '()))
(loop (1- count) (cons count result)))))
\f
-;;; {While}
-;;;
-;;; with `continue' and `break'.
-;;;
-
-(defmacro while (cond . body)
- `(letrec ((continue (lambda () (or (not ,cond) (begin (begin ,@ body) (continue)))))
- (break (lambda val (apply throw 'break val))))
- (catch 'break
- (lambda () (continue))
- (lambda v (cadr v)))))
;;; {collect}
;;;
;;; forms instead of the result of the last form.
;;; (The definition relies on the current left-to-right
;;; order of evaluation of operands in applications.)
+;;;
(defmacro collect forms
(cons 'list forms))
+\f
+
;;; {with-fluids}
+;;;
;; with-fluids is a convenience wrapper for the builtin procedure
;; `with-fluids*'. The syntax is just like `let':
;; body)
(defmacro with-fluids (bindings . body)
- `(with-fluids* (list ,@(map car bindings)) (list ,@(map cadr bindings))
- (lambda () ,@body)))
-
-;;; Environments
-
-(define the-environment
- (procedure->syntax
- (lambda (x e)
- e)))
-
-(define (environment-module env)
- (let ((closure (and (pair? env) (car (last-pair env)))))
- (and closure (procedure-property closure 'module))))
+ (let ((fluids (map car bindings))
+ (values (map cadr bindings)))
+ (if (and (= (length fluids) 1) (= (length values) 1))
+ `(with-fluid* ,(car fluids) ,(car values) (lambda () ,@body))
+ `(with-fluids* (list ,@fluids) (list ,@values)
+ (lambda () ,@body)))))
\f
;; coaxing
;;
+(define (primitive-macro? m)
+ (and (macro? m)
+ (not (macro-transformer m))))
+
(defmacro define-macro (first . rest)
(let ((name (if (symbol? first) first (car first)))
(transformer
(if (symbol? first)
(car rest)
`(lambda ,(cdr first) ,@rest))))
- `(define ,name (defmacro:transformer ,transformer))))
+ `(eval-case
+ ((load-toplevel compile-toplevel)
+ (define ,name (defmacro:transformer ,transformer)))
+ (else
+ (error "define-macro can only be used at the top level")))))
+
+
+\f
+
+;;; {While}
+;;;
+;;; with `continue' and `break'.
+;;;
+
+;; The inner `do' loop avoids re-establishing a catch every iteration,
+;; that's only necessary if continue is actually used. A new key is
+;; generated every time, so break and continue apply to their originating
+;; `while' even when recursing.
+;;
+;; FIXME: This macro is unintentionally unhygienic with respect to let,
+;; make-symbol, do, throw, catch, lambda, and not.
+;;
+(define-macro (while cond . body)
+ (let ((keyvar (make-symbol "while-keyvar")))
+ `(let ((,keyvar (make-symbol "while-key")))
+ (do ()
+ ((catch ,keyvar
+ (lambda ()
+ (let ((break (lambda () (throw ,keyvar #t)))
+ (continue (lambda () (throw ,keyvar #f))))
+ (do ()
+ ((not ,cond))
+ ,@body)
+ #t))
+ (lambda (key arg)
+ arg)))))))
-(defmacro define-syntax-macro (first . rest)
- (let ((name (if (symbol? first) first (car first)))
- (transformer
- (if (symbol? first)
- (car rest)
- `(lambda ,(cdr first) ,@rest))))
- `(define ,name (defmacro:syntax-transformer ,transformer))))
\f
+
;;; {Module System Macros}
;;;
+;; Return a list of expressions that evaluate to the appropriate
+;; arguments for resolve-interface according to SPEC.
+
+(eval-case
+ ((compile-toplevel)
+ (if (memq 'prefix (read-options))
+ (error "boot-9 must be compiled with #:kw, not :kw"))))
+
+(define (compile-interface-spec spec)
+ (define (make-keyarg sym key quote?)
+ (cond ((or (memq sym spec)
+ (memq key spec))
+ => (lambda (rest)
+ (if quote?
+ (list key (list 'quote (cadr rest)))
+ (list key (cadr rest)))))
+ (else
+ '())))
+ (define (map-apply func list)
+ (map (lambda (args) (apply func args)) list))
+ (define keys
+ ;; sym key quote?
+ '((:select #:select #t)
+ (:hide #:hide #t)
+ (:prefix #:prefix #t)
+ (:renamer #:renamer #f)))
+ (if (not (pair? (car spec)))
+ `(',spec)
+ `(',(car spec)
+ ,@(apply append (map-apply make-keyarg keys)))))
+
+(define (keyword-like-symbol->keyword sym)
+ (symbol->keyword (string->symbol (substring (symbol->string sym) 1))))
+
+(define (compile-define-module-args args)
+ ;; Just quote everything except #:use-module and #:use-syntax. We
+ ;; need to know about all arguments regardless since we want to turn
+ ;; symbols that look like keywords into real keywords, and the
+ ;; keyword args in a define-module form are not regular
+ ;; (i.e. no-backtrace doesn't take a value).
+ (let loop ((compiled-args `((quote ,(car args))))
+ (args (cdr args)))
+ (cond ((null? args)
+ (reverse! compiled-args))
+ ;; symbol in keyword position
+ ((symbol? (car args))
+ (loop compiled-args
+ (cons (keyword-like-symbol->keyword (car args)) (cdr args))))
+ ((memq (car args) '(#:no-backtrace #:pure))
+ (loop (cons (car args) compiled-args)
+ (cdr args)))
+ ((null? (cdr args))
+ (error "keyword without value:" (car args)))
+ ((memq (car args) '(#:use-module #:use-syntax))
+ (loop (cons* `(list ,@(compile-interface-spec (cadr args)))
+ (car args)
+ compiled-args)
+ (cddr args)))
+ ((eq? (car args) #:autoload)
+ (loop (cons* `(quote ,(caddr args))
+ `(quote ,(cadr args))
+ (car args)
+ compiled-args)
+ (cdddr args)))
+ (else
+ (loop (cons* `(quote ,(cadr args))
+ (car args)
+ compiled-args)
+ (cddr args))))))
+
(defmacro define-module args
- `(let* ((process-define-module process-define-module)
- (set-current-module set-current-module)
- (module (process-define-module ',args)))
- (set-current-module module)
- module))
-
-;; the guts of the use-modules macro. add the interfaces of the named
-;; modules to the use-list of the current module, in order
-(define (process-use-modules module-names)
- (for-each (lambda (module-name)
- (let ((mod-iface (resolve-interface module-name)))
- (or mod-iface
- (error "no such module" module-name))
- (module-use! (current-module) mod-iface)))
- (reverse module-names)))
+ `(eval-case
+ ((load-toplevel compile-toplevel)
+ (let ((m (process-define-module
+ (list ,@(compile-define-module-args args)))))
+ (set-current-module m)
+ m))
+ (else
+ (error "define-module can only be used at the top level"))))
+
+;; The guts of the use-modules macro. Add the interfaces of the named
+;; modules to the use-list of the current module, in order.
+
+;; This function is called by "modules.c". If you change it, be sure
+;; to change scm_c_use_module as well.
+
+(define (process-use-modules module-interface-args)
+ (let ((interfaces (map (lambda (mif-args)
+ (or (apply resolve-interface mif-args)
+ (error "no such module" mif-args)))
+ module-interface-args)))
+ (call-with-deferred-observers
+ (lambda ()
+ (module-use-interfaces! (current-module) interfaces)))))
(defmacro use-modules modules
- `(process-use-modules ',modules))
+ `(eval-case
+ ((load-toplevel compile-toplevel)
+ (process-use-modules
+ (list ,@(map (lambda (m)
+ `(list ,@(compile-interface-spec m)))
+ modules)))
+ *unspecified*)
+ (else
+ (error "use-modules can only be used at the top level"))))
(defmacro use-syntax (spec)
- `(begin
+ `(eval-case
+ ((load-toplevel compile-toplevel)
,@(if (pair? spec)
- `((process-use-modules ',(list spec))
+ `((process-use-modules (list
+ (list ,@(compile-interface-spec spec))))
(set-module-transformer! (current-module)
,(car (last-pair spec))))
`((set-module-transformer! (current-module) ,spec)))
- (set! scm:eval-transformer (module-transformer (current-module)))))
+ *unspecified*)
+ (else
+ (error "use-syntax can only be used at the top level"))))
+;; Dirk:FIXME:: This incorrect (according to R5RS) syntax needs to be changed
+;; as soon as guile supports hygienic macros.
(define define-private define)
(defmacro define-public args
((pair? n) (defined-name (car n)))
(else (syntax))))
(cond
- ((null? args) (syntax))
-
- (#t (let ((name (defined-name (car args))))
- `(begin
- (let ((public-i (module-public-interface (current-module))))
- ;; Make sure there is a local variable:
- ;;
- (module-define! (current-module)
- ',name
- (module-ref (current-module) ',name #f))
-
- ;; Make sure that local is exported:
- ;;
- (module-add! public-i ',name
- (module-variable (current-module) ',name)))
-
- ;; Now (re)define the var normally. Bernard URBAN
- ;; suggests we use eval here to accomodate Hobbit; it lets
- ;; the interpreter handle the define-private form, which
- ;; Hobbit can't digest.
- (eval '(define-private ,@ args)))))))
-
-
+ ((null? args)
+ (syntax))
+ (#t
+ (let ((name (defined-name (car args))))
+ `(begin
+ (define-private ,@args)
+ (eval-case ((load-toplevel compile-toplevel) (export ,name))))))))
(defmacro defmacro-public args
(define (syntax)
(error "bad syntax" (list 'defmacro-public args)))
(define (defined-name n)
(cond
- ((symbol? n) n)
- (else (syntax))))
+ ((symbol? n) n)
+ (else (syntax))))
(cond
- ((null? args) (syntax))
-
- (#t (let ((name (defined-name (car args))))
- `(begin
- (let ((public-i (module-public-interface (current-module))))
- ;; Make sure there is a local variable:
- ;;
- (module-define! (current-module)
- ',name
- (module-ref (current-module) ',name #f))
-
- ;; Make sure that local is exported:
- ;;
- (module-add! public-i ',name (module-variable (current-module) ',name)))
-
- ;; Now (re)define the var normally.
- ;;
- (defmacro ,@ args))))))
-
+ ((null? args)
+ (syntax))
+ (#t
+ (let ((name (defined-name (car args))))
+ `(begin
+ (eval-case ((load-toplevel compile-toplevel) (export-syntax ,name)))
+ (defmacro ,@args))))))
+
+;; Export a local variable
+
+;; This function is called from "modules.c". If you change it, be
+;; sure to update "modules.c" as well.
+
+(define (module-export! m names)
+ (let ((public-i (module-public-interface m)))
+ (for-each (lambda (name)
+ (let ((var (module-ensure-local-variable! m name)))
+ (module-add! public-i name var)))
+ names)))
+
+(define (module-replace! m names)
+ (let ((public-i (module-public-interface m)))
+ (for-each (lambda (name)
+ (let ((var (module-ensure-local-variable! m name)))
+ (set-object-property! var 'replace #t)
+ (module-add! public-i name var)))
+ names)))
+
+;; Re-export a imported variable
+;;
+(define (module-re-export! m names)
+ (let ((public-i (module-public-interface m)))
+ (for-each (lambda (name)
+ (let ((var (module-variable m name)))
+ (cond ((not var)
+ (error "Undefined variable:" name))
+ ((eq? var (module-local-variable m name))
+ (error "re-exporting local variable:" name))
+ (else
+ (module-add! public-i name var)))))
+ names)))
(defmacro export names
- `(let* ((m (current-module))
- (public-i (module-public-interface m)))
- (for-each (lambda (name)
- ;; Make sure there is a local variable:
- (module-define! m name (module-ref m name #f))
- ;; Make sure that local is exported:
- (module-add! public-i name (module-variable m name)))
- ',names)))
+ `(eval-case
+ ((load-toplevel compile-toplevel)
+ (call-with-deferred-observers
+ (lambda ()
+ (module-export! (current-module) ',names))))
+ (else
+ (error "export can only be used at the top level"))))
+
+(defmacro re-export names
+ `(eval-case
+ ((load-toplevel compile-toplevel)
+ (call-with-deferred-observers
+ (lambda ()
+ (module-re-export! (current-module) ',names))))
+ (else
+ (error "re-export can only be used at the top level"))))
+
+(defmacro export-syntax names
+ `(export ,@names))
-(define export-syntax export)
+(defmacro re-export-syntax names
+ `(re-export ,@names))
+(define load load-module)
+;; The following macro allows one to write, for example,
+;;
+;; (@ (ice-9 pretty-print) pretty-print)
+;;
+;; to refer directly to the pretty-print variable in module (ice-9
+;; pretty-print). It works by looking up the variable and inserting
+;; it directly into the code. This is understood by the evaluator.
+;; Indeed, all references to global variables are memoized into such
+;; variable objects.
+(define-macro (@ mod-name var-name)
+ (let ((var (module-variable (resolve-interface mod-name) var-name)))
+ (if (not var)
+ (error "no such public variable" (list '@ mod-name var-name)))
+ var))
-(define load load-module)
+;; The '@@' macro is like '@' but it can also access bindings that
+;; have not been explicitely exported.
+
+(define-macro (@@ mod-name var-name)
+ (let ((var (module-variable (resolve-module mod-name) var-name)))
+ (if (not var)
+ (error "no such variable" (list '@@ mod-name var-name)))
+ var))
+
+\f
+
+;;; {Compiler interface}
+;;;
+;;; The full compiler interface can be found in (system). Here we put a
+;;; few useful procedures into the global namespace.
+
+(module-autoload! the-scm-module
+ '(system base compile)
+ '(compile
+ compile-time-environment))
+
+
+\f
+
+;;; {Parameters}
+;;;
+
+(define make-mutable-parameter
+ (let ((make (lambda (fluid converter)
+ (lambda args
+ (if (null? args)
+ (fluid-ref fluid)
+ (fluid-set! fluid (converter (car args))))))))
+ (lambda (init . converter)
+ (let ((fluid (make-fluid))
+ (converter (if (null? converter)
+ identity
+ (car converter))))
+ (fluid-set! fluid (converter init))
+ (make fluid converter)))))
+
+\f
+
+;;; {Handling of duplicate imported bindings}
+;;;
+
+;; Duplicate handlers take the following arguments:
+;;
+;; module importing module
+;; name conflicting name
+;; int1 old interface where name occurs
+;; val1 value of binding in old interface
+;; int2 new interface where name occurs
+;; val2 value of binding in new interface
+;; var previous resolution or #f
+;; val value of previous resolution
+;;
+;; A duplicate handler can take three alternative actions:
+;;
+;; 1. return #f => leave responsibility to next handler
+;; 2. exit with an error
+;; 3. return a variable resolving the conflict
+;;
+
+(define duplicate-handlers
+ (let ((m (make-module 7)))
+
+ (define (check module name int1 val1 int2 val2 var val)
+ (scm-error 'misc-error
+ #f
+ "~A: `~A' imported from both ~A and ~A"
+ (list (module-name module)
+ name
+ (module-name int1)
+ (module-name int2))
+ #f))
+
+ (define (warn module name int1 val1 int2 val2 var val)
+ (format (current-error-port)
+ "WARNING: ~A: `~A' imported from both ~A and ~A\n"
+ (module-name module)
+ name
+ (module-name int1)
+ (module-name int2))
+ #f)
+
+ (define (replace module name int1 val1 int2 val2 var val)
+ (let ((old (or (and var (object-property var 'replace) var)
+ (module-variable int1 name)))
+ (new (module-variable int2 name)))
+ (if (object-property old 'replace)
+ (and (or (eq? old new)
+ (not (object-property new 'replace)))
+ old)
+ (and (object-property new 'replace)
+ new))))
+
+ (define (warn-override-core module name int1 val1 int2 val2 var val)
+ (and (eq? int1 the-scm-module)
+ (begin
+ (format (current-error-port)
+ "WARNING: ~A: imported module ~A overrides core binding `~A'\n"
+ (module-name module)
+ (module-name int2)
+ name)
+ (module-local-variable int2 name))))
+
+ (define (first module name int1 val1 int2 val2 var val)
+ (or var (module-local-variable int1 name)))
+
+ (define (last module name int1 val1 int2 val2 var val)
+ (module-local-variable int2 name))
+
+ (define (noop module name int1 val1 int2 val2 var val)
+ #f)
+
+ (set-module-name! m 'duplicate-handlers)
+ (set-module-kind! m 'interface)
+ (module-define! m 'check check)
+ (module-define! m 'warn warn)
+ (module-define! m 'replace replace)
+ (module-define! m 'warn-override-core warn-override-core)
+ (module-define! m 'first first)
+ (module-define! m 'last last)
+ (module-define! m 'merge-generics noop)
+ (module-define! m 'merge-accessors noop)
+ m))
+
+(define (lookup-duplicates-handlers handler-names)
+ (and handler-names
+ (map (lambda (handler-name)
+ (or (module-symbol-local-binding
+ duplicate-handlers handler-name #f)
+ (error "invalid duplicate handler name:"
+ handler-name)))
+ (if (list? handler-names)
+ handler-names
+ (list handler-names)))))
+
+(define default-duplicate-binding-procedures
+ (make-mutable-parameter #f))
+
+(define default-duplicate-binding-handler
+ (make-mutable-parameter '(replace warn-override-core warn last)
+ (lambda (handler-names)
+ (default-duplicate-binding-procedures
+ (lookup-duplicates-handlers handler-names))
+ handler-names)))
+
+\f
+;;; {`cond-expand' for SRFI-0 support.}
+;;;
+;;; This syntactic form expands into different commands or
+;;; definitions, depending on the features provided by the Scheme
+;;; implementation.
+;;;
+;;; Syntax:
+;;;
+;;; <cond-expand>
+;;; --> (cond-expand <cond-expand-clause>+)
+;;; | (cond-expand <cond-expand-clause>* (else <command-or-definition>))
+;;; <cond-expand-clause>
+;;; --> (<feature-requirement> <command-or-definition>*)
+;;; <feature-requirement>
+;;; --> <feature-identifier>
+;;; | (and <feature-requirement>*)
+;;; | (or <feature-requirement>*)
+;;; | (not <feature-requirement>)
+;;; <feature-identifier>
+;;; --> <a symbol which is the name or alias of a SRFI>
+;;;
+;;; Additionally, this implementation provides the
+;;; <feature-identifier>s `guile' and `r5rs', so that programs can
+;;; determine the implementation type and the supported standard.
+;;;
+;;; Currently, the following feature identifiers are supported:
+;;;
+;;; guile r5rs srfi-0 srfi-4 srfi-6 srfi-13 srfi-14 srfi-55 srfi-61
+;;;
+;;; Remember to update the features list when adding more SRFIs.
+;;;
+
+(define %cond-expand-features
+ ;; Adjust the above comment when changing this.
+ '(guile
+ r5rs
+ srfi-0 ;; cond-expand itself
+ srfi-4 ;; homogenous numeric vectors
+ srfi-6 ;; open-input-string etc, in the guile core
+ srfi-13 ;; string library
+ srfi-14 ;; character sets
+ srfi-55 ;; require-extension
+ srfi-61 ;; general cond clause
+ ))
+
+;; This table maps module public interfaces to the list of features.
+;;
+(define %cond-expand-table (make-hash-table 31))
+
+;; Add one or more features to the `cond-expand' feature list of the
+;; module `module'.
+;;
+(define (cond-expand-provide module features)
+ (let ((mod (module-public-interface module)))
+ (and mod
+ (hashq-set! %cond-expand-table mod
+ (append (hashq-ref %cond-expand-table mod '())
+ features)))))
+
+(define cond-expand
+ (procedure->memoizing-macro
+ (lambda (exp env)
+ (let ((clauses (cdr exp))
+ (syntax-error (lambda (cl)
+ (error "invalid clause in `cond-expand'" cl))))
+ (letrec
+ ((test-clause
+ (lambda (clause)
+ (cond
+ ((symbol? clause)
+ (or (memq clause %cond-expand-features)
+ (let lp ((uses (module-uses (env-module env))))
+ (if (pair? uses)
+ (or (memq clause
+ (hashq-ref %cond-expand-table
+ (car uses) '()))
+ (lp (cdr uses)))
+ #f))))
+ ((pair? clause)
+ (cond
+ ((eq? 'and (car clause))
+ (let lp ((l (cdr clause)))
+ (cond ((null? l)
+ #t)
+ ((pair? l)
+ (and (test-clause (car l)) (lp (cdr l))))
+ (else
+ (syntax-error clause)))))
+ ((eq? 'or (car clause))
+ (let lp ((l (cdr clause)))
+ (cond ((null? l)
+ #f)
+ ((pair? l)
+ (or (test-clause (car l)) (lp (cdr l))))
+ (else
+ (syntax-error clause)))))
+ ((eq? 'not (car clause))
+ (cond ((not (pair? (cdr clause)))
+ (syntax-error clause))
+ ((pair? (cddr clause))
+ ((syntax-error clause))))
+ (not (test-clause (cadr clause))))
+ (else
+ (syntax-error clause))))
+ (else
+ (syntax-error clause))))))
+ (let lp ((c clauses))
+ (cond
+ ((null? c)
+ (error "Unfulfilled `cond-expand'"))
+ ((not (pair? c))
+ (syntax-error c))
+ ((not (pair? (car c)))
+ (syntax-error (car c)))
+ ((test-clause (caar c))
+ `(begin ,@(cdar c)))
+ ((eq? (caar c) 'else)
+ (if (pair? (cdr c))
+ (syntax-error c))
+ `(begin ,@(cdar c)))
+ (else
+ (lp (cdr c))))))))))
+
+;; This procedure gets called from the startup code with a list of
+;; numbers, which are the numbers of the SRFIs to be loaded on startup.
+;;
+(define (use-srfis srfis)
+ (process-use-modules
+ (map (lambda (num)
+ (list (list 'srfi (string->symbol
+ (string-append "srfi-" (number->string num))))))
+ srfis)))
+
+\f
+
+;;; srfi-55: require-extension
+;;;
+
+(define-macro (require-extension extension-spec)
+ ;; This macro only handles the srfi extension, which, at present, is
+ ;; the only one defined by the standard.
+ (if (not (pair? extension-spec))
+ (scm-error 'wrong-type-arg "require-extension"
+ "Not an extension: ~S" (list extension-spec) #f))
+ (let ((extension (car extension-spec))
+ (extension-args (cdr extension-spec)))
+ (case extension
+ ((srfi)
+ (let ((use-list '()))
+ (for-each
+ (lambda (i)
+ (if (not (integer? i))
+ (scm-error 'wrong-type-arg "require-extension"
+ "Invalid srfi name: ~S" (list i) #f))
+ (let ((srfi-sym (string->symbol
+ (string-append "srfi-" (number->string i)))))
+ (if (not (memq srfi-sym %cond-expand-features))
+ (set! use-list (cons `(use-modules (srfi ,srfi-sym))
+ use-list)))))
+ extension-args)
+ (if (pair? use-list)
+ ;; i.e. (begin (use-modules x) (use-modules y) (use-modules z))
+ `(begin ,@(reverse! use-list)))))
+ (else
+ (scm-error
+ 'wrong-type-arg "require-extension"
+ "Not a recognized extension type: ~S" (list extension) #f)))))
\f
+
;;; {Load emacs interface support if emacs option is given.}
+;;;
+
+(define (named-module-use! user usee)
+ (module-use! (resolve-module user) (resolve-interface usee)))
(define (load-emacs-interface)
- (if (memq 'debug-extensions *features*)
- (debug-enable 'backtrace))
- (define-module (guile-user) :use-module (ice-9 emacs)))
+ (and (provided? 'debug-extensions)
+ (debug-enable 'backtrace))
+ (named-module-use! '(guile-user) '(ice-9 emacs)))
\f
(lambda () (fluid-ref using-readline?))
(lambda (v) (fluid-set! using-readline? v)))))
-;; this is just (scm-style-repl) with a wrapper to install and remove
-;; signal handlers.
-(define (top-repl)
-
- ;; Load emacs interface support if emacs option is given.
- (if (and (module-defined? the-root-module 'use-emacs-interface)
- use-emacs-interface)
- (load-emacs-interface))
-
- ;; Place the user in the guile-user module.
- (define-module (guile-user)
- :use-module (guile) ;so that bindings will be checked here first
- :use-module (ice-9 session)
- :use-module (ice-9 debug)
- :autoload (ice-9 debugger) (debug)) ;load debugger on demand
- (if (memq 'threads *features*)
- (define-module (guile-user) :use-module (ice-9 threads)))
- (if (memq 'regex *features*)
- (define-module (guile-user) :use-module (ice-9 regex)))
-
- (let ((old-handlers #f)
- (signals (if (provided? 'posix)
- `((,SIGINT . "User interrupt")
- (,SIGFPE . "Arithmetic error")
- (,SIGBUS . "Bad memory access (bus error)")
- (,SIGSEGV .
- "Bad memory access (Segmentation violation)"))
- '())))
-
- (dynamic-wind
-
- ;; call at entry
- (lambda ()
- (let ((make-handler (lambda (msg)
- (lambda (sig)
- ;; Make a backup copy of the stack
- (fluid-set! before-signal-stack
- (fluid-ref the-last-stack))
- (save-stack %deliver-signals)
- (scm-error 'signal
- #f
- msg
- #f
- (list sig))))))
- (set! old-handlers
- (map (lambda (sig-msg)
- (sigaction (car sig-msg)
- (make-handler (cdr sig-msg))))
- signals))))
-
- ;; the protected thunk.
- (lambda ()
- (let ((status (scm-style-repl)))
- (run-hook exit-hook)
- status))
-
- ;; call at exit.
- (lambda ()
- (map (lambda (sig-msg old-handler)
- (if (not (car old-handler))
- ;; restore original C handler.
- (sigaction (car sig-msg) #f)
- ;; restore Scheme handler, SIG_IGN or SIG_DFL.
- (sigaction (car sig-msg)
- (car old-handler)
- (cdr old-handler))))
- signals old-handlers)))))
-
-(defmacro false-if-exception (expr)
- `(catch #t (lambda () ,expr)
- (lambda args #f)))
+(define (top-repl)
+ (let ((guile-user-module (resolve-module '(guile-user))))
+
+ ;; Load emacs interface support if emacs option is given.
+ (if (and (module-defined? guile-user-module 'use-emacs-interface)
+ (module-ref guile-user-module 'use-emacs-interface))
+ (load-emacs-interface))
+
+ ;; Use some convenient modules (in reverse order)
+
+ (set-current-module guile-user-module)
+ (process-use-modules
+ (append
+ '(((ice-9 r5rs))
+ ((ice-9 session))
+ ((ice-9 debug)))
+ (if (provided? 'regex)
+ '(((ice-9 regex)))
+ '())
+ (if (provided? 'threads)
+ '(((ice-9 threads)))
+ '())))
+ ;; load debugger on demand
+ (module-autoload! guile-user-module '(ice-9 debugger) '(debug))
+
+ ;; Note: SIGFPE, SIGSEGV and SIGBUS are actually "query-only" (see
+ ;; scmsigs.c scm_sigaction_for_thread), so the handlers setup here have
+ ;; no effect.
+ (let ((old-handlers #f)
+ (start-repl (module-ref (resolve-interface '(system repl repl))
+ 'start-repl))
+ (signals (if (provided? 'posix)
+ `((,SIGINT . "User interrupt")
+ (,SIGFPE . "Arithmetic error")
+ (,SIGSEGV
+ . "Bad memory access (Segmentation violation)"))
+ '())))
+ ;; no SIGBUS on mingw
+ (if (defined? 'SIGBUS)
+ (set! signals (acons SIGBUS "Bad memory access (bus error)"
+ signals)))
+
+ (dynamic-wind
+
+ ;; call at entry
+ (lambda ()
+ (let ((make-handler (lambda (msg)
+ (lambda (sig)
+ ;; Make a backup copy of the stack
+ (fluid-set! before-signal-stack
+ (fluid-ref the-last-stack))
+ (save-stack 2)
+ (scm-error 'signal
+ #f
+ msg
+ #f
+ (list sig))))))
+ (set! old-handlers
+ (map (lambda (sig-msg)
+ (sigaction (car sig-msg)
+ (make-handler (cdr sig-msg))))
+ signals))))
+
+ ;; the protected thunk.
+ (lambda ()
+ (let ((status (start-repl 'scheme)))
+ (run-hook exit-hook)
+ status))
+
+ ;; call at exit.
+ (lambda ()
+ (map (lambda (sig-msg old-handler)
+ (if (not (car old-handler))
+ ;; restore original C handler.
+ (sigaction (car sig-msg) #f)
+ ;; restore Scheme handler, SIG_IGN or SIG_DFL.
+ (sigaction (car sig-msg)
+ (car old-handler)
+ (cdr old-handler))))
+ signals old-handlers))))))
;;; This hook is run at the very end of an interactive session.
;;;
(define exit-hook (make-hook))
\f
-(define-module (guile))
-(append! %load-path (cons "." ()))
+;;; {Deprecated stuff}
+;;;
+
+(begin-deprecated
+ (define (feature? sym)
+ (issue-deprecation-warning
+ "`feature?' is deprecated. Use `provided?' instead.")
+ (provided? sym)))
+
+(begin-deprecated
+ (primitive-load-path "ice-9/deprecated"))
+
+\f
+
+;;; Place the user in the guile-user module.
+;;;
+
+(define-module (guile-user))
+
+;;; boot-9.scm ends here
HCoop / bpt / guile.git / blobdiff