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Diffstat (limited to 'module/ice-9/boot-9.scm')
| -rw-r--r-- | module/ice-9/boot-9.scm | 3517 |
1 files changed, 3517 insertions, 0 deletions
diff --git a/module/ice-9/boot-9.scm b/module/ice-9/boot-9.scm new file mode 100644 index 000000000..21e3506cd --- /dev/null +++ b/module/ice-9/boot-9.scm @@ -0,0 +1,3517 @@ +;;; installed-scm-file + +;;;; Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009 +;;;; 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 3 of the License, or (at your option) any later version. +;;;; +;;;; 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 +;;;; 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 +;;;; + + + +;;; 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 +;;; file. +;;; + +;;; Code: + + + +;; 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-when (compile) + (set-current-module (resolve-module '(guile)))) + +;;; {R4RS compliance} +;;; + +(primitive-load-path "ice-9/r4rs") + + + +;;; {Simple Debugging Tools} +;;; + +;; peek takes any number of arguments, writes them to the +;; current ouput port, and returns the last argument. +;; It is handy to wrap around an expression to look at +;; a value each time is evaluated, e.g.: +;; +;; (+ 10 (troublesome-fn)) +;; => (+ 10 (pk 'troublesome-fn-returned (troublesome-fn))) +;; + +(define (peek . stuff) + (newline) + (display ";;; ") + (write stuff) + (newline) + (car (last-pair stuff))) + +(define pk peek) + +(define (warn . stuff) + (with-output-to-port (current-error-port) + (lambda () + (newline) + (display ";;; WARNING ") + (display stuff) + (newline) + (car (last-pair stuff))))) + + + +;;; {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. + +(define (provided? feature) + (and (memq feature *features*) #t)) + + + +;;; {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...) ...) +;;; + +;; 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)) + (and result + (or (and (null? l) + result) + (loop (f (car l)) (cdr l)))))) + +;; or-map f l +;; +;; Apply f to successive elements of l until exhaustion or while f returns #f. +;; If returning early, return the return value of f. +;; +(define (or-map f lst) + (let loop ((result #f) + (l lst)) + (or result + (and (not (null? l)) + (loop (f (car l)) (cdr l)))))) + + + +;; 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)) + + + +;; Define a minimal stub of the module API for psyntax, before modules +;; have booted. +(define (module-name x) + '(guile)) +(define (module-define! module sym val) + (let ((v (hashq-ref (%get-pre-modules-obarray) sym))) + (if v + (variable-set! v val) + (hashq-set! (%get-pre-modules-obarray) sym + (make-variable val))))) +(define (module-ref module sym) + (let ((v (module-variable module sym))) + (if v (variable-ref v) (error "badness!" (pk module) (pk sym))))) +(define (resolve-module . args) + #f) + +;; Input hook to syncase -- so that we might be able to pass annotated +;; expressions in. Currently disabled. Maybe we should just use +;; source-properties directly. +(define (annotation? x) #f) + +;; API provided by psyntax +(define syntax-violation #f) +(define datum->syntax #f) +(define syntax->datum #f) +(define identifier? #f) +(define generate-temporaries #f) +(define bound-identifier=? #f) +(define free-identifier=? #f) +(define sc-expand #f) + +;; $sc-expand is an implementation detail of psyntax. It is used by +;; expanded macros, to dispatch an input against a set of patterns. +(define $sc-dispatch #f) + +;; Load it up! +(primitive-load-path "ice-9/psyntax-pp") + +;; %pre-modules-transformer is the Scheme expander from now until the +;; module system has booted up. +(define %pre-modules-transformer sc-expand) + +(define-syntax and + (syntax-rules () + ((_) #t) + ((_ x) x) + ((_ x y ...) (if x (and y ...) #f)))) + +(define-syntax or + (syntax-rules () + ((_) #f) + ((_ x) x) + ((_ x y ...) (let ((t x)) (if t t (or y ...)))))) + +;; The "maybe-more" bits are something of a hack, so that we can support +;; SRFI-61. Rewrites into a standalone syntax-case macro would be +;; appreciated. +(define-syntax cond + (syntax-rules (=> else) + ((_ "maybe-more" test consequent) + (if test consequent)) + + ((_ "maybe-more" test consequent clause ...) + (if test consequent (cond clause ...))) + + ((_ (else else1 else2 ...)) + (begin else1 else2 ...)) + + ((_ (test => receiver) more-clause ...) + (let ((t test)) + (cond "maybe-more" t (receiver t) more-clause ...))) + + ((_ (generator guard => receiver) more-clause ...) + (call-with-values (lambda () generator) + (lambda t + (cond "maybe-more" + (apply guard t) (apply receiver t) more-clause ...)))) + + ((_ (test => receiver ...) more-clause ...) + (syntax-violation 'cond "wrong number of receiver expressions" + '(test => receiver ...))) + ((_ (generator guard => receiver ...) more-clause ...) + (syntax-violation 'cond "wrong number of receiver expressions" + '(generator guard => receiver ...))) + + ((_ (test) more-clause ...) + (let ((t test)) + (cond "maybe-more" t t more-clause ...))) + + ((_ (test body1 body2 ...) more-clause ...) + (cond "maybe-more" + test (begin body1 body2 ...) more-clause ...)))) + +(define-syntax case + (syntax-rules (else) + ((case (key ...) + clauses ...) + (let ((atom-key (key ...))) + (case atom-key clauses ...))) + ((case key + (else result1 result2 ...)) + (begin result1 result2 ...)) + ((case key + ((atoms ...) result1 result2 ...)) + (if (memv key '(atoms ...)) + (begin result1 result2 ...))) + ((case key + ((atoms ...) result1 result2 ...) + clause clauses ...) + (if (memv key '(atoms ...)) + (begin result1 result2 ...) + (case key clause clauses ...))))) + +(define-syntax do + (syntax-rules () + ((do ((var init step ...) ...) + (test expr ...) + command ...) + (letrec + ((loop + (lambda (var ...) + (if test + (begin + (if #f #f) + expr ...) + (begin + command + ... + (loop (do "step" var step ...) + ...)))))) + (loop init ...))) + ((do "step" x) + x) + ((do "step" x y) + y))) + +(define-syntax delay + (syntax-rules () + ((_ exp) (make-promise (lambda () exp))))) + +;;; @bind is used by the old elisp code as a dynamic scoping mechanism. +;;; Please let the Guile developers know if you are using this macro. +;;; +(define-syntax @bind + (lambda (x) + (define (bound-member id ids) + (cond ((null? ids) #f) + ((bound-identifier=? id (car ids)) #t) + ((bound-member (car ids) (cdr ids))))) + + (syntax-case x () + ((_ () b0 b1 ...) + #'(let () b0 b1 ...)) + ((_ ((id val) ...) b0 b1 ...) + (and-map identifier? #'(id ...)) + (if (let lp ((ids #'(id ...))) + (cond ((null? ids) #f) + ((bound-member (car ids) (cdr ids)) #t) + (else (lp (cdr ids))))) + (syntax-violation '@bind "duplicate bound identifier" x) + (with-syntax (((old-v ...) (generate-temporaries #'(id ...))) + ((v ...) (generate-temporaries #'(id ...)))) + #'(let ((old-v id) ... + (v val) ...) + (dynamic-wind + (lambda () + (set! id v) ...) + (lambda () b0 b1 ...) + (lambda () + (set! id old-v) ...))))))))) + + + + +;;; {Defmacros} +;;; + +(define-syntax define-macro + (lambda (x) + "Define a defmacro." + (syntax-case x () + ((_ (macro . args) doc body1 body ...) + (string? (syntax->datum (syntax doc))) + (syntax (define-macro macro doc (lambda args body1 body ...)))) + ((_ (macro . args) body ...) + (syntax (define-macro macro #f (lambda args body ...)))) + ((_ macro doc transformer) + (or (string? (syntax->datum (syntax doc))) + (not (syntax->datum (syntax doc)))) + (syntax + (define-syntax macro + (lambda (y) + doc + (syntax-case y () + ((_ . args) + (let ((v (syntax->datum (syntax args)))) + (datum->syntax y (apply transformer v)))))))))))) + +(define-syntax defmacro + (lambda (x) + "Define a defmacro, with the old lispy defun syntax." + (syntax-case x () + ((_ macro args doc body1 body ...) + (string? (syntax->datum (syntax doc))) + (syntax (define-macro macro doc (lambda args body1 body ...)))) + ((_ macro args body ...) + (syntax (define-macro macro #f (lambda args body ...))))))) + +(provide 'defmacro) + + + +;;; {Deprecation} +;;; +;;; Depends on: defmacro +;;; + +(defmacro begin-deprecated forms + (if (include-deprecated-features) + `(begin ,@forms) + `(begin))) + + + +;;; {Trivial Functions} +;;; + +(define (identity x) x) +(define (and=> value procedure) (and value (procedure value))) +(define call/cc call-with-current-continuation) + +;;; 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 +;;; 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) +;;; ...)) +;;; + +(define (apply-to-args args fn) (apply fn args)) + +(defmacro false-if-exception (expr) + `(catch #t + (lambda () + ;; avoid saving backtraces inside false-if-exception + (with-fluid* the-last-stack (fluid-ref the-last-stack) + (lambda () ,expr))) + (lambda args #f))) + + + +;;; {General Properties} +;;; + +;; This is a more modern interface to properties. It will replace all +;; other property-like things eventually. + +(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))))) + + + +;;; {Symbol Properties} +;;; + +(define (symbol-property sym prop) + (let ((pair (assoc prop (symbol-pref sym)))) + (and pair (cdr pair)))) + +(define (set-symbol-property! sym prop val) + (let ((pair (assoc prop (symbol-pref sym)))) + (if pair + (set-cdr! pair val) + (symbol-pset! sym (acons prop val (symbol-pref sym)))))) + +(define (symbol-property-remove! sym prop) + (let ((pair (assoc prop (symbol-pref sym)))) + (if pair + (symbol-pset! sym (delq! pair (symbol-pref sym)))))) + + + +;;; {Arrays} +;;; + +(define (array-shape a) + (map (lambda (ind) (if (number? ind) (list 0 (+ -1 ind)) ind)) + (array-dimensions a))) + + + +;;; {Keywords} +;;; + +(define (kw-arg-ref args kw) + (let ((rem (member kw args))) + (and rem (pair? (cdr rem)) (cadr rem)))) + + + +;;; {Structs} +;;; + +(define (struct-layout s) + (struct-ref (struct-vtable s) vtable-index-layout)) + + + +;;; {Records} +;;; + +;; Printing records: by default, records are printed as +;; +;; #<type-name field1: val1 field2: val2 ...> +;; +;; You can change that by giving a custom printing function to +;; MAKE-RECORD-TYPE (after the list of field symbols). This function +;; will be called like +;; +;; (<printer> object port) +;; +;; It should print OBJECT to PORT. + +(define (inherit-print-state old-port new-port) + (if (get-print-state old-port) + (port-with-print-state new-port (get-print-state old-port)) + new-port)) + +;; 0: type-name, 1: fields +(define record-type-vtable + (make-vtable-vtable "prpr" 0 + (lambda (s p) + (cond ((eq? s record-type-vtable) + (display "#<record-type-vtable>" p)) + (else + (display "#<record-type " p) + (display (record-type-name s) p) + (display ">" p)))))) + +(define (record-type? obj) + (and (struct? obj) (eq? record-type-vtable (struct-vtable obj)))) + +(define (make-record-type type-name fields . opt) + (let ((printer-fn (and (pair? opt) (car opt)))) + (let ((struct (make-struct record-type-vtable 0 + (make-struct-layout + (apply string-append + (map (lambda (f) "pw") fields))) + (or printer-fn + (lambda (s p) + (display "#<" p) + (display type-name p) + (let loop ((fields fields) + (off 0)) + (cond + ((not (null? fields)) + (display " " p) + (display (car fields) p) + (display ": " p) + (display (struct-ref s off) p) + (loop (cdr fields) (+ 1 off))))) + (display ">" p))) + type-name + (copy-tree fields)))) + ;; Temporary solution: Associate a name to the record type descriptor + ;; so that the object system can create a wrapper class for it. + (set-struct-vtable-name! struct (if (symbol? type-name) + type-name + (string->symbol type-name))) + struct))) + +(define (record-type-name obj) + (if (record-type? obj) + (struct-ref obj vtable-offset-user) + (error 'not-a-record-type obj))) + +(define (record-type-fields obj) + (if (record-type? obj) + (struct-ref obj (+ 1 vtable-offset-user)) + (error 'not-a-record-type obj))) + +(define (record-constructor rtd . opt) + (let ((field-names (if (pair? opt) (car opt) (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))) + (if (not pos) + (error 'no-such-field field-name)) + (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))) + (if (not pos) + (error 'no-such-field field-name)) + (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)))) + +(define (record-type-descriptor obj) + (if (struct? obj) + (struct-vtable obj) + (error 'not-a-record obj))) + +(provide 'record) + + + +;;; {Booleans} +;;; + +(define (->bool x) (not (not x))) + + + +;;; {Symbols} +;;; + +(define (symbol-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))) + + + +;;; {Lists} +;;; + +(define (list-index l k) + (let loop ((n 0) + (l l)) + (and (not (null? l)) + (if (eq? (car l) k) + n + (loop (+ n 1) (cdr l)))))) + + + +(if (provided? 'posix) + (primitive-load-path "ice-9/posix")) + +(if (provided? 'socket) + (primitive-load-path "ice-9/networking")) + +;; For reference, Emacs file-exists-p uses stat in this same way. +(define file-exists? + (if (provided? 'posix) + (lambda (str) + (->bool (stat str #f))) + (lambda (str) + (let ((port (catch 'system-error (lambda () (open-file str OPEN_READ)) + (lambda args #f)))) + (if port (begin (close-port port) #t) + #f))))) + +(define file-is-directory? + (if (provided? 'posix) + (lambda (str) + (eq? (stat:type (stat str)) 'directory)) + (lambda (str) + (let ((port (catch 'system-error + (lambda () (open-file (string-append str "/.") + OPEN_READ)) + (lambda args #f)))) + (if port (begin (close-port port) #t) + #f))))) + +(define (has-suffix? str suffix) + (string-suffix? suffix str)) + +(define (system-error-errno args) + (if (eq? (car args) 'system-error) + (car (list-ref args 4)) + #f)) + + + +;;; {Error Handling} +;;; + +(define (error . args) + (save-stack) + (if (null? args) + (scm-error 'misc-error #f "?" #f #f) + (let loop ((msg "~A") + (rest (cdr args))) + (if (not (null? rest)) + (loop (string-append msg " ~S") + (cdr rest)) + (scm-error 'misc-error #f msg args #f))))) + +;; bad-throw is the hook that is called upon a throw to a an unhandled +;; key (unless the throw has four arguments, in which case +;; it's usually interpreted as an error throw.) +;; If the key has a default handler (a throw-handler-default property), +;; it is applied to the throw. +;; +(define (bad-throw key . args) + (let ((default (symbol-property key 'throw-handler-default))) + (or (and default (apply default key args)) + (apply error "unhandled-exception:" key args)))) + + + +(define (tm:sec obj) (vector-ref obj 0)) +(define (tm:min obj) (vector-ref obj 1)) +(define (tm:hour obj) (vector-ref obj 2)) +(define (tm:mday obj) (vector-ref obj 3)) +(define (tm:mon obj) (vector-ref obj 4)) +(define (tm:year obj) (vector-ref obj 5)) +(define (tm:wday obj) (vector-ref obj 6)) +(define (tm:yday obj) (vector-ref obj 7)) +(define (tm:isdst obj) (vector-ref obj 8)) +(define (tm:gmtoff obj) (vector-ref obj 9)) +(define (tm:zone obj) (vector-ref obj 10)) + +(define (set-tm:sec obj val) (vector-set! obj 0 val)) +(define (set-tm:min obj val) (vector-set! obj 1 val)) +(define (set-tm:hour obj val) (vector-set! obj 2 val)) +(define (set-tm:mday obj val) (vector-set! obj 3 val)) +(define (set-tm:mon obj val) (vector-set! obj 4 val)) +(define (set-tm:year obj val) (vector-set! obj 5 val)) +(define (set-tm:wday obj val) (vector-set! obj 6 val)) +(define (set-tm:yday obj val) (vector-set! obj 7 val)) +(define (set-tm:isdst obj val) (vector-set! obj 8 val)) +(define (set-tm:gmtoff obj val) (vector-set! obj 9 val)) +(define (set-tm:zone obj val) (vector-set! obj 10 val)) + +(define (tms:clock obj) (vector-ref obj 0)) +(define (tms:utime obj) (vector-ref obj 1)) +(define (tms:stime obj) (vector-ref obj 2)) +(define (tms:cutime obj) (vector-ref obj 3)) +(define (tms:cstime obj) (vector-ref obj 4)) + +(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) + (dup->fdes fd/port fd) + (close fd/port) + fd) + (else + (primitive-move->fdes fd/port fd) + (set-port-revealed! fd/port 1) + fd/port))) + +(define (release-port-handle port) + (let ((revealed (port-revealed port))) + (if (> revealed 0) + (set-port-revealed! port (- revealed 1))))) + +(define (dup->port port/fd mode . maybe-fd) + (let ((port (fdopen (apply dup->fdes port/fd maybe-fd) + mode))) + (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)) + +(define (dup->outport port/fd . maybe-fd) + (apply dup->port port/fd "w" maybe-fd)) + +(define (dup port/fd . maybe-fd) + (if (integer? port/fd) + (apply dup->fdes port/fd maybe-fd) + (apply dup->port port/fd (port-mode port/fd) maybe-fd))) + +(define (duplicate-port port modes) + (dup->port port modes)) + +(define (fdes->inport fdes) + (let loop ((rest-ports (fdes->ports fdes))) + (cond ((null? rest-ports) + (let ((result (fdopen fdes "r"))) + (set-port-revealed! result 1) + result)) + ((input-port? (car rest-ports)) + (set-port-revealed! (car rest-ports) + (+ (port-revealed (car rest-ports)) 1)) + (car rest-ports)) + (else + (loop (cdr rest-ports)))))) + +(define (fdes->outport fdes) + (let loop ((rest-ports (fdes->ports fdes))) + (cond ((null? rest-ports) + (let ((result (fdopen fdes "w"))) + (set-port-revealed! result 1) + result)) + ((output-port? (car rest-ports)) + (set-port-revealed! (car rest-ports) + (+ (port-revealed (car rest-ports)) 1)) + (car rest-ports)) + (else + (loop (cdr rest-ports)))))) + +(define (port->fdes port) + (set-port-revealed! port (+ (port-revealed port) 1)) + (fileno port)) + +(define (setenv name value) + (if value + (putenv (string-append name "=" value)) + (putenv name))) + +(define (unsetenv name) + "Remove the entry for NAME from the environment." + (putenv name)) + + + +;;; {Load Paths} +;;; + +;;; Here for backward compatability +;; +(define scheme-file-suffix (lambda () ".scm")) + +(define (in-vicinity vicinity file) + (let ((tail (let ((len (string-length vicinity))) + (if (zero? len) + #f + (string-ref vicinity (- len 1)))))) + (string-append vicinity + (if (or (not tail) + (eq? tail #\/)) + "" + "/") + file))) + + + +;;; {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)))) + "/")) ;; fallback for cygwin etc. + (init-file (in-vicinity home ".guile"))) + (if (file-exists? init-file) + (primitive-load init-file)))) + + + +;;; {The interpreter stack} +;;; + +(defmacro start-stack (tag exp) + `(%start-stack ,tag (lambda () ,exp))) + + + +;;; {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 +;;; name extensions listed in %load-extensions. +(define (load-from-path name) + (start-stack 'load-stack + (primitive-load-path name))) + +(define %load-verbosely #f) +(define (assert-load-verbosity v) (set! %load-verbosely v)) + +(define (%load-announce file) + (if %load-verbosely + (with-output-to-port (current-error-port) + (lambda () + (display ";;; ") + (display "loading ") + (display file) + (newline) + (force-output))))) + +(set! %load-hook %load-announce) + +;;; Returns the .go file corresponding to `name'. Does not search load +;;; paths, only the fallback path. If the .go file is missing or out of +;;; date, and autocompilation is enabled, will try autocompilation, just +;;; as primitive-load-path does internally. primitive-load is +;;; unaffected. Returns #f if autocompilation failed or was disabled. +(define (autocompiled-file-name name) + (catch #t + (lambda () + (let* ((cfn ((@ (system base compile) compiled-file-name) name)) + (scmstat (stat name)) + (gostat (stat cfn #f))) + (if (and gostat (= (stat:mtime gostat) (stat:mtime scmstat))) + cfn + (begin + (if gostat + (format (current-error-port) + ";;; note: source file ~a\n;;; newer than compiled ~a\n" + name cfn)) + (cond + (%load-should-autocompile + (%warn-autocompilation-enabled) + (format (current-error-port) ";;; compiling ~a\n" name) + (let ((cfn ((@ (system base compile) compile-file) name))) + (format (current-error-port) ";;; compiled ~a\n" cfn) + cfn)) + (else #f)))))) + (lambda (k . args) + (format (current-error-port) + ";;; WARNING: compilation of ~a failed:\n;;; key ~a, throw_args ~s\n" + name k args) + #f))) + +(define (load name . reader) + (with-fluid* current-reader (and (pair? reader) (car reader)) + (lambda () + (let ((cfn (autocompiled-file-name name))) + (if cfn + (load-compiled cfn) + (start-stack 'load-stack + (primitive-load name))))))) + + + +;;; {Transcendental Functions} +;;; +;;; Derived from "Transcen.scm", Complex trancendental functions for SCM. +;;; Written by Jerry D. Hedden, (C) FSF. +;;; See the file `COPYING' for terms applying to this program. +;;; + +(define expt + (let ((integer-expt integer-expt)) + (lambda (z1 z2) + (cond ((and (exact? z2) (integer? z2)) + (integer-expt z1 z2)) + ((and (real? z2) (real? z1) (>= z1 0)) + ($expt z1 z2)) + (else + (exp (* z2 (log z1)))))))) + +(define (sinh z) + (if (real? z) ($sinh z) + (let ((x (real-part z)) (y (imag-part z))) + (make-rectangular (* ($sinh x) ($cos y)) + (* ($cosh x) ($sin y)))))) +(define (cosh z) + (if (real? z) ($cosh z) + (let ((x (real-part z)) (y (imag-part z))) + (make-rectangular (* ($cosh x) ($cos y)) + (* ($sinh x) ($sin y)))))) +(define (tanh z) + (if (real? z) ($tanh z) + (let* ((x (* 2 (real-part z))) + (y (* 2 (imag-part z))) + (w (+ ($cosh x) ($cos y)))) + (make-rectangular (/ ($sinh x) w) (/ ($sin y) w))))) + +(define (asinh z) + (if (real? z) ($asinh z) + (log (+ z (sqrt (+ (* z z) 1)))))) + +(define (acosh z) + (if (and (real? z) (>= z 1)) + ($acosh z) + (log (+ z (sqrt (- (* z z) 1)))))) + +(define (atanh z) + (if (and (real? z) (> z -1) (< z 1)) + ($atanh z) + (/ (log (/ (+ 1 z) (- 1 z))) 2))) + +(define (sin z) + (if (real? z) ($sin z) + (let ((x (real-part z)) (y (imag-part z))) + (make-rectangular (* ($sin x) ($cosh y)) + (* ($cos x) ($sinh y)))))) +(define (cos z) + (if (real? z) ($cos z) + (let ((x (real-part z)) (y (imag-part z))) + (make-rectangular (* ($cos x) ($cosh y)) + (- (* ($sin x) ($sinh y))))))) +(define (tan z) + (if (real? z) ($tan z) + (let* ((x (* 2 (real-part z))) + (y (* 2 (imag-part z))) + (w (+ ($cos x) ($cosh y)))) + (make-rectangular (/ ($sin x) w) (/ ($sinh y) w))))) + +(define (asin z) + (if (and (real? z) (>= z -1) (<= z 1)) + ($asin z) + (* -i (asinh (* +i z))))) + +(define (acos z) + (if (and (real? z) (>= z -1) (<= z 1)) + ($acos z) + (+ (/ (angle -1) 2) (* +i (asinh (* +i z)))))) + +(define (atan z . y) + (if (null? y) + (if (real? z) ($atan z) + (/ (log (/ (- +i z) (+ +i z))) +2i)) + ($atan2 z (car y)))) + + + +;;; {Reader Extensions} +;;; +;;; Reader code for various "#c" forms. +;;; + +(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.")))) + + + +;;; {Command Line Options} +;;; + +(define (get-option argv kw-opts kw-args return) + (cond + ((null? argv) + (return #f #f argv)) + + ((or (not (eq? #\- (string-ref (car argv) 0))) + (eq? (string-length (car argv)) 1)) + (return 'normal-arg (car argv) (cdr argv))) + + ((eq? #\- (string-ref (car argv) 1)) + (let* ((kw-arg-pos (or (string-index (car argv) #\=) + (string-length (car argv)))) + (kw (symbol->keyword (substring (car argv) 2 kw-arg-pos))) + (kw-opt? (member kw kw-opts)) + (kw-arg? (member kw kw-args)) + (arg (or (and (not (eq? kw-arg-pos (string-length (car argv)))) + (substring (car argv) + (+ kw-arg-pos 1) + (string-length (car argv)))) + (and kw-arg? + (begin (set! argv (cdr argv)) (car argv)))))) + (if (or kw-opt? kw-arg?) + (return kw arg (cdr argv)) + (return 'usage-error kw (cdr argv))))) + + (else + (let* ((char (substring (car argv) 1 2)) + (kw (symbol->keyword char))) + (cond + + ((member kw kw-opts) + (let* ((rest-car (substring (car argv) 2 (string-length (car argv)))) + (new-argv (if (= 0 (string-length rest-car)) + (cdr argv) + (cons (string-append "-" rest-car) (cdr argv))))) + (return kw #f new-argv))) + + ((member kw kw-args) + (let* ((rest-car (substring (car argv) 2 (string-length (car argv)))) + (arg (if (= 0 (string-length rest-car)) + (cadr argv) + rest-car)) + (new-argv (if (= 0 (string-length rest-car)) + (cddr argv) + (cdr argv)))) + (return kw arg new-argv))) + + (else (return 'usage-error kw argv))))))) + +(define (for-next-option proc argv kw-opts kw-args) + (let loop ((argv argv)) + (get-option argv kw-opts kw-args + (lambda (opt opt-arg argv) + (and opt (proc opt opt-arg argv loop)))))) + +(define (display-usage-report kw-desc) + (for-each + (lambda (kw) + (or (eq? (car kw) #t) + (eq? (car kw) 'else) + (let* ((opt-desc kw) + (help (cadr opt-desc)) + (opts (car opt-desc)) + (opts-proper (if (string? (car opts)) (cdr opts) opts)) + (arg-name (if (string? (car opts)) + (string-append "<" (car opts) ">") + "")) + (left-part (string-append + (with-output-to-string + (lambda () + (map (lambda (x) (display (keyword->symbol x)) (display " ")) + opts-proper))) + arg-name)) + (middle-part (if (and (< (string-length left-part) 30) + (< (string-length help) 40)) + (make-string (- 30 (string-length left-part)) #\ ) + "\n\t"))) + (display left-part) + (display middle-part) + (display help) + (newline)))) + kw-desc)) + + + +(define (transform-usage-lambda cases) + (let* ((raw-usage (delq! 'else (map car cases))) + (usage-sans-specials (map (lambda (x) + (or (and (not (list? x)) x) + (and (symbol? (car x)) #t) + (and (boolean? (car x)) #t) + x)) + raw-usage)) + (usage-desc (delq! #t usage-sans-specials)) + (kw-desc (map car usage-desc)) + (kw-opts (apply append (map (lambda (x) (and (not (string? (car x))) x)) kw-desc))) + (kw-args (apply append (map (lambda (x) (and (string? (car x)) (cdr x))) kw-desc))) + (transmogrified-cases (map (lambda (case) + (cons (let ((opts (car case))) + (if (or (boolean? opts) (eq? 'else opts)) + opts + (cond + ((symbol? (car opts)) opts) + ((boolean? (car opts)) opts) + ((string? (caar opts)) (cdar opts)) + (else (car opts))))) + (cdr case))) + cases))) + `(let ((%display-usage (lambda () (display-usage-report ',usage-desc)))) + (lambda (%argv) + (let %next-arg ((%argv %argv)) + (get-option %argv + ',kw-opts + ',kw-args + (lambda (%opt %arg %new-argv) + (case %opt + ,@ transmogrified-cases)))))))) + + + + +;;; {Low Level Modules} +;;; +;;; 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. +;;; +;;; (make-module size use-list lazy-binding-proc) => module +;;; module-{obarray,uses,binder}[|-set!] +;;; (module? obj) => [#t|#f] +;;; (module-locally-bound? module symbol) => [#t|#f] +;;; (module-bound? module symbol) => [#t|#f] +;;; (module-symbol-locally-interned? module symbol) => [#t|#f] +;;; (module-symbol-interned? module symbol) => [#t|#f] +;;; (module-local-variable module symbol) => [#<variable ...> | #f] +;;; (module-variable module symbol) => [#<variable ...> | #f] +;;; (module-symbol-binding module symbol opt-value) +;;; => [ <obj> | opt-value | an error occurs ] +;;; (module-make-local-var! module symbol) => #<variable...> +;;; (module-add! module symbol var) => unspecified +;;; (module-remove! module symbol) => unspecified +;;; (module-for-each proc module) => unspecified +;;; (make-scm-module) => module ; a lazy copy of the symhash module +;;; (set-current-module module) => unspecified +;;; (current-module) => #<module...> +;;; +;;; + + + +;;; {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 +;; the value stored in the vtable that determines how record are +;; printed. Sigh.) + +(define (%print-module mod port) ; unused args: depth length style table) + (display "#<" port) + (display (or (module-kind mod) "module") port) + (display " " port) + (display (module-name mod) port) + (display " " port) + (display (number->string (object-address mod) 16) port) + (display ">" port)) + +;; module-type +;; +;; A module is characterized by an obarray in which local symbols +;; are interned, a list of modules, "uses", from which non-local +;; bindings can be inherited, and an optional lazy-binder which +;; 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 + duplicates-handlers import-obarray + observers weak-observers) + %print-module)) + +;; make-module &opt size uses binder +;; +;; Create a new module, perhaps with a particular size of obarray, +;; initial uses list, or binding procedure. +;; +(define make-module + (lambda args + + (define (parse-arg index default) + (if (> (length args) index) + (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 31)) + (uses (parse-arg 1 '())) + (binder (parse-arg 2 #f))) + + (if (not (integer? size)) + (error "Illegal size to make-module." size)) + (if (not (and (list? uses) + (and-map module? uses))) + (error "Incorrect use list." uses)) + (if (and binder (not (procedure? binder))) + (error + "Lazy-binder expected to be a procedure or #f." binder)) + + (let ((module (module-constructor (make-hash-table size) + uses binder #f %pre-modules-transformer + #f #f #f + (make-hash-table %default-import-size) + '() + (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 + ;; itself. + (set-module-eval-closure! module (standard-eval-closure module)) + + module)))) + +(define module-constructor (record-constructor module-type)) +(define module-obarray (record-accessor module-type 'obarray)) +(define set-module-obarray! (record-modifier module-type 'obarray)) +(define module-uses (record-accessor module-type 'uses)) +(define set-module-uses! (record-modifier module-type 'uses)) +(define module-binder (record-accessor module-type 'binder)) +(define set-module-binder! (record-modifier module-type 'binder)) + +;; NOTE: This binding is used in libguile/modules.c. +(define module-eval-closure (record-accessor module-type 'eval-closure)) + +(define module-transformer (record-accessor module-type 'transformer)) +(define set-module-transformer! (record-modifier module-type 'transformer)) +;; (define module-name (record-accessor module-type 'name)) wait until mods are booted +(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? (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) + (setter module closure) + ;; Make it possible to lookup the module from the environment. + ;; This implementation is correct since an eval closure can belong + ;; to maximally one module. + + ;; XXX: The following line introduces a circular reference that + ;; precludes garbage collection of modules with the current weak hash + ;; table semantics (see + ;; http://thread.gmane.org/gmane.comp.programming.garbage-collection.boehmgc/2465 + ;; for details). Since it doesn't appear to be used (only in + ;; `scm_lookup_closure_module ()', which has 1 caller), we just comment + ;; it out. + + ;(set-procedure-property! closure 'module module) + ))) + + + +;;; {Observer protocol} +;;; + +(define (module-observe module proc) + (set-module-observers! module (cons proc (module-observers module))) + (cons module proc)) + +(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)) + (id (cdr token))) + (if (integer? id) + (hash-remove! (module-weak-observers module) id) + (set-module-observers! module (delq1! id (module-observers module))))) + *unspecified*) + +(define module-defer-observers #f) +(define module-defer-observers-mutex (make-mutex 'recursive)) +(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)) + + ;; 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))) + + + +;;; {Module Searching in General} +;;; +;;; We sometimes want to look for properties of a symbol +;;; just within the obarray of one module. If the property +;;; holds, then it is said to hold ``locally'' as in, ``The symbol +;;; DISPLAY is locally rebound in the module `safe-guile'.'' +;;; +;;; +;;; Other times, we want to test for a symbol property in the obarray +;;; of M and, if it is not found there, try each of the modules in the +;;; uses list of M. This is the normal way of testing for some +;;; property, so we state these properties without qualification as +;;; in: ``The symbol 'fnord is interned in module M because it is +;;; interned locally in module M2 which is a member of the uses list +;;; of M.'' +;;; + +;; 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. +;; +(define (module-search fn m v) + (define (loop pos) + (and (pair? pos) + (or (module-search fn (car pos) v) + (loop (cdr pos))))) + (or (fn m v) + (loop (module-uses m)))) + + +;;; {Is a symbol bound in a module?} +;;; +;;; Symbol S in Module M is bound if S is interned in M and if the binding +;;; of S in M has been set to some well-defined value. +;;; + +;; module-locally-bound? module symbol +;; +;; Is a symbol bound (interned and defined) locally in a given module? +;; +(define (module-locally-bound? m v) + (let ((var (module-local-variable m v))) + (and var + (variable-bound? var)))) + +;; module-bound? module symbol +;; +;; Is a symbol bound (interned and defined) anywhere in a given module +;; or its uses? +;; +(define (module-bound? m v) + (let ((var (module-variable m v))) + (and var + (variable-bound? var)))) + +;;; {Is a symbol interned in a module?} +;;; +;;; 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 +;;; an initial binding for the corresponding variable. This is done +;;; with: +;;; (module-add! module symbol (make-undefined-variable)) +;;; +;;; In that case, the symbol is interned in the module, but not +;;; bound there. The unbound symbol shadows any binding for that +;;; symbol that might otherwise be inherited from a member of the uses list. +;;; + +(define (module-obarray-get-handle ob key) + ((if (symbol? key) hashq-get-handle hash-get-handle) ob key)) + +(define (module-obarray-ref ob key) + ((if (symbol? key) hashq-ref hash-ref) ob key)) + +(define (module-obarray-set! ob key val) + ((if (symbol? key) hashq-set! hash-set!) ob key val)) + +(define (module-obarray-remove! ob key) + ((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. +;; +(define (module-symbol-locally-interned? m v) + (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. +;; +(define (module-symbol-interned? m v) + (module-search module-symbol-locally-interned? m v)) + + +;;; {Mapping modules x symbols --> variables} +;;; + +;; module-local-variable module symbol +;; return the local variable associated with a MODULE and SYMBOL. +;; +;;; This function is very important. It is the only function that can +;;; return a variable from a module other than the mutators that store +;;; new variables in modules. Therefore, this function is the location +;;; of the "lazy binder" hack. +;;; +;;; If symbol is defined in MODULE, and if the definition binds symbol +;;; to a variable, return that variable object. +;;; +;;; If the symbols is not found at first, but the module has a lazy binder, +;;; then try the binder. +;;; +;;; If the symbol is not found at all, return #f. +;;; +;;; (This is now written in C, see `modules.c'.) +;;; + +;;; {Mapping modules x symbols --> bindings} +;;; +;;; These are similar to the mapping to variables, except that the +;;; variable is dereferenced. +;;; + +;; 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, +;; return OPT-VALUE. +;; +(define (module-symbol-local-binding m v . opt-val) + (let ((var (module-local-variable m v))) + (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, +;; return OPT-VALUE. +;; +(define (module-symbol-binding m v . opt-val) + (let ((var (module-variable m v))) + (if (and var (variable-bound? var)) + (variable-ref var) + (if (not (null? opt-val)) + (car opt-val) + (error "Unbound variable." v))))) + + + + +;;; {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))) + + ;; 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) + (if (not (variable? var)) + (error "Bad variable to module-add!" var)) + (module-obarray-set! (module-obarray m) v var) + (module-modified m)) + +;; 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-modified m)) + +(define (module-clear! 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) + (hash-for-each proc (module-obarray module))) + +(define (module-map proc module) + (hash-map->list proc (module-obarray module))) + + + +;;; {Low Level Bootstrapping} +;;; + +;; make-root-module + +;; 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. +;; +;; (The obarray continues to be used by code that has been closed over +;; before the module system has been booted.) + +(define (make-root-module) + (let ((m (make-module 0))) + (set-module-obarray! m (%get-pre-modules-obarray)) + m)) + +;; make-scm-module + +;; 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) + (let ((m (make-module 0))) + (set-module-obarray! m (%get-pre-modules-obarray)) + (set-module-eval-closure! m (standard-interface-eval-closure m)) + m)) + + + + +;;; {Module-based Loading} +;;; + +(define (save-module-excursion thunk) + (let ((inner-module (current-module)) + (outer-module #f)) + (dynamic-wind (lambda () + (set! outer-module (current-module)) + (set-current-module inner-module) + (set! inner-module #f)) + thunk + (lambda () + (set! inner-module (current-module)) + (set-current-module outer-module) + (set! outer-module #f))))) + +(define basic-load load) + +(define (load-module filename . reader) + (save-module-excursion + (lambda () + (let ((oldname (and (current-load-port) + (port-filename (current-load-port))))) + (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))))) + + + + +;;; {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)) + (variable-ref variable) + (if (null? rest) + (error "No variable named" name 'in module) + (car rest) ; default value + )))) + +;; MODULE-SET! -- exported +;; +;; 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 + (variable-set! variable value) + (error "No variable named" name 'in module)))) + +;; MODULE-DEFINE! -- exported +;; +;; 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)) + (let ((variable (make-variable value))) + (module-add! module name variable))))) + +;; MODULE-DEFINED? -- exported +;; +;; Return #t iff NAME is defined in MODULE (or in a module that MODULE +;; uses) +;; +(define (module-defined? module name) + (let ((variable (module-variable module name))) + (and variable (variable-bound? variable)))) + +;; MODULE-USE! module interface +;; +;; Add INTERFACE to the list of interfaces used by MODULE. +;; +(define (module-use! module interface) + (if (not (or (eq? module interface) + (memq interface (module-uses module)))) + (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 + (append (module-uses module) interfaces)) + (module-modified module)) + + + +;;; {Recursive Namespaces} +;;; +;;; A hierarchical namespace emerges if we consider some module to be +;;; root, and variables bound to modules as nested namespaces. +;;; +;;; The routines in this file manage variable names in hierarchical namespace. +;;; Each variable name is a list of elements, looked up in successively nested +;;; modules. +;;; +;;; (nested-ref some-root-module '(foo bar baz)) +;;; => <value of a variable named baz in the module bound to bar in +;;; the module bound to foo in some-root-module> +;;; +;;; +;;; There are: +;;; +;;; ;; a-root is a module +;;; ;; name is a list of symbols +;;; +;;; nested-ref a-root name +;;; nested-set! a-root name val +;;; nested-define! a-root name val +;;; nested-remove! a-root name +;;; +;;; +;;; (current-module) is a natural choice for a-root so for convenience there are +;;; also: +;;; +;;; local-ref name == nested-ref (current-module) name +;;; local-set! name val == nested-set! (current-module) name val +;;; local-define! name val == nested-define! (current-module) name val +;;; local-remove! name == nested-remove! (current-module) name +;;; + + +(define (nested-ref root names) + (let loop ((cur root) + (elts names)) + (cond + ((null? elts) cur) + ((not (module? cur)) #f) + (else (loop (module-ref cur (car elts) #f) (cdr elts)))))) + +(define (nested-set! root names val) + (let loop ((cur root) + (elts names)) + (if (null? (cdr elts)) + (module-set! cur (car elts) val) + (loop (module-ref cur (car elts)) (cdr elts))))) + +(define (nested-define! root names val) + (let loop ((cur root) + (elts names)) + (if (null? (cdr elts)) + (module-define! cur (car elts) val) + (loop (module-ref cur (car elts)) (cdr elts))))) + +(define (nested-remove! root names) + (let loop ((cur root) + (elts names)) + (if (null? (cdr elts)) + (module-remove! cur (car elts)) + (loop (module-ref cur (car elts)) (cdr elts))))) + +(define (local-ref names) (nested-ref (current-module) names)) +(define (local-set! names val) (nested-set! (current-module) names val)) +(define (local-define names val) (nested-define! (current-module) names val)) +(define (local-remove names) (nested-remove! (current-module) names)) + + + + +;;; {The (%app) module} +;;; +;;; The root of conventionally named objects not directly in the top level. +;;; +;;; (%app modules) +;;; (%app modules guile) +;;; +;;; The directory of all modules and the standard root module. +;;; + +;; 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) + (set-procedure-property! (module-eval-closure m) 'system-module 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 '(guile)) +(set-module-name! the-scm-module '(guile)) +(set-module-kind! the-scm-module 'interface) +(set-system-module! the-root-module #t) +(set-system-module! the-scm-module #t) + +;; NOTE: This binding is used in libguile/modules.c. +;; +(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 (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) + (eq? interface module)) + (let ((interface (make-module 31))) + (set-module-name! interface (module-name module)) + (set-module-kind! interface 'interface) + (set-module-public-interface! module interface)))) + (if (and (not (memq the-scm-module (module-uses module))) + (not (eq? module the-root-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 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)) +(set-module-name! %app '(%app)) +(define app %app) ;; for backwards compatability + +(let ((m (make-module 31))) + (set-module-name! m '()) + (local-define '(%app modules) m)) +(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) +;; definition deferred for syncase's benefit. +(define module-name + (let ((accessor (record-accessor module-type 'name))) + (lambda (mod) + (or (accessor mod) + (let ((name (list (gensym)))) + ;; Name MOD and bind it in THE-ROOT-MODULE so that it's visible + ;; to `resolve-module'. This is important as `psyntax' stores + ;; module names and relies on being able to `resolve-module' + ;; them. + (set-module-name! mod name) + (nested-define! the-root-module `(%app modules ,@name) mod) + (accessor mod)))))) + +;; (define-special-value '(%app modules new-ws) (lambda () (make-scm-module))) + +(define (try-load-module name) + (try-module-autoload name)) + +(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)) + (unrecognized (lambda (arg) + (error "unrecognized define-module argument" arg)))) + (beautify-user-module! module) + (let loop ((kws kws) + (reversed-interfaces '()) + (exports '()) + (re-exports '()) + (replacements '()) + (autoloads '())) + + (if (null? 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)) + (cond + ((equal? (caadr kws) '(ice-9 syncase)) + (issue-deprecation-warning + "(ice-9 syncase) is deprecated. Support for syntax-case is now in Guile core.") + (loop (cddr kws) + reversed-interfaces + exports + re-exports + replacements + autoloads)) + (else + (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)) + + + +;;; {Autoload} +;;; + +(define (make-autoload-interface module name bindings) + (let ((b (lambda (a sym definep) + (and (memq sym bindings) + (let ((i (module-public-interface (resolve-module name)))) + (if (not i) + (error "missing interface for module" name)) + (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 (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))))))) + + + + +;;; {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 (symbol->string (car reverse-name))) + (dir-hint-module-name (reverse (cdr reverse-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)) + (dynamic-wind + (lambda () (autoload-in-progress! dir-hint name)) + (lambda () + (with-fluid* current-reader #f + (lambda () + (save-module-excursion + (lambda () + (primitive-load-path (in-vicinity dir-hint name) #f) + (set! didit #t)))))) + (lambda () (set-autoloaded! dir-hint name didit))) + didit)))) + + + +;;; {Dynamic linking of modules} +;;; + +(define autoloads-done '((guile . guile))) + +(define (autoload-done-or-in-progress? p m) + (let ((n (cons p m))) + (->bool (or (member n autoloads-done) + (member n autoloads-in-progress))))) + +(define (autoload-done! p m) + (let ((n (cons p m))) + (set! autoloads-in-progress + (delete! n autoloads-in-progress)) + (or (member n autoloads-done) + (set! autoloads-done (cons n autoloads-done))))) + +(define (autoload-in-progress! p m) + (let ((n (cons p m))) + (set! autoloads-done + (delete! n autoloads-done)) + (set! autoloads-in-progress (cons n autoloads-in-progress)))) + +(define (set-autoloaded! p m done?) + (if done? + (autoload-done! p m) + (let ((n (cons p m))) + (set! autoloads-done (delete! n autoloads-done)) + (set! autoloads-in-progress (delete! n autoloads-in-progress))))) + + + +;;; {Run-time options} +;;; + +(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 + (,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!))) + + + +;;; {Running Repls} +;;; + +(define (repl read evaler print) + (let loop ((source (read (current-input-port)))) + (print (evaler source)) + (loop (read (current-input-port))))) + +;; A provisional repl that acts like the SCM repl: +;; +(define scm-repl-silent #f) +(define (assert-repl-silence v) (set! scm-repl-silent v)) + +(define *unspecified* (if #f #f)) +(define (unspecified? v) (eq? v *unspecified*)) + +(define scm-repl-print-unspecified #f) +(define (assert-repl-print-unspecified v) (set! scm-repl-print-unspecified v)) + +(define scm-repl-verbose #f) +(define (assert-repl-verbosity v) (set! scm-repl-verbose v)) + +(define scm-repl-prompt "guile> ") + +(define (set-repl-prompt! v) (set! scm-repl-prompt v)) + +(define (default-pre-unwind-handler key . args) + (save-stack 1) + (apply throw key args)) + +(begin-deprecated + (define (pre-unwind-handler-dispatch key . args) + (apply default-pre-unwind-handler key args))) + +(define abort-hook (make-hook)) + +;; these definitions are used if running a script. +;; otherwise redefined in error-catching-loop. +(define (set-batch-mode?! arg) #t) +(define (batch-mode?) #t) + +(define (error-catching-loop thunk) + (let ((status #f) + (interactive #t)) + (define (loop first) + (let ((next + (catch #t + + (lambda () + (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) + (set! status args) + #f) + + ((switch-repl) + (apply throw 'switch-repl args)) + + ((abort) + ;; This is one of the closures that require + ;; (set! first #f) above + ;; + (lambda () + (run-hook abort-hook) + (force-output (current-output-port)) + (display "ABORT: " (current-error-port)) + (write args (current-error-port)) + (newline (current-error-port)) + (if interactive + (begin + (if (and + (not has-shown-debugger-hint?) + (not (memq 'backtrace + (debug-options-interface))) + (stack? (fluid-ref the-last-stack))) + (begin + (newline (current-error-port)) + (display + "Type \"(backtrace)\" to get more information or \"(debug)\" to enter the debugger.\n" + (current-error-port)) + (set! has-shown-debugger-hint? #t))) + (force-output (current-error-port))) + (begin + (primitive-exit 1))) + (set! stack-saved? #f))) + + (else + ;; This is the other cons-leak closure... + (lambda () + (cond ((= (length args) 4) + (apply handle-system-error key args)) + (else + (apply bad-throw key args))))))) + + default-pre-unwind-handler))) + + (if next (loop next) status))) + (set! set-batch-mode?! (lambda (arg) + (cond (arg + (set! interactive #f) + (restore-signals)) + (#t + (error "sorry, not implemented"))))) + (set! batch-mode? (lambda () (not interactive))) + (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)) +(define stack-saved? #f) + +(define (save-stack . narrowing) + (or stack-saved? + (cond ((not (memq 'debug (debug-options-interface))) + (fluid-set! the-last-stack #f) + (set! stack-saved? #t)) + (else + (fluid-set! + the-last-stack + (case (stack-id #t) + ((repl-stack) + (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) + (apply make-stack #t save-stack tk-stack-mark #t 0 narrowing)) + ((#t) + (apply make-stack #t save-stack 0 1 narrowing)) + (else + (let ((id (stack-id #t))) + (and (procedure? id) + (apply make-stack #t save-stack id #t 0 narrowing)))))) + (set! stack-saved? #t))))) + +(define before-error-hook (make-hook)) +(define after-error-hook (make-hook)) +(define before-backtrace-hook (make-hook)) +(define after-backtrace-hook (make-hook)) + +(define has-shown-debugger-hint? #f) + +(define (handle-system-error key . args) + (let ((cep (current-error-port))) + (cond ((not (stack? (fluid-ref the-last-stack)))) + ((memq 'backtrace (debug-options-interface)) + (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) + (force-output cep) + (throw 'abort key))) + +(define (quit . args) + (apply throw 'quit args)) + +(define exit quit) + +;;(define has-shown-backtrace-hint? #f) Defined by scm_init_backtrace () + +;; Replaced by C code: +;;(define (backtrace) +;; (if (fluid-ref the-last-stack) +;; (begin +;; (newline) +;; (display-backtrace (fluid-ref the-last-stack) (current-output-port)) +;; (newline) +;; (if (and (not has-shown-backtrace-hint?) +;; (not (memq 'backtrace (debug-options-interface)))) +;; (begin +;; (display +;;"Type \"(debug-enable 'backtrace)\" if you would like a backtrace +;;automatically if an error occurs in the future.\n") +;; (set! has-shown-backtrace-hint? #t)))) +;; (display "No backtrace available.\n"))) + +(define (error-catching-repl r e p) + (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 (if (string? prompt) prompt (prompt))) + (force-output) + (run-hook before-read-hook) + ((or (fluid-ref current-reader) read) (current-input-port)))) + +(define (scm-style-repl) + + (letrec ( + (start-gc-rt #f) + (start-rt #f) + (repl-report-start-timing (lambda () + (set! start-gc-rt (gc-run-time)) + (set! start-rt (get-internal-run-time)))) + (repl-report (lambda () + (display ";;; ") + (display (inexact->exact + (* 1000 (/ (- (get-internal-run-time) start-rt) + internal-time-units-per-second)))) + (display " msec (") + (display (inexact->exact + (* 1000 (/ (- (gc-run-time) start-gc-rt) + internal-time-units-per-second)))) + (display " msec in gc)\n"))) + + (consume-trailing-whitespace + (lambda () + (let ((ch (peek-char))) + (cond + ((eof-object? ch)) + ((or (char=? ch #\space) (char=? ch #\tab)) + (read-char) + (consume-trailing-whitespace)) + ((char=? ch #\newline) + (read-char)))))) + (-read (lambda () + (let ((val + (let ((prompt (cond ((string? scm-repl-prompt) + scm-repl-prompt) + ((thunk? scm-repl-prompt) + (scm-repl-prompt)) + (scm-repl-prompt "> ") + (else "")))) + (repl-reader prompt)))) + + ;; As described in R4RS, the READ procedure updates the + ;; port to point to the first character past the end of + ;; the external representation of the object. This + ;; means that it doesn't consume the newline typically + ;; found after an expression. This means that, when + ;; debugging Guile with GDB, GDB gets the newline, which + ;; it often interprets as a "continue" command, making + ;; breakpoints kind of useless. So, consume any + ;; trailing newline here, as well as any whitespace + ;; before it. + ;; But not if EOF, for control-D. + (if (not (eof-object? val)) + (consume-trailing-whitespace)) + (run-hook after-read-hook) + (if (eof-object? val) + (begin + (repl-report-start-timing) + (if scm-repl-verbose + (begin + (newline) + (display ";;; EOF -- quitting") + (newline))) + (quit 0))) + val))) + + (-eval (lambda (sourc) + (repl-report-start-timing) + (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 (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 + (begin + (display ";;; QUIT executed, repl exitting") + (newline) + (repl-report))) + args)) + + (-abort (lambda () + (if scm-repl-verbose + (begin + (display ";;; ABORT executed.") + (newline) + (repl-report))) + (repl -read -eval -print)))) + + (let ((status (error-catching-repl -read + -eval + -print))) + (-quit status)))) + + + + +;;; {IOTA functions: generating lists of numbers} +;;; + +(define (iota n) + (let loop ((count (1- n)) (result '())) + (if (< count 0) result + (loop (1- count) (cons count result))))) + + + +;;; {collect} +;;; +;;; Similar to `begin' but returns a list of the results of all constituent +;;; 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)) + + + +;;; {with-fluids} +;;; + +;; with-fluids is a convenience wrapper for the builtin procedure +;; `with-fluids*'. The syntax is just like `let': +;; +;; (with-fluids ((fluid val) +;; ...) +;; body) + +(defmacro with-fluids (bindings . body) + (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))))) + +;;; {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))))))) + + + + +;;; {Module System Macros} +;;; + +;; Return a list of expressions that evaluate to the appropriate +;; arguments for resolve-interface according to SPEC. + +(eval-when + (compile) + (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 + `(eval-when + (eval load compile) + (let ((m (process-define-module + (list ,@(compile-define-module-args args))))) + (set-current-module m) + m))) + +;; 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 + `(eval-when + (eval load compile) + (process-use-modules + (list ,@(map (lambda (m) + `(list ,@(compile-interface-spec m))) + modules))) + *unspecified*)) + +(defmacro use-syntax (spec) + `(eval-when + (eval load compile) + (issue-deprecation-warning + "`use-syntax' is deprecated. Please contact guile-devel for more info.") + (process-use-modules (list (list ,@(compile-interface-spec spec)))) + *unspecified*)) + +(define-syntax define-private + (syntax-rules () + ((_ foo bar) + (define foo bar)))) + +(define-syntax define-public + (syntax-rules () + ((_ (name . args) . body) + (define-public name (lambda args . body))) + ((_ name val) + (begin + (define name val) + (export name))))) + +(define-syntax defmacro-public + (syntax-rules () + ((_ name args . body) + (begin + (defmacro name args . body) + (export-syntax name))))) + +;; 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 + `(call-with-deferred-observers + (lambda () + (module-export! (current-module) ',names)))) + +(defmacro re-export names + `(call-with-deferred-observers + (lambda () + (module-re-export! (current-module) ',names)))) + +(defmacro export-syntax names + `(export ,@names)) + +(defmacro re-export-syntax names + `(re-export ,@names)) + +(define load load-module) + + + +;;; {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))))) + + + +;;; {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))) + + + +;;; {`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-macro (cond-expand . clauses) + (let ((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 (current-module)))) + (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))) + + + +;;; 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))))) + + + +;;; {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) + (and (provided? 'debug-extensions) + (debug-enable 'backtrace)) + (named-module-use! '(guile-user) '(ice-9 emacs))) + + + +(define using-readline? + (let ((using-readline? (make-fluid))) + (make-procedure-with-setter + (lambda () (fluid-ref using-readline?)) + (lambda (v) (fluid-set! using-readline? v))))) + +(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)) + + + +;;; {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")) + + + +;;; Place the user in the guile-user module. +;;; + +;;; FIXME: annotate ? +;; (define (syncase exp) +;; (with-fluids ((expansion-eval-closure +;; (module-eval-closure (current-module)))) +;; (deannotate/source-properties (sc-expand (annotate exp))))) + +(define-module (guile-user) + #:autoload (system base compile) (compile)) + +;;; boot-9.scm ends here |