From 2d30daecad657d692a7f3cb66deb496630362600 Mon Sep 17 00:00:00 2001 From: Jose Antonio Ortega Ruiz Date: Mon, 24 May 2010 00:03:30 +0200 Subject: Racket: PLT implementation renamed to Racket. --- scheme/racket/geiser.rkt | 22 ++++ scheme/racket/geiser/autodoc.rkt | 189 +++++++++++++++++++++++++++++++++++ scheme/racket/geiser/completions.rkt | 31 ++++++ scheme/racket/geiser/enter.rkt | 103 +++++++++++++++++++ scheme/racket/geiser/eval.rkt | 81 +++++++++++++++ scheme/racket/geiser/locations.rkt | 54 ++++++++++ scheme/racket/geiser/main.rkt | 47 +++++++++ scheme/racket/geiser/modules.rkt | 150 +++++++++++++++++++++++++++ scheme/racket/geiser/user.rkt | 56 +++++++++++ scheme/racket/geiser/utils.rkt | 27 +++++ 10 files changed, 760 insertions(+) create mode 100644 scheme/racket/geiser.rkt create mode 100644 scheme/racket/geiser/autodoc.rkt create mode 100644 scheme/racket/geiser/completions.rkt create mode 100644 scheme/racket/geiser/enter.rkt create mode 100644 scheme/racket/geiser/eval.rkt create mode 100644 scheme/racket/geiser/locations.rkt create mode 100644 scheme/racket/geiser/main.rkt create mode 100644 scheme/racket/geiser/modules.rkt create mode 100644 scheme/racket/geiser/user.rkt create mode 100644 scheme/racket/geiser/utils.rkt (limited to 'scheme/racket') diff --git a/scheme/racket/geiser.rkt b/scheme/racket/geiser.rkt new file mode 100644 index 0000000..45d1289 --- /dev/null +++ b/scheme/racket/geiser.rkt @@ -0,0 +1,22 @@ +;;; geiser.rkt -- entry point + +;; Copyright (C) 2009, 2010 Jose Antonio Ortega Ruiz + +;; This program is free software; you can redistribute it and/or +;; modify it under the terms of the Modified BSD License. You should +;; have received a copy of the license along with this program. If +;; not, see . + +;; Start date: Sat Apr 25, 2009 22:36 + +;;; Code: + +(require version/utils) +(unless (version<=? "5.0" (version)) + (error 'geiser + "Racket version 5.0 or better required (found ~a)" + (version))) + +(require geiser/user) + +;;; geiser.rkt ends here diff --git a/scheme/racket/geiser/autodoc.rkt b/scheme/racket/geiser/autodoc.rkt new file mode 100644 index 0000000..0bb850d --- /dev/null +++ b/scheme/racket/geiser/autodoc.rkt @@ -0,0 +1,189 @@ +;;; autodoc.rkt -- suport for autodoc echo + +;; Copyright (C) 2009, 2010 Jose Antonio Ortega Ruiz + +;; This program is free software; you can redistribute it and/or +;; modify it under the terms of the Modified BSD License. You should +;; have received a copy of the license along with this program. If +;; not, see . + +;; Start date: Sun May 03, 2009 14:45 + +#lang racket + +(provide autodoc update-signature-cache get-help) + +(require geiser/utils geiser/modules geiser/locations scheme/help) + +(define (get-help symbol mod) + (with-handlers ((exn? (lambda (_) + (eval `(help ,symbol))))) + (eval `(help ,symbol #:from ,(ensure-module-spec mod))))) + +(define (autodoc ids) + (if (not (list? ids)) + '() + (map (lambda (id) (or (autodoc* id) (list id))) ids))) + +(define (autodoc* id) + (and + (symbol? id) + (let* ((loc (symbol-location* id)) + (name (car loc)) + (path (cdr loc)) + (sgns (and path (find-signatures path name id))) + (sgns (and sgns (if (list? sgns) sgns '())))) + (and sgns + `(,id + (name . ,name) + (args ,@(map format-signature sgns)) + (module . ,(module-path-name->name path))))))) + +(define (format-signature sign) + (if (signature? sign) + `((required ,@(signature-required sign)) + (optional ,@(signature-optional sign) + ,@(let ((rest (signature-rest sign))) + (if rest (list "...") '()))) + (key ,@(signature-keys sign))) + '())) + +(define signatures (make-hash)) + +(define-struct signature (required optional keys rest)) + +(define (find-signatures path name local-name) + (let ((path (if (path? path) (path->string path) path))) + (hash-ref! (hash-ref! signatures + path + (lambda () (parse-signatures path))) + name + (lambda () (infer-signatures local-name))))) + +(define (parse-signatures path) + (let ((result (make-hasheq))) + (with-handlers ((exn? (lambda (e) result))) + (with-input-from-file path + (lambda () + (parameterize ((read-accept-reader #t)) + (let loop ((stx (read-syntax path))) + (cond ((eof-object? stx) void) + ((syntax->datum stx) => + (lambda (datum) + (parse-datum! datum result) + (loop (read-syntax path)))) + (else void))))))) + result)) + +(define (parse-datum! datum store) + (with-handlers ((exn? (lambda (_) void))) + (match datum + (`(module ,name ,lang (#%module-begin . ,forms)) + (for-each (lambda (f) (parse-datum! f store)) forms)) + (`(module ,name ,lang . ,forms) + (for-each (lambda (f) (parse-datum! f store)) forms)) + (`(define ((,name . ,formals) . ,_) . ,_) + (add-signature! name formals store)) + (`(define (,name . ,formals) . ,_) + (add-signature! name formals store)) + (`(define ,name (lambda ,formals . ,_)) + (add-signature! name formals store)) + (`(define ,name (case-lambda ,clauses ...)) + (for-each (lambda (c) (add-signature! name (car c) store)) + (reverse clauses))) + (`(define-for-syntax (,name . ,formals) . ,_) + (add-signature! name formals store)) + (`(define-for-syntax ,name (lambda ,formals . ,_)) + (add-signature! name formals store)) + (`(define-syntax-rule (,name . ,formals) . ,_) + (add-signature! name formals store)) + (`(define-syntax ,name (syntax-rules ,specials . ,clauses)) + (for-each (lambda (c) (add-signature! name (cdar c) store)) + (reverse clauses))) + (`(define-syntax ,name (lambda ,_ (syntax-case ,_ . ,clauses))) + (for-each (lambda (c) (add-signature! name (cdar c) store)) + (reverse clauses))) + (_ void)))) + +(define (add-signature! name formals store) + (when (symbol? name) + (hash-set! store + name + (cons (parse-formals formals) + (hash-ref store name '()))))) + +(define (parse-formals formals) + (let loop ((formals formals) (req '()) (opt '()) (keys '())) + (cond ((null? formals) + (make-signature (reverse req) (reverse opt) (reverse keys) #f)) + ((symbol? formals) + (make-signature (reverse req) (reverse opt) + (reverse keys) formals)) + ((pair? (car formals)) (loop (cdr formals) + req + (cons (car formals) opt) + keys)) + ((keyword? (car formals)) (let* ((kname + (keyword->symbol (car formals))) + (arg-id (cadr formals)) + (name (if (pair? arg-id) + (list kname + (cadr arg-id)) + kname))) + (loop (cddr formals) + req + opt + (cons name keys)))) + (else (loop (cdr formals) (cons (car formals) req) opt keys))))) + +(define (infer-signatures name) + (define syntax-tag (cons 1 0)) + (define error-tag (cons 1 1)) + (define generic-signature (make-signature '(...) '() '() #f)) + (let ((value (with-handlers ((exn:fail:syntax? (lambda (_) syntax-tag)) + (exn:fail:contract:variable? (lambda (_) + error-tag))) + (namespace-variable-value name)))) + (cond ((procedure? value) (arity->signatures (procedure-arity value))) + ((eq? value syntax-tag) (list generic-signature)) + ((eq? value error-tag) #f) + (else 'variable)))) + +(define (arity->signatures arity) + (define (args fst count) + (let* ((letts (list->vector '(#\x #\y #\z #\u #\v #\w #\r #\s))) + (len (vector-length letts)) + (lett (lambda (n) (vector-ref letts (modulo n len))))) + (map (lambda (n) (string->symbol (format "~a" (lett n)))) + (build-list count (lambda (n) (+ n fst)))))) + (define (arity->signature arity) + (cond ((number? arity) + (make-signature (args 0 arity) '() '() #f)) + ((arity-at-least? arity) + (make-signature (args 0 (arity-at-least-value arity)) + '() '() 'rest)))) + (define (conseq? lst) + (cond ((< (length lst) 2) (number? (car lst))) + ((and (number? (car lst)) + (number? (cadr lst)) + (eqv? (+ 1 (car lst)) (cadr lst))) + (conseq? (cdr lst))) + (else #f))) + (cond ((and (list? arity) (conseq? arity)) + (let ((mi (apply min arity)) + (ma (apply max arity))) + (list (make-signature (args 0 mi) (args mi (- ma mi)) '() #f)))) + ((list? arity) (map arity->signature arity)) + (else (list (arity->signature arity))))) + +(define (update-signature-cache path . form) + (when (and (string? path) + (or (null? form) + (and (list? (car form)) + (not (null? (car form))) + (memq (caar form) + '(define-syntax-rule + define-syntax define set! define-struct))))) + (hash-remove! signatures path))) + +;;; autodoc.rkt ends here diff --git a/scheme/racket/geiser/completions.rkt b/scheme/racket/geiser/completions.rkt new file mode 100644 index 0000000..4cbc09f --- /dev/null +++ b/scheme/racket/geiser/completions.rkt @@ -0,0 +1,31 @@ +;;; completions.rkt -- completion support + +;; Copyright (C) 2009, 2010 Jose Antonio Ortega Ruiz + +;; This program is free software; you can redistribute it and/or +;; modify it under the terms of the Modified BSD License. You should +;; have received a copy of the license along with this program. If +;; not, see . + +;; Start date: Sun Apr 26, 2009 19:02 + +#lang racket + +(provide symbol-completions + module-completions) + +(require srfi/13 geiser/utils geiser/modules) + +(define (filter-prefix prefix lst sort?) + (filter (lambda (s) (string-prefix? prefix s)) + (if sort? (sort lst stringstring (namespace-mapped-symbols)) + #t)) + +(define (module-completions prefix) + (filter-prefix prefix (module-list) #f)) + +;;; completions.rkt ends here diff --git a/scheme/racket/geiser/enter.rkt b/scheme/racket/geiser/enter.rkt new file mode 100644 index 0000000..eff37f6 --- /dev/null +++ b/scheme/racket/geiser/enter.rkt @@ -0,0 +1,103 @@ +;;; enter.rkt -- custom module loaders + +;; Copyright (C) 2010 Jose Antonio Ortega Ruiz + +;; This program is free software; you can redistribute it and/or +;; modify it under the terms of the Modified BSD License. You should +;; have received a copy of the license along with this program. If +;; not, see . + +;; Start date: Wed Mar 31, 2010 21:53 + +#lang racket/base + +(require syntax/modcode + (for-syntax scheme/base)) + +(provide get-namespace enter-module module-loader module-loaded?) + +(define-struct mod (name timestamp depends)) + +(define loaded (make-hash)) + +(define (module-loaded? path) + (with-handlers ((exn? (lambda (_) #f))) + (let ((rp (module-path-index-resolve (module-path-index-join path #f)))) + (hash-has-key? loaded (resolved-module-path-name rp))))) + +(define (enter-module mod) + (dynamic-require mod #f) + (check-latest mod)) + +(define (module-loader orig) + (enter-load/use-compiled orig #f)) + +(define (notify re? path) + (when re? + (fprintf (current-error-port) " [re-loading ~a]\n" path))) + +(define inhibit-eval (make-parameter #f)) + +(define (get-namespace mod) + (parameterize ([inhibit-eval #t]) + (module->namespace mod))) + +(define ((enter-load/use-compiled orig re?) path name) + (when (inhibit-eval) + (raise (make-exn:fail "namespace not found" + (current-continuation-marks)))) + (if name + ;; Module load: + (let ([code (get-module-code path "compiled" compile + (lambda (ext loader?) + (load-extension ext) + #f) + #:notify (lambda (chosen) + (notify re? chosen)))] + [path (normal-case-path + (simplify-path + (path->complete-path path + (or (current-load-relative-directory) + (current-directory)))))]) + ;; Record module timestamp and dependencies: + (let ([mod (make-mod name + (get-timestamp path) + (if code + (apply append + (map cdr (module-compiled-imports code))) + null))]) + (hash-set! loaded path mod)) + ;; Evaluate the module: + (eval code)) + ;; Not a module: + (begin + (notify re? path) + (orig path name)))) + +(define (get-timestamp path) + (file-or-directory-modify-seconds path #f (lambda () -inf.0))) + +(define (check-latest mod) + (let ([mpi (module-path-index-join mod #f)] + [done (make-hash)]) + (let loop ([mpi mpi]) + (let* ([rpath (module-path-index-resolve mpi)] + [path (resolved-module-path-name rpath)]) + (when (path? path) + (let ([path (normal-case-path path)]) + (unless (hash-ref done path #f) + (hash-set! done path #t) + (let ([mod (hash-ref loaded path #f)]) + (when mod + (for-each loop (mod-depends mod)) + (let ([ts (get-timestamp path)]) + (when (ts . > . (mod-timestamp mod)) + (let ([orig (current-load/use-compiled)]) + (parameterize ([current-load/use-compiled + (enter-load/use-compiled orig #f)] + [current-module-declare-name rpath]) + ((enter-load/use-compiled orig #t) + path + (mod-name mod))))))))))))))) + +;;; enter.rkt ends here diff --git a/scheme/racket/geiser/eval.rkt b/scheme/racket/geiser/eval.rkt new file mode 100644 index 0000000..e0bcffa --- /dev/null +++ b/scheme/racket/geiser/eval.rkt @@ -0,0 +1,81 @@ +;;; eval.rkt -- evaluation + +;; Copyright (C) 2009, 2010 Jose Antonio Ortega Ruiz + +;; This program is free software; you can redistribute it and/or +;; modify it under the terms of the Modified BSD License. You should +;; have received a copy of the license along with this program. If +;; not, see . + +;; Start date: Sun Apr 26, 2009 00:44 + +#lang racket + +(provide eval-in + compile-in + load-file + compile-file + macroexpand + make-repl-reader) + +(require scheme/enter geiser/modules geiser/autodoc) + +(define last-result (void)) + +(define namespace->module-name + (compose module-path-name->name namespace->module-path-name)) + +(define last-namespace (make-parameter (current-namespace))) + +(define (exn-key e) + (vector-ref (struct->vector e) 0)) + +(define (set-last-error e) + (set! last-result `((error (key . ,(exn-key e))))) + (display (exn-message e))) + +(define (write-value v) + (with-output-to-string + (lambda () (write v)))) + +(define (set-last-result . vs) + (set! last-result `((result ,@(map write-value vs))))) + +(define (call-with-result thunk) + (set-last-result (void)) + (let ((output + (with-output-to-string + (lambda () + (with-handlers ((exn? set-last-error)) + (call-with-values thunk set-last-result)))))) + (append last-result `((output . ,output))))) + +(define (eval-in form spec lang) + (call-with-result + (lambda () + (update-signature-cache spec form) + (eval form (module-spec->namespace spec lang))))) + +(define compile-in eval-in) + +(define (load-file file) + (call-with-result + (lambda () + (load-module file (current-output-port) (last-namespace)) + (update-signature-cache file)))) + +(define compile-file load-file) + +(define (macroexpand form . all) + (let ((all (and (not (null? all)) (car all)))) + (with-output-to-string + (lambda () + (pretty-print (syntax->datum ((if all expand expand-once) form))))))) + +(define (make-repl-reader builtin-reader) + (lambda (ns) + (last-namespace ns) + (printf "racket@~a" (namespace->module-name ns)) + (builtin-reader))) + +;;; eval.rkt ends here diff --git a/scheme/racket/geiser/locations.rkt b/scheme/racket/geiser/locations.rkt new file mode 100644 index 0000000..b4c0f37 --- /dev/null +++ b/scheme/racket/geiser/locations.rkt @@ -0,0 +1,54 @@ +;;; locations.rkt -- locating symbols + +;; Copyright (C) 2009, 2010 Jose Antonio Ortega Ruiz + +;; This program is free software; you can redistribute it and/or +;; modify it under the terms of the Modified BSD License. You should +;; have received a copy of the license along with this program. If +;; not, see . + +;; Start date: Sun Apr 26, 2009 19:43 + +#lang racket + +(provide symbol-location + symbol-location* + module-location + symbol-module-name + symbol-module-path-name) + +(require geiser/utils geiser/modules) + +(define (symbol-location* sym) + (let* ((id (namespace-symbol->identifier sym)) + (binding (and id (identifier-binding id)))) + (if (list? binding) + (cons + (cadr binding) + (resolved-module-path-name + (module-path-index-resolve (car binding)))) + (cons sym #f)))) + +(define (make-location name path line) + (list (cons 'name name) + (cons 'file (if (path? path) (path->string path) '())) + (cons 'line (or line '())))) + +(define (symbol-location sym) + (let* ((loc (symbol-location* sym)) + (name (car loc)) + (path (cdr loc))) + (if path + (make-location name path #f) + (module-location sym)))) + +(define symbol-module-path-name (compose cdr symbol-location*)) + +(define symbol-module-name + (compose module-path-name->name symbol-module-path-name)) + +(define (module-location sym) + (make-location sym (module-spec->path-name sym) 1)) + + +;;; locations.rkt ends here diff --git a/scheme/racket/geiser/main.rkt b/scheme/racket/geiser/main.rkt new file mode 100644 index 0000000..de1c21c --- /dev/null +++ b/scheme/racket/geiser/main.rkt @@ -0,0 +1,47 @@ +;;; main.rkt -- exported interface for emacs + +;; Copyright (C) 2010 Jose Antonio Ortega Ruiz + +;; This program is free software; you can redistribute it and/or +;; modify it under the terms of the Modified BSD License. You should +;; have received a copy of the license along with this program. If +;; not, see . + +;; Start date: Wed Mar 31, 2010 21:14 + +#lang racket/base + +(provide geiser:eval + geiser:compile + geiser:load-file + geiser:compile-file + geiser:macroexpand + geiser:completions + geiser:module-completions + geiser:symbol-location + geiser:module-location + geiser:module-exports + geiser:autodoc + geiser:help) + +(require geiser/eval + geiser/modules + geiser/completions + geiser/locations + geiser/autodoc) + +(define (geiser:eval lang) + (lambda (form spec) (eval-in form spec lang))) +(define geiser:compile compile-in) +(define geiser:load-file load-file) +(define geiser:compile-file compile-file) +(define geiser:autodoc autodoc) +(define geiser:help get-help) +(define geiser:completions symbol-completions) +(define geiser:module-completions module-completions) +(define geiser:symbol-location symbol-location) +(define geiser:module-location module-location) +(define geiser:module-exports module-exports) +(define geiser:macroexpand macroexpand) + +;;; main.rkt ends here diff --git a/scheme/racket/geiser/modules.rkt b/scheme/racket/geiser/modules.rkt new file mode 100644 index 0000000..0de316c --- /dev/null +++ b/scheme/racket/geiser/modules.rkt @@ -0,0 +1,150 @@ +;;; modules.rkt -- module metadata + +;; Copyright (C) 2009, 2010 Jose Antonio Ortega Ruiz + +;; This program is free software; you can redistribute it and/or +;; modify it under the terms of the Modified BSD License. You should +;; have received a copy of the license along with this program. If +;; not, see . + +;; Start date: Wed May 06, 2009 02:35 + +#lang racket + +(provide load-module + ensure-module-spec + module-spec->namespace + namespace->module-path-name + module-path-name->name + module-spec->path-name + module-list + module-exports) + +(require srfi/13 syntax/modresolve syntax/modcode geiser/enter) + +(define (ensure-module-spec spec) + (cond ((symbol? spec) spec) + ((not (string? spec)) #f) + (else `(file ,spec)))) + +(define (module-spec->namespace spec (lang #f)) + (let ((spec (ensure-module-spec spec)) + (try-lang (lambda (_) + (with-handlers ((exn? (const (current-namespace)))) + (and lang + (begin + (load-module lang #f (current-namespace)) + (module->namespace lang))))))) + (or (and spec + (with-handlers ((exn? try-lang)) (get-namespace spec))) + (current-namespace)))) + +(define nowhere (open-output-nowhere)) + +(define (load-module spec (port #f) (ns #f)) + (parameterize ((current-error-port (or port nowhere))) + (enter-module (ensure-module-spec spec)) + (when (namespace? ns) + (current-namespace ns)))) + +(define (namespace->module-path-name ns) + (let ((rmp (variable-reference->resolved-module-path + (eval '(#%variable-reference) ns)))) + (and (resolved-module-path? rmp) + (resolved-module-path-name rmp)))) + +(define (module-spec->path-name spec) + (with-handlers ((exn? (lambda (_) #f))) + (let ((ns (module-spec->namespace (ensure-module-spec spec)))) + (namespace->module-path-name ns)))) + +(define (module-path-name->name path) + (cond ((path? path) + (let* ((path (path->string path)) + (cpaths (map (compose path->string path->directory-path) + (current-library-collection-paths))) + (prefix-len (lambda (p) + (let ((pl (string-length p))) + (if (= pl (string-prefix-length p path)) + pl + 0)))) + (lens (map prefix-len cpaths)) + (real-path (substring path (apply max lens)))) + (if (absolute-path? real-path) + (call-with-values (lambda () (split-path path)) + (lambda (_ basename __) (path->string basename))) + (regexp-replace "\\.[^./]*$" real-path "")))) + ((eq? path '#%kernel) "(kernel)") + ((string? path) path) + ((symbol? path) (symbol->string path)) + (else ""))) + +(define (skippable-dir? path) + (call-with-values (lambda () (split-path path)) + (lambda (_ basename __) + (member (path->string basename) '(".svn" "compiled"))))) + +(define path->symbol (compose string->symbol path->string)) + +(define (path->entry path) + (let ((ext (filename-extension path))) + (and ext + (or (bytes=? ext #"rkt") (bytes=? ext #"ss")) + (let ((path (path->string path))) + (substring path 0 (- (string-length path) 3)))))) + +(define (visit-module-path path kind acc) + (case kind + ((file) (let ((entry (path->entry path))) + (if entry (cons entry acc) acc))) + ((dir) (cond ((skippable-dir? path) (values acc #f)) + ((or (file-exists? (build-path path "main.rkt")) + (file-exists? (build-path path "main.ss"))) + (cons (path->string path) acc)) + (else acc))) + (else acc))) + +(define (find-modules path acc) + (if (directory-exists? path) + (parameterize ((current-directory path)) + (fold-files visit-module-path acc)) + acc)) + +(define (known-modules) + (sort (foldl find-modules '() (current-library-collection-paths)) stringnamespace mod)))))) + +(define (startup) + (thread update-module-cache) + (void)) + +(startup) + +;;; modules.rkt ends here diff --git a/scheme/racket/geiser/user.rkt b/scheme/racket/geiser/user.rkt new file mode 100644 index 0000000..3c1d93e --- /dev/null +++ b/scheme/racket/geiser/user.rkt @@ -0,0 +1,56 @@ +;;; user.rkt -- global bindings visible to geiser users + +;; Copyright (C) 2010 Jose Antonio Ortega Ruiz + +;; This program is free software; you can redistribute it and/or +;; modify it under the terms of the Modified BSD License. You should +;; have received a copy of the license along with this program. If +;; not, see . + +;; Start date: Wed Mar 31, 2010 22:24 + +#lang racket/base + +(provide enter!) + +(require geiser/enter geiser/eval (for-syntax scheme/base)) + +(define-syntax (enter! stx) + (syntax-case stx () + [(enter! mod) + (if (or (not (syntax-e #'mod)) + (module-path? (syntax->datum #'mod))) + #'(do-enter! 'mod) + (raise-syntax-error + #f + "not a valid module path, and not #f" + stx + #'mod))] + [_ (raise-syntax-error + #f + "bad syntax; should be `(enter! )'" + stx)])) + +(define orig-namespace (current-namespace)) + +(define (do-enter! mod) + (if mod + (begin + (enter-module mod) + (let ([ns (module->namespace mod)]) + (current-namespace ns) + (namespace-require 'geiser/user))) + (current-namespace orig-namespace))) + + +(define orig-loader (current-load/use-compiled)) + +(define (init) + (compile-enforce-module-constants #f) + (current-load/use-compiled (module-loader orig-loader)) + (current-prompt-read (compose (make-repl-reader (current-prompt-read)) + current-namespace))) + +(init) + +;;; user.rkt ends here diff --git a/scheme/racket/geiser/utils.rkt b/scheme/racket/geiser/utils.rkt new file mode 100644 index 0000000..730a396 --- /dev/null +++ b/scheme/racket/geiser/utils.rkt @@ -0,0 +1,27 @@ +;;; utils.rkt -- generic utilities + +;; Copyright (C) 2009, 2010 Jose Antonio Ortega Ruiz + +;; This program is free software; you can redistribute it and/or +;; modify it under the terms of the Modified BSD License. You should +;; have received a copy of the license along with this program. If +;; not, see . + +;; Start date: Sun May 03, 2009 03:09 + +#lang racket + +(provide pair->list + keyword->symbol + symbol->keyword) + +(define (pair->list pair) + (let loop ((d pair) (s '())) + (cond ((null? d) (reverse s)) + ((symbol? d) (reverse (cons d s))) + (else (loop (cdr d) (cons (car d) s)))))) + +(define keyword->symbol (compose string->symbol keyword->string)) +(define (symbol->keyword sym) (string->keyword (format "~a" sym))) + +;;; utils.rkt ends here -- cgit v1.2.3