mirror of
https://git.savannah.gnu.org/git/guile.git
synced 2025-05-14 09:40:20 +02:00
b0b180d522
* module/system/base/language.scm (<language>): Rework so that instead of hardcoding passes in the language, we define compilers that translate from one language to another. Add `parser' to the language fields, a bit of a hack but useful for languages with s-expression external representations but with record internal representations. (define-language, *compilation-cache*, invalidate-compilation-cache!) (compute-compilation-order, lookup-compilation-order): Add an algorithm that does a depth-first search for a translation path from a source language to a target language, caching the result in a lookup table. * module/language/scheme/spec.scm: * module/language/ghil/spec.scm: Update to the new language format. * module/language/glil/spec.scm: Add a language specification for GLIL, with a compiler to objcode. Also there are parsers and printers, for repl usage, but for some reason this doesn't work yet. * module/language/objcode/spec.scm: Define a language specification for object code. There is some sleight of hand here, in the "compiler" to values; but there is method behind the madness, because this way we higher levels can pass environments (a module + externals pair) to objcode->program. * module/language/value/spec.scm: Define a language specification for values. There is something intellectually dishonest about this, but it does serve its purpose as a foundation for the language hierarchy. * configure.in: * module/language/Makefile.am * module/language/ghil/Makefile.am * module/language/glil/Makefile.am * module/language/objcode/Makefile.am * module/language/value/Makefile.am: Autotomfoolery for the ghil, glil, objcode, and value languages. * module/language/scheme/translate.scm (translate): Import the bits that understand `compile-time-environment' here, and pass on the relevant portions of the environment to the next compiler pass. * module/system/base/compile.scm (current-language): New procedure, refs the current language fluid, or lazily sets it to scheme. (call-once, call-with-output-file/atomic): Refactor these bits to use with-throw-handler. No functional change. (compile-file, compile-and-load, compile-passes, compile-fold) (compile): Refactor the public interface of the compiler to be generic and simple. Uses `lookup-compilation-order' to find a path from the source language to the target language. * module/system/base/syntax.scm (define-type): Adapt to changes in define-record. (define-record): Instead of expecting all slots in the first form, expect them in the body, and let the first form hold the options. * module/system/il/compile.scm (compile): Adapt to the compilation pass API (three in and two out). * module/system/il/ghil.scm (<ghil-var>, <ghil-env>) (<ghil-toplevel-env>): Adapt to define-record changes. * module/system/il/glil.scm (<glil-vars>): Adapt to define-record changes. (<glil>, print-glil): Add a GLIL record printer that uses unparse. (parse-glil, unparse-glil): Update unparse (formerly known as pprint), and write a parse function. * module/system/repl/common.scm (<repl>): Adapt to define-record changes. (repl-parse): New function, parses the read form using the current language. Something of a hack. (repl-compile): Adapt to changes in `compile'. (repl-eval): Fix up the does-the-language-have-a-compiler check for changes in <language>. * module/system/repl/repl.scm (start-repl): Parse the form before eval. * module/system/repl/command.scm (describe): Parse. (compile): Be more generic. (compile-file): Adapt to changes in compile-file. (disassemble, time, profile, trace): Parse. * module/system/vm/debug.scm: * module/system/vm/assemble.scm: Adapt to define-record changes. * module/language/scheme/translate.scm (receive): Fix an important bug that gave `receive' letrec semantics instead of let semantics. Whoops!
75 lines
2.3 KiB
Scheme
75 lines
2.3 KiB
Scheme
;;; Multi-language support
|
||
|
||
;; Copyright (C) 2001 Free Software Foundation, Inc.
|
||
|
||
;; This program is free software; you can redistribute it and/or modify
|
||
;; it under the terms of the GNU General Public License as published by
|
||
;; the Free Software Foundation; either version 2, or (at your option)
|
||
;; any later version.
|
||
;;
|
||
;; This program is distributed in the hope that it will be useful,
|
||
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
;; GNU General Public License for more details.
|
||
;;
|
||
;; You should have received a copy of the GNU General Public License
|
||
;; along with this program; see the file COPYING. If not, write to
|
||
;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
||
;; Boston, MA 02111-1307, USA.
|
||
|
||
;;; Code:
|
||
|
||
(define-module (system base language)
|
||
#:use-module (system base syntax)
|
||
#:export (define-language lookup-language make-language
|
||
language-name language-title language-version language-reader
|
||
language-printer language-parser language-read-file
|
||
language-compilers language-evaluator
|
||
|
||
lookup-compilation-order invalidate-compilation-cache!))
|
||
|
||
|
||
;;;
|
||
;;; Language class
|
||
;;;
|
||
|
||
(define-record <language>
|
||
name
|
||
title
|
||
version
|
||
reader
|
||
printer
|
||
(parser #f)
|
||
(read-file #f)
|
||
(compilers '())
|
||
(evaluator #f))
|
||
|
||
(define-macro (define-language name . spec)
|
||
`(begin
|
||
(invalidate-compilation-cache!)
|
||
(define ,name (make-language #:name ',name ,@spec))))
|
||
|
||
(define (lookup-language name)
|
||
(let ((m (resolve-module `(language ,name spec))))
|
||
(if (module-bound? m name)
|
||
(module-ref m name)
|
||
(error "no such language" name))))
|
||
|
||
(define *compilation-cache* '())
|
||
|
||
(define (invalidate-compilation-cache!)
|
||
(set! *compilation-cache* '()))
|
||
|
||
(define (compute-compilation-order from to)
|
||
(let lp ((from from) (seen '()))
|
||
(cond ((eq? from to) (reverse! (cons from seen)))
|
||
((memq from seen) #f)
|
||
(else (or-map (lambda (lang) (lp lang (cons from seen)))
|
||
(map car (language-compilers from)))))))
|
||
|
||
(define (lookup-compilation-order from to)
|
||
(or (assoc-ref *compilation-cache* (cons from to))
|
||
(let ((order (compute-compilation-order from to)))
|
||
(set! *compilation-cache*
|
||
(acons (cons from to) order *compilation-cache*))
|
||
order)))
|