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;;; High-level compiler interface
;; 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 compile)
#:use-module (system base syntax)
#:use-module (system base language)
#:use-module (language objcode spec)
#:use-module (language value spec)
#:use-module (system vm vm) ;; FIXME: there's a reason for this, can't remember why tho
#:use-module (ice-9 regex)
#:use-module (ice-9 optargs)
#:use-module (ice-9 receive)
#:export (syntax-error
*current-language*
compiled-file-name compile-file compile-and-load
compile compile-time-environment)
#:export-syntax (call-with-compile-error-catch))
;;;
;;; Compiler environment
;;;
(define (syntax-error loc msg exp)
(throw 'syntax-error-compile-time loc msg exp))
(define-macro (call-with-compile-error-catch thunk)
`(catch 'syntax-error-compile-time
,thunk
(lambda (key loc msg exp)
(if (pair? loc)
(format (current-error-port)
"~A:~A: ~A: ~A~%" (car loc) (cdr loc) msg exp)
(format (current-error-port)
"unknown location: ~A: ~A~%" msg exp)))))
;;;
;;; Compiler
;;;
(define *current-language* (make-fluid))
(define (current-language)
(or (fluid-ref *current-language*)
(begin (fluid-set! *current-language* (lookup-language 'scheme))
(current-language))))
(define (call-once thunk)
(let ((entered #f))
(dynamic-wind
(lambda ()
(if entered
(error "thunk may only be entered once: ~a" thunk))
(set! entered #t))
thunk
(lambda () #t))))
(define (call-with-output-file/atomic filename proc)
(let* ((template (string-append filename ".XXXXXX"))
(tmp (mkstemp! template)))
(call-once
(lambda ()
(with-throw-handler #t
(lambda ()
(with-output-to-port tmp
(lambda () (proc (current-output-port))))
(rename-file template filename))
(lambda args
(delete-file template)))))))
(define* (compile-file file #:key (to objcode) (opts '()))
(let ((comp (compiled-file-name file))
(lang (current-language)))
(catch 'nothing-at-all
(lambda ()
(call-with-compile-error-catch
(lambda ()
(call-with-output-file/atomic comp
(lambda (port)
(let ((print (language-printer to)))
(print (compile (read-file-in file lang)
#:from lang #:to to #:opts opts)
port))))
(format #t "wrote `~A'\n" comp))))
(lambda (key . args)
(format #t "ERROR: during compilation of ~A:\n" file)
(display "ERROR: ")
(apply format #t (cadr args) (caddr args))
(newline)
(format #t "ERROR: ~A ~A ~A\n" key (car args) (cadddr args))
(delete-file comp)))))
(define* (compile-and-load file #:key (to value) (opts '()))
(let ((lang (current-language)))
(compile (read-file-in file lang) #:to value #:opts opts)))
(define (compiled-file-name file)
(let ((base (basename file))
(cext (cond ((or (null? %load-compiled-extensions)
(string-null? (car %load-compiled-extensions)))
(warn "invalid %load-compiled-extensions"
%load-compiled-extensions)
".go")
(else (car %load-compiled-extensions)))))
(let lp ((exts %load-extensions))
(cond ((null? exts) (string-append base cext))
((string-null? (car exts)) (lp (cdr exts)))
((string-suffix? (car exts) base)
(string-append
(substring base 0
(- (string-length base) (string-length (car exts))))
cext))
(else (lp (cdr exts)))))))
;;;
;;; Compiler interface
;;;
(define (read-file-in file lang)
(call-with-input-file file
(or (language-read-file lang)
(error "language has no #:read-file" lang))))
(define (compile-passes from to opts)
(let lp ((langs (or (lookup-compilation-order from to)
(error "no way to compile" (language-name from)
"to" (language-name to))))
(out '()))
(if (null? (cdr langs))
(reverse! out)
(lp (cdr langs)
(cons (assq-ref (language-compilers (car langs)) (cadr langs))
out)))))
(define (compile-fold passes exp env opts)
(if (null? passes)
exp
(receive (exp env) ((car passes) exp env opts)
(compile-fold (cdr passes) exp env opts))))
(define (compile-time-environment)
"A special function known to the compiler that, when compiled, will
return a representation of the lexical environment in place at compile
time. Useful for supporting some forms of dynamic compilation. Returns
#f if called from the interpreter."
#f)
(define* (compile x #:key
(env #f)
(from (current-language))
(to value)
(opts '()))
(compile-fold (compile-passes from to opts)
x
env
opts))
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