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+;;; Guile High Intermediate Language
+
+;; Copyright (C) 2001 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
+
+;;; Code:
+
+(define-module (language ghil spec)
+  #:use-module (system base language)
+  #:use-module (language glil)
+  #:use-module (language ghil)
+  #:use-module (language ghil compile-glil)
+  #:export (ghil))
+
+(define (write-ghil exp . port)
+  (apply write (unparse-ghil exp) port))
+
+(define (parse x)
+  (call-with-ghil-environment (make-ghil-toplevel-env (current-module)) '()
+    (lambda (env vars)
+      (make-ghil-lambda env #f vars #f '() (parse-ghil env x)))))
+
+(define (join exps env)
+  (if (or-map (lambda (x)
+                (or (not (ghil-lambda? x))
+                    (ghil-lambda-rest x)
+                    (memq 'argument
+                          (map ghil-var-kind
+                               (ghil-env-variables (ghil-lambda-env x))))))
+              exps)
+      (error "GHIL expressions to join must be thunks"))
+
+  (let ((env (make-ghil-env env '()
+                            (apply append
+                                   (map ghil-env-variables
+                                        (map ghil-lambda-env exps))))))
+    (make-ghil-lambda env #f '() #f '()
+                      (make-ghil-begin env #f
+                                       (map ghil-lambda-body exps)))))
+
+(define-language ghil
+  #:title	"Guile High Intermediate Language (GHIL)"
+  #:version	"0.3"
+  #:reader	read
+  #:printer	write-ghil
+  #:parser      parse
+  #:joiner      join
+  #:compilers   `((glil . ,compile-glil))
+  )