0.8.9.10:

[sbcl.git] / src / compiler / ir1tran-lambda.lisp

diff --git a/src/compiler/ir1tran-lambda.lisp b/src/compiler/ir1tran-lambda.lisp
index 1f4b91d..3fcf355 100644 (file)
--- a/src/compiler/ir1tran-lambda.lisp
+++ b/src/compiler/ir1tran-lambda.lisp
@@ -255,6 +255,24 @@
                                      (rest svars))))))
   (values))
 
+;;; FIXME: this is the interface of the CMUCL WITH-DYNAMIC-EXTENT
+;;; macro.  It is slightly confusing, in that START and BODY-START are
+;;; already-existing CTRANs (and FIXME: probably deserve a ONCE-ONLY),
+;;; whereas NEXT is a variable naming a CTRAN in the body.  -- CSR,
+;;; 2004-03-30.
+(defmacro with-dynamic-extent ((start body-start next kind) &body body)
+  (with-unique-names (cleanup next-ctran)
+    `(progn
+      (ctran-starts-block ,body-start)
+      (let ((,cleanup (make-cleanup :kind :dynamic-extent))
+           (,next-ctran (make-ctran))
+           (,next (make-ctran)))
+       (ir1-convert ,start ,next-ctran nil '(%dynamic-extent-start))
+       (setf (cleanup-mess-up ,cleanup) (ctran-use ,next-ctran))
+       (let ((*lexenv* (make-lexenv :cleanup ,cleanup)))
+         (ir1-convert ,next-ctran ,next nil '(%cleanup-point))
+         (locally ,@body))))))
+
 ;;; Create a lambda node out of some code, returning the result. The
 ;;; bindings are specified by the list of VAR structures VARS. We deal
 ;;; with adding the names to the LEXENV-VARS for the conversion. The
@@ -267,7 +285,7 @@
 ;;; the special binding code.
 ;;;
 ;;; We ignore any ARG-INFO in the VARS, trusting that someone else is
-;;; dealing with &nonsense.
+;;; dealing with &NONSENSE, except for &REST vars with DYNAMIC-EXTENT.
 ;;;
 ;;; AUX-VARS is a list of VAR structures for variables that are to be
 ;;; sequentially bound. Each AUX-VAL is a form that is to be evaluated
@@ -291,7 +309,8 @@
                   :%source-name source-name
                   :%debug-name debug-name))
         (result-ctran (make-ctran))
-         (result-lvar (make-lvar)))
+         (result-lvar (make-lvar))
+        (dx-rest nil))
 
     (awhen (lexenv-lambda *lexenv*)
       (push lambda (lambda-children it))
@@ -321,7 +340,12 @@
                (t
                  (when note-lexical-bindings
                    (note-lexical-binding (leaf-source-name var)))
-                (new-venv (cons (leaf-source-name var) var))))))
+                (new-venv (cons (leaf-source-name var) var)))))
+       (let ((info (lambda-var-arg-info var)))
+         (when (and info
+                    (eq (arg-info-kind info) :rest)
+                    (leaf-dynamic-extent var))
+           (setq dx-rest t))))
 
       (let ((*lexenv* (make-lexenv :vars (new-venv)
                                   :lambda lambda
@@ -346,9 +370,14 @@
             (ctran-starts-block prebind-ctran)
             (link-node-to-previous-ctran bind prebind-ctran)
             (use-ctran bind postbind-ctran)
-            (ir1-convert-special-bindings postbind-ctran result-ctran result-lvar
-                                          body
-                                          aux-vars aux-vals (svars))))))
+           (if dx-rest
+               (with-dynamic-extent (postbind-ctran result-ctran dx :rest)
+                 (ir1-convert-special-bindings dx result-ctran result-lvar
+                                               body aux-vars aux-vals
+                                               (svars)))
+               (ir1-convert-special-bindings postbind-ctran result-ctran
+                                             result-lvar body
+                                             aux-vars aux-vals (svars)))))))
 
     (link-blocks (component-head *current-component*) (node-block bind))
     (push lambda (component-new-functionals *current-component*))
@@ -514,7 +543,8 @@
       (arg-vars context-temp count-temp)
 
       (when rest
-       (arg-vals `(%listify-rest-args ,n-context ,n-count)))
+       (arg-vals `(%listify-rest-args
+                   ,n-context ,n-count ,(leaf-dynamic-extent rest))))
       (when morep
        (arg-vals n-context)
        (arg-vals n-count))