0.8.0.24:

[sbcl.git] / src / code / defboot.lisp

diff --git a/src/code/defboot.lisp b/src/code/defboot.lisp
index e280779..8df43b2 100644 (file)
--- a/src/code/defboot.lisp
+++ b/src/code/defboot.lisp
@@ -19,9 +19,6 @@
 ;;;; files for more information.
 
 (in-package "SB!IMPL")
 ;;;; files for more information.
 
 (in-package "SB!IMPL")

-
-(file-comment
-  "$Header$")

 \f
 ;;;; IN-PACKAGE
 
 \f
 ;;;; IN-PACKAGE
 

@@ -29,7 +26,7 @@
   `(eval-when (:compile-toplevel :load-toplevel :execute)
      (setq *package* (find-undeleted-package-or-lose ',package-designator))))
 \f
   `(eval-when (:compile-toplevel :load-toplevel :execute)
      (setq *package* (find-undeleted-package-or-lose ',package-designator))))
 \f

-;;; MULTIPLE-VALUE-FOO
+;;;; MULTIPLE-VALUE-FOO

 
 (defun list-of-symbols-p (x)
   (and (listp x)
 
 (defun list-of-symbols-p (x)
   (and (listp x)

@@ -50,22 +47,9 @@
     (error "Vars is not a list of symbols: ~S" vars)))
 
 (defmacro-mundanely multiple-value-setq (vars value-form)
     (error "Vars is not a list of symbols: ~S" vars)))
 
 (defmacro-mundanely multiple-value-setq (vars value-form)

-  (cond ((null vars)
-        ;; The ANSI spec says that the primary value of VALUE-FORM must be
-        ;; returned. The general-case-handling code below doesn't do this
-        ;; correctly in the special case when there are no vars bound, so we
-        ;; handle this special case separately here.
-        (let ((g (gensym)))
-          `(multiple-value-bind (,g) ,value-form
-             ,g)))
-       ((list-of-symbols-p vars)
-        (let ((temps (make-gensym-list (length vars))))
-          `(multiple-value-bind ,temps ,value-form
-             ,@(mapcar #'(lambda (var temp)
-                           `(setq ,var ,temp))
-                       vars temps)
-             ,(car temps))))
-       (t (error "Vars is not a list of symbols: ~S" vars))))
+  (unless (list-of-symbols-p vars)
+    (error "Vars is not a list of symbols: ~S" vars))
+  `(values (setf (values ,@vars) ,value-form)))

 
 (defmacro-mundanely multiple-value-list (value-form)
   `(multiple-value-call #'list ,value-form))
 
 (defmacro-mundanely multiple-value-list (value-form)
   `(multiple-value-call #'list ,value-form))

@@ -75,31 +59,31 @@
 ;;; COND defined in terms of IF
 (defmacro-mundanely cond (&rest clauses)
   (if (endp clauses)
 ;;; COND defined in terms of IF
 (defmacro-mundanely cond (&rest clauses)
   (if (endp clauses)

-    nil
-    (let ((clause (first clauses)))
-      (if (atom clause)
-       (error "Cond clause is not a list: ~S" clause)
-       (let ((test (first clause))
-             (forms (rest clause)))
-         (if (endp forms)
-           (let ((n-result (gensym)))
-             `(let ((,n-result ,test))
-                (if ,n-result
-                  ,n-result
-                  (cond ,@(rest clauses)))))
-           `(if ,test
-              (progn ,@forms)
-              (cond ,@(rest clauses)))))))))
+      nil
+      (let ((clause (first clauses)))
+       (if (atom clause)
+           (error "COND clause is not a list: ~S" clause)
+           (let ((test (first clause))
+                 (forms (rest clause)))
+             (if (endp forms)
+                 (let ((n-result (gensym)))
+                   `(let ((,n-result ,test))
+                      (if ,n-result
+                          ,n-result
+                          (cond ,@(rest clauses)))))
+                 `(if ,test
+                      (progn ,@forms)
+                      (cond ,@(rest clauses)))))))))

 
 ;;; other things defined in terms of COND
 (defmacro-mundanely when (test &body forms)
   #!+sb-doc
 
 ;;; other things defined in terms of COND
 (defmacro-mundanely when (test &body forms)
   #!+sb-doc

-  "First arg is a predicate. If it is non-null, the rest of the forms are
+  "If the first argument is true, the rest of the forms are

   evaluated as a PROGN."
   `(cond (,test nil ,@forms)))
 (defmacro-mundanely unless (test &body forms)
   #!+sb-doc
   evaluated as a PROGN."
   `(cond (,test nil ,@forms)))
 (defmacro-mundanely unless (test &body forms)
   #!+sb-doc

-  "First arg is a predicate. If it is null, the rest of the forms are
+  "If the first argument is not true, the rest of the forms are

   evaluated as a PROGN."
   `(cond ((not ,test) nil ,@forms)))
 (defmacro-mundanely and (&rest forms)
   evaluated as a PROGN."
   `(cond ((not ,test) nil ,@forms)))
 (defmacro-mundanely and (&rest forms)

@@ -144,97 +128,132 @@
 (defmacro-mundanely prog2 (form1 result &body body)
   `(prog1 (progn ,form1 ,result) ,@body))
 \f
 (defmacro-mundanely prog2 (form1 result &body body)
   `(prog1 (progn ,form1 ,result) ,@body))
 \f

-;;; Now that we have the definition of MULTIPLE-VALUE-BIND, we can make a
-;;; reasonably readable definition of DEFUN.
-;;;
-;;; DEFUN expands into %DEFUN which is a function that is treated
-;;; magically by the compiler (through an IR1 transform) in order to
-;;; handle stuff like inlining. After the compiler has gotten the
-;;; information it wants out of macro definition, it compiles a call
-;;; to %%DEFUN which happens at load time.
-(defmacro-mundanely defun (&whole whole name args &body body)
+;;;; DEFUN
+
+;;; Should we save the inline expansion of the function named NAME?
+(defun inline-fun-name-p (name)
+  (or
+   ;; the normal reason for saving the inline expansion
+   (info :function :inlinep name)
+   ;; another reason for saving the inline expansion: If the
+   ;; ANSI-recommended idiom
+   ;;   (DECLAIM (INLINE FOO))
+   ;;   (DEFUN FOO ..)
+   ;;   (DECLAIM (NOTINLINE FOO))
+   ;; has been used, and then we later do another
+   ;;   (DEFUN FOO ..)
+   ;; without a preceding
+   ;;   (DECLAIM (INLINE FOO))
+   ;; what should we do with the old inline expansion when we see the
+   ;; new DEFUN? Overwriting it with the new definition seems like
+   ;; the only unsurprising choice.
+   (info :function :inline-expansion-designator name)))
+
+(defmacro-mundanely defun (&environment env name args &body body)
+  "Define a function at top level."
+  #+sb-xc-host
+  (unless (symbol-package (fun-name-block-name name))
+    (warn "DEFUN of uninterned symbol ~S (tricky for GENESIS)" name))

   (multiple-value-bind (forms decls doc) (parse-body body)
   (multiple-value-bind (forms decls doc) (parse-body body)

-    (let ((def `(lambda ,args
-                 ,@decls
-                 (block ,(function-name-block-name name)
-                   ,@forms))))
-      `(sb!c::%defun ',name #',def ,doc ',whole))))
-#+sb-xc-host (/show "before PROCLAIM" (sb!c::info :function :kind 'sb!c::%%defun))
-#+sb-xc-host (sb!xc:proclaim '(ftype function sb!c::%%defun)) ; to avoid
-                                       ; undefined function warnings
-#+sb-xc-host (/show "after PROCLAIM" (sb!c::info :function :kind 'sb!c::%%defun))
-(defun sb!c::%%defun (name def doc &optional inline-expansion)
+    (let* (;; stuff shared between LAMBDA and INLINE-LAMBDA and NAMED-LAMBDA
+          (lambda-guts `(,args
+                         ,@decls
+                         (block ,(fun-name-block-name name)
+                           ,@forms)))
+          (lambda `(lambda ,@lambda-guts))
+           #-sb-xc-host
+          (named-lambda `(named-lambda ,name ,@lambda-guts))
+          (inline-lambda
+           (when (inline-fun-name-p name)
+             ;; we want to attempt to inline, so complain if we can't
+             (or (sb!c:maybe-inline-syntactic-closure lambda env)
+                 (progn
+                   (#+sb-xc-host warn
+                    #-sb-xc-host sb!c:maybe-compiler-note
+                    "lexical environment too hairy, can't inline DEFUN ~S"
+                    name)
+                   nil)))))
+      `(progn
+
+        ;; In cross-compilation of toplevel DEFUNs, we arrange
+        ;; for the LAMBDA to be statically linked by GENESIS.
+        ;;
+        ;; It may seem strangely inconsistent not to use NAMED-LAMBDA
+        ;; here instead of LAMBDA. The reason is historical:
+        ;; COLD-FSET was written before NAMED-LAMBDA, and has special
+        ;; logic of its own to notify the compiler about NAME.
+        #+sb-xc-host
+        (cold-fset ,name ,lambda)
+
+        (eval-when (:compile-toplevel :load-toplevel :execute)
+          (sb!c:%compiler-defun ',name ',inline-lambda))
+
+        (%defun ',name
+                ;; In normal compilation (not for cold load) this is
+                ;; where the compiled LAMBDA first appears. In
+                ;; cross-compilation, we manipulate the
+                ;; previously-statically-linked LAMBDA here.
+                #-sb-xc-host ,named-lambda
+                #+sb-xc-host (fdefinition ',name)
+                ,doc)))))
+#-sb-xc-host
+(defun %defun (name def doc)
+  (declare (type function def))
+  (declare (type (or null simple-string) doc))
+  (aver (legal-fun-name-p name)) ; should've been checked by DEFMACRO DEFUN

   (when (fboundp name)
   (when (fboundp name)

+    (/show0 "redefining NAME in %DEFUN")

     (style-warn "redefining ~S in DEFUN" name))
   (setf (sb!xc:fdefinition name) def)
     (style-warn "redefining ~S in DEFUN" name))
   (setf (sb!xc:fdefinition name) def)

+  
+  ;; FIXME: I want to do this here (and fix bug 137), but until the
+  ;; breathtaking CMU CL function name architecture is converted into
+  ;; something sane, (1) doing so doesn't really fix the bug, and 
+  ;; (2) doing probably isn't even really safe.
+  #+nil (setf (%fun-name def) name)
+

   (when doc
   (when doc

-    ;; FIXME: This should use shared SETF-name parsing logic.
-    (if (and (consp name) (eq (first name) 'setf))
-       (setf (fdocumentation (second name) 'setf) doc)
-       (setf (fdocumentation name 'function) doc)))
-  (sb!c::proclaim-as-function-name name)
-  (if (eq (info :function :where-from name) :assumed)
-      (progn
-       (setf (info :function :where-from name) :defined)
-       (if (info :function :assumed-type name)
-           (setf (info :function :assumed-type name) nil))))
-  (when (or inline-expansion
-           (info :function :inline-expansion name))
-    (setf (info :function :inline-expansion name)
-         inline-expansion))
+    (setf (fdocumentation name 'function) doc))

   name)
   name)

-;;; Ordinarily this definition of SB!C:%DEFUN as an ordinary function is not
-;;; used: the parallel (but different) definition as an IR1 transform takes
-;;; precedence. However, it's still good to define this in order to keep the
-;;; interpreter happy. We define it here (instead of alongside the parallel
-;;; IR1 transform) because while the IR1 transform is needed and appropriate
-;;; in the cross-compiler running in the host Common Lisp, this parallel
-;;; ordinary function definition is only appropriate in the target Lisp.
-(defun sb!c::%defun (name def doc source)
-  (declare (ignore source))
-  (setf (sb!eval:interpreted-function-name def) name)
-  (sb!c::%%defun name def doc))

 \f
 ;;;; DEFVAR and DEFPARAMETER
 
 (defmacro-mundanely defvar (var &optional (val nil valp) (doc nil docp))
   #!+sb-doc
 \f
 ;;;; DEFVAR and DEFPARAMETER
 
 (defmacro-mundanely defvar (var &optional (val nil valp) (doc nil docp))
   #!+sb-doc

-  "For defining global variables at top level. Declares the variable
-  SPECIAL and, optionally, initializes it. If the variable already has a
+  "Define a global variable at top level. Declare the variable
+  SPECIAL and, optionally, initialize it. If the variable already has a

   value, the old value is not clobbered. The third argument is an optional
   documentation string for the variable."
   `(progn
      (declaim (special ,var))
      ,@(when valp
         `((unless (boundp ',var)
   value, the old value is not clobbered. The third argument is an optional
   documentation string for the variable."
   `(progn
      (declaim (special ,var))
      ,@(when valp
         `((unless (boundp ',var)

-            (setq ,var ,val))))
+            (set ',var ,val))))

      ,@(when docp
      ,@(when docp

-        `((funcall #'(setf fdocumentation) ',doc ',var 'variable)))
+        `((setf (fdocumentation ',var 'variable) ',doc )))

      ',var))
 
 (defmacro-mundanely defparameter (var val &optional (doc nil docp))
   #!+sb-doc
      ',var))
 
 (defmacro-mundanely defparameter (var val &optional (doc nil docp))
   #!+sb-doc

-  "Defines a parameter that is not normally changed by the program,
-  but that may be changed without causing an error. Declares the
-  variable special and sets its value to VAL. The third argument is
-  an optional documentation string for the parameter."
+  "Define a parameter that is not normally changed by the program,
+  but that may be changed without causing an error. Declare the
+  variable special and sets its value to VAL, overwriting any
+  previous value. The third argument is an optional documentation
+  string for the parameter."

   `(progn
      (declaim (special ,var))
   `(progn
      (declaim (special ,var))

-     (setq ,var ,val)
+     (set ',var ,val)

      ,@(when docp
      ,@(when docp

-        ;; FIXME: The various FUNCALL #'(SETF FDOCUMENTATION) and
-        ;; other FUNCALL #'(SETF FOO) forms in the code should
-        ;; unbogobootstrapized back to ordinary SETF forms.
-        `((funcall #'(setf fdocumentation) ',doc ',var 'variable)))
+        `((setf (fdocumentation ',var 'variable) ',doc)))

      ',var))
 \f
 ;;;; iteration constructs
 
      ',var))
 \f
 ;;;; iteration constructs
 

-;;; (These macros are defined in terms of a function DO-DO-BODY which is also
-;;; used by SB!INT:DO-ANONYMOUS. Since these macros should not be loaded
-;;; on the cross-compilation host, but SB!INT:DO-ANONYMOUS and DO-DO-BODY
-;;; should be, these macros can't conveniently be in the same file as
-;;; DO-DO-BODY.)
+;;; (These macros are defined in terms of a function FROB-DO-BODY which
+;;; is also used by SB!INT:DO-ANONYMOUS. Since these macros should not
+;;; be loaded on the cross-compilation host, but SB!INT:DO-ANONYMOUS
+;;; and FROB-DO-BODY should be, these macros can't conveniently be in
+;;; the same file as FROB-DO-BODY.)

 (defmacro-mundanely do (varlist endlist &body body)
   #!+sb-doc
   "DO ({(Var [Init] [Step])}*) (Test Exit-Form*) Declaration* Form*
 (defmacro-mundanely do (varlist endlist &body body)
   #!+sb-doc
   "DO ({(Var [Init] [Step])}*) (Test Exit-Form*) Declaration* Form*

@@ -245,7 +264,7 @@
   are evaluated as a PROGN, with the result being the value of the DO. A block
   named NIL is established around the entire expansion, allowing RETURN to be
   used as an alternate exit mechanism."
   are evaluated as a PROGN, with the result being the value of the DO. A block
   named NIL is established around the entire expansion, allowing RETURN to be
   used as an alternate exit mechanism."

-  (do-do-body varlist endlist body 'let 'psetq 'do nil))
+  (frob-do-body varlist endlist body 'let 'psetq 'do nil))

 (defmacro-mundanely do* (varlist endlist &body body)
   #!+sb-doc
   "DO* ({(Var [Init] [Step])}*) (Test Exit-Form*) Declaration* Form*
 (defmacro-mundanely do* (varlist endlist &body body)
   #!+sb-doc
   "DO* ({(Var [Init] [Step])}*) (Test Exit-Form*) Declaration* Form*

@@ -256,53 +275,49 @@
   the Exit-Forms are evaluated as a PROGN, with the result being the value
   of the DO. A block named NIL is established around the entire expansion,
   allowing RETURN to be used as an laternate exit mechanism."
   the Exit-Forms are evaluated as a PROGN, with the result being the value
   of the DO. A block named NIL is established around the entire expansion,
   allowing RETURN to be used as an laternate exit mechanism."

-  (do-do-body varlist endlist body 'let* 'setq 'do* nil))
+  (frob-do-body varlist endlist body 'let* 'setq 'do* nil))

 
 

-;;; DOTIMES and DOLIST could be defined more concisely using destructuring
-;;; macro lambda lists or DESTRUCTURING-BIND, but then it'd be tricky to use
-;;; them before those things were defined. They're used enough times before
-;;; destructuring mechanisms are defined that it looks as though it's worth
-;;; just implementing them ASAP, at the cost of being unable to use the
-;;; standard destructuring mechanisms.
-(defmacro-mundanely dotimes (var-count-result &body body)
-  (multiple-value-bind ; to roll our own destructuring
-      (var count result)
-      (apply (lambda (var count &optional (result nil))
-              (values var count result))
-            var-count-result)
-    (cond ((numberp count)
-          `(do ((,var 0 (1+ ,var)))
-               ((>= ,var ,count) ,result)
-             (declare (type unsigned-byte ,var))
-             ,@body))
-         (t (let ((v1 (gensym)))
-              `(do ((,var 0 (1+ ,var)) (,v1 ,count))
-                   ((>= ,var ,v1) ,result)
-                 (declare (type unsigned-byte ,var))
-                 ,@body))))))
-(defmacro-mundanely dolist (var-list-result &body body)
-  (multiple-value-bind ; to roll our own destructuring
-      (var list result)
-      (apply (lambda (var list &optional (result nil))
-              (values var list result))
-            var-list-result)
-    ;; We repeatedly bind the var instead of setting it so that we never have
-    ;; to give the var an arbitrary value such as NIL (which might conflict
-    ;; with a declaration). If there is a result form, we introduce a
-    ;; gratuitous binding of the variable to NIL w/o the declarations, then
-    ;; evaluate the result form in that environment. We spuriously reference
-    ;; the gratuitous variable, since we don't want to use IGNORABLE on what
-    ;; might be a special var.
+;;; DOTIMES and DOLIST could be defined more concisely using
+;;; destructuring macro lambda lists or DESTRUCTURING-BIND, but then
+;;; it'd be tricky to use them before those things were defined.
+;;; They're used enough times before destructuring mechanisms are
+;;; defined that it looks as though it's worth just implementing them
+;;; ASAP, at the cost of being unable to use the standard
+;;; destructuring mechanisms.
+(defmacro-mundanely dotimes ((var count &optional (result nil)) &body body)
+  (cond ((numberp count)
+        `(do ((,var 0 (1+ ,var)))
+          ((>= ,var ,count) ,result)
+          (declare (type unsigned-byte ,var))
+          ,@body))
+       (t (let ((v1 (gensym)))
+            `(do ((,var 0 (1+ ,var)) (,v1 ,count))
+              ((>= ,var ,v1) ,result)
+              (declare (type unsigned-byte ,var))
+              ,@body)))))
+
+(defmacro-mundanely dolist ((var list &optional (result nil)) &body body)
+  ;; We repeatedly bind the var instead of setting it so that we never
+  ;; have to give the var an arbitrary value such as NIL (which might
+  ;; conflict with a declaration). If there is a result form, we
+  ;; introduce a gratuitous binding of the variable to NIL without the
+  ;; declarations, then evaluate the result form in that
+  ;; environment. We spuriously reference the gratuitous variable,
+  ;; since we don't want to use IGNORABLE on what might be a special
+  ;; var.
+  (multiple-value-bind (forms decls) (parse-body body nil)

     (let ((n-list (gensym)))
     (let ((n-list (gensym)))

-      `(do ((,n-list ,list (cdr ,n-list)))
-          ((endp ,n-list)
-           ,@(if result
-               `((let ((,var nil))
-                   ,var
-                   ,result))
-               '(nil)))
-        (let ((,var (car ,n-list)))
-          ,@body)))))
+      `(do* ((,n-list ,list (cdr ,n-list)))
+       ((endp ,n-list)
+        ,@(if result
+              `((let ((,var nil))
+                  ,var
+                  ,result))
+              '(nil)))
+       (let ((,var (car ,n-list)))
+         ,@decls
+         (tagbody
+            ,@forms))))))

 \f
 ;;;; miscellaneous
 
 \f
 ;;;; miscellaneous
 

@@ -311,26 +326,57 @@
 
 (defmacro-mundanely psetq (&rest pairs)
   #!+sb-doc
 
 (defmacro-mundanely psetq (&rest pairs)
   #!+sb-doc

-  "SETQ {var value}*
+  "PSETQ {var value}*

    Set the variables to the values, like SETQ, except that assignments
    happen in parallel, i.e. no assignments take place until all the
    forms have been evaluated."
    Set the variables to the values, like SETQ, except that assignments
    happen in parallel, i.e. no assignments take place until all the
    forms have been evaluated."

-  ;; (This macro is used in the definition of DO, so we can't use DO in the
-  ;; definition of this macro without getting into confusing bootstrap issues.)
-  (prog ((lets nil)
-        (setqs nil)
-        (pairs pairs))
-    :again
-    (when (atom (cdr pairs))
-      (return `(let ,(nreverse lets)
-                (setq ,@(nreverse setqs))
-                nil)))
-    (let ((gen (gensym)))
-      (setq lets (cons `(,gen ,(cadr pairs)) lets)
-           setqs (list* gen (car pairs) setqs)
-           pairs (cddr pairs)))
-    (go :again)))
+  ;; Given the possibility of symbol-macros, we delegate to PSETF
+  ;; which knows how to deal with them, after checking that syntax is
+  ;; compatible with PSETQ.
+  (do ((pair pairs (cddr pair)))
+      ((endp pair) `(psetf ,@pairs))
+    (unless (symbolp (car pair))
+      (error 'simple-program-error
+            :format-control "variable ~S in PSETQ is not a SYMBOL"
+            :format-arguments (list (car pair))))))

 
 (defmacro-mundanely lambda (&whole whole args &body body)
   (declare (ignore args body))
   `#',whole)
 
 (defmacro-mundanely lambda (&whole whole args &body body)
   (declare (ignore args body))
   `#',whole)

+
+(defmacro-mundanely named-lambda (&whole whole name args &body body)
+  (declare (ignore name args body))
+  `#',whole)
+
+(defmacro-mundanely lambda-with-lexenv (&whole whole
+                                       declarations macros symbol-macros
+                                       &body body)
+  (declare (ignore declarations macros symbol-macros body))
+  `#',whole)
+
+;;; this eliminates a whole bundle of unknown function STYLE-WARNINGs
+;;; when cross-compiling.  It's not critical for behaviour, but is
+;;; aesthetically pleasing, except inasmuch as there's this list of
+;;; magic functions here.  -- CSR, 2003-04-01
+#+sb-xc-host
+(sb!xc:proclaim '(ftype (function * *)
+                       ;; functions appearing in fundamental defining
+                       ;; macro expansions:
+                       %compiler-deftype
+                       %defun
+                       %defsetf
+                       sb!c:%compiler-defun
+                       sb!c::%define-symbol-macro
+                       sb!c::%defconstant
+                       sb!c::%define-compiler-macro
+                       sb!c::%defmacro
+                       sb!kernel::%compiler-defstruct
+                       sb!kernel::%compiler-define-condition
+                       sb!kernel::%defstruct
+                       sb!kernel::%define-condition
+                       ;; miscellaneous functions commonly appearing
+                       ;; as a result of macro expansions or compiler
+                       ;; transformations:
+                       sb!int:find-undeleted-package-or-lose ; IN-PACKAGE
+                       sb!kernel::arg-count-error ; PARSE-DEFMACRO
+                       ))