X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Feval.lisp;h=f8ef5b0bccab8ff03939912a23e9156f7c977eeb;hb=a260738d7a71680079d972b102b4e4db4e8dc3ae;hp=3e301286fd6f35b57338cd69b08bc97d3c421786;hpb=f143939b1dbaf38ebd4f92c851fbc4ecddf37af1;p=sbcl.git diff --git a/src/code/eval.lisp b/src/code/eval.lisp index 3e30128..f8ef5b0 100644 --- a/src/code/eval.lisp +++ b/src/code/eval.lisp @@ -13,29 +13,15 @@ ;;; general case of EVAL (except in that it can't handle toplevel ;;; EVAL-WHEN magic properly): Delegate to #'COMPILE. -(defun %eval (expr) - (funcall (compile (gensym "EVAL-TMPFUN-") - `(lambda () - - ;; The user can reasonably expect that the - ;; interpreter will be safe. - (declare (optimize (safety 3))) - - ;; It's also good if the interpreter doesn't - ;; spend too long thinking about each input - ;; form, since if the user'd wanted the - ;; tradeoff to favor quality of compiled code - ;; over compilation speed, he'd've explicitly - ;; asked for compilation. - (declare (optimize (compilation-speed 2))) - - ;; Other properties are relatively unimportant. - (declare (optimize (speed 1) (debug 1) (space 1))) - - ,expr)))) +(defun %eval (expr lexenv) + (funcall (sb!c:compile-in-lexenv + (gensym "EVAL-TMPFUN-") + `(lambda () + ,expr) + lexenv))) ;;; Handle PROGN and implicit PROGN. -(defun eval-progn-body (progn-body) +(defun eval-progn-body (progn-body lexenv) (unless (list-with-length-p progn-body) (let ((*print-circle* t)) (error 'simple-program-error @@ -52,17 +38,21 @@ (rest-i (rest i) (rest i))) (nil) (if rest-i ; if not last element of list - (eval (first i)) - (return (eval (first i)))))) + (eval-in-lexenv (first i) lexenv) + (return (eval-in-lexenv (first i) lexenv))))) -;;; Pick off a few easy cases, and the various top-level EVAL-WHEN -;;; magical cases, and call %EVAL for the rest. (defun eval (original-exp) #!+sb-doc "Evaluate the argument in a null lexical environment, returning the result or results." + (eval-in-lexenv original-exp (make-null-lexenv))) + +;;; Pick off a few easy cases, and the various top level EVAL-WHEN +;;; magical cases, and call %EVAL for the rest. +(defun eval-in-lexenv (original-exp lexenv) (declare (optimize (safety 1))) - (let ((exp (macroexpand original-exp))) + ;; (aver (lexenv-simple-p lexenv)) + (let ((exp (macroexpand original-exp lexenv))) (typecase exp (symbol (ecase (info :variable :kind exp) @@ -80,21 +70,23 @@ ;; compatibility, it can be implemented with ;; DEFINE-SYMBOL-MACRO, keeping the code walkers happy. (:alien - (%eval original-exp)))) + (%eval original-exp lexenv)))) (list (let ((name (first exp)) (n-args (1- (length exp)))) (case name - (function + ((function) (unless (= n-args 1) (error "wrong number of args to FUNCTION:~% ~S" exp)) (let ((name (second exp))) - (if (or (atom name) - (and (consp name) - (eq (car name) 'setf))) + (if (and (or (atom name) + (and (consp name) + (eq (car name) 'setf))) + (not (consp (let ((sb!c:*lexenv* lexenv)) + (sb!c:lexenv-find name funs))))) (fdefinition name) - (%eval original-exp)))) - (quote + (%eval original-exp lexenv)))) + ((quote) (unless (= n-args 1) (error "wrong number of args to QUOTE:~% ~S" exp)) (second exp)) @@ -112,23 +104,23 @@ (set (first args) (eval (second args))))) (let ((symbol (first name))) (case (info :variable :kind symbol) - ;; FIXME: I took out the *TOP-LEVEL-AUTO-DECLARE* - ;; test here, and removed the *TOP-LEVEL-AUTO-DECLARE* + ;; FIXME: I took out the *TOPLEVEL-AUTO-DECLARE* + ;; test here, and removed the *TOPLEVEL-AUTO-DECLARE* ;; variable; the code should now act as though that ;; variable is NIL. This should be tested.. (:special) - (t (return (%eval original-exp)))))))) + (t (return (%eval original-exp lexenv)))))))) ((progn) - (eval-progn-body (rest exp))) + (eval-progn-body (rest exp) lexenv)) ((eval-when) - ;; FIXME: DESTRUCTURING-BIND returns - ;; DEFMACRO-LL-ARG-COUNT-ERROR instead of PROGRAM-ERROR - ;; when there's something wrong with the syntax here (e.g. - ;; missing SITUATIONS). This could be fixed by - ;; hand-crafting clauses to catch and report each - ;; possibility, but it would probably be cleaner to write - ;; a new macro DESTRUCTURING-BIND-PROGRAM-SYNTAX which - ;; does DESTRUCTURING-BIND and promotes any mismatch to + ;; FIXME: DESTRUCTURING-BIND returns ARG-COUNT-ERROR + ;; instead of PROGRAM-ERROR when there's something wrong + ;; with the syntax here (e.g. missing SITUATIONS). This + ;; could be fixed by hand-crafting clauses to catch and + ;; report each possibility, but it would probably be + ;; cleaner to write a new macro + ;; DESTRUCTURING-BIND-PROGRAM-SYNTAX which does + ;; DESTRUCTURING-BIND and promotes any mismatch to ;; PROGRAM-ERROR, then to use it here and in (probably ;; dozens of) other places where the same problem arises. (destructuring-bind (eval-when situations &rest body) exp @@ -145,43 +137,76 @@ ;; otherwise, the EVAL-WHEN form returns NIL. (declare (ignore ct lt)) (when e - (eval-progn-body body))))) + (eval-progn-body body lexenv))))) + ((locally) + (multiple-value-bind (body decls) (parse-body (rest exp) nil) + (let ((lexenv + ;; KLUDGE: Uh, yeah. I'm not anticipating + ;; winning any prizes for this code, which was + ;; written on a "let's get it to work" basis. + ;; These seem to be the variables that need + ;; bindings for PROCESS-DECLS to work + ;; (*FREE-FUNS* and *FREE-VARS* so that + ;; references to free functions and variables in + ;; the declarations can be noted; + ;; *UNDEFINED-WARNINGS* so that warnings about + ;; undefined things can be accumulated [and then + ;; thrown away, as it happens]). -- CSR, 2002-10-24 + (let ((sb!c:*lexenv* lexenv) + (sb!c::*free-funs* (make-hash-table :test 'equal)) + (sb!c::*free-vars* (make-hash-table :test 'eq)) + (sb!c::*undefined-warnings* nil)) + (sb!c::process-decls decls + nil nil + (sb!c::make-continuation) + lexenv)))) + (eval-progn-body body lexenv)))) + ((macrolet) + (destructuring-bind (definitions &rest body) + (rest exp) + ;; FIXME: shared code with FUNCALL-IN-FOOMACROLET-LEXENV + (declare (type list definitions)) + (unless (= (length definitions) + (length (remove-duplicates definitions :key #'first))) + (style-warn "duplicate definitions in ~S" definitions)) + (let ((lexenv + (sb!c::make-lexenv + :default lexenv + :funs (mapcar + (sb!c::macrolet-definitionize-fun + :eval + ;; I'm not sure that this is the correct + ;; LEXENV to be compiling local macros + ;; in... + lexenv) + definitions)))) + (eval-in-lexenv `(locally ,@body) lexenv)))) + ((symbol-macrolet) + (destructuring-bind (definitions &rest body) + (rest exp) + ;; FIXME: shared code with FUNCALL-IN-FOOMACROLET-LEXENV + (declare (type list definitions)) + (unless (= (length definitions) + (length (remove-duplicates definitions :key #'first))) + (style-warn "duplicate definitions in ~S" definitions)) + (let ((lexenv + (sb!c::make-lexenv + :default lexenv + :vars (mapcar + (sb!c::symbol-macrolet-definitionize-fun + :eval) + definitions)))) + (eval-in-lexenv `(locally ,@body) lexenv)))) (t (if (and (symbolp name) (eq (info :function :kind name) :function)) (collect ((args)) - (dolist (arg (rest exp)) - (args (eval arg))) - (apply (symbol-function name) (args))) - (%eval original-exp)))))) + (dolist (arg (rest exp)) + (args (eval-in-lexenv arg lexenv))) + (apply (symbol-function name) (args))) + (%eval exp lexenv)))))) (t exp)))) - -(defun function-lambda-expression (fun) - "Return (VALUES DEFINING-LAMBDA-EXPRESSION CLOSURE-P NAME), where - DEFINING-LAMBDA-EXPRESSION is NIL if unknown, or a suitable argument - to COMPILE otherwise, CLOSURE-P is non-NIL if the function's definition - might have been enclosed in some non-null lexical environment, and - NAME is some name (for debugging only) or NIL if there is no name." - (declare (type function fun)) - (let* ((fun (%simple-fun-self fun)) - (name (%simple-fun-name fun)) - (code (sb!di::fun-code-header fun)) - (info (sb!kernel:%code-debug-info code))) - (if info - (let ((source (first (sb!c::compiled-debug-info-source info)))) - (cond ((and (eq (sb!c::debug-source-from source) :lisp) - (eq (sb!c::debug-source-info source) fun)) - (values (second (svref (sb!c::debug-source-name source) 0)) - nil name)) - ((stringp name) - (values nil t name)) - (t - (let ((exp (info :function :inline-expansion name))) - (if exp - (values exp nil name) - (values nil t name)))))) - (values nil t name)))) ;;; miscellaneous full function definitions of things which are ;;; ordinarily handled magically by the compiler