X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Feval.lisp;h=1839520ab240530051170fa2e64d222ee3ee6f56;hb=04a651e749befd65ffd8bf49f689b6e7d55607e2;hp=8e67686f8fb0c07537472e47c82b8074a50ce76e;hpb=25d4ea4f108159b9782f21212374a1631cfe9a56;p=sbcl.git diff --git a/src/code/eval.lisp b/src/code/eval.lisp index 8e67686..1839520 100644 --- a/src/code/eval.lisp +++ b/src/code/eval.lisp @@ -11,22 +11,56 @@ (in-package "SB!IMPL") +(defparameter *eval-calls* 0) + +(defun !eval-cold-init () + (setf *eval-calls* 0 + *evaluator-mode* :compile) + #!+sb-eval + (setf sb!eval::*eval-level* -1 + sb!eval::*eval-verbose* nil)) + +(defvar *eval-source-context* nil) + +(defvar *eval-tlf-index* nil) +(defvar *eval-source-info* nil) + +;;;; Turns EXPR into a lambda-form we can pass to COMPILE. Returns +;;;; a secondary value of T if we must call the resulting function +;;;; to evaluate EXPR -- if EXPR is already a lambda form, there's +;;;; no need. +(defun make-eval-lambda (expr) + (if (typep expr `(cons (member lambda named-lambda lambda-with-lexenv))) + (values expr nil) + (values `(lambda () + ;; why PROGN? So that attempts to eval free declarations + ;; signal errors rather than return NIL. -- CSR, 2007-05-01 + (progn ,expr)) + t))) + ;;; general case of EVAL (except in that it can't handle toplevel ;;; EVAL-WHEN magic properly): Delegate to #'COMPILE. -(defun %eval (expr lexenv) - ;; FIXME: It might be nice to quieten the toplevel by muffling - ;; warnings generated by this compilation (since we're about to - ;; execute the results irrespective of the warnings). We might want - ;; to be careful about not muffling warnings arising from inner - ;; evaluations/compilations, though [e.g. the ignored variable in - ;; (DEFUN FOO (X) 1)]. -- CSR, 2003-05-13 - (let ((fun (sb!c:compile-in-lexenv nil - `(lambda () ,expr) - lexenv))) - (funcall fun))) +(defun %simple-eval (expr lexenv) + (multiple-value-bind (lambda call) (make-eval-lambda expr) + (let ((fun + ;; This tells the compiler where the lambda comes from, in case it + ;; wants to report any problems. + (let ((sb!c::*source-form-context-alist* + (acons lambda *eval-source-context* + sb!c::*source-form-context-alist*))) + (handler-bind (;; Compiler notes just clutter up the REPL: + ;; anyone caring about performance should not + ;; be using EVAL. + (compiler-note #'muffle-warning)) + (sb!c:compile-in-lexenv + nil lambda lexenv *eval-source-info* *eval-tlf-index* (not call)))))) + (declare (function fun)) + (if call + (funcall fun) + fun)))) ;;; Handle PROGN and implicit PROGN. -(defun eval-progn-body (progn-body lexenv) +(defun simple-eval-progn-body (progn-body lexenv) (unless (list-with-length-p progn-body) (let ((*print-circle* t)) (error 'simple-program-error @@ -43,10 +77,10 @@ (rest-i (rest i) (rest i))) (nil) (if rest-i ; if not last element of list - (eval-in-lexenv (first i) lexenv) - (return (eval-in-lexenv (first i) lexenv))))) + (simple-eval-in-lexenv (first i) lexenv) + (return (simple-eval-in-lexenv (first i) lexenv))))) -(defun eval-locally (exp lexenv &key vars) +(defun simple-eval-locally (exp lexenv &key vars) (multiple-value-bind (body decls) (parse-body (rest exp) :doc-string-allowed nil) (let ((lexenv @@ -72,29 +106,27 @@ nil :lexenv lexenv :context :eval)))) - (eval-progn-body body lexenv)))) - -(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))) + (simple-eval-progn-body body lexenv)))) ;;;; EVAL-ERROR ;;;; ;;;; Analogous to COMPILER-ERROR, but simpler. -(define-condition eval-error (encapsulated-condition) ()) +(define-condition eval-error (encapsulated-condition) + () + (:report (lambda (condition stream) + (print-object (encapsulated-condition condition) stream)))) (defun eval-error (condition) (signal 'eval-error :condition condition) (bug "Unhandled EVAL-ERROR")) ;;; 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) +;;; magical cases, and call %SIMPLE-EVAL for the rest. +(defun simple-eval-in-lexenv (original-exp lexenv) (declare (optimize (safety 1))) ;; (aver (lexenv-simple-p lexenv)) + (incf *eval-calls*) (handler-bind ((sb!c:compiler-error (lambda (c) @@ -117,9 +149,7 @@ (typecase exp (symbol (ecase (info :variable :kind exp) - (:constant - (values (info :variable :constant-value exp))) - ((:special :global) + ((:special :global :constant :unknown) (symbol-value exp)) ;; FIXME: This special case here is a symptom of non-ANSI ;; weirdness in SBCL's ALIEN implementation, which could @@ -132,7 +162,7 @@ ;; with DEFINE-SYMBOL-MACRO, keeping the code walkers ;; happy. (:alien - (%eval original-exp lexenv)))) + (%simple-eval original-exp lexenv)))) (list (let ((name (first exp)) (n-args (1- (length exp)))) @@ -145,7 +175,11 @@ (not (consp (let ((sb!c:*lexenv* lexenv)) (sb!c:lexenv-find name funs))))) (%coerce-name-to-fun name) - (%eval original-exp lexenv)))) + ;; FIXME: This is a bit wasteful: it would be nice to call + ;; COMPILE-IN-LEXENV with the lambda-form directly, but + ;; getting consistent source context and muffling compiler notes + ;; is easier this way. + (%simple-eval original-exp lexenv)))) ((quote) (unless (= n-args 1) (error "wrong number of args to QUOTE:~% ~S" exp)) @@ -161,19 +195,19 @@ ;; We duplicate the call to SET so that the ;; correct value gets returned. (set (first args) - (eval-in-lexenv (second args) lexenv))) + (simple-eval-in-lexenv (second args) lexenv))) (set (first args) - (eval-in-lexenv (second args) lexenv)))) + (simple-eval-in-lexenv (second args) lexenv)))) (let ((symbol (first name))) (case (info :variable :kind symbol) (:special) - (t (return (%eval original-exp lexenv)))) + (t (return (%simple-eval original-exp lexenv)))) (unless (type= (info :variable :type symbol) *universal-type*) ;; let the compiler deal with type checking - (return (%eval original-exp lexenv))))))) + (return (%simple-eval original-exp lexenv))))))) ((progn) - (eval-progn-body (rest exp) lexenv)) + (simple-eval-progn-body (rest exp) lexenv)) ((eval-when) ;; FIXME: DESTRUCTURING-BIND returns ARG-COUNT-ERROR ;; instead of PROGRAM-ERROR when there's something wrong @@ -200,9 +234,9 @@ ;; PROGN; otherwise, the EVAL-WHEN form returns NIL. (declare (ignore ct lt)) (when e - (eval-progn-body body lexenv))))) + (simple-eval-progn-body body lexenv))))) ((locally) - (eval-locally exp lexenv)) + (simple-eval-locally exp lexenv)) ((macrolet) (destructuring-bind (definitions &rest body) (rest exp) @@ -214,7 +248,7 @@ (declare (ignore funs)) sb!c:*lexenv*) :eval)))) - (eval-locally `(locally ,@body) lexenv)))) + (simple-eval-locally `(locally ,@body) lexenv)))) ((symbol-macrolet) (destructuring-bind (definitions &rest body) (rest exp) (multiple-value-bind (lexenv vars) @@ -224,7 +258,15 @@ (lambda (&key vars) (values sb!c:*lexenv* vars)) :eval)) - (eval-locally `(locally ,@body) lexenv :vars vars)))) + (simple-eval-locally `(locally ,@body) lexenv :vars vars)))) + ((if) + (destructuring-bind (test then &optional else) (rest exp) + (eval-in-lexenv (if (eval-in-lexenv test lexenv) + then + else) + lexenv))) + ((let let*) + (%simple-eval exp lexenv)) (t (if (and (symbolp name) (eq (info :function :kind name) :function)) @@ -232,9 +274,32 @@ (dolist (arg (rest exp)) (args (eval-in-lexenv arg lexenv))) (apply (symbol-function name) (args))) - (%eval exp lexenv)))))) + (%simple-eval exp lexenv)))))) (t exp)))))) + +(defun eval-in-lexenv (exp lexenv) + #!+sb-eval + (if (eq *evaluator-mode* :compile) + (simple-eval-in-lexenv exp lexenv) + (sb!eval:eval-in-native-environment exp lexenv)) + #!-sb-eval + (simple-eval-in-lexenv exp lexenv)) + +(defun eval (original-exp) + #!+sb-doc + "Evaluate the argument in a null lexical environment, returning the + result or results." + (let ((*eval-source-context* original-exp) + (*eval-tlf-index* nil) + (*eval-source-info* nil)) + (eval-in-lexenv original-exp (make-null-lexenv)))) + +(defun eval-tlf (original-exp tlf-index &optional (lexenv (make-null-lexenv))) + (let ((*eval-source-context* original-exp) + (*eval-tlf-index* tlf-index) + (*eval-source-info* sb!c::*source-info*)) + (eval-in-lexenv original-exp lexenv))) ;;; miscellaneous full function definitions of things which are ;;; ordinarily handled magically by the compiler @@ -263,7 +328,7 @@ (defun values (&rest values) #!+sb-doc "Return all arguments, in order, as values." - (declare (dynamic-extent values)) + (declare (truly-dynamic-extent values)) (values-list values)) (defun values-list (list)