X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Fearly-type.lisp;h=6f341915618401c20283ddb22f05d281fa746f3a;hb=01044af1b8d69fc3899dc0417064c1512223223d;hp=6065f6be000699221308c0068151f6ea40f1768e;hpb=4d8378af498b544256340e09919758e1f88029ac;p=sbcl.git diff --git a/src/code/early-type.lisp b/src/code/early-type.lisp index 6065f6b..6f34191 100644 --- a/src/code/early-type.lisp +++ b/src/code/early-type.lisp @@ -11,10 +11,6 @@ (!begin-collecting-cold-init-forms) -;;; Has the type system been properly initialized? (I.e. is it OK to -;;; use it?) -(defvar *type-system-initialized* #+sb-xc-host nil) ; (set in cold load) - ;;;; representations of types ;;; A HAIRY-TYPE represents anything too weird to be described @@ -68,20 +64,28 @@ (allowp nil :type boolean)) (defun canonicalize-args-type-args (required optional rest) - (when rest - (let ((last-distinct-optional (position rest optional - :from-end t - :test-not #'type=))) - (setf optional - (when last-distinct-optional - (subseq optional 0 (1+ last-distinct-optional)))))) - (values required optional rest)) + (when (eq rest *empty-type*) + ;; or vice-versa? + (setq rest nil)) + (loop with last-not-rest = nil + for i from 0 + for opt in optional + do (cond ((eq opt *empty-type*) + (return (values required (subseq optional i) rest))) + ((neq opt rest) + (setq last-not-rest i))) + finally (return (values required + (if last-not-rest + (subseq optional 0 (1+ last-not-rest)) + nil) + rest)))) (defun args-types (lambda-list-like-thing) (multiple-value-bind - (required optional restp rest keyp keys allowp auxp aux) + (required optional restp rest keyp keys allowp auxp aux + morep more-context more-count llk-p) (parse-lambda-list-like-thing lambda-list-like-thing) - (declare (ignore aux)) + (declare (ignore aux morep more-context more-count)) (when auxp (error "&AUX in a FUNCTION or VALUES type: ~S." lambda-list-like-thing)) (let ((required (mapcar #'single-value-specifier-type required)) @@ -103,40 +107,76 @@ (key-info)))) (multiple-value-bind (required optional rest) (canonicalize-args-type-args required optional rest) - (values required optional rest keyp keywords allowp))))) - + (values required optional rest keyp keywords allowp llk-p))))) + (defstruct (values-type (:include args-type (class-info (type-class-or-lose 'values))) (:constructor %make-values-type) (:copier nil))) -(defun make-values-type (&rest initargs - &key (args nil argsp) &allow-other-keys) +(defun-cached (make-values-type-cached + :hash-bits 8 + :hash-function (lambda (req opt rest allowp) + (logand (logxor + (type-list-cache-hash req) + (type-list-cache-hash opt) + (if rest + (type-hash-value rest) + 42) + (sxhash allowp)) + #xFF))) + ((required equal-but-no-car-recursion) + (optional equal-but-no-car-recursion) + (rest eq) + (allowp eq)) + (%make-values-type :required required + :optional optional + :rest rest + :allowp allowp)) + +(defun make-values-type (&key (args nil argsp) + required optional rest allowp) (if argsp (if (eq args '*) *wild-type* - (multiple-value-bind (required optional rest keyp keywords allowp) + (multiple-value-bind (required optional rest keyp keywords allowp + llk-p) (args-types args) - (if (and (null required) - (null optional) - (eq rest *universal-type*) - (not keyp)) - *wild-type* - (%make-values-type :required required - :optional optional - :rest rest - :keyp keyp - :keywords keywords - :allowp allowp)))) - (apply #'%make-values-type initargs))) + (declare (ignore keywords)) + (when keyp + (error "&KEY appeared in a VALUES type specifier ~S." + `(values ,@args))) + (if llk-p + (make-values-type :required required + :optional optional + :rest rest + :allowp allowp) + (make-short-values-type required)))) + (multiple-value-bind (required optional rest) + (canonicalize-args-type-args required optional rest) + (cond ((and (null required) + (null optional) + (eq rest *universal-type*)) + *wild-type*) + ((memq *empty-type* required) + *empty-type*) + (t (make-values-type-cached required optional + rest allowp)))))) (!define-type-class values) ;;; (SPECIFIER-TYPE 'FUNCTION) and its subtypes (defstruct (fun-type (:include args-type (class-info (type-class-or-lose 'function))) - (:constructor %make-fun-type)) + (:constructor + %make-fun-type (&key required optional rest + keyp keywords allowp + wild-args + returns + &aux (rest (if (eq rest *empty-type*) + nil + rest))))) ;; true if the arguments are unrestrictive, i.e. * (wild-args nil :type boolean) ;; type describing the return values. This is a values type @@ -260,22 +300,6 @@ (if (consp high) (1- (type-bound-number high)) high))) - #!+negative-zero-is-not-zero - (float - ;; Canonicalize a low bound of (-0.0) to 0.0, and a high - ;; bound of (+0.0) to -0.0. - (values (if (and (consp low) - (floatp (car low)) - (zerop (car low)) - (minusp (float-sign (car low)))) - (float 0.0 (car low)) - low) - (if (and (consp high) - (floatp (car high)) - (zerop (car high)) - (plusp (float-sign (car high)))) - (float -0.0 (car high)) - high))) (t ;; no canonicalization necessary (values low high))) @@ -307,7 +331,7 @@ :enumerable enumerable)) ;;; An ARRAY-TYPE is used to represent any array type, including -;;; things such as SIMPLE-STRING. +;;; things such as SIMPLE-BASE-STRING. (defstruct (array-type (:include ctype (class-info (type-class-or-lose 'array))) (:constructor %make-array-type) @@ -342,22 +366,22 @@ ;; canonicalize to (DOUBLE-FLOAT 0.0d0 0.0d0), because numeric ;; ranges are compared by arithmetic operators (while MEMBERship is ;; compared by EQL). -- CSR, 2003-04-23 - (let ((singlep (subsetp '(-0.0f0 0.0f0) members)) - (doublep (subsetp '(-0.0d0 0.0d0) members)) + (let ((singlep (subsetp `(,(load-time-value (make-unportable-float :single-float-negative-zero)) 0.0f0) members)) + (doublep (subsetp `(,(load-time-value (make-unportable-float :double-float-negative-zero)) 0.0d0) members)) #!+long-float - (longp (subsetp '(-0.0l0 0.0l0) members))) + (longp (subsetp `(,(load-time-value (make-unportable-float :long-float-negative-zero)) 0.0l0) members))) (if (or singlep doublep #!+long-float longp) (let (union-types) (when singlep (push (ctype-of 0.0f0) union-types) - (setf members (set-difference members '(-0.0f0 0.0f0)))) + (setf members (set-difference members `(,(load-time-value (make-unportable-float :single-float-negative-zero)) 0.0f0)))) (when doublep (push (ctype-of 0.0d0) union-types) - (setf members (set-difference members '(-0.0d0 0.0d0)))) + (setf members (set-difference members `(,(load-time-value (make-unportable-float :double-float-negative-zero)) 0.0d0)))) #!+long-float (when longp (push (ctype-of 0.0l0) union-types) - (setf members (set-difference members '(-0.0l0 0.0l0)))) + (setf members (set-difference members `(,(load-time-value (make-unportable-float :long-float-negative-zero)) 0.0l0)))) (aver (not (null union-types))) (make-union-type t (if (null members) @@ -417,17 +441,8 @@ ;;; A CONS-TYPE is used to represent a CONS type. (defstruct (cons-type (:include ctype (class-info (type-class-or-lose 'cons))) (:constructor - ;; ANSI says that for CAR and CDR subtype - ;; specifiers '* is equivalent to T. In order - ;; to avoid special cases in SUBTYPEP and - ;; possibly elsewhere, we slam all CONS-TYPE - ;; objects into canonical form w.r.t. this - ;; equivalence at creation time. - %make-cons-type (car-raw-type - cdr-raw-type - &aux - (car-type (type-*-to-t car-raw-type)) - (cdr-type (type-*-to-t cdr-raw-type)))) + %make-cons-type (car-type + cdr-type)) (:copier nil)) ;; the CAR and CDR element types (to support ANSI (CONS FOO BAR) types) ;; @@ -435,10 +450,30 @@ (car-type (missing-arg) :type ctype :read-only t) (cdr-type (missing-arg) :type ctype :read-only t)) (defun make-cons-type (car-type cdr-type) + (aver (not (or (eq car-type *wild-type*) + (eq cdr-type *wild-type*)))) (if (or (eq car-type *empty-type*) (eq cdr-type *empty-type*)) *empty-type* (%make-cons-type car-type cdr-type))) + +(defun cons-type-length-info (type) + (declare (type cons-type type)) + (do ((min 1 (1+ min)) + (cdr (cons-type-cdr-type type) (cons-type-cdr-type cdr))) + ((not (cons-type-p cdr)) + (cond + ((csubtypep cdr (specifier-type 'null)) + (values min t)) + ((csubtypep *universal-type* cdr) + (values min nil)) + ((type/= (type-intersection (specifier-type 'cons) cdr) *empty-type*) + (values min nil)) + ((type/= (type-intersection (specifier-type 'null) cdr) *empty-type*) + (values min t)) + (t (values min :maybe)))) + ())) + ;;;; type utilities @@ -471,18 +506,16 @@ (or (built-in-classoid-translation spec) spec) spec)) (t - (let* (;; FIXME: This automatic promotion of FOO-style - ;; specs to (FOO)-style specs violates the ANSI - ;; standard. Unfortunately, we can't fix the - ;; problem just by removing it, since then things - ;; downstream should break. But at some point we - ;; should fix this and the things downstream too. - (lspec (if (atom spec) (list spec) spec)) + (when (and (atom spec) + (member spec '(and or not member eql satisfies values))) + (error "The symbol ~S is not valid as a type specifier." spec)) + (let* ((lspec (if (atom spec) (list spec) spec)) (fun (info :type :translator (car lspec)))) (cond (fun (funcall fun lspec)) - ((or (and (consp spec) (symbolp (car spec))) - (symbolp spec)) + ((or (and (consp spec) (symbolp (car spec)) + (not (info :type :builtin (car spec)))) + (and (symbolp spec) (not (info :type :builtin spec)))) (when (and *type-system-initialized* (not (eq (info :type :kind spec) :forthcoming-defclass-type))) @@ -498,15 +531,17 @@ ;;; never return a VALUES type. (defun specifier-type (x) (let ((res (values-specifier-type x))) - (when (values-type-p res) + (when (or (values-type-p res) + ;; bootstrap magic :-( + (and (named-type-p res) + (eq (named-type-name res) '*))) (error "VALUES type illegal in this context:~% ~S" x)) res)) (defun single-value-specifier-type (x) - (let ((res (specifier-type x))) - (if (eq res *wild-type*) - *universal-type* - res))) + (if (eq x '*) + *universal-type* + (specifier-type x))) ;;; Similar to MACROEXPAND, but expands DEFTYPEs. We don't bother ;;; returning a second value. @@ -514,7 +549,7 @@ (let ((def (cond ((symbolp form) (info :type :expander form)) ((and (consp form) (symbolp (car form))) - (info :type :expander (car form))) + (info :type :expander (car form))) (t nil)))) (if def (type-expand (funcall def (if (consp form) form (list form)))) @@ -528,5 +563,6 @@ (when (boundp 'sb!kernel::*values-specifier-type-cache-vector*) (values-specifier-type-cache-clear)) (values)) + (!defun-from-collected-cold-init-forms !early-type-cold-init)