diff options
Diffstat (limited to 'lisp/emacs-lisp/bytecomp.el')
| -rw-r--r-- | lisp/emacs-lisp/bytecomp.el | 92 |
1 files changed, 45 insertions, 47 deletions
diff --git a/lisp/emacs-lisp/bytecomp.el b/lisp/emacs-lisp/bytecomp.el index 68e2fd1d104..0b8f8824b4c 100644 --- a/lisp/emacs-lisp/bytecomp.el +++ b/lisp/emacs-lisp/bytecomp.el @@ -124,17 +124,10 @@ (require 'backquote) (require 'macroexp) (require 'cconv) -(require 'cl-lib) - -;; During bootstrap, cl-loaddefs.el is not created yet, so loading cl-lib -;; doesn't setup autoloads for things like cl-every, which is why we have to -;; require cl-extra as well (bug#18804). -(or (fboundp 'cl-every) - (require 'cl-extra)) - -(or (fboundp 'defsubst) - ;; This really ought to be loaded already! - (load "byte-run")) +;; Refrain from using cl-lib at run-time here, since it otherwise prevents +;; us from emitting warnings when compiling files which use cl-lib without +;; requiring it! (bug#30635) +(eval-when-compile (require 'cl-lib)) ;; The feature of compiling in a specific target Emacs version ;; has been turned off because compile time options are a bad idea. @@ -842,7 +835,7 @@ all the arguments. (defmacro byte-compile-push-bytecode-const2 (opcode const2 bytes pc) "Push OPCODE and the two-byte constant CONST2 onto BYTES, and add 3 to PC. CONST2 may be evaluated multiple times." - `(byte-compile-push-bytecodes ,opcode (logand ,const2 255) (lsh ,const2 -8) + `(byte-compile-push-bytecodes ,opcode (logand ,const2 255) (ash ,const2 -8) ,bytes ,pc)) (defun byte-compile-lapcode (lap) @@ -932,9 +925,9 @@ CONST2 may be evaluated multiple times." ;; Splits PC's value into 2 bytes. The jump address is ;; "reconstructed" by the `FETCH2' macro in `bytecode.c'. (setcar (cdr bytes-tail) (logand pc 255)) - (setcar bytes-tail (lsh pc -8)) + (setcar bytes-tail (ash pc -8)) ;; FIXME: Replace this by some workaround. - (if (> (car bytes-tail) 255) (error "Bytecode overflow"))) + (or (<= 0 (car bytes-tail) 255) (error "Bytecode overflow"))) ;; Similarly, replace TAGs in all jump tables with the correct PC index. (dolist (hash-table byte-compile-jump-tables) @@ -1938,17 +1931,7 @@ The value is non-nil if there were no errors, nil if errors." ;; parallel bootstrap), it does not risk getting a ;; half-finished file. (Bug#4196) (tempfile - (if (file-name-absolute-p target-file) - (make-temp-file target-file) - ;; If target-file is relative and includes - ;; leading directories, make-temp-file will - ;; assume those leading directories exist - ;; under temporary-file-directory, which might - ;; not be true. So strip leading directories - ;; from relative file names before calling - ;; make-temp-file. - (make-temp-file - (file-name-nondirectory target-file)))) + (make-temp-file (expand-file-name target-file))) (default-modes (default-file-modes)) (temp-modes (logand default-modes #o600)) (desired-modes (logand default-modes #o666)) @@ -2079,14 +2062,8 @@ With argument ARG, insert value in current buffer after the form." (not (eobp))) (setq byte-compile-read-position (point) byte-compile-last-position byte-compile-read-position) - (let* ((lread--old-style-backquotes nil) - (lread--unescaped-character-literals nil) + (let* ((lread--unescaped-character-literals nil) (form (read inbuffer))) - ;; Warn about the use of old-style backquotes. - (when lread--old-style-backquotes - (byte-compile-warn "!! The file uses old-style backquotes !! -This functionality has been obsolete for more than 10 years already -and will be removed soon. See (elisp)Backquote in the manual.")) (when lread--unescaped-character-literals (byte-compile-warn "unescaped character literals %s detected!" @@ -2449,6 +2426,16 @@ list that represents a doc string reference. (defun byte-compile-file-form-defvar-function (form) (pcase-let (((or `',name (let name nil)) (nth 1 form))) (if name (byte-compile--declare-var name))) + ;; Variable aliases are better declared before the corresponding variable, + ;; since it makes it more likely that only one of the two vars has a value + ;; before the `defvaralias' gets executed, which avoids the need to + ;; merge values. + (pcase form + (`(defvaralias ,_ ',newname . ,_) + (when (memq newname byte-compile-bound-variables) + (if (byte-compile-warning-enabled-p 'suspicious) + (byte-compile-warn + "Alias for `%S' should be declared before its referent" newname))))) (byte-compile-keep-pending form)) (put 'custom-declare-variable 'byte-hunk-handler @@ -2508,6 +2495,12 @@ list that represents a doc string reference. (mapc 'byte-compile-file-form (cdr form)) nil)) +;; Automatically evaluate define-obsolete-function-alias etc at top-level. +(put 'make-obsolete 'byte-hunk-handler 'byte-compile-file-form-make-obsolete) +(defun byte-compile-file-form-make-obsolete (form) + (prog1 (byte-compile-keep-pending form) + (apply 'make-obsolete (mapcar 'eval (cdr form))))) + ;; This handler is not necessary, but it makes the output from dont-compile ;; and similar macros cleaner. (put 'eval 'byte-hunk-handler 'byte-compile-file-form-eval) @@ -2754,15 +2747,12 @@ If FORM is a lambda or a macro, byte-compile it as a function." (macroexp--const-symbol-p arg t)) (error "Invalid lambda variable %s" arg)) ((eq arg '&rest) - (unless (cdr list) - (error "&rest without variable name")) (when (cddr list) - (error "Garbage following &rest VAR in lambda-list"))) + (error "Garbage following &rest VAR in lambda-list")) + (when (memq (cadr list) '(&optional &rest)) + (error "%s following &rest in lambda-list" (cadr list)))) ((eq arg '&optional) - (when (or (null (cdr list)) - (memq (cadr list) '(&optional &rest))) - (error "Variable name missing after &optional")) - (when (memq '&optional (cddr list)) + (when (memq '&optional (cdr list)) (error "Duplicate &optional"))) ((memq arg vars) (byte-compile-warn "repeated variable %s in lambda-list" arg)) @@ -2803,8 +2793,8 @@ If FORM is a lambda or a macro, byte-compile it as a function." (if (> mandatory 127) (byte-compile-report-error "Too many (>127) mandatory arguments") (logior mandatory - (lsh nonrest 8) - (lsh rest 7))))) + (ash nonrest 8) + (ash rest 7))))) (defun byte-compile-lambda (fun &optional add-lambda reserved-csts) @@ -2855,9 +2845,10 @@ for symbols generated by the byte compiler itself." (setq form (cdr form))) (setq form (car form))) (if (and (eq (car-safe form) 'list) - ;; The spec is evalled in callint.c in dynamic-scoping - ;; mode, so just leaving the form unchanged would mean - ;; it won't be eval'd in the right mode. + ;; For code using lexical-binding, form is not + ;; valid lisp, but rather an intermediate form + ;; which may include "calls" to + ;; internal-make-closure (Bug#29988). (not lexical-binding)) nil (setq int `(interactive ,newform))))) @@ -3128,7 +3119,13 @@ for symbols generated by the byte compiler itself." (when (assq var byte-compile-lexical-variables) (byte-compile-report-error (format-message "%s cannot use lexical var `%s'" fn var)))))) - (when (macroexp--const-symbol-p fn) + ;; Warn about using obsolete hooks. + (if (memq fn '(add-hook remove-hook)) + (let ((hook (car-safe (cdr form)))) + (if (eq (car-safe hook) 'quote) + (byte-compile-check-variable (cadr hook) nil)))) + (when (and (byte-compile-warning-enabled-p 'suspicious) + (macroexp--const-symbol-p fn)) (byte-compile-warn "`%s' called as a function" fn)) (when (and (byte-compile-warning-enabled-p 'interactive-only) interactive-only) @@ -3261,7 +3258,7 @@ for symbols generated by the byte compiler itself." (fun (car form)) (fargs (aref fun 0)) (start-depth byte-compile-depth) - (fmax2 (if (numberp fargs) (lsh fargs -7))) ;2*max+rest. + (fmax2 (if (numberp fargs) (ash fargs -7))) ;2*max+rest. ;; (fmin (if (numberp fargs) (logand fargs 127))) (alen (length (cdr form))) (dynbinds ()) @@ -3585,7 +3582,8 @@ These implicitly `and' together a bunch of two-arg bytecodes." (cond ((< l 3) (byte-compile-form `(progn ,(nth 1 form) t))) ((= l 3) (byte-compile-two-args form)) - ((cl-every #'macroexp-copyable-p (nthcdr 2 form)) + ;; Don't use `cl-every' here (see comment where we require cl-lib). + ((not (memq nil (mapcar #'macroexp-copyable-p (nthcdr 2 form)))) (byte-compile-form `(and (,(car form) ,(nth 1 form) ,(nth 2 form)) (,(car form) ,@(nthcdr 2 form))))) (t (byte-compile-normal-call form))))) |