diff options
Diffstat (limited to 'lisp/emacs-lisp/macroexp.el')
| -rw-r--r-- | lisp/emacs-lisp/macroexp.el | 106 |
1 files changed, 18 insertions, 88 deletions
diff --git a/lisp/emacs-lisp/macroexp.el b/lisp/emacs-lisp/macroexp.el index 0b19544652a..053db927b67 100644 --- a/lisp/emacs-lisp/macroexp.el +++ b/lisp/emacs-lisp/macroexp.el @@ -238,85 +238,22 @@ It should normally be a symbol with position and it defaults to FORM." form)))))))) (t form))) -(defun sub-macroexp--posify-form (form call-pos depth) - "Try to apply the transformation of `macroexp--posify-form' to FORM. -FORM and CALL-POS are as in that function. DEPTH is a small integer, -decremented at each recursive call, to prevent infinite recursion. -Return the changed form, or nil if no change happened." - (let (new-form) - (cond - ((zerop depth) nil) - ((and (consp form) - (symbolp (car form)) - (car form)) - (setcar form (position-symbol (car form) call-pos)) - form) - ((consp form) - (or (when (setq new-form (sub-macroexp--posify-form - (car form) call-pos (1- depth))) - (setcar form new-form) - form) - (when (setq new-form (sub-macroexp--posify-form - (cdr form) call-pos (1- depth))) - (setcdr form new-form) - form))) - ((symbolp form) - (if form ; Don't position nil! - (position-symbol form call-pos))) - ((and (or (vectorp form) (recordp form))) - (let ((len (length form)) - (i 0) - ) - (while (and (< i len) - (not (setq new-form (sub-macroexp--posify-form - (aref form i) call-pos (1- depth))))) - (setq i (1+ i))) - (when (< i len) - (aset form i new-form) - form)))))) - -(defun macroexp--posify-form (form call-pos) - "Try to apply the position CALL-POS to the form FORM. -CALL-POS is a buffer position, a number. FORM may be any lisp form, -and is typically the output form returned by macro expansion. -Apply CALL-POS to FORM as a symbol with position, such that -`byte-compile--first-symbol-with-pos' can later return it. Return -the possibly modified FORM." - (let ((new-form (sub-macroexp--posify-form form call-pos 10))) - (or new-form form))) - -(defmacro macroexp-preserve-posification (pos-form &rest body) - "Evaluate BODY..., posifying the result with POS-FORM's position, if any." - `(let ((call-pos (cond - ((consp ,pos-form) - (and (symbol-with-pos-p (car ,pos-form)) - (symbol-with-pos-pos (car ,pos-form)))) - ((symbol-with-pos-p ,pos-form) - (symbol-with-pos-pos ,pos-form)))) - (new-value (progn ,@body))) - (if call-pos - (macroexp--posify-form new-value call-pos) - new-value))) - (defun macroexp-macroexpand (form env) "Like `macroexpand' but checking obsolescence." (let* ((macroexpand-all-environment env) new-form) - (macroexp-preserve-posification - form - (while (not (eq form (setq new-form (macroexpand-1 form env)))) - (setq macroexpanded t) - (let ((fun (car-safe form))) - (setq form - (if (and fun (symbolp fun) - (get fun 'byte-obsolete-info)) - (macroexp-warn-and-return - (macroexp--obsolete-warning - fun (get fun 'byte-obsolete-info) - (if (symbolp (symbol-function fun)) "alias" "macro")) - new-form (list 'obsolete fun) nil fun) - new-form)))) - new-form))) + (while (not (eq form (setq new-form (macroexpand-1 form env)))) + (let ((fun (car-safe form))) + (setq form + (if (and fun (symbolp fun) + (get fun 'byte-obsolete-info)) + (macroexp-warn-and-return + (macroexp--obsolete-warning + fun (get fun 'byte-obsolete-info) + (if (symbolp (symbol-function fun)) "alias" "macro")) + new-form (list 'obsolete fun) nil fun) + new-form)))) + form)) (defun macroexp--unfold-lambda (form &optional name) (or name (setq name "anonymous lambda")) @@ -580,21 +517,14 @@ Assumes the caller has bound `macroexpand-all-environment'." (_ form)))))) ;;;###autoload -(defun macroexpand-all (form &optional environment keep-pos) +(defun macroexpand-all (form &optional environment) "Return result of expanding macros at all levels in FORM. -If no macros are expanded, FORM is returned unchanged. The second -optional arg ENVIRONMENT specifies an environment of macro definitions -to shadow the loaded ones for use in file byte-compilation. KEEP-POS, -if non-nil, specifies that any symbol-with-position for FORM should be -preserved, later to be usable by `byte-compile--warning-source-offset'." - (let* - ((macroexpand-all-environment environment) +If no macros are expanded, FORM is returned unchanged. +The second optional arg ENVIRONMENT specifies an environment of macro +definitions to shadow the loaded ones for use in file byte-compilation." + (let ((macroexpand-all-environment environment) (macroexp--dynvars macroexp--dynvars)) - (if keep-pos - (macroexp-preserve-posification - form - (macroexp--expand-all form)) - (macroexp--expand-all form)))) + (macroexp--expand-all form))) ;; This function is like `macroexpand-all' but for use with top-level ;; forms. It does not dynbind `macroexp--dynvars' because we want |