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File 2286-Emacs-Consider-arity-when-jumping-to-definitions.patch of Package erlang
From 1607c07f41a8ff0d87d982fefab6e0c0009d83c3 Mon Sep 17 00:00:00 2001 From: Johan Claesson <johanclaesson@bredband.net> Date: Fri, 30 Dec 2016 12:20:01 +0100 Subject: [PATCH 1/2] Emacs: Consider arity when jumping to definitions Only the xref front-end introduced in Emacs 25 consider arity. It is not implemented for older emacsen. Look for manual page files in lib/erlang/man in erlang-root-dir. Also do not give up in erlang-man-module when not finding the manual page file. Call manual-entry as a fallback. Do not bother to populate menu-bar with man pages when menu-bar-mode is nil. Add erlang extensions also to dired-omit-extensions. Remove some support for Emacs 18 and 19. --- lib/tools/emacs/erlang-start.el | 11 +- lib/tools/emacs/erlang-test.el | 51 ++- lib/tools/emacs/erlang.el | 668 +++++++++++++++++++++++++++------------- 3 files changed, 492 insertions(+), 238 deletions(-) diff --git a/lib/tools/emacs/erlang-start.el b/lib/tools/emacs/erlang-start.el index 66bd3dd3a..c35f280bf 100644 --- a/lib/tools/emacs/erlang-start.el +++ b/lib/tools/emacs/erlang-start.el @@ -115,18 +115,15 @@ A function suitable for `eldoc-documentation-function'.\n\n(fn)" nil nil) ;; ;; Ignore files ending in ".jam", ".vee", and ".beam" when performing -;; file completion. +;; file completion and in dired omit mode. ;; ;;;###autoload (let ((erl-ext '(".jam" ".vee" ".beam"))) (while erl-ext - (let ((cie completion-ignored-extensions)) - (while (and cie (not (string-equal (car cie) (car erl-ext)))) - (setq cie (cdr cie))) - (if (null cie) - (setq completion-ignored-extensions - (cons (car erl-ext) completion-ignored-extensions)))) + (add-to-list 'completion-ignored-extensions (car erl-ext)) + (when (boundp 'dired-omit-extensions) + (add-to-list 'dired-omit-extensions (car erl-ext))) (setq erl-ext (cdr erl-ext)))) diff --git a/lib/tools/emacs/erlang-test.el b/lib/tools/emacs/erlang-test.el index ba6190d19..cd02007c7 100644 --- a/lib/tools/emacs/erlang-test.el +++ b/lib/tools/emacs/erlang-test.el @@ -2,7 +2,7 @@ ;;; Unit tests for erlang.el. -;; Author: Johan Claesson +;; Author: Johan Claesson ;; Created: 2016-05-07 ;; Keywords: erlang, languages @@ -59,11 +59,12 @@ concatenated to form an erlang file to test on.") tags-file-name tags-table-list tags-table-set-list + tags-add-tables + tags-completion-table erlang-buffer erlang-mode-hook prog-mode-hook - erlang-shell-mode-hook - tags-add-tables) + erlang-shell-mode-hook) (unwind-protect (progn (setq-default tags-file-name nil) @@ -117,12 +118,20 @@ concatenated to form an erlang file to test on.") for line = 1 then (1+ line) do (when tagname (switch-to-buffer erlang-buffer) - (xref-find-definitions tagname) - (erlang-test-verify-pos erlang-file line) - (xref-find-definitions (concat "erlang_test:" tagname)) - (erlang-test-verify-pos erlang-file line))) - (xref-find-definitions "erlang_test:") - (erlang-test-verify-pos erlang-file 1)) + (erlang-test-xref-jump tagname erlang-file line) + (erlang-test-xref-jump (concat "erlang_test:" tagname) + erlang-file line))) + (erlang-test-xref-jump "erlang_test:" erlang-file 1)) + +(defun erlang-test-xref-jump (id expected-file expected-line) + (goto-char (point-max)) + (insert "\n%% " id) + (save-buffer) + (if (fboundp 'xref-find-definitions) + (xref-find-definitions (erlang-id-to-string + (erlang-get-identifier-at-point))) + (error "xref-find-definitions not defined (too old emacs?)")) + (erlang-test-verify-pos expected-file expected-line)) (defun erlang-test-verify-pos (expected-file expected-line) (should (string-equal (file-truename expected-file) @@ -179,6 +188,30 @@ concatenated to form an erlang file to test on.") erlang)) +(ert-deftest erlang-test-parse-id () + (cl-loop for id-string in '("fun/10" + "qualified-function module:fun/10" + "record reko" + "macro _SYMBOL" + "macro MACRO/10" + "module modula" + "macro" + nil) + for id-list in '((nil nil "fun" 10) + (qualified-function "module" "fun" 10) + (record nil "reko" nil) + (macro nil "_SYMBOL" nil) + (macro nil "MACRO" 10) + (module nil "modula" nil) + (nil nil "macro" nil) + nil) + for id-list2 = (erlang-id-to-list id-string) + do (should (equal id-list id-list2)) + for id-string2 = (erlang-id-to-string id-list) + do (should (equal id-string id-string2)) + collect id-list2)) + + (provide 'erlang-test) ;;; erlang-test.el ends here diff --git a/lib/tools/emacs/erlang.el b/lib/tools/emacs/erlang.el index f8edef727..59b20c552 100644 --- a/lib/tools/emacs/erlang.el +++ b/lib/tools/emacs/erlang.el @@ -623,6 +623,24 @@ The regexp must be surrounded with a pair of regexp parentheses.")) This is used to determine matches in complex regexps which contains `erlang-variable-regexp'.")) +(defconst erlang-module-function-regexp + (eval-when-compile + (concat erlang-atom-regexp ":" erlang-atom-regexp)) + "Regexp matching an erlang module:function.") + +(defconst erlang-name-regexp + (concat "\\(" + "\\(?:\\sw\\|\\s_\\)+" + "\\|" + erlang-atom-quoted-regexp + "\\)") + "Matches a name of a function, macro or record") + +(defconst erlang-id-regexp + (concat "\\(?:\\(qualified-function\\|record\\|macro\\|module\\) \\)?" + "\\(?:" erlang-atom-regexp ":\\)?" + erlang-name-regexp "?" + "\\(?:/\\([0-9]+\\)\\)?")) (eval-and-compile (defun erlang-regexp-opt (strings &optional paren) @@ -1445,40 +1463,43 @@ Other commands: (add-to-list 'auto-mode-alist (cons r 'erlang-mode))) (defun erlang-syntax-table-init () - (if (null erlang-mode-syntax-table) - (let ((table (make-syntax-table))) - (modify-syntax-entry ?\n ">" table) - (modify-syntax-entry ?\" "\"" table) - (modify-syntax-entry ?# "." table) - ;; (modify-syntax-entry ?$ "\\" table) ;; Creates problems with indentation afterwards - ;; (modify-syntax-entry ?$ "'" table) ;; Creates syntax highlighting and indentation problems - (modify-syntax-entry ?$ "/" table) ;; Misses the corner case "string that ends with $" - ;; we have to live with that for now..it is the best alternative - ;; that can be worked around with "string hat ends with \$" - (modify-syntax-entry ?% "<" table) - (modify-syntax-entry ?& "." table) - (modify-syntax-entry ?\' "\"" table) - (modify-syntax-entry ?* "." table) - (modify-syntax-entry ?+ "." table) - (modify-syntax-entry ?- "." table) - (modify-syntax-entry ?/ "." table) - (modify-syntax-entry ?: "." table) - (modify-syntax-entry ?< "." table) - (modify-syntax-entry ?= "." table) - (modify-syntax-entry ?> "." table) - (modify-syntax-entry ?\\ "\\" table) - (modify-syntax-entry ?_ "_" table) - (modify-syntax-entry ?| "." table) - (modify-syntax-entry ?^ "'" table) - - ;; Pseudo bit-syntax: Latin1 double angle quotes as parens. - ;;(modify-syntax-entry ?\253 "(?\273" table) - ;;(modify-syntax-entry ?\273 ")?\253" table) - - (setq erlang-mode-syntax-table table))) - + (erlang-ensure-syntax-table-is-initialized) (set-syntax-table erlang-mode-syntax-table)) +(defun erlang-ensure-syntax-table-is-initialized () + (unless erlang-mode-syntax-table + (let ((table (make-syntax-table))) + (modify-syntax-entry ?\n ">" table) + (modify-syntax-entry ?\" "\"" table) + (modify-syntax-entry ?# "." table) + ;; (modify-syntax-entry ?$ "\\" table) ;; Creates problems with indentation afterwards + ;; (modify-syntax-entry ?$ "'" table) ;; Creates syntax highlighting and indentation problems + (modify-syntax-entry ?$ "/" table) ;; Misses the corner case "string that ends with $" + ;; we have to live with that for now..it is the best alternative + ;; that can be worked around with "string that ends with \$" + (modify-syntax-entry ?% "<" table) + (modify-syntax-entry ?& "." table) + (modify-syntax-entry ?\' "\"" table) + (modify-syntax-entry ?* "." table) + (modify-syntax-entry ?+ "." table) + (modify-syntax-entry ?- "." table) + (modify-syntax-entry ?/ "." table) + (modify-syntax-entry ?: "." table) + (modify-syntax-entry ?< "." table) + (modify-syntax-entry ?= "." table) + (modify-syntax-entry ?> "." table) + (modify-syntax-entry ?\\ "\\" table) + (modify-syntax-entry ?_ "_" table) + (modify-syntax-entry ?| "." table) + (modify-syntax-entry ?^ "'" table) + + ;; Pseudo bit-syntax: Latin1 double angle quotes as parens. + ;;(modify-syntax-entry ?\253 "(?\273" table) + ;;(modify-syntax-entry ?\273 ")?\253" table) + + (setq erlang-mode-syntax-table table)))) + + (defun erlang-electric-init () ;; Set up electric character functions to work with @@ -1944,7 +1965,9 @@ menu is left unchanged." The variable `erlang-man-dirs' contains entries describing the location of the manual pages." (interactive) - (if erlang-man-inhibit + (if (or erlang-man-inhibit + (and (boundp 'menu-bar-mode) + (not menu-bar-mode))) () (setq erlang-menu-man-items '(nil @@ -1983,7 +2006,7 @@ The format is described in the documentation of `erlang-man-dirs'." (setq dir (cond ((nth 2 (car dir-list)) ;; Relative to `erlang-root-dir'. (and (stringp erlang-root-dir) - (concat erlang-root-dir (nth 1 (car dir-list))))) + (erlang-man-dir (nth 1 (car dir-list))))) (t ;; Absolute (nth 1 (car dir-list))))) @@ -2001,6 +2024,8 @@ The format is described in the documentation of `erlang-man-dirs'." '(("Man Pages" (("Error! Why?" erlang-man-describe-error))))))) +(defun erlang-man-dir (subdir) + (concat erlang-root-dir "/lib/erlang/" subdir)) ;; Should the menu be to long, let's split it into a number of ;; smaller menus. Warning, this code contains beautiful @@ -2063,7 +2088,7 @@ menus is created." "Find manual page for MODULE, defaults to module of function under point. This function is aware of imported functions." (interactive - (list (let* ((mod (car-safe (erlang-get-function-under-point))) + (list (let* ((mod (erlang-default-module)) (input (read-string (format "Manual entry for module%s: " (if (or (null mod) (string= mod "")) @@ -2072,26 +2097,36 @@ This function is aware of imported functions." (if (string= input "") mod input)))) - (or module (setq module (car (erlang-get-function-under-point)))) - (if (or (null module) (string= module "")) - (error "No Erlang module name given")) + (setq module (or module + (erlang-default-module))) + (when (or (null module) (string= module "")) + (error "No Erlang module name given")) (let ((dir-list erlang-man-dirs) - (pat (concat "/" (regexp-quote module) "\\.\\([124-9]\\|3\\(erl\\)?\\)\\(\\.gz\\)?$")) + (pat (concat "/" (regexp-quote module) + "\\.\\([124-9]\\|3\\(erl\\)?\\)\\(\\.gz\\)?$")) (file nil) file-list) (while (and dir-list (null file)) - (setq file-list (erlang-man-get-files - (if (nth 2 (car dir-list)) - (concat erlang-root-dir (nth 1 (car dir-list))) - (nth 1 (car dir-list))))) - (while (and file-list (null file)) - (if (string-match pat (car file-list)) - (setq file (car file-list))) - (setq file-list (cdr file-list))) - (setq dir-list (cdr dir-list))) + (let ((dir (if (nth 2 (car dir-list)) + (erlang-man-dir (nth 1 (car dir-list))) + (nth 1 (car dir-list))))) + (when (file-directory-p dir) + (setq file-list (erlang-man-get-files dir)) + (while (and file-list (null file)) + (if (string-match pat (car file-list)) + (setq file (car file-list))) + (setq file-list (cdr file-list)))) + (setq dir-list (cdr dir-list)))) (if file (funcall erlang-man-display-function file) - (error "No manual page for module %s found" module)))) + ;; Did not found the manual file. Fallback to manual-entry. + (manual-entry module)))) + +(defun erlang-default-module () + (let ((id (erlang-get-identifier-at-point))) + (if (eq (erlang-id-kind id) 'qualified-function) + (erlang-id-module id) + (erlang-id-name id)))) ;; Warning, the function `erlang-man-function' is a hack! @@ -2111,37 +2146,28 @@ The entry for `function' is displayed. This function is aware of imported functions." (interactive - (list (let* ((mod-func (erlang-get-function-under-point)) - (mod (car-safe mod-func)) - (func (nth 1 mod-func)) + (list (let* ((default (erlang-default-function-or-module)) (input (read-string (format "Manual entry for `module:func' or `module'%s: " - (if (or (null mod) (string= mod "")) - "" - (format " (default %s:%s)" mod func)))))) + (if default + (format " (default %s)" default) + ""))))) (if (string= input "") - (if (and mod func) - (concat mod ":" func) - mod) + default input)))) - ;; Emacs 18 doesn't provide `man'... - (condition-case nil - (require 'man) - (error nil)) + (require 'man) + (setq name (or name + (erlang-default-function-or-module))) (let ((modname nil) (funcname nil)) - (cond ((null name) - (let ((mod-func (erlang-get-function-under-point))) - (setq modname (car-safe mod-func)) - (setq funcname (nth 1 mod-func)))) - ((string-match ":" name) + (cond ((string-match ":" name) (setq modname (substring name 0 (match-beginning 0))) (setq funcname (substring name (match-end 0) nil))) ((stringp name) (setq modname name))) - (if (or (null modname) (string= modname "")) - (error "No Erlang module name given")) + (when (or (null modname) (string= modname "")) + (error "No Erlang module name given")) (cond ((fboundp 'Man-notify-when-ready) ;; Emacs 19: The man command could possibly start an ;; asynchronous process, i.e. we must hook ourselves into @@ -2151,16 +2177,20 @@ This function is aware of imported functions." () (erlang-man-patch-notify) (setq erlang-man-function-name funcname)) - (condition-case nil + (condition-case err (erlang-man-module modname) - (error (setq erlang-man-function-name nil)))) + (error (setq erlang-man-function-name nil) + (signal (car err) (cdr err))))) (t (erlang-man-module modname) - (if funcname - (erlang-man-find-function - (or (get-buffer "*Manual Entry*") ; Emacs 18 - (current-buffer)) ; XEmacs - funcname)))))) + (when funcname + (erlang-man-find-function (current-buffer) funcname)))))) + +(defun erlang-default-function-or-module () + (let ((id (erlang-get-identifier-at-point))) + (if (eq (erlang-id-kind id) 'qualified-function) + (format "%s:%s" (erlang-id-module id) (erlang-id-name id)) + (erlang-id-name id)))) ;; Should the defadvice be at the top level, the package `advice' would @@ -2205,36 +2235,22 @@ command is executed asynchronously." (set-window-point win (point))) (message "Could not find function `%s'" func))))))) +(defvar erlang-man-file-regexp + "\\(.*\\)/man[^/]*/\\([^.]+\\)\\.\\([124-9]\\|3\\(erl\\)?\\)\\(\\.gz\\)?$") (defun erlang-man-display (file) "Display FILE as a `man' file. This is the default manual page display function. The variables `erlang-man-display-function' contains the function to be used." - ;; Emacs 18 doesn't `provide' man. - (condition-case nil - (require 'man) - (error nil)) + (require 'man) (if file (let ((process-environment (copy-sequence process-environment))) - (if (string-match "\\(.*\\)/man[^/]*/\\([^.]+\\)\\.\\([124-9]\\|3\\(erl\\)?\\)\\(\\.gz\\)?$" file) + (if (string-match erlang-man-file-regexp file) (let ((dir (substring file (match-beginning 1) (match-end 1))) (page (substring file (match-beginning 2) (match-end 2)))) - (if (fboundp 'setenv) - (setenv "MANPATH" dir) - ;; Emacs 18 - (setq process-environment (cons (concat "MANPATH=" dir) - process-environment))) - (cond ((not (and (not erlang-xemacs-p) - (= emacs-major-version 19) - (< emacs-minor-version 29))) - (manual-entry page)) - (t - ;; Emacs 19.28 and earlier versions of 19: - ;; The manual-entry command unconditionally prompts - ;; the user :-( - (funcall (symbol-function 'Man-getpage-in-background) - page)))) + (setenv "MANPATH" dir) + (manual-entry page)) (error "Can't find man page for %s\n" file))))) @@ -2939,7 +2955,7 @@ Return nil if inside string, t if in a comment." ((eq (car stack-top) '->) ;; If in fun definition use standard indent level not double ;;(if (not (eq (car (car (cdr stack))) 'fun)) - ;; Removed it made multi clause fun's look to bad + ;; Removed it made multi clause fun's look too bad (setq off (+ erlang-indent-level (if (not erlang-icr-indent) erlang-indent-level erlang-icr-indent))))) @@ -3679,34 +3695,50 @@ Normally used in conjunction with `erlang-beginning-of-clause', e.g.: (defun erlang-get-function-arity () "Return the number of arguments of function at point, or nil." - (and (looking-at (eval-when-compile - (concat "^" erlang-atom-regexp "\\s *("))) - (save-excursion - (goto-char (match-end 0)) - (condition-case nil - (let ((res 0) - (cont t)) - (while cont - (cond ((eobp) - (setq res nil) - (setq cont nil)) - ((looking-at "\\s *)") - (setq cont nil)) - ((looking-at "\\s *\\($\\|%\\)") - (forward-line 1)) - ((looking-at "\\s *<<[^>]*?>>") - (when (zerop res) - (setq res (+ 1 res))) - (goto-char (match-end 0))) - ((looking-at "\\s *,") - (setq res (+ 1 res)) - (goto-char (match-end 0))) - (t - (when (zerop res) - (setq res (+ 1 res))) - (forward-sexp 1)))) - res) - (error nil))))) + (erlang-get-arity-after-regexp (concat "^" erlang-atom-regexp "\\s *("))) + +(defun erlang-get-argument-list-arity () + "Return the number of arguments in argument list at point, or nil. +The point should be before the opening parenthesis of the +argument list before calling this function." + (erlang-get-arity-after-regexp "\\s *(")) + +(defun erlang-get-arity-after-regexp (regexp) + "Return the number of arguments in argument list after REGEXP, or nil." + (when (looking-at regexp) + (save-excursion + (goto-char (match-end 0)) + (erlang-get-arity)))) + +(defun erlang-get-arity () + "Return the number of arguments in argument list at point, or nil. +The point should be after the opening parenthesis of the argument +list before calling this function." + (condition-case nil + (let ((res 0) + (cont t)) + (while cont + (cond ((eobp) + (setq res nil) + (setq cont nil)) + ((looking-at "\\s *)") + (setq cont nil)) + ((looking-at "\\s *\\($\\|%\\)") + (forward-line 1)) + ((looking-at "\\s *<<[^>]*?>>") + (when (zerop res) + (setq res (+ 1 res))) + (goto-char (match-end 0))) + ((looking-at "\\s *,") + (setq res (+ 1 res)) + (goto-char (match-end 0))) + (t + (when (zerop res) + (setq res (+ 1 res))) + (forward-sexp 1)))) + res) + (error nil))) + (defun erlang-get-function-name-and-arity () "Return the name and arity of the function at point, or nil. @@ -3729,6 +3761,8 @@ The return value is a string of the form \"foo/1\"." (error nil))))) +;; Keeping erlang-get-function-under-point for backward compatibility. +;; It is used by erldoc.el and maybe other code out there. (defun erlang-get-function-under-point () "Return the module and function under the point, or nil. @@ -3738,44 +3772,141 @@ list of imported functions is searched. The following could be returned: (\"module\" \"function\") -- Both module and function name found. (nil \"function\") -- No module name was found. - nil -- No function name found + nil -- No function name found. + +See also `erlang-get-identifier-at-point'." + (let* ((id (erlang-get-identifier-at-point)) + (kind (erlang-id-kind id)) + (module (erlang-id-module id)) + (name (erlang-id-name id))) + (cond ((eq kind 'qualified-function) + (list module name)) + (name + (list nil name))))) + +(defun erlang-get-identifier-at-point () + "Return the erlang identifier at point, or nil. + +Should no explicit module name be present at the point, the +list of imported functions is searched. + +When an identifier is found return a list with 4 elements: + +1. Kind - One of the symbols qualified-function, record, macro, +module or nil. -In the future the list may contain more elements." +2. Module - Module name string or nil. In case of a +qualified-function a search fails if no entries with correct +module are found. For other kinds the module is just a +preference. If no matching entries are found the search will be +retried without regard to module. + +3. Name - String name of function, module, record or macro. + +4. Arity - Integer in case of functions and macros if the number +of arguments could be found, otherwise nil." (save-excursion - (let ((md (match-data)) - (res nil)) + (save-match-data (if (eq (char-syntax (following-char)) ? ) (skip-chars-backward " \t")) - (skip-chars-backward "a-zA-Z0-9_:'") - (cond ((looking-at (eval-when-compile - (concat erlang-atom-regexp ":" erlang-atom-regexp))) - (setq res (list - (erlang-remove-quotes - (erlang-buffer-substring - (match-beginning 1) (match-end 1))) - (erlang-remove-quotes - (erlang-buffer-substring - (match-beginning (1+ erlang-atom-regexp-matches)) - (match-end (1+ erlang-atom-regexp-matches))))))) - ((looking-at erlang-atom-regexp) - (let ((fk (erlang-remove-quotes - (erlang-buffer-substring - (match-beginning 0) (match-end 0)))) - (mod nil) - (imports (erlang-get-import))) - (while (and imports (null mod)) - (if (assoc fk (cdr (car imports))) - (setq mod (car (car imports))) - (setq imports (cdr imports)))) - (cond ((eq (preceding-char) ?#) - (setq fk (concat "-record(" fk))) - ((eq (preceding-char) ??) - (setq fk (concat "-define(" fk))) - ((and (null mod) (not (member fk erlang-int-bifs))) - (setq mod (erlang-get-module)))) - (setq res (list mod fk))))) - (store-match-data md) - res))) + (skip-chars-backward "[:word:]_:'") + (cond ((looking-at erlang-module-function-regexp) + (erlang-get-qualified-function-id-at-point)) + ((looking-at (concat erlang-atom-regexp ":")) + (erlang-get-module-id-at-point)) + ((looking-at erlang-name-regexp) + (erlang-get-some-other-id-at-point)))))) + +(defun erlang-get-qualified-function-id-at-point () + (let ((kind 'qualified-function) + (module (erlang-remove-quotes + (erlang-buffer-substring + (match-beginning 1) (match-end 1)))) + (name (erlang-remove-quotes + (erlang-buffer-substring + (match-beginning (1+ erlang-atom-regexp-matches)) + (match-end (1+ erlang-atom-regexp-matches))))) + (arity (progn + (goto-char (match-end 0)) + (erlang-get-argument-list-arity)))) + (list kind module name arity))) + +(defun erlang-get-module-id-at-point () + (let ((kind 'module) + (module nil) + (name (erlang-remove-quotes + (erlang-buffer-substring (match-beginning 1) + (match-end 1)))) + (arity nil)) + (list kind module name arity))) + +(defun erlang-get-some-other-id-at-point () + (let ((name (erlang-remove-quotes + (erlang-buffer-substring + (match-beginning 0) (match-end 0)))) + (imports (erlang-get-import)) + kind module arity) + (while (and imports (null module)) + (if (assoc name (cdr (car imports))) + (setq module (car (car imports))) + (setq imports (cdr imports)))) + (cond ((eq (preceding-char) ?#) + (setq kind 'record)) + ((eq (preceding-char) ??) + (setq kind 'macro)) + ((and (null module) (not (member name erlang-int-bifs))) + (setq module (erlang-get-module)))) + (setq arity (progn + (goto-char (match-end 0)) + (erlang-get-argument-list-arity))) + (list kind module name arity))) + +(defmacro erlang-with-id (slots id-string &rest body) + (declare (indent 2)) + (let ((id-var (make-symbol "id"))) + `(let* ((,id-var (erlang-id-to-list ,id-string)) + ,@(mapcar (lambda (slot) + (list slot + (list (intern (format "erlang-id-%s" slot)) + id-var))) + slots)) + ,@body))) + +(defun erlang-id-to-string (id) + (when id + (erlang-with-id (kind module name arity) id + (format "%s%s%s%s" + (if kind (format "%s " kind) "") + (if module (format "%s:" module) "") + name + (if arity (format "/%s" arity) ""))))) + +(defun erlang-id-to-list (id) + (if (listp id) + id + (save-match-data + (erlang-ensure-syntax-table-is-initialized) + (with-syntax-table erlang-mode-syntax-table + (let (case-fold-search) + (when (string-match erlang-id-regexp id) + (list (when (match-string 1 id) + (intern (match-string 1 id))) + (match-string 2 id) + (match-string 3 id) + (when (match-string 4 id) + (string-to-number (match-string 4 id)))))))))) + +(defun erlang-id-kind (id) + (car (erlang-id-to-list id))) + +(defun erlang-id-module (id) + (nth 1 (erlang-id-to-list id))) + +(defun erlang-id-name (id) + (nth 2 (erlang-id-to-list id))) + +(defun erlang-id-arity (id) + (nth 3 (erlang-id-to-list id))) ;; TODO: Escape single quotes inside the string without @@ -4293,8 +4424,8 @@ This function is designed to be a member of a criteria list." (looking-at "end[^_a-zA-Z0-9]"))) -;; Erlang tags support which is aware of erlang modules. -;; +;;; Erlang tags support which is aware of erlang modules. + ;; Not yet implemented under XEmacs. (Hint: The Emacs 19 etags ;; package works under XEmacs.) @@ -4392,20 +4523,6 @@ works under XEmacs.)" (erlang-menu-substitute erlang-menu-base-items erlang-tags-function-alist) (erlang-menu-init)) - -(defun erlang-find-tag-default () - "Return the default tag. -Search `-import' list of imported functions. -Single quotes are been stripped away." - (let ((mod-func (erlang-get-function-under-point))) - (cond ((null mod-func) - nil) - ((null (car mod-func)) - (nth 1 mod-func)) - (t - (concat (car mod-func) ":" (nth 1 mod-func)))))) - - ;; Return `t' since it is used inside `tags-loop-form'. ;;;###autoload (defun erlang-find-tag (modtagname &optional next-p regexp-p) @@ -4592,7 +4709,7 @@ Tags can be given on the forms `tag', `module:', `module:tag'." (list nil (if (< (prefix-numeric-value current-prefix-arg) 0) '- t)) - (let* ((default (erlang-find-tag-default)) + (let* ((default (erlang-default-function-or-module)) (prompt (if default (format "%s(default %s) " prompt default) prompt)) @@ -4944,6 +5061,14 @@ about Erlang modules." ;; It adds awareness of the module:tag syntax in a similar way that is ;; done above for the old etags commands. +(defvar erlang-current-arity nil + "The arity of the function currently being searched. + +There is no information about arity in the TAGS file. +Consecutive functions with same name but different arity will +only get one entry in the TAGS file. Matching TAGS entries are +therefore selected without regarding arity. The arity is +considered first when it is time to jump to the definition.") (defun erlang-etags--xref-backend () 'erlang-etags) @@ -4953,13 +5078,14 @@ about Erlang modules." (and (erlang-soft-require 'xref) (erlang-soft-require 'cl-generic) + (erlang-soft-require 'eieio) ;; The purpose of using eval here is to avoid compilation - ;; warnings in emacsen without cl-defmethod. + ;; warnings in emacsen without cl-defmethod etc. (eval '(progn (cl-defmethod xref-backend-identifier-at-point ((_backend (eql erlang-etags))) - (erlang-find-tag-default)) + (erlang-id-to-string (erlang-get-identifier-at-point))) (cl-defmethod xref-backend-definitions ((_backend (eql erlang-etags)) identifier) @@ -4972,42 +5098,99 @@ about Erlang modules." (cl-defmethod xref-backend-identifier-completion-table ((_backend (eql erlang-etags))) (let ((erlang-replace-etags-tags-completion-table t)) - (tags-completion-table)))))) - - + (tags-completion-table))) + + (defclass erlang-xref-location (xref-etags-location) ()) + + (defun erlang-convert-xrefs (xrefs) + (mapcar (lambda (xref) + (oset xref location (erlang-make-location + (oref xref location))) + xref) + xrefs)) + + (defun erlang-make-location (etags-location) + (with-slots (tag-info file) etags-location + (make-instance 'erlang-xref-location :tag-info tag-info + :file file))) + + (cl-defmethod xref-location-marker ((locus erlang-xref-location)) + (with-slots (tag-info file) locus + (with-current-buffer (find-file-noselect file) + (save-excursion + (or (erlang-goto-tag-location-by-arity tag-info) + (etags-goto-tag-location tag-info)) + ;; Reset erlang-current-arity. We want to jump to + ;; correct arity in the first attempt. That is now + ;; done. Possible remaining jumps will be from + ;; entries in the *xref* buffer and then we want to + ;; ignore the arity. (Alternatively we could remove + ;; all but one xref entry per file when we know the + ;; arity). + (setq erlang-current-arity nil) + (point-marker))))) + + (defun erlang-xref-context (xref) + (with-slots (tag-info) (xref-item-location xref) + (car tag-info)))))) + + +(defun erlang-goto-tag-location-by-arity (tag-info) + (when erlang-current-arity + (let* ((tag-text (car tag-info)) + (tag-pos (cdr (cdr tag-info))) + (tag-line (car (cdr tag-info))) + (regexp (erlang-tag-info-regexp tag-text)) + (startpos (or tag-pos + (when tag-line + (goto-char (point-min)) + (forward-line (1- tag-line)) + (point)) + (point-min)))) + (setq startpos (max (- startpos 2000) + (point-min))) + (goto-char startpos) + (let ((pos (or (erlang-search-by-arity regexp) + (unless (eq startpos (point-min)) + (goto-char (point-min)) + (erlang-search-by-arity regexp))))) + (when pos + (goto-char pos) + t))))) + +(defun erlang-tag-info-regexp (tag-text) + (concat "^" + (regexp-quote tag-text) + ;; Erlang function entries in TAGS includes the opening + ;; parenthesis for the argument list. Erlang macro entries + ;; do not. Add it here in order to end up in correct + ;; position for erlang-get-arity. + (if (string-prefix-p "-define" tag-text) + "\\s-*(" + ""))) + +(defun erlang-search-by-arity (regexp) + (let (pos) + (while (and (null pos) + (re-search-forward regexp nil t)) + (when (eq erlang-current-arity (save-excursion (erlang-get-arity))) + (setq pos (point-at-bol)))) + pos)) (defun erlang-xref-find-definitions (identifier &optional is-regexp) - (let ((id-list (split-string identifier ":"))) - (cond - ;; Handle "tag" - ((null (cdr id-list)) - (erlang-xref-find-definitions-tag identifier is-regexp)) - ;; Handle "module:" - ((string-equal (cadr id-list) "") - (erlang-xref-find-definitions-module (car id-list))) - ;; Handle "module:tag" - (t - (erlang-xref-find-definitions-module-tag (car id-list) - (cadr id-list) - is-regexp))))) - -(defun erlang-xref-find-definitions-tag (tag is-regexp) - "Find all definitions of TAG and reorder them so that -definitions in the currently visited file comes first." - (when (fboundp 'etags--xref-find-definitions) - (let* ((current-file (and (buffer-file-name) - (file-truename (buffer-file-name)))) - (xrefs (etags--xref-find-definitions tag is-regexp)) - local-xrefs non-local-xrefs) - (while xrefs - (if (string-equal (erlang-xref-truename-file (car xrefs)) - current-file) - (push (car xrefs) local-xrefs) - (push (car xrefs) non-local-xrefs)) - (setq xrefs (cdr xrefs))) - (append (reverse local-xrefs) - (reverse non-local-xrefs))))) + (erlang-with-id (kind module name arity) identifier + (setq erlang-current-arity arity) + (cond ((eq kind 'module) + (erlang-xref-find-definitions-module name)) + (module + (erlang-xref-find-definitions-module-tag module + name + (eq kind + 'qualified-function) + is-regexp)) + (t + (erlang-xref-find-definitions-tag kind name is-regexp))))) (defun erlang-xref-find-definitions-module (module) (and (fboundp 'xref-make) @@ -5031,17 +5214,58 @@ definitions in the currently visited file comes first." (setq files (cdr files)))))) (nreverse xrefs)))) -(defun erlang-xref-find-definitions-module-tag (module tag is-regexp) - "Find all definitions of TAG and filter away definitions -outside of MODULE." - (when (fboundp 'etags--xref-find-definitions) - (let ((xrefs (etags--xref-find-definitions tag is-regexp)) - xrefs-in-module) - (while xrefs - (when (string-equal module (erlang-xref-module (car xrefs))) - (push (car xrefs) xrefs-in-module)) - (setq xrefs (cdr xrefs))) - xrefs-in-module))) + +(defun erlang-xref-find-definitions-module-tag (module + tag + is-qualified + is-regexp) + "Find definitions of TAG and filter away definitions outside of +MODULE. If IS-QUALIFIED is nil and no definitions was found inside +the MODULE then return any definitions found outside. If +IS-REGEXP is non-nil then TAG is a regexp." + (and (fboundp 'etags--xref-find-definitions) + (fboundp 'erlang-convert-xrefs) + (let ((xrefs (erlang-convert-xrefs + (etags--xref-find-definitions tag is-regexp))) + xrefs-in-module) + (dolist (xref xrefs) + (when (string-equal module (erlang-xref-module xref)) + (push xref xrefs-in-module))) + (cond (is-qualified xrefs-in-module) + (xrefs-in-module xrefs-in-module) + (t xrefs))))) + +(defun erlang-xref-find-definitions-tag (kind tag is-regexp) + "Find all definitions of TAG and reorder them so that +definitions in the currently visited file comes first." + (and (fboundp 'etags--xref-find-definitions) + (fboundp 'erlang-convert-xrefs) + (let* ((current-file (and (buffer-file-name) + (file-truename (buffer-file-name)))) + (regexp (erlang-etags-regexp kind tag is-regexp)) + (xrefs (erlang-convert-xrefs + (etags--xref-find-definitions regexp t))) + local-xrefs non-local-xrefs) + (while xrefs + (let ((xref (car xrefs))) + (if (string-equal (erlang-xref-truename-file xref) + current-file) + (push xref local-xrefs) + (push xref non-local-xrefs)) + (setq xrefs (cdr xrefs)))) + (append (reverse local-xrefs) + (reverse non-local-xrefs))))) + +(defun erlang-etags-regexp (kind tag is-regexp) + (let ((tag-regexp (if is-regexp + tag + (regexp-quote tag)))) + (cond ((eq kind 'record) + (concat "-record\\s-*(\\s-*" tag-regexp)) + ((eq kind 'macro) + (concat "-define\\s-*(\\s-*" tag-regexp)) + (t tag-regexp)))) + (defun erlang-xref-module (xref) (erlang-get-module-from-file-name (erlang-xref-file xref))) -- 2.11.1
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