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clojure-mode.el
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;;; clojure-mode.el --- Major mode for Clojure code -*- lexical-binding: t; -*-
;; Copyright © 2007-2020 Jeffrey Chu, Lennart Staflin, Phil Hagelberg
;; Copyright © 2013-2020 Bozhidar Batsov, Artur Malabarba
;;
;; Authors: Jeffrey Chu <jochu0@gmail.com>
;; Lennart Staflin <lenst@lysator.liu.se>
;; Phil Hagelberg <technomancy@gmail.com>
;; Bozhidar Batsov <bozhidar@batsov.com>
;; Artur Malabarba <bruce.connor.am@gmail.com>
;; Maintainer: Bozhidar Batsov <bozhidar@batsov.com>
;; URL: http://github.com/clojure-emacs/clojure-mode
;; Keywords: languages clojure clojurescript lisp
;; Version: 5.13.0-snapshot
;; Package-Requires: ((emacs "25.1"))
;; This file is not part of GNU Emacs.
;;; Commentary:
;; Provides font-lock, indentation, navigation and basic refactoring for the
;; Clojure programming language (http://clojure.org).
;; Using clojure-mode with paredit or smartparens is highly recommended.
;; Here are some example configurations:
;; ;; require or autoload paredit-mode
;; (add-hook 'clojure-mode-hook #'paredit-mode)
;; ;; require or autoload smartparens
;; (add-hook 'clojure-mode-hook #'smartparens-strict-mode)
;; See inf-clojure (http://github.com/clojure-emacs/inf-clojure) for
;; basic interaction with Clojure subprocesses.
;; See CIDER (http://github.com/clojure-emacs/cider) for
;; better interaction with subprocesses via nREPL.
;;; License:
;; This program is free software; you can redistribute it and/or
;; modify it under the terms of the GNU General Public License
;; as published by the Free Software Foundation; either version 3
;; of the License, or (at your option) any later version.
;;
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Code:
(eval-when-compile
(defvar calculate-lisp-indent-last-sexp)
(defvar font-lock-beg)
(defvar font-lock-end)
(defvar paredit-space-for-delimiter-predicates)
(defvar paredit-version)
(defvar paredit-mode))
(require 'cl-lib)
(require 'imenu)
(require 'newcomment)
(require 'align)
(require 'subr-x)
(require 'lisp-mnt)
(declare-function lisp-fill-paragraph "lisp-mode" (&optional justify))
(defgroup clojure nil
"Major mode for editing Clojure code."
:prefix "clojure-"
:group 'languages
:link '(url-link :tag "GitHub" "https://github.com/clojure-emacs/clojure-mode")
:link '(emacs-commentary-link :tag "Commentary" "clojure-mode"))
(defconst clojure-mode-version
(eval-when-compile
(lm-version (or load-file-name buffer-file-name)))
"The current version of `clojure-mode'.")
(defface clojure-keyword-face
'((t (:inherit font-lock-constant-face)))
"Face used to font-lock Clojure keywords (:something)."
:package-version '(clojure-mode . "3.0.0"))
(defface clojure-character-face
'((t (:inherit font-lock-string-face)))
"Face used to font-lock Clojure character literals."
:package-version '(clojure-mode . "3.0.0"))
(defcustom clojure-indent-style 'always-align
"Indentation style to use for function forms and macro forms.
There are two cases of interest configured by this variable.
- Case (A) is when at least one function argument is on the same
line as the function name.
- Case (B) is the opposite (no arguments are on the same line as
the function name). Note that the body of macros is not
affected by this variable, it is always indented by
`lisp-body-indent' (default 2) spaces.
Note that this variable configures the indentation of function
forms (and function-like macros), it does not affect macros that
already use special indentation rules.
The possible values for this variable are keywords indicating how
to indent function forms.
`always-align' - Follow the same rules as `lisp-mode'. All
args are vertically aligned with the first arg in case (A),
and vertically aligned with the function name in case (B).
For instance:
(reduce merge
some-coll)
(reduce
merge
some-coll)
`always-indent' - All args are indented like a macro body.
(reduce merge
some-coll)
(reduce
merge
some-coll)
`align-arguments' - Case (A) is indented like `lisp', and
case (B) is indented like a macro body.
(reduce merge
some-coll)
(reduce
merge
some-coll)"
:safe #'symbolp
:type '(choice (const :tag "Same as `lisp-mode'" 'always-align)
(const :tag "Indent like a macro body" 'always-indent)
(const :tag "Indent like a macro body unless first arg is on the same line"
'align-arguments))
:package-version '(clojure-mode . "5.2.0"))
(defcustom clojure-use-backtracking-indent t
"When non-nil, enable context sensitive indentation."
:type 'boolean
:safe 'booleanp)
(defcustom clojure-max-backtracking 3
"Maximum amount to backtrack up a list to check for context."
:type 'integer
:safe 'integerp)
(defcustom clojure-docstring-fill-column fill-column
"Value of `fill-column' to use when filling a docstring."
:type 'integer
:safe 'integerp)
(defcustom clojure-docstring-fill-prefix-width 2
"Width of `fill-prefix' when filling a docstring.
The default value conforms with the de facto convention for
Clojure docstrings, aligning the second line with the opening
double quotes on the third column."
:type 'integer
:safe 'integerp)
(defcustom clojure-omit-space-between-tag-and-delimiters '(?\[ ?\{ ?\()
"Allowed opening delimiter characters after a reader literal tag.
For example, \[ is allowed in :db/id[:db.part/user]."
:type '(set (const :tag "[" ?\[)
(const :tag "{" ?\{)
(const :tag "(" ?\()
(const :tag "\"" ?\"))
:safe (lambda (value)
(and (listp value)
(cl-every 'characterp value))))
(defcustom clojure-build-tool-files
'("project.clj" ; Leiningen
"build.boot" ; Boot
"build.gradle" ; Gradle
"build.gradle.kts" ; Gradle
"deps.edn" ; Clojure CLI (a.k.a. tools.deps)
"shadow-cljs.edn" ; shadow-cljs
)
"A list of files, which identify a Clojure project's root.
Out-of-the box `clojure-mode' understands lein, boot, gradle,
shadow-cljs and tools.deps."
:type '(repeat string)
:package-version '(clojure-mode . "5.0.0")
:safe (lambda (value)
(and (listp value)
(cl-every 'stringp value))))
(defcustom clojure-project-root-function #'clojure-project-root-path
"Function to locate clojure project root directory."
:type 'function
:risky t
:package-version '(clojure-mode . "5.7.0"))
(defcustom clojure-refactor-map-prefix (kbd "C-c C-r")
"Clojure refactor keymap prefix."
:type 'string
:package-version '(clojure-mode . "5.6.0"))
(defvar clojure-refactor-map
(let ((map (make-sparse-keymap)))
(define-key map (kbd "C-t") #'clojure-thread)
(define-key map (kbd "t") #'clojure-thread)
(define-key map (kbd "C-u") #'clojure-unwind)
(define-key map (kbd "u") #'clojure-unwind)
(define-key map (kbd "C-f") #'clojure-thread-first-all)
(define-key map (kbd "f") #'clojure-thread-first-all)
(define-key map (kbd "C-l") #'clojure-thread-last-all)
(define-key map (kbd "l") #'clojure-thread-last-all)
(define-key map (kbd "C-p") #'clojure-cycle-privacy)
(define-key map (kbd "p") #'clojure-cycle-privacy)
(define-key map (kbd "C-(") #'clojure-convert-collection-to-list)
(define-key map (kbd "(") #'clojure-convert-collection-to-list)
(define-key map (kbd "C-'") #'clojure-convert-collection-to-quoted-list)
(define-key map (kbd "'") #'clojure-convert-collection-to-quoted-list)
(define-key map (kbd "C-{") #'clojure-convert-collection-to-map)
(define-key map (kbd "{") #'clojure-convert-collection-to-map)
(define-key map (kbd "C-[") #'clojure-convert-collection-to-vector)
(define-key map (kbd "[") #'clojure-convert-collection-to-vector)
(define-key map (kbd "C-#") #'clojure-convert-collection-to-set)
(define-key map (kbd "#") #'clojure-convert-collection-to-set)
(define-key map (kbd "C-i") #'clojure-cycle-if)
(define-key map (kbd "i") #'clojure-cycle-if)
(define-key map (kbd "C-w") #'clojure-cycle-when)
(define-key map (kbd "w") #'clojure-cycle-when)
(define-key map (kbd "C-o") #'clojure-cycle-not)
(define-key map (kbd "o") #'clojure-cycle-not)
(define-key map (kbd "n i") #'clojure-insert-ns-form)
(define-key map (kbd "n h") #'clojure-insert-ns-form-at-point)
(define-key map (kbd "n u") #'clojure-update-ns)
(define-key map (kbd "n s") #'clojure-sort-ns)
(define-key map (kbd "n r") #'clojure-rename-ns-alias)
(define-key map (kbd "s i") #'clojure-introduce-let)
(define-key map (kbd "s m") #'clojure-move-to-let)
(define-key map (kbd "s f") #'clojure-let-forward-slurp-sexp)
(define-key map (kbd "s b") #'clojure-let-backward-slurp-sexp)
(define-key map (kbd "C-a") #'clojure-add-arity)
(define-key map (kbd "a") #'clojure-add-arity)
map)
"Keymap for Clojure refactoring commands.")
(fset 'clojure-refactor-map clojure-refactor-map)
(defvar clojure-mode-map
(let ((map (make-sparse-keymap)))
(set-keymap-parent map prog-mode-map)
(define-key map (kbd "C-:") #'clojure-toggle-keyword-string)
(define-key map (kbd "C-c SPC") #'clojure-align)
(define-key map clojure-refactor-map-prefix 'clojure-refactor-map)
(easy-menu-define clojure-mode-menu map "Clojure Mode Menu"
'("Clojure"
["Toggle between string & keyword" clojure-toggle-keyword-string]
["Align expression" clojure-align]
["Cycle privacy" clojure-cycle-privacy]
["Cycle if, if-not" clojure-cycle-if]
["Cycle when, when-not" clojure-cycle-when]
["Cycle not" clojure-cycle-not]
["Add function arity" clojure-add-arity]
("ns forms"
["Insert ns form at the top" clojure-insert-ns-form]
["Insert ns form here" clojure-insert-ns-form-at-point]
["Update ns form" clojure-update-ns]
["Sort ns form" clojure-sort-ns]
["Rename ns alias" clojure-rename-ns-alias])
("Convert collection"
["Convert to list" clojure-convert-collection-to-list]
["Convert to quoted list" clojure-convert-collection-to-quoted-list]
["Convert to map" clojure-convert-collection-to-map]
["Convert to vector" clojure-convert-collection-to-vector]
["Convert to set" clojure-convert-collection-to-set])
("Refactor -> and ->>"
["Thread once more" clojure-thread]
["Fully thread a form with ->" clojure-thread-first-all]
["Fully thread a form with ->>" clojure-thread-last-all]
"--"
["Unwind once" clojure-unwind]
["Fully unwind a threading macro" clojure-unwind-all])
("Let expression"
["Introduce let" clojure-introduce-let]
["Move to let" clojure-move-to-let]
["Forward slurp form into let" clojure-let-forward-slurp-sexp]
["Backward slurp form into let" clojure-let-backward-slurp-sexp])
("Documentation"
["View a Clojure guide" clojure-view-guide]
["View a Clojure reference section" clojure-view-reference-section]
["View the Clojure cheatsheet" clojure-view-cheatsheet]
["View the Clojure Grimoire" clojure-view-grimoire]
["View the Clojure style guide" clojure-view-style-guide])
"--"
["Report a clojure-mode bug" clojure-mode-report-bug]
["Clojure-mode version" clojure-mode-display-version]))
map)
"Keymap for Clojure mode.")
(defvar clojure-mode-syntax-table
(let ((table (make-syntax-table)))
;; Initialize ASCII charset as symbol syntax
(modify-syntax-entry '(0 . 127) "_" table)
;; Word syntax
(modify-syntax-entry '(?0 . ?9) "w" table)
(modify-syntax-entry '(?a . ?z) "w" table)
(modify-syntax-entry '(?A . ?Z) "w" table)
;; Whitespace
(modify-syntax-entry ?\s " " table)
(modify-syntax-entry ?\xa0 " " table) ; non-breaking space
(modify-syntax-entry ?\t " " table)
(modify-syntax-entry ?\f " " table)
;; Setting commas as whitespace makes functions like `delete-trailing-whitespace' behave unexpectedly (#561)
(modify-syntax-entry ?, "." table)
;; Delimiters
(modify-syntax-entry ?\( "()" table)
(modify-syntax-entry ?\) ")(" table)
(modify-syntax-entry ?\[ "(]" table)
(modify-syntax-entry ?\] ")[" table)
(modify-syntax-entry ?\{ "(}" table)
(modify-syntax-entry ?\} "){" table)
;; Prefix chars
(modify-syntax-entry ?` "'" table)
(modify-syntax-entry ?~ "'" table)
(modify-syntax-entry ?^ "'" table)
(modify-syntax-entry ?@ "'" table)
(modify-syntax-entry ?? "_ p" table) ; ? is a prefix outside symbols
(modify-syntax-entry ?# "_ p" table) ; # is allowed inside keywords (#399)
(modify-syntax-entry ?' "_ p" table) ; ' is allowed anywhere but the start of symbols
;; Others
(modify-syntax-entry ?\; "<" table) ; comment start
(modify-syntax-entry ?\n ">" table) ; comment end
(modify-syntax-entry ?\" "\"" table) ; string
(modify-syntax-entry ?\\ "\\" table) ; escape
table)
"Syntax table for Clojure mode.")
(defconst clojure--prettify-symbols-alist
'(("fn" . ?λ)))
(defvar-local clojure-expected-ns-function nil
"The function used to determine the expected namespace of a file.
`clojure-mode' ships a basic function named `clojure-expected-ns'
that does basic heuristics to figure this out.
CIDER provides a more complex version which does classpath analysis.")
(defun clojure-mode-display-version ()
"Display the current `clojure-mode-version' in the minibuffer."
(interactive)
(message "clojure-mode (version %s)" clojure-mode-version))
(defconst clojure-mode-report-bug-url "https://github.com/clojure-emacs/clojure-mode/issues/new"
"The URL to report a `clojure-mode' issue.")
(defun clojure-mode-report-bug ()
"Report a bug in your default browser."
(interactive)
(browse-url clojure-mode-report-bug-url))
(defconst clojure-guides-base-url "https://clojure.org/guides/"
"The base URL for official Clojure guides.")
(defconst clojure-guides '(("Getting Started" . "getting_started")
("FAQ" . "faq")
("spec" . "spec")
("Destructuring" . "destructuring")
("Threading Macros" . "threading_macros")
("Comparators" . "comparators")
("Reader Conditionals" . "reader_conditionals"))
"A list of all official Clojure guides.")
(defun clojure-view-guide ()
"Open a Clojure guide in your default browser.
The command will prompt you to select one of the available guides."
(interactive)
(let ((guide (completing-read "Select a guide: " (mapcar #'car clojure-guides))))
(when guide
(let ((guide-url (concat clojure-guides-base-url (cdr (assoc guide clojure-guides)))))
(browse-url guide-url)))))
(defconst clojure-reference-base-url "https://clojure.org/reference/"
"The base URL for the official Clojure reference.")
(defconst clojure-reference-sections '(("The Reader" . "reader")
("The REPL and main" . "repl_and_main")
("Evaluation" . "evaluation")
("Special Forms" . "special_forms")
("Macros" . "macros")
("Other Functions" . "other_functions")
("Data Structures" . "data_structures")
("Datatypes" . "datatypes")
("Sequences" . "sequences")
("Transients" . "transients")
("Transducers" . "transducers")
("Multimethods and Hierarchies" . "multimethods")
("Protocols" . "protocols")
("Metadata" . "metadata")
("Namespaces" . "namespaces")
("Libs" . "libs")
("Vars and Environments" . "vars")
("Refs and Transactions" . "refs")
("Agents" . "agents")
("Atoms" . "atoms")
("Reducers" . "reducers")
("Java Interop" . "java_interop")
("Compilation and Class Generation" . "compilation")
("Other Libraries" . "other_libraries")
("Differences with Lisps" . "lisps")))
(defun clojure-view-reference-section ()
"Open a Clojure reference section in your default browser.
The command will prompt you to select one of the available sections."
(interactive)
(let ((section (completing-read "Select a reference section: " (mapcar #'car clojure-reference-sections))))
(when section
(let ((section-url (concat clojure-reference-base-url (cdr (assoc section clojure-reference-sections)))))
(browse-url section-url)))))
(defconst clojure-cheatsheet-url "https://clojure.org/api/cheatsheet"
"The URL of the official Clojure cheatsheet.")
(defun clojure-view-cheatsheet ()
"Open the Clojure cheatsheet in your default browser."
(interactive)
(browse-url clojure-cheatsheet-url))
(defconst clojure-grimoire-url "https://www.conj.io/"
"The URL of the Grimoire community documentation site.")
(defun clojure-view-grimoire ()
"Open the Clojure Grimoire in your default browser."
(interactive)
(browse-url clojure-grimoire-url))
(defconst clojure-style-guide-url "https://guide.clojure.style"
"The URL of the Clojure style guide.")
(defun clojure-view-style-guide ()
"Open the Clojure style guide in your default browser."
(interactive)
(browse-url clojure-style-guide-url))
(defun clojure-space-for-delimiter-p (endp delim)
"Prevent paredit from inserting useless spaces.
See `paredit-space-for-delimiter-predicates' for the meaning of
ENDP and DELIM."
(and (not endp)
;; don't insert after opening quotes, auto-gensym syntax, or reader tags
(not (looking-back
(if (member delim clojure-omit-space-between-tag-and-delimiters)
"\\_<\\(?:'+\\|#.*\\)"
"\\_<\\(?:'+\\|#\\)")
(point-at-bol)))))
(defconst clojure--collection-tag-regexp "#\\(::[a-zA-Z0-9._-]*\\|:?\\([a-zA-Z0-9._-]+/\\)?[a-zA-Z0-9._-]+\\)"
"Collection reader macro tag regexp.
It is intended to check for allowed strings that can come before a
collection literal (e.g. '[]' or '{}'), as reader macro tags.
This includes #fully.qualified/my-ns[:kw val] and #::my-ns{:kw
val} as of Clojure 1.9.")
(make-obsolete-variable 'clojure--collection-tag-regexp nil "5.12.0")
(make-obsolete #'clojure-no-space-after-tag #'clojure-space-for-delimiter-p "5.12.0")
(declare-function paredit-open-curly "ext:paredit" t t)
(declare-function paredit-close-curly "ext:paredit" t t)
(declare-function paredit-convolute-sexp "ext:paredit")
(defun clojure--replace-let-bindings-and-indent ()
"Replace let bindings and indent."
(save-excursion
(backward-sexp)
(when (looking-back clojure--let-regexp nil)
(clojure--replace-sexps-with-bindings-and-indent))))
(defun clojure-paredit-setup (&optional keymap)
"Make \"paredit-mode\" play nice with `clojure-mode'.
If an optional KEYMAP is passed the changes are applied to it,
instead of to `clojure-mode-map'.
Also advice `paredit-convolute-sexp' when used on a let form as drop in
replacement for `cljr-expand-let`."
(when (>= paredit-version 21)
(let ((keymap (or keymap clojure-mode-map)))
(define-key keymap "{" #'paredit-open-curly)
(define-key keymap "}" #'paredit-close-curly))
(make-local-variable 'paredit-space-for-delimiter-predicates)
(add-to-list 'paredit-space-for-delimiter-predicates
#'clojure-space-for-delimiter-p)
(advice-add 'paredit-convolute-sexp :after #'clojure--replace-let-bindings-and-indent)))
(defun clojure-mode-variables ()
"Set up initial buffer-local variables for Clojure mode."
(add-to-list 'imenu-generic-expression '(nil clojure-match-next-def 0))
(setq-local indent-tabs-mode nil)
(setq-local paragraph-ignore-fill-prefix t)
(setq-local outline-regexp ";;;;* ")
(setq-local outline-level 'lisp-outline-level)
(setq-local comment-start ";")
(setq-local comment-start-skip ";+ *")
(setq-local comment-add 1) ; default to `;;' in comment-region
(setq-local comment-column 40)
(setq-local comment-use-syntax t)
(setq-local multibyte-syntax-as-symbol t)
(setq-local electric-pair-skip-whitespace 'chomp)
(setq-local electric-pair-open-newline-between-pairs nil)
(setq-local fill-paragraph-function #'clojure-fill-paragraph)
(setq-local adaptive-fill-function #'clojure-adaptive-fill-function)
(setq-local normal-auto-fill-function #'clojure-auto-fill-function)
(setq-local comment-start-skip
"\\(\\(^\\|[^\\\\\n]\\)\\(\\\\\\\\\\)*\\)\\(;+\\|#|\\) *")
(setq-local indent-line-function #'clojure-indent-line)
(setq-local indent-region-function #'clojure-indent-region)
(setq-local lisp-indent-function #'clojure-indent-function)
(setq-local lisp-doc-string-elt-property 'clojure-doc-string-elt)
(setq-local clojure-expected-ns-function #'clojure-expected-ns)
(setq-local parse-sexp-ignore-comments t)
(setq-local prettify-symbols-alist clojure--prettify-symbols-alist)
(setq-local open-paren-in-column-0-is-defun-start nil)
(setq-local beginning-of-defun-function #'clojure-beginning-of-defun-function))
(defsubst clojure-in-docstring-p ()
"Check whether point is in a docstring."
(let ((ppss (syntax-ppss)))
;; are we in a string?
(when (nth 3 ppss)
;; check font lock at the start of the string
(eq (get-text-property (nth 8 ppss) 'face)
'font-lock-doc-face))))
;;;###autoload
(define-derived-mode clojure-mode prog-mode "Clojure"
"Major mode for editing Clojure code.
\\{clojure-mode-map}"
(clojure-mode-variables)
(clojure-font-lock-setup)
(add-hook 'paredit-mode-hook #'clojure-paredit-setup)
;; `electric-layout-post-self-insert-function' prevents indentation in strings
;; and comments, force indentation of non-inlined docstrings:
(add-hook 'electric-indent-functions
(lambda (_char) (if (and (clojure-in-docstring-p)
;; make sure we're not dealing with an inline docstring
;; e.g. (def foo "inline docstring" bar)
(save-excursion
(beginning-of-line-text)
(eq (get-text-property (point) 'face)
'font-lock-doc-face)))
'do-indent))))
(defcustom clojure-verify-major-mode t
"If non-nil, warn when activating the wrong `major-mode'."
:type 'boolean
:safe #'booleanp
:package-version '(clojure-mode "5.3.0"))
(defun clojure--check-wrong-major-mode ()
"Check if the current `major-mode' matches the file extension.
If it doesn't, issue a warning if `clojure-verify-major-mode' is
non-nil."
(when (and clojure-verify-major-mode
(stringp (buffer-file-name)))
(let* ((case-fold-search t)
(problem (cond ((and (string-match "\\.clj\\'" (buffer-file-name))
(not (eq major-mode 'clojure-mode)))
'clojure-mode)
((and (string-match "\\.cljs\\'" (buffer-file-name))
(not (eq major-mode 'clojurescript-mode)))
'clojurescript-mode)
((and (string-match "\\.cljc\\'" (buffer-file-name))
(not (eq major-mode 'clojurec-mode)))
'clojurec-mode))))
(when problem
(message "[WARNING] %s activated `%s' instead of `%s' in this buffer.
This could cause problems.
\(See `clojure-verify-major-mode' to disable this message.)"
(if (eq major-mode real-this-command)
"You have"
"Something in your configuration")
major-mode
problem)))))
(add-hook 'clojure-mode-hook #'clojure--check-wrong-major-mode)
(defsubst clojure-docstring-fill-prefix ()
"The prefix string used by `clojure-fill-paragraph'.
It is simply `clojure-docstring-fill-prefix-width' number of spaces."
(make-string clojure-docstring-fill-prefix-width ? ))
(defun clojure-adaptive-fill-function ()
"Clojure adaptive fill function.
This only takes care of filling docstring correctly."
(when (clojure-in-docstring-p)
(clojure-docstring-fill-prefix)))
(defun clojure-fill-paragraph (&optional justify)
"Like `fill-paragraph', but can handle Clojure docstrings.
If JUSTIFY is non-nil, justify as well as fill the paragraph."
(if (clojure-in-docstring-p)
(let ((paragraph-start
(concat paragraph-start
"\\|\\s-*\\([(:\"[]\\|~@\\|`(\\|#'(\\)"))
(paragraph-separate
(concat paragraph-separate "\\|\\s-*\".*[,\\.]$"))
(fill-column (or clojure-docstring-fill-column fill-column))
(fill-prefix (clojure-docstring-fill-prefix)))
;; we are in a string and string start pos (8th element) is non-nil
(let* ((beg-doc (nth 8 (syntax-ppss)))
(end-doc (save-excursion
(goto-char beg-doc)
(or (ignore-errors (forward-sexp) (point))
(point-max)))))
(save-restriction
(narrow-to-region beg-doc end-doc)
(fill-paragraph justify))))
(let ((paragraph-start (concat paragraph-start
"\\|\\s-*\\([(:\"[]\\|`(\\|#'(\\)"))
(paragraph-separate
(concat paragraph-separate "\\|\\s-*\".*[,\\.[]$")))
(or (fill-comment-paragraph justify)
(fill-paragraph justify))
;; Always return `t'
t)))
(defun clojure-auto-fill-function ()
"Clojure auto-fill function."
;; Check if auto-filling is meaningful.
(let ((fc (current-fill-column)))
(when (and fc (> (current-column) fc))
(let ((fill-column (if (clojure-in-docstring-p)
clojure-docstring-fill-column
fill-column))
(fill-prefix (clojure-adaptive-fill-function)))
(do-auto-fill)))))
;;; #_ comments font-locking
;; Code heavily borrowed from Slime.
;; https://github.com/slime/slime/blob/master/contrib/slime-fontifying-fu.el#L186
(defvar clojure--comment-macro-regexp
(rx (seq (+ (seq "#_" (* " ")))) (group-n 1 (not (any " "))))
"Regexp matching the start of a comment sexp.
The beginning of match-group 1 should be before the sexp to be
marked as a comment. The end of sexp is found with
`clojure-forward-logical-sexp'.")
(defvar clojure--reader-and-comment-regexp
(rx (or (seq (+ (seq "#_" (* " ")))
(group-n 1 (not (any " "))))
(seq (group-n 1 "(comment" symbol-end))))
"Regexp matching both `#_' macro and a comment sexp." )
(defcustom clojure-comment-regexp clojure--comment-macro-regexp
"Comment mode.
The possible values for this variable are keywords indicating
what is considered a comment (affecting font locking).
- Reader macro `#_' only - the default
- Reader macro `#_' and `(comment)'"
:type '(choice (const :tag "Reader macro `#_' and `(comment)'" clojure--reader-and-comment-regexp)
(other :tag "Reader macro `#_' only" clojure--comment-macro-regexp))
:package-version '(clojure-mode . "5.7.0"))
(defun clojure--search-comment-macro-internal (limit)
"Search for a comment forward stopping at LIMIT."
(when (search-forward-regexp clojure-comment-regexp limit t)
(let* ((md (match-data))
(start (match-beginning 1))
(state (syntax-ppss start)))
;; inside string or comment?
(if (or (nth 3 state)
(nth 4 state))
(clojure--search-comment-macro-internal limit)
(goto-char start)
;; Count how many #_ we got and step by that many sexps
;; For (comment ...), step at least 1 sexp
(clojure-forward-logical-sexp
(max (count-matches (rx "#_") (elt md 0) (elt md 1))
1))
;; Data for (match-end 1).
(setf (elt md 3) (point))
(set-match-data md)
t))))
(defun clojure--search-comment-macro (limit)
"Find comment macros and set the match data.
Search from point up to LIMIT. The region that should be
considered a comment is between `(match-beginning 1)'
and `(match-end 1)'."
(let ((result 'retry))
(while (and (eq result 'retry) (<= (point) limit))
(condition-case nil
(setq result (clojure--search-comment-macro-internal limit))
(end-of-file (setq result nil))
(scan-error (setq result 'retry))))
result))
;;; General font-locking
(defun clojure-match-next-def ()
"Scans the buffer backwards for the next \"top-level\" definition.
Called by `imenu--generic-function'."
;; we have to take into account namespace-definition forms
;; e.g. s/defn
(when (re-search-backward "^[ \t]*(\\([a-z0-9.-]+/\\)?\\(def\\sw*\\)" nil t)
(save-excursion
(let (found?
(deftype (match-string 2))
(start (point)))
(down-list)
(forward-sexp)
(while (not found?)
(ignore-errors
(forward-sexp))
(or (when (char-equal ?\[ (char-after (point)))
(backward-sexp))
(when (char-equal ?\) (char-after (point)))
(backward-sexp)))
(cl-destructuring-bind (def-beg . def-end) (bounds-of-thing-at-point 'sexp)
(if (char-equal ?^ (char-after def-beg))
(progn (forward-sexp) (backward-sexp))
(setq found? t)
(when (string= deftype "defmethod")
(setq def-end (progn (goto-char def-end)
(forward-sexp)
(point))))
(set-match-data (list def-beg def-end)))))
(goto-char start)))))
(eval-and-compile
(defconst clojure--sym-forbidden-rest-chars "][\";@\\^`~\(\)\{\}\\,\s\t\n\r"
"A list of chars that a Clojure symbol cannot contain.
See definition of 'macros': URL `http://git.io/vRGLD'.")
(defconst clojure--sym-forbidden-1st-chars (concat clojure--sym-forbidden-rest-chars "0-9:'")
"A list of chars that a Clojure symbol cannot start with.
See the for-loop: URL `http://git.io/vRGTj' lines: URL
`http://git.io/vRGIh', URL `http://git.io/vRGLE' and value
definition of 'macros': URL `http://git.io/vRGLD'.")
(defconst clojure--sym-regexp
(concat "[^" clojure--sym-forbidden-1st-chars "][^" clojure--sym-forbidden-rest-chars "]*")
"A regexp matching a Clojure symbol or namespace alias.
Matches the rule `clojure--sym-forbidden-1st-chars' followed by
any number of matches of `clojure--sym-forbidden-rest-chars'."))
(defconst clojure-font-lock-keywords
(eval-when-compile
`( ;; Top-level variable definition
(,(concat "(\\(?:clojure.core/\\)?\\("
(regexp-opt '("def" "defonce"))
;; variable declarations
"\\)\\>"
;; Any whitespace
"[ \r\n\t]*"
;; Possibly type or metadata
"\\(?:#?^\\(?:{[^}]*}\\|\\sw+\\)[ \r\n\t]*\\)*"
"\\(\\sw+\\)?")
(1 font-lock-keyword-face)
(2 font-lock-variable-name-face nil t))
;; Type definition
(,(concat "(\\(?:clojure.core/\\)?\\("
(regexp-opt '("defstruct" "deftype" "defprotocol"
"defrecord"))
;; type declarations
"\\)\\>"
;; Any whitespace
"[ \r\n\t]*"
;; Possibly type or metadata
"\\(?:#?^\\(?:{[^}]*}\\|\\sw+\\)[ \r\n\t]*\\)*"
"\\(\\sw+\\)?")
(1 font-lock-keyword-face)
(2 font-lock-type-face nil t))
;; Function definition (anything that starts with def and is not
;; listed above)
(,(concat "(\\(?:" clojure--sym-regexp "/\\)?"
"\\(def[^ \r\n\t]*\\)"
;; Function declarations
"\\>"
;; Any whitespace
"[ \r\n\t]*"
;; Possibly type or metadata
"\\(?:#?^\\(?:{[^}]*}\\|\\sw+\\)[ \r\n\t]*\\)*"
(concat "\\(" clojure--sym-regexp "\\)?"))
(1 font-lock-keyword-face)
(2 font-lock-function-name-face nil t))
;; (fn name? args ...)
(,(concat "(\\(?:clojure.core/\\)?\\(fn\\)[ \t]+"
;; Possibly type
"\\(?:#?^\\sw+[ \t]*\\)?"
;; Possibly name
"\\(\\sw+\\)?" )
(1 font-lock-keyword-face)
(2 font-lock-function-name-face nil t))
;; lambda arguments - %, %&, %1, %2, etc
("\\<%[&1-9]?" (0 font-lock-variable-name-face))
;; Special forms
(,(concat
"("
(regexp-opt
'("def" "do" "if" "let" "let*" "var" "fn" "fn*" "loop" "loop*"
"recur" "throw" "try" "catch" "finally"
"set!" "new" "."
"monitor-enter" "monitor-exit" "quote") t)
"\\>")
1 font-lock-keyword-face)
;; Built-in binding and flow of control forms
(,(concat
"(\\(?:clojure.core/\\)?"
(regexp-opt
'("letfn" "case" "cond" "cond->" "cond->>" "condp"
"for" "when" "when-not" "when-let" "when-first" "when-some"
"if-let" "if-not" "if-some"
".." "->" "->>" "as->" "doto" "and" "or"
"dosync" "doseq" "dotimes" "dorun" "doall"
"ns" "in-ns"
"with-open" "with-local-vars" "binding"
"with-redefs" "with-redefs-fn"
"declare") t)
"\\>")
1 font-lock-keyword-face)
;; Macros similar to let, when, and while
(,(rx symbol-start
(or "let" "when" "while") "-"
(1+ (or (syntax word) (syntax symbol)))
symbol-end)
0 font-lock-keyword-face)
(,(concat
"\\<"
(regexp-opt
'("*1" "*2" "*3" "*agent*"
"*allow-unresolved-vars*" "*assert*" "*clojure-version*"
"*command-line-args*" "*compile-files*"
"*compile-path*" "*data-readers*" "*default-data-reader-fn*"
"*e" "*err*" "*file*" "*flush-on-newline*"
"*in*" "*macro-meta*" "*math-context*" "*ns*" "*out*"
"*print-dup*" "*print-length*" "*print-level*"
"*print-meta*" "*print-readably*"
"*read-eval*" "*source-path*"
"*unchecked-math*"
"*use-context-classloader*" "*warn-on-reflection*")
t)
"\\>")
0 font-lock-builtin-face)
;; Dynamic variables - *something* or @*something*
(,(concat "\\(?:\\<\\|/\\)@?\\(\\*" clojure--sym-regexp "\\*\\)\\>")
1 font-lock-variable-name-face)
;; Global constants - nil, true, false
(,(concat
"\\<"
(regexp-opt
'("true" "false" "nil") t)
"\\>")
0 font-lock-constant-face)
;; Character literals - \1, \a, \newline, \u0000
(,(rx "\\" (or any
"newline" "space" "tab" "formfeed" "backspace"
"return"
(: "u" (= 4 (char "0-9a-fA-F")))
(: "o" (repeat 1 3 (char "0-7"))))
word-boundary)
0 'clojure-character-face)
;; namespace definitions: (ns foo.bar)
(,(concat "(\\<ns\\>[ \r\n\t]*"
;; Possibly metadata, shorthand and/or longhand
"\\(?:\\^?\\(?:{[^}]+}\\|:[^ \r\n\t]+[ \r\n\t]\\)[ \r\n\t]*\\)*"
;; namespace
"\\(" clojure--sym-regexp "\\)")
(1 font-lock-type-face))
;; TODO dedupe the code for matching of keywords, type-hints and unmatched symbols
;; keywords: {:oneword/ve/yCom|pLex.stu-ff 0}
(,(concat "\\(:\\{1,2\\}\\)\\(" clojure--sym-regexp "?\\)\\(/\\)\\(" clojure--sym-regexp "\\)")
(1 'clojure-keyword-face)
(2 font-lock-type-face)
;; (2 'clojure-keyword-face)
(3 'default)
(4 'clojure-keyword-face))
(,(concat "\\(:\\{1,2\\}\\)\\(" clojure--sym-regexp "\\)")
(1 'clojure-keyword-face)
(2 'clojure-keyword-face))
;; type-hints: #^oneword
(,(concat "\\(#?\\^\\)\\(" clojure--sym-regexp "?\\)\\(/\\)\\(" clojure--sym-regexp "\\)")
(1 'default)
(2 font-lock-type-face)
(3 'default)
(4 'default))
(,(concat "\\(#?\\^\\)\\(" clojure--sym-regexp "\\)")
(1 'default)
(2 font-lock-type-face))
;; clojure symbols not matched by the previous regexps; influences CIDER's
;; dynamic syntax highlighting (CDSH). See https://git.io/vxEEA:
(,(concat "\\(" clojure--sym-regexp "?\\)\\(/\\)\\(" clojure--sym-regexp "\\)")
(1 font-lock-type-face)
;; 2nd and 3th matching groups can be font-locked to `nil' or `default'.
;; CDSH seems to kick in only for functions and variables referenced w/o
;; writing their namespaces.
(2 nil)
(3 nil))
(,(concat "\\(" clojure--sym-regexp "\\)")
;; this matching group must be font-locked to `nil' otherwise CDSH breaks.
(1 nil))
;; #_ and (comment ...) macros.
(clojure--search-comment-macro 1 font-lock-comment-face t)
;; Highlight `code` marks, just like `elisp'.
(,(rx "`" (group-n 1 (optional "#'")
(+ (or (syntax symbol) (syntax word)))) "`")
(1 'font-lock-constant-face prepend))
;; Highlight [[var]] comments
(,(rx "[[" (group-n 1 (optional "#'")
(+ (or (syntax symbol) (syntax word)))) "]]")
(1 'font-lock-constant-face prepend))
;; Highlight escaped characters in strings.
(clojure-font-lock-escaped-chars 0 'bold prepend)
;; Highlight grouping constructs in regular expressions
(clojure-font-lock-regexp-groups
(1 'font-lock-regexp-grouping-construct prepend))))
"Default expressions to highlight in Clojure mode.")
(defun clojure-font-lock-syntactic-face-function (state)
"Find and highlight text with a Clojure-friendly syntax table.
This function is passed to `font-lock-syntactic-face-function',
which is called with a single parameter, STATE (which is, in
turn, returned by `parse-partial-sexp' at the beginning of the
highlighted region)."
(if (nth 3 state)
;; This is a (doc)string
(let* ((startpos (nth 8 state))
(listbeg (nth 1 state))
(firstsym (and listbeg
(save-excursion
(goto-char listbeg)
(and (looking-at "([ \t\n]*\\(\\(\\sw\\|\\s_\\)+\\)")
(match-string 1)))))
(docelt (and firstsym
(function-get (intern-soft firstsym)
lisp-doc-string-elt-property))))
(if (and docelt
;; It's a string in a form that can have a docstring.
;; Check whether it's in docstring position.
(save-excursion
(when (functionp docelt)
(goto-char (match-end 1))
(setq docelt (funcall docelt)))
(goto-char listbeg)
(forward-char 1)
(ignore-errors
(while (and (> docelt 0) (< (point) startpos)
(progn (forward-sexp 1) t))
;; ignore metadata and type hints
(unless (looking-at "[ \n\t]*\\(\\^[A-Z:].+\\|\\^?{.+\\)")
(setq docelt (1- docelt)))))
(and (zerop docelt) (<= (point) startpos)
(progn (forward-comment (point-max)) t)
(= (point) (nth 8 state))))
;; In a def, at last position is not a docstring
(not (and (string= "def" firstsym)
(save-excursion
(goto-char startpos)
(goto-char (end-of-thing 'sexp))
(looking-at "[ \r\n\t]*\)")))))
font-lock-doc-face
font-lock-string-face))
font-lock-comment-face))
(defun clojure-font-lock-setup ()
"Configures font-lock for editing Clojure code."
(setq-local font-lock-multiline t)
(add-to-list 'font-lock-extend-region-functions
#'clojure-font-lock-extend-region-def t)
(setq font-lock-defaults
'(clojure-font-lock-keywords ; keywords
nil nil
(("+-*/.<>=!?$%_&:" . "w")) ; syntax alist
nil
(font-lock-mark-block-function . mark-defun)
(font-lock-syntactic-face-function
. clojure-font-lock-syntactic-face-function))))
(defun clojure-font-lock-def-at-point (point)
"Range between the top-most def* and the fourth element after POINT.
Note that this means that there is no guarantee of proper font