Improve the smartparens' setup and add sp-eval-expression'

README.org

@@ -4977,12 +4977,9 @@ Links for further investigation are:
 #+name: lst:setup-go
 #+begin_src emacs-lisp -n :results silent
 (when (featurep 'treesit)
-  ;; Set `tab-width' in `after-change-major-mode-hook' function too.
   (setopt go-ts-mode-indent-offset 2)
-  (add-hook 'after-change-major-mode-hook
-            (defun on-go-ts-mode-hook ()
-              (when (derived-mode-p 'go-ts-mode 'go-mod-ts-mode)
-                (setq-local tab-width 2))))
+  (add-hook 'go-ts-mode-hook (lambda ()
+                               (setq-local tab-width 2)))
   (add-to-list 'auto-mode-alist `(,(rx ".go" eos) . go-ts-mode)))
 #+end_src
 
@@ -5627,13 +5624,15 @@ following links show how to put the documentation to practical use:
 3. [[https://lists.gnu.org/archive/html/help-gnu-emacs/2014-07/msg00135.html][How to enable smartparens in the minibuffer after eval-expression]] explains
    how the machinery after the first and after later usages of =eval-expression=
    differ and discusses options how to handle those differences.
-Listing [[lst:configure-smartparens]] aims to configure [[https://github.com/Fuco1/smartparens][smartparens]] for Go, LaTeX,
-Lisp dialects, Org, and Python.  Execute src_emacs-lisp[:results
+Listing [[lst:setup-smartparens]] aims to setup [[https://github.com/Fuco1/smartparens][smartparens]] for Go, LaTeX, Lisp
+dialects, Org, and Python.  Execute src_emacs-lisp[:results
 none]{(sp-cheat-sheet)} for short documentation taking into account the
-overridden key bindings in listing [[lst:configure-smartparens]].  Table
+overridden key bindings in listing [[lst:setup-smartparens]].  Table
 [[tab:smartparens-commands-and-bindings]] lists commands with key bindings taken in
 order from src_emacs-lisp[:results none]{(sp-cheat-sheet)} that takes the
-overrides of listing [[lst:configure-smartparens]] into account.
+overrides of listing [[lst:setup-smartparens]] into account.  Finally, listing
+[[lst:sp-eval-expression]] defines an alternative to =eval-expression= enabling
+=smartparens-strict-mode= and =font-lock-mode=.
 
 Despite the provocative post [[https://andreyorst.gitlab.io/posts/2022-02-20-what-if-structural-editing-was-a-mistake/]["What if structural editing was a mistake?"]],
 [[https://github.com/Fuco1/smartparens][smartparens]] is one of my favorite packages. In particular, [[https://github.com/Fuco1/smartparens][smartparens]] handles
@@ -5643,34 +5642,31 @@ inside source blocks) correctly.  Therefore, [[https://smartparens.readthedocs.i
 matching pairs immediately in front or after point in such files correctly,
 contrary to for instance [[https://github.com/Fanael/rainbow-delimiters#readme][rainbow-delimiters]].
 
-#+caption[Configure =smartparens=]:
-#+caption: Configure =smartparens=.
-#+name: lst:configure-smartparens
+#+caption[Setup =smartparens=]:
+#+caption: Setup =smartparens=.
+#+name: lst:setup-smartparens
 #+begin_src emacs-lisp -n :results silent
-(when (and (ensure-package-installation 'smartparens)
-           ;; Require `smartparens-config' instead of `smartparens' to
-           ;; disable pairing of the quote character for lisp modes.
-           (require 'smartparens-config nil 'noerror))
+(when (ensure-package-installation 'smartparens)
+  ;; GAV: Documentation says to require `smartparens-config'.
+  (require 'smartparens-config)
   (setopt sp-base-key-bindings 'sp
           sp-override-key-bindings '(("C-(" . sp-backward-slurp-sexp)
                                      ("C-)" . sp-forward-slurp-sexp)
                                      ("C-M-(" . sp-backward-barf-sexp)
                                      ("C-M-)" . sp-forward-barf-sexp)))
 
-  (when (fboundp 'smartparens-mode)
-    (dolist (symbol '(conf-toml-mode-hook prog-mode-hook text-mode-hook))
-      (add-hook symbol #'smartparens-mode)))
+  (add-hook 'conf-toml-mode-hook #'smartparens-mode)
+  (add-hook 'prog-mode-hook      #'smartparens-mode)
+  (add-hook 'text-mode-hook      #'smartparens-mode)
 
-  (when (fboundp 'smartparens-strict-mode)
-    (dolist (symbol '(emacs-lisp-mode-hook
-                      go-ts-mode-hook
-                      ielm-mode-hook
-                      inferior-python-mode-hook
-                      lisp-data-mode-hook
-                      lisp-mode-hook
-                      python-mode-hook
-                      sly-mrepl-mode-hook))
-      (add-hook symbol #'smartparens-strict-mode)))
+  (add-hook 'emacs-lisp-mode-hook      #'smartparens-strict-mode)
+  (add-hook 'go-ts-mode-hook           #'smartparens-strict-mode)
+  (add-hook 'ielm-mode-hook            #'smartparens-strict-mode)
+  (add-hook 'inferior-python-mode-hook #'smartparens-strict-mode)
+  (add-hook 'lisp-data-mode-hook       #'smartparens-strict-mode)
+  (add-hook 'lisp-mode-hook            #'smartparens-strict-mode)
+  (add-hook 'python-mode-hook          #'smartparens-strict-mode)
+  (add-hook 'sly-mrepl-mode-hook       #'smartparens-strict-mode)
 
   (when (fboundp 'go-ts-mode)
     ;; Stolen from `smartparens-go':
@@ -5731,6 +5727,34 @@ contrary to for instance [[https://github.com/Fanael/rainbow-delimiters#readme][
 | sp-mark-sexp                   | {{{kbd(C-M-SPC)}}}         |          |
 |--------------------------------+----------------------------+----------|
 
+#+caption[Define =sp-eval-expression= with =smartparens= support]:
+#+caption: Define =sp-eval-expression= enabling =smartparens-strict-mode=
+#+caption: and =font-lock-mode=.
+#+name: lst:sp-eval-expression
+#+begin_src emacs-lisp -n :results silent
+(with-eval-after-load 'smartparens
+  ;; https://lists.gnu.org/archive/html/help-gnu-emacs/2014-07/msg00135.html
+  ;; GAV: Reuse `read--expresssion-map' instead of defining my own map.
+  (defun sp--read-expression (prompt &optional initial-contents)
+    (let ((minibuffer-completing-symbol t))
+      (minibuffer-with-setup-hook
+          (lambda ()
+            (emacs-lisp-mode) ; Enables `smartparens-strict-mode' too.
+            (use-local-map read--expression-map)
+            (font-lock-mode t))
+        (read-from-minibuffer prompt initial-contents
+                              read--expression-map nil
+                              'read-expression-history))))
+
+  (defun sp-eval-expression (expression &optional arg)
+    "Evaluate EXPRESSION with `smartparens' support."
+    (interactive (list (read (sp--read-expression "SP eval: "))
+                       current-prefix-arg))
+    (if arg
+        (insert (pp-to-string (eval expression lexical-binding)))
+      (pp-display-expression (eval expression lexical-binding)
+                             "*SP Eval Output*"))))
+#+end_src
 
 ** [[https://github.com/davidshepherd7/electric-operator#readme][Electric operators]]
 :PROPERTIES:
@@ -5756,19 +5780,16 @@ formatter for Python]].
 :CUSTOM_ID: sec:smart-snippets
 :END:
 
-#+caption[Enable =yas-global-mode=]:
-#+caption: Enable =yas-global-mode=.
-#+name: lst:enable-yas-global-mode
+#+caption[Setup =yasnippet=]:
+#+caption: Setup =yasnippet=.
+#+name: lst:setup-yasnippet
 #+begin_src emacs-lisp -n :results silent
 (when (ensure-package-installation 'yasnippet)
   ;; Set `yas-alias-to-yas/prefix-p' before loading `yasnippet'.
   (setopt yas-alias-to-yas/prefix-p nil)
-  (when (fboundp 'yas-minor-mode)
-    (dolist (symbol '(LaTeX-mode-hook
-                      org-mode-hook
-                      python-mode-hook
-                      python-ts-mode-hook))
-      (add-hook symbol #'yas-minor-mode))))
+  (add-hook 'LaTeX-mode-hook #'yas-minor-mode)
+  (add-hook 'org-mode-hook #'yas-minor-mode)
+  (add-hook 'python-mode-hook #'yas-minor-mode))
 #+end_src
 
 * [[info:emacs#Display][Display (info)]]
@@ -5848,12 +5869,11 @@ and names in buffers for debugging.
 #+name: lst:setup-rainbow-mode
 #+begin_src emacs-lisp -n :results silent
 (when (ensure-package-installation 'rainbow-mode)
+  ;; GAV: Do not add `rainbow-mode' to any programming language hook,
+  ;; since that interferes at least with Org export to LaTeX.
   (setopt rainbow-x-colors-major-mode-list
           (list 'c++-mode 'c-mode 'emacs-lisp-mode 'inferior-emacs-lisp-mode
-                'lisp-interaction-mode 'org-mode 'python-mode))
-  ;; GAV: How to disable `rainbow-mode' on `emacs-lisp-mode-hook'?
-  (dolist (symbol '(python-mode-hook))
-    (add-hook symbol #'rainbow-mode)))
+                'lisp-interaction-mode 'org-mode 'python-mode)))
 #+end_src
 
 ** [[https://karthinks.com/software/batteries-included-with-emacs/][Flash the line around point for visual feedback]]
@@ -5881,11 +5901,10 @@ point movements visually.
         (pulse-delay 0.1))
     (pulse-momentary-highlight-one-line (point))))
 
-(dolist (command '(scroll-up-command
-                   scroll-down-command
-                   recenter-top-bottom
-                   other-window))
-  (advice-add command :after #'flash-line-around-point))
+(advice-add 'scroll-up-command   :after #'flash-line-around-point)
+(advice-add 'scroll-down-command :after #'flash-line-around-point)
+(advice-add 'recenter-top-bottom :after #'flash-line-around-point)
+(advice-add 'other-window        :after #'flash-line-around-point)
 #+end_src
 
 * Applications