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Add a command to cycle parentheses () -> [] -> {} #588

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Add a command to cycle parentheses () -> [] -> {} #588

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cf9c4f0
Add a command to cycle parentheses () -> [] -> {}
nbfalcon Apr 4, 2021
ee7cf40
Add a keybinding: M-c
nbfalcon Apr 5, 2021
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3 changes: 3 additions & 0 deletions lispy-test.el
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Original file line number Diff line number Diff line change
Expand Up @@ -3032,6 +3032,9 @@ Insert KEY if there's no command."
"(foo (| bar) baz)"))
(lispy-set-key-theme '(special lispy c-digits oleh)))

(ert-deftest lispy-cycle-parens ()
(should (string= (lispy-with "(|foo)" (lispy-cycle-parens)) "[|foo]")))

(ert-deftest lispy-paredit-splice-sexp ()
(lispy-set-key-theme '(special paredit))
(should (string= (lispy-with "(foo (bar| baz) quux)"
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27 changes: 27 additions & 0 deletions lispy.el
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Expand Up @@ -9167,6 +9167,7 @@ FUNC is obtained from (`lispy--insert-or-call' DEF PLIST)."
(lispy-define-key map "O" 'lispy-oneline)
(lispy-define-key map "M" 'lispy-alt-multiline)
(lispy-define-key map "S" 'lispy-stringify)
(lispy-define-key map "M-c" 'lispy-cycle-parens)
;; marking
(lispy-define-key map "a" 'lispy-ace-symbol
:override '(cond ((looking-at lispy-outline)
Expand Down Expand Up @@ -9525,6 +9526,32 @@ When ARG is non-nil, unquote the current string."
(interactive "P")
(lispy-braces (or arg 1)))

(defun lispy-cycle-parens ()
"Cycle parenthesis types for the list at `point'.
\(\) -> [] -> {} (`clojure-mode')."
(interactive)
(let* ((bounds (or (lispy--bounds-list)
(user-error "No list at `point'")))
(open (char-after (car bounds)))
(new-pair (cond
((= open ?\() '(?\[ . ?\]))
((= open ?\[) (if (derived-mode-p 'clojure-mode)
'(?{ . ?}) '(?\( . ?\))))
((and (derived-mode-p 'clojure-mode) (= open ?\{)) '(?\( . ?\)))
(t (error "Unknow list type"))))
(old-point (point)))
(goto-char (car bounds))
(delete-char 1)
(insert (car new-pair))

(goto-char (cdr bounds))
(delete-char -1)
(insert (cdr new-pair))

;; `save-excursion' doesn't work if point is immediately after the paren
;; (point is before afterwards), so save `point' less "intelligently".
(goto-char old-point)))

(defun lispy-splice-sexp-killing-backward ()
"Forward to `lispy-raise'."
(interactive)
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