Intro per calcolare-lisp-indent
Una soluzione migliore è ignorare la funzione calculate-lisp-indent. In breve, calculate-lisp-indentè una funzione che restituisce la colonna a cui deve essere rientrata una linea nel punto. Questa funzione è ciò che indica lisp-indent-functionquanto ogni riga deve essere rientrata. (vedi anche il mio post su reddit per maggiori informazioni).
Confronto con altre risposte
Il vantaggio che questa risposta ha rispetto all'utilizzo della funzione modificata di Fuco1 è che (1) risolve la radice del problema che si trova calculate-lisp-indentinvece di ripulire dopo il rientro errato restituito da calculate-lisp-indent(2) si generalizza in elenchi quotati e retroquotati (e funziona indipendentemente dal fatto che siano citati / retroquistati in modo esplicito o con e` '). Funziona anche con citazioni e backquotes arbitrariamente nidificati.
Il vantaggio che questa risposta ha rispetto alla sostituzione lisp-indent-functioncon la common-lisp-indent-functionfunzione è che non ha l'effetto collaterale di incasinare altre rientranze elisp. Elisp e common-lisp sono rientrati in modo diverso.
Come funziona
Questo condizionale (in calculate-lisp-indent) è ciò che decide se un sexp è rientrato come una funzione o meno. Ciò che rientra nella sua clausola else è rientrato come una funzione. Ciò che cade nella clausola if, è rientrato normalmente (sotto l'elemento corrente). Per far rientrare gli elenchi quotati come dati anziché come funzioni, è necessario aggiungere un ulteriore controllo per i casi in cui l'elenco è quotato nel predicato condizionale.
(if (= (point) calculate-lisp-indent-last-sexp)
;; Containing sexp has nothing before this line
;; except the first element. Indent under that element.
nil
;; Skip the first element, find start of second (the first
;; argument of the function call) and indent under.
(progn (forward-sexp 1)
(parse-partial-sexp (point)
calculate-lisp-indent-last-sexp
0 t)))
Questo codice controlla le parentesi aperte del sexp che è rientrato. Se è sexp con in sexp multipli controlla tutti. Restituisce t se trova dei sessi citati o retroquotati.
(let* ((positions (elt state 9))
(last (car (last positions)))
(rest (nreverse (butlast positions)))
(any-quoted-p nil)
(point nil))
(or
(when-let (char last)
(or (char-equal char ?')
(char-equal char ?`)))
(while (and rest (not any-quoted-p))
(setq point (pop rest))
(setq any-quoted-p
(or
(when-let (char point)
(or (char-equal char ?')
(char-equal char ?`)))
(save-excursion
(goto-char (1+ point))
(looking-at-p "\\(?:back\\)?quote[\t\n\f\s]+(")))))))
indennità
Se si desidera che un elenco che inizia con una parola chiave sia rientrato come dati anche se non quotato, aggiungerlo come un altro controllo al predicato condizionale. Ciò può essere utile per le macro in cui i plist non sono citati per comodità come in defhydra .
(when-let (char-after (char-after (1+ containing-sexp)))
(char-equal char-after ?:))
Esempi
Lo snippet di codice completo che ho pubblicato di seguito funziona con il caso che hai citato e altro. Per favore, provalo!
;; Your example
`(:token ,token
:token-quality ,quality)
;; Other cool examples
(quote (hi im gosu
the best vayne player))
'(i am the phantom of
the opera)
'((angel of music
hide no longer))
(backquote (past the point
no return
... the final chapter))
`(fee fi fo
fum)
;; should indent it like a function.
(iamafunction arg1
arg2
arg3)
Per una spiegazione più approfondita di come funziona, vedi il mio post su reddit .
Snippet di codice completo
Ecco lo snippet di codice completo.
(advice-add #'calculate-lisp-indent :override #'void~calculate-lisp-indent)
(defun void~calculate-lisp-indent (&optional parse-start)
"Add better indentation for quoted and backquoted lists."
;; This line because `calculate-lisp-indent-last-sexp` was defined with `defvar`
;; with it's value ommited, marking it special and only defining it locally. So
;; if you don't have this, you'll get a void variable error.
(defvar calculate-lisp-indent-last-sexp)
(save-excursion
(beginning-of-line)
(let ((indent-point (point))
state
;; setting this to a number inhibits calling hook
(desired-indent nil)
(retry t)
calculate-lisp-indent-last-sexp containing-sexp)
(cond ((or (markerp parse-start) (integerp parse-start))
(goto-char parse-start))
((null parse-start) (beginning-of-defun))
(t (setq state parse-start)))
(unless state
;; Find outermost containing sexp
(while (< (point) indent-point)
(setq state (parse-partial-sexp (point) indent-point 0))))
;; Find innermost containing sexp
(while (and retry
state
(> (elt state 0) 0))
(setq retry nil)
(setq calculate-lisp-indent-last-sexp (elt state 2))
(setq containing-sexp (elt state 1))
;; Position following last unclosed open.
(goto-char (1+ containing-sexp))
;; Is there a complete sexp since then?
(if (and calculate-lisp-indent-last-sexp
(> calculate-lisp-indent-last-sexp (point)))
;; Yes, but is there a containing sexp after that?
(let ((peek (parse-partial-sexp calculate-lisp-indent-last-sexp
indent-point 0)))
(if (setq retry (car (cdr peek))) (setq state peek)))))
(if retry
nil
;; Innermost containing sexp found
(goto-char (1+ containing-sexp))
(if (not calculate-lisp-indent-last-sexp)
;; indent-point immediately follows open paren.
;; Don't call hook.
(setq desired-indent (current-column))
;; Find the start of first element of containing sexp.
(parse-partial-sexp (point) calculate-lisp-indent-last-sexp 0 t)
(cond ((looking-at "\\s(")
;; First element of containing sexp is a list.
;; Indent under that list.
)
((> (save-excursion (forward-line 1) (point))
calculate-lisp-indent-last-sexp)
;; This is the first line to start within the containing sexp.
;; It's almost certainly a function call.
(if (or
;; Containing sexp has nothing before this line
;; except the first element. Indent under that element.
(= (point) calculate-lisp-indent-last-sexp)
;; First sexp after `containing-sexp' is a keyword. This
;; condition is more debatable. It's so that I can have
;; unquoted plists in macros. It assumes that you won't
;; make a function whose name is a keyword.
;; (when-let (char-after (char-after (1+ containing-sexp)))
;; (char-equal char-after ?:))
;; Check for quotes or backquotes around.
(let* ((positions (elt state 9))
(last (car (last positions)))
(rest (reverse (butlast positions)))
(any-quoted-p nil)
(point nil))
(or
(when-let (char (char-before last))
(or (char-equal char ?')
(char-equal char ?`)))
(progn
(while (and rest (not any-quoted-p))
(setq point (pop rest))
(setq any-quoted-p
(or
(when-let (char (char-before point))
(or (char-equal char ?')
(char-equal char ?`)))
(save-excursion
(goto-char (1+ point))
(looking-at-p
"\\(?:back\\)?quote[\t\n\f\s]+(")))))
any-quoted-p))))
;; Containing sexp has nothing before this line
;; except the first element. Indent under that element.
nil
;; Skip the first element, find start of second (the first
;; argument of the function call) and indent under.
(progn (forward-sexp 1)
(parse-partial-sexp (point)
calculate-lisp-indent-last-sexp
0 t)))
(backward-prefix-chars))
(t
;; Indent beneath first sexp on same line as
;; `calculate-lisp-indent-last-sexp'. Again, it's
;; almost certainly a function call.
(goto-char calculate-lisp-indent-last-sexp)
(beginning-of-line)
(parse-partial-sexp (point) calculate-lisp-indent-last-sexp
0 t)
(backward-prefix-chars)))))
;; Point is at the point to indent under unless we are inside a string.
;; Call indentation hook except when overridden by lisp-indent-offset
;; or if the desired indentation has already been computed.
(let ((normal-indent (current-column)))
(cond ((elt state 3)
;; Inside a string, don't change indentation.
nil)
((and (integerp lisp-indent-offset) containing-sexp)
;; Indent by constant offset
(goto-char containing-sexp)
(+ (current-column) lisp-indent-offset))
;; in this case calculate-lisp-indent-last-sexp is not nil
(calculate-lisp-indent-last-sexp
(or
;; try to align the parameters of a known function
(and lisp-indent-function
(not retry)
(funcall lisp-indent-function indent-point state))
;; If the function has no special alignment
;; or it does not apply to this argument,
;; try to align a constant-symbol under the last
;; preceding constant symbol, if there is such one of
;; the last 2 preceding symbols, in the previous
;; uncommented line.
(and (save-excursion
(goto-char indent-point)
(skip-chars-forward " \t")
(looking-at ":"))
;; The last sexp may not be at the indentation
;; where it begins, so find that one, instead.
(save-excursion
(goto-char calculate-lisp-indent-last-sexp)
;; Handle prefix characters and whitespace
;; following an open paren. (Bug#1012)
(backward-prefix-chars)
(while (not (or (looking-back "^[ \t]*\\|([ \t]+"
(line-beginning-position))
(and containing-sexp
(>= (1+ containing-sexp) (point)))))
(forward-sexp -1)
(backward-prefix-chars))
(setq calculate-lisp-indent-last-sexp (point)))
(> calculate-lisp-indent-last-sexp
(save-excursion
(goto-char (1+ containing-sexp))
(parse-partial-sexp (point) calculate-lisp-indent-last-sexp 0 t)
(point)))
(let ((parse-sexp-ignore-comments t)
indent)
(goto-char calculate-lisp-indent-last-sexp)
(or (and (looking-at ":")
(setq indent (current-column)))
(and (< (line-beginning-position)
(prog2 (backward-sexp) (point)))
(looking-at ":")
(setq indent (current-column))))
indent))
;; another symbols or constants not preceded by a constant
;; as defined above.
normal-indent))
;; in this case calculate-lisp-indent-last-sexp is nil
(desired-indent)
(t
normal-indent))))))
Note finali
Vale la pena notare che questa domanda sarebbe meglio generalizzata su come impedire a emacs di indentare liste quotate e non quotate come funzioni .