* Using smie for Relax NG compact syntax
@ 2015-02-09 15:49 Nikolai Weibull
2015-02-09 16:56 ` Stefan Monnier
0 siblings, 1 reply; 6+ messages in thread
From: Nikolai Weibull @ 2015-02-09 15:49 UTC (permalink / raw)
To: Emacs Users
Hi!
I’m trying to set up a grammar for Relax NG’s compact syntax and am
trying to get something as simple as
element a {
empty
}
to work, but I’m not succeeding:
(unless rnc-mode-syntax-table
(setq rnc-mode-syntax-table (make-syntax-table))
(modify-syntax-entry ?\{ "(}" rnc-mode-syntax-table)
(modify-syntax-entry ?\} "){" rnc-mode-syntax-table))
(defconst rnc-mode-smie-grammar
(smie-prec2->grammar
(smie-bnf->prec2
'((id)
(pattern ("element" id "{" pattern "}") ("empty"))))))
and
(defun rnc-mode-smie-rules (kind token)
(pcase (cons kind token)
(`(:elem .basic) rnc-indent-level)))
rnc-mode-smie-forward-token and rnc-mode-smie-backward-token are
basically smie-default-forward-token and smie-default-backward-token.
The indentation after a { at the end of a line doesn’t agree with the
rules at all and I can’t understand why. The keyword “element” is
being highlighted as show-paren-mismatch, which I also don’t
understand, as there’s a whole pattern in
element a {
empty
}
Any obvious issues here?
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: Using smie for Relax NG compact syntax
2015-02-09 15:49 Using smie for Relax NG compact syntax Nikolai Weibull
@ 2015-02-09 16:56 ` Stefan Monnier
2015-02-10 7:17 ` Nikolai Weibull
0 siblings, 1 reply; 6+ messages in thread
From: Stefan Monnier @ 2015-02-09 16:56 UTC (permalink / raw)
To: help-gnu-emacs
> (pattern ("element" id "{" pattern "}") ("empty"))))))
Better make this
(pattern ("element" id) ("empty"))))))
Since you want "{" to be an "opener" (i.e. something similar to an open
parenthesis) whereas if it's in the middle of a production rule it won't
be treated as an opener.
Stefan
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: Using smie for Relax NG compact syntax
2015-02-09 16:56 ` Stefan Monnier
@ 2015-02-10 7:17 ` Nikolai Weibull
2015-02-10 20:13 ` Stefan Monnier
0 siblings, 1 reply; 6+ messages in thread
From: Nikolai Weibull @ 2015-02-10 7:17 UTC (permalink / raw)
To: Stefan Monnier; +Cc: Emacs Users
On Mon, Feb 9, 2015 at 5:56 PM, Stefan Monnier <monnier@iro.umontreal.ca> wrote:
>> (pattern ("element" id "{" pattern "}") ("empty"))))))
>
> Better make this
>
> (pattern ("element" id) ("empty"))))))
>
> Since you want "{" to be an "opener" (i.e. something similar to an open
> parenthesis) whereas if it's in the middle of a production rule it won't
> be treated as an opener.
OK. This results in an assertion failing in smie-prec2->grammar:
(cl-assert (numberp (car cons)))
that I can’t seem to resolve.
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: Using smie for Relax NG compact syntax
2015-02-10 7:17 ` Nikolai Weibull
@ 2015-02-10 20:13 ` Stefan Monnier
2015-02-11 7:55 ` Nikolai Weibull
0 siblings, 1 reply; 6+ messages in thread
From: Stefan Monnier @ 2015-02-10 20:13 UTC (permalink / raw)
To: help-gnu-emacs
> OK. This results in an assertion failing in smie-prec2->grammar:
> (cl-assert (numberp (car cons)))
I'd need more info to figure out what's going on. E.g. a backtrace,
and maybe the chunk of code where it signals the error.
Stefan
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: Using smie for Relax NG compact syntax
2015-02-10 20:13 ` Stefan Monnier
@ 2015-02-11 7:55 ` Nikolai Weibull
2015-02-11 15:54 ` Stefan Monnier
0 siblings, 1 reply; 6+ messages in thread
From: Nikolai Weibull @ 2015-02-11 7:55 UTC (permalink / raw)
To: Stefan Monnier; +Cc: Emacs Users
[-- Attachment #1: Type: text/plain, Size: 1113 bytes --]
On Tue, Feb 10, 2015 at 9:13 PM, Stefan Monnier
<monnier@iro.umontreal.ca> wrote:
>> OK. This results in an assertion failing in smie-prec2->grammar:
>> (cl-assert (numberp (car cons)))
>
> I'd need more info to figure out what's going on. E.g. a backtrace,
> and maybe the chunk of code where it signals the error.
Yeah, sorry. Here’s the whole rnc-mode.el. The backtrace doesn’t
seem to tell us much (parts of the backtrace that only involve
invoking eval-buffer have been elided):
Debugger entered--Lisp error: (cl-assertion-failed (numberp (car cons)))
signal(cl-assertion-failed ((numberp (car cons))))
smie-prec2->grammar(#s(hash-table size 65 test equal rehash-size 1.5
rehash-threshold 0.8 data (:smie-open/close-alist (("element" .
opener)) :smie-closer-alist nil ...)))
(defconst rnc-mode-smie-grammar (smie-prec2->grammar
(smie-bnf->prec2 (quote ((id) (pattern ("element" id) ("empty")))))))
eval-buffer() ; Reading at buffer position 2901
#<subr call-interactively>(eval-buffer record nil)
funcall(#<subr call-interactively> eval-buffer record nil)
…
[-- Attachment #2: rnc-mode.el --]
[-- Type: application/octet-stream, Size: 4102 bytes --]
(require 'smie)
(defgroup rnc nil
"Major mode for editing Relax NG Compact code."
:prefix "rnc-"
:group 'languages)
(defcustom rnc-indent-level 2
"Indentation of Relax NG Compact statements."
:type 'integer
:group 'rnc)
(defconst rnc-font-lock-keywords
(list
'("\\b\\(?:attribute\\|element\\)\\s-*\\(\\\\?\\sw\\(?:\\sw\\|\\s_\\)*\\)\\b"
1 font-lock-variable-name-face)
'("^\\s-*\\(default\\(?:\\s-+namespace\\)?\\|namespace\\|datatypes\\)\\b"
1 font-lock-preprocessor-face)
'("^\\s-*\\(\\\\?\\sw\\(?:\\sw\\|\\s_\\)*\\)\\s-*="
1 font-lock-variable-name-face)
(list (concat
"\\b"
(regexp-opt
'("empty"
"list"
"mixed"
"string"
"text"
"token"))
"\\b")
0 'font-lock-type-face)
(list (concat
"\\b"
(regexp-opt
'("attribute"
"div"
"element"
"external"
"grammar"
"include"
"inherit"
"notAllowed"
"parent"
"start"))
"\\b")
0 'font-lock-keyword-face))
"Keywords to higlight in rnc-mode.")
(defvar rnc-mode-abbrev-table nil
"Abbreviation table used in rnc-mode.")
(define-abbrev-table 'rnc-mode-abbrev-table ())
(defvar rnc-mode-map nil
"Keymap used in rnc-mode.")
(unless rnc-mode-map
(setq rnc-mode-map (make-sparse-keymap)))
(defvar rnc-mode-syntax-table nil
"Syntax table in use for rnc-mode buffers.")
(unless rnc-mode-syntax-table
(setq rnc-mode-syntax-table (make-syntax-table))
(modify-syntax-entry ?' "\"" rnc-mode-syntax-table)
(modify-syntax-entry ?\" "\"" rnc-mode-syntax-table)
(modify-syntax-entry ?# "<" rnc-mode-syntax-table)
(modify-syntax-entry ?\n ">" rnc-mode-syntax-table)
(modify-syntax-entry ?\\ "\\" rnc-mode-syntax-table)
(modify-syntax-entry ?. "_" rnc-mode-syntax-table)
(modify-syntax-entry ?- "_" rnc-mode-syntax-table)
(modify-syntax-entry ?_ "_" rnc-mode-syntax-table)
(modify-syntax-entry ?+ "." rnc-mode-syntax-table)
(modify-syntax-entry ?* "." rnc-mode-syntax-table)
(modify-syntax-entry ?? "." rnc-mode-syntax-table)
(modify-syntax-entry ?& "." rnc-mode-syntax-table)
(modify-syntax-entry ?| "." rnc-mode-syntax-table)
(modify-syntax-entry ?= "." rnc-mode-syntax-table)
(modify-syntax-entry ?~ "." rnc-mode-syntax-table)
(modify-syntax-entry ?\( "()" rnc-mode-syntax-table)
(modify-syntax-entry ?\) ")(" rnc-mode-syntax-table)
(modify-syntax-entry ?\{ "(}" rnc-mode-syntax-table)
(modify-syntax-entry ?\} "){" rnc-mode-syntax-table)
(modify-syntax-entry ?\[ "(]" rnc-mode-syntax-table)
(modify-syntax-entry ?\] ")[" rnc-mode-syntax-table))
(defconst rnc-mode-smie-grammar
(smie-prec2->grammar
(smie-bnf->prec2
'((id)
(pattern ("element" id)
("empty"))))))
(defun rnc-mode-smie-forward-token ()
(smie-default-forward-token))
(defun rnc-mode-smie-backward-token ()
(smie-default-backward-token))
(defun rnc-mode-smie-rules (kind token)
(pcase (cons kind token)
(`(:elem . basic) rnc-indent-level)))
;;;###autoload
(defun rnc-mode ()
"Major mode for editing RELAX NG Compact Syntax schemas.
\\{rnc-mode-map}"
(interactive)
(kill-all-local-variables)
(use-local-map rnc-mode-map)
(set-syntax-table rnc-mode-syntax-table)
(setq local-abbrev-table rnc-mode-abbrev-table)
(set (make-local-variable 'font-lock-defaults)
'((rnc-font-lock-keywords) nil nil ((?. . "w") (?- . "w") (?_ . "w"))))
(set (make-local-variable 'comment-start) "#")
(set (make-local-variable 'comment-end) "")
(set (make-local-variable 'comment-start-skip) "\\([ \t]*\\)##?[ \t]*")
(smie-setup rnc-mode-smie-grammar #'rnc-mode-smie-rules
:forward-token #'rnc-mode-smie-forward-token
:backward-token #'rnc-mode-smie-backward-token)
(setq mode-name "RNC"
major-mode 'rnc-mode)
(run-mode-hooks 'rnc-mode-hook))
;;;###autoload
(add-to-list 'auto-mode-alist (cons (purecopy "\\.rnc\\'") 'rnc-mode))
(provide 'rnc-mode)
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: Using smie for Relax NG compact syntax
2015-02-11 7:55 ` Nikolai Weibull
@ 2015-02-11 15:54 ` Stefan Monnier
0 siblings, 0 replies; 6+ messages in thread
From: Stefan Monnier @ 2015-02-11 15:54 UTC (permalink / raw)
To: Nikolai Weibull; +Cc: Emacs Users
> Yeah, sorry. Here’s the whole rnc-mode.el. The backtrace doesn’t
> seem to tell us much (parts of the backtrace that only involve
> invoking eval-buffer have been elided):
Looks like a bug in smie.el, which should disappear when you grow your
grammar. You can remove the (cl-assert (numberp (car cons))) in smie.el
to work around the problem, or more simply add some dummy thing in `id',
such as:
(defconst rnc-mode-smie-grammar
(smie-prec2->grammar
(smie-bnf->prec2
'((id ("(" id ")"))
(pattern ("element" id)
("empty"))))))
-- Stefan
^ permalink raw reply [flat|nested] 6+ messages in thread
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2015-02-09 15:49 Using smie for Relax NG compact syntax Nikolai Weibull
2015-02-09 16:56 ` Stefan Monnier
2015-02-10 7:17 ` Nikolai Weibull
2015-02-10 20:13 ` Stefan Monnier
2015-02-11 7:55 ` Nikolai Weibull
2015-02-11 15:54 ` Stefan Monnier
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