bug#21875: 24.5; Invalid tokens in smie indentation rules

[Glenn Morris <rgm@gnu.org>]

Stefan, FYI:


mail@ap4y.me wrote:

> For the simple grammar like this:
>
> (id)
> (inst ("if" exp "begin" insts "end")
>       (exp))
> (insts (insts ";" insts) (inst))
> (exp (exp "." id)
>      (id ":" exp)
>      (exp "=" exp))
> (exps (exps "," exps) (exp))
>
> And lexer rule that overrides braces with begin/end tokens, for example
> like this:
>
> ((looking-at "{") (forward-char 1) "begin")
> ((looking-at "}") (forward-char 1) "end")
>
> When trying to indent such construction:
>
> if true {
>     bar
> |}
>
> I'm recieveing indentation request for :close-all '}', but no such
> token was returned by lexer, full log:
>
> forward: 19 -> 20 = end
> backward: 20 -> 19 = end
> backward: 19 -> 18 = ;
> backward: 18 -> 15 = bar
> backward: 15 -> 9 = begin
> backward: 9 -> 4 = true
> backward: 4 -> 1 = if
> :close-all '}'; sibling-p:t parent:(nil 1 if) hanging:nil == nil
> backward: 20 -> 19 = end
> backward: 19 -> 18 = ;
> backward: 18 -> 15 = bar
> backward: 15 -> 9 = begin
> backward: 9 -> 4 = true
> backward: 4 -> 1 = if
>
>
>
> In GNU Emacs 24.5.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.16.6)
>  of 2015-09-10 on foutrelis
> Windowing system distributor `The X.Org Foundation', version 11.0.11702000
> System Description:	Arch Linux
>
> Configured using:
>  `configure --prefix=/usr --sysconfdir=/etc --libexecdir=/usr/lib
>  --localstatedir=/var --with-x-toolkit=gtk3 --with-xft
>  'CFLAGS=-march=x86-64 -mtune=generic -O2 -pipe -fstack-protector-strong
>  --param=ssp-buffer-size=4' CPPFLAGS=-D_FORTIFY_SOURCE=2
>  LDFLAGS=-Wl,-O1,--sort-common,--as-needed,-z,relro'
>
> Important settings:
>   value of $EMACSLOADPATH: /home/ap4y/github/swift-mode/.cask/24.5.1/elpa/flycheck-cask-20150920.453:/home/ap4y/github/swift-mode/.cask/24.5.1/elpa/flycheck-20151027.755:/home/ap4y/github/swift-mode/.cask/24.5.1/elpa/dash-20151021.113:/home/ap4y/github/swift-mode/.cask/24.5.1/elpa/pkg-info-20150517.443:/home/ap4y/github/swift-mode/.cask/24.5.1/elpa/epl-20150517.433:/home/ap4y/github/swift-mode/.cask/24.5.1/elpa/let-alist-1.0.4:/home/ap4y/github/swift-mode/.cask/24.5.1/elpa/s-20150924.406:/usr/share/emacs/24.5/lisp:/usr/share/emacs/24.5/lisp/vc:/usr/share/emacs/24.5/lisp/url:/usr/share/emacs/24.5/lisp/textmodes:/usr/share/emacs/24.5/lisp/progmodes:/usr/share/emacs/24.5/lisp/play:/usr/share/emacs/24.5/lisp/org:/usr/share/emacs/24.5/lisp/nxml:/usr/share/emacs/24.5/lisp/net:/usr/share/emacs/24.5/lisp/mh-e:/usr/share/emacs/24.5/lisp/mail:/usr/share/emacs/24.5/lisp/leim:/usr/share/emacs/24.5/lisp/language:/usr/share/emacs/24.5/lisp/international:/usr/share/emacs/24.5/lisp/gnus:/usr/share/emacs/24.5/lisp/eshell:/usr/share/emacs/24.5/lisp/erc:/usr/share/emacs/24.5/lisp/emulation:/usr/share/emacs/24.5/lisp/emacs-parallel:/usr/share/emacs/24.5/lisp/emacs-lisp:/usr/share/emacs/24.5/lisp/cedet:/usr/share/emacs/24.5/lisp/calendar:/usr/share/emacs/24.5/lisp/calc:/usr/share/emacs/24.5/lisp/obsolete
>   value of $LANG: en_US.UTF-8
>   locale-coding-system: utf-8-unix
>
> Major mode: Swift
>
> Minor modes in effect:
>   tooltip-mode: t
>   electric-indent-mode: t
>   mouse-wheel-mode: t
>   tool-bar-mode: t
>   menu-bar-mode: t
>   file-name-shadow-mode: t
>   global-font-lock-mode: t
>   font-lock-mode: t
>   blink-cursor-mode: t
>   auto-composition-mode: t
>   auto-encryption-mode: t
>   auto-compression-mode: t
>   line-number-mode: t
>   transient-mark-mode: t
>
> Recent messages:
> For information about GNU Emacs and the GNU system, type C-h C-a.
> File mode specification error: (wrong-type-argument stringp func-args)
>
> Load-path shadows:
> None found.