============================================================== LuaTeX 1.13.1 2021-04-02 ==============================================================

Fixed an unwanted space in btex etex in metapost, introduced after a patch for troff.

-- luigi

On 9/2/2021 3:15 PM, Linas Stonys wrote:

Hi, from time to time I face the problem where I need to do something inside tex group (simple group or box or table cell) or to mark up some content with tex4ht tags ( or tagging pdf ) and sometimes \aftergroup is not enough.   So I would like to ask about new token or token list which would be inserted before current group end (\beforeendgroup).

EXAMPLE: \showboxdepth=\maxdimen \showboxbreadth=\maxdimen b \hbox{x\aftergroup d  x} c \showlists

LOG OUTPUT: \tenrm b \glue(\spaceskip) 3.33333 plus 1.66666 minus 1.11111 \hbox(4.30554+0.0)x13.88893, direction TLT .\tenrm x .\glue(\spaceskip) 3.33333 plus 1.66666 minus 1.11111 .\tenrm x \tenrm d \glue(\spaceskip) 3.33333 plus 1.66666 minus 1.11111 \tenrm c

COULD BE: b \hbox{x\beforeendgroup d  x} c \showlists

LOG OUTPUT: \tenrm b \glue(\spaceskip) 3.33333 plus 1.66666 minus 1.11111 \hbox(4.30554+0.0)x13.88893, direction TLT .\tenrm x .\glue(\spaceskip) 3.33333 plus 1.66666 minus 1.11111 .\tenrm x .\tenrm d \tenrm c

Of course here needs to think about several same macros how they should queue the content.

In luametatex we have

\starttext

{[test\atendofgroup{]}

\stoptext

(plus more)

Hans

----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------

Am 02.09.21 um 16:18 schrieb Linas Stonys:

wow! Indeed there is a lot useful primitives (\ifempty, ifrelax, ... often would be used

I'm not sure that syntactic sugar (ie commands that are trivial to implement) is something that should be added to the engines

but the two you suggested, ie gaining control at the very start of paragraph processing and just before a group ends, are two things that the engines really don't offer unless you totally disable most of the processing and figure out for yourself when it would be time to switch to hmode (which while theoretically doable is not really a practical option). As both have useful applications (and should be fairly easy to provide in all engines those are two that I think are worth pursuing

my 2cents - Frank

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Content preview: Am 02.09.21 um 16:18 schrieb Linas Stonys: > wow! Indeed there is a lot useful primitives (\ifempty, ifrelax, ... > often would be used I'm not sure that syntactic sugar (ie commands that are trivial [...]

Content analysis details: (9.5 points, 5.0 required)

pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 USER_IN_BLOCKLIST_TO User is listed in 'blocklist_to' 10 USER_IN_BLACKLIST_TO DEPRECATED: See USER_IN_BLOCKLIST_TO -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] 0.7 SPF_SOFTFAIL SPF: sender does not match SPF record (softfail) 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 1.0 RDNS_DYNAMIC Delivered to internal network by host with dynamic-looking rDNS -0.7 NICE_REPLY_A Looks like a legit reply (A) 0.4 KHOP_HELO_FCRDNS Relay HELO differs from its IP's reverse DNS

(Sorry for the delay, I wanted to be sure that building phase was over)

============================================================== LuaTeX 1.17.0 2023-04-29 ==============================================================

- A breaking backward compatibility change: by default the socket library is not enabled . The new option --socket enable the socket library as before, as also --shell-escape (without --shell-restricted); --nosocket, --no-socket , --safer disabled the library, and they have the priority in case of conflicting options. The mime library is always available; socket.sleep and socket.gettime are duplicated as os.socketsleep and os.socketgettime, both always available. The new os.kpsepopen replace io.popopen in kpse mode (i.e. when kpse_init is not zero) as it was before but the permission now cannot be changed anymore with kpse.check_permission . The function os.kpsepopen follows the same restrictions as io.popen . Thanks to Max Chernoff for debugging.

--luigi