Re: Generalising @def*

On Fri, Feb 10, 2023 at 01:35:15PM +0000, Gavin Smith wrote:
> On Thu, Feb 02, 2023 at 07:14:53PM +0000, Gavin Smith wrote:
> > I imagine that there would be another type of block
> > like @defblock ... @end defblock which could contain the @def lines,
> > which would allow the same formatting without the use of @macro.
> 
> I expect that I'll be able to implement this in texinfo.tex.
> My current work is at the end of this mail.
> 
> I've commented out the code to create the index entry in \printdefunline,
> which until recently wasn't part of \printdefunline anyway, so it should
> be straightforward to remove this once I reverse the changes to introduce
> a @useindex command.  Apart from this, adding a new block command for
> a definition block, along with new line commands to print definition lines,
> seems straightforward.  With the patch below, the following input outputs
> as you would expect.

I have understood that the use can use any index command, simply by
adding it before the @deflinex, but I did not understand where the user
definition comes in?

> \input texinfo
> 
> @defblock
> @deflinex Functionoid bar (args)
> @deflinex Monoid bar2 (args, nineyy)
> hello
> 
> @end defblock
> 
> @bye 
> 
> I expect that once this is in texi2any, any @?index lines in
> the @defblock should be handled along with recent/ongoing changes
> for copiable anchor links for definition commands.
> 
> User-defined definition commands could be limited to macros that use
> @deflinex (or similar line commands that we will introduce).  There
> will be no definitions on the @defblock line itself.  Thus we can avoid
> or delay the question of allowing users to define their own block commands
> with a corresponding "@end" line.
> 
> I'll post more once this work is more complete.
> 
> 
> diff --git a/doc/texinfo.tex b/doc/texinfo.tex
> index 0f57611a5e..b1e3cb8cee 100644
> --- a/doc/texinfo.tex
> +++ b/doc/texinfo.tex
> @@ -7570,9 +7570,9 @@ might help (with 'rm \jobname.?? \jobname.??s')%
>      % call \deffooheader:
>      #1#2 \endheader
>      % create the index entry
> -    \defcharsdefault
> -    \edef\temp{\noexpand\doind{\the\defidx}{\the\deftext}}%
> -    \temp
> +    % \defcharsdefault
> +    % \edef\temp{\noexpand\doind{\the\defidx}{\the\deftext}}%
> +    % \temp
>      % common ending:
>      \interlinepenalty = 10000
>      \advance\rightskip by 0pt plus 1fil\relax
> @@ -7587,6 +7587,19 @@ might help (with 'rm \jobname.?? \jobname.??s')%
>  
>  \def\Edefun{\endgraf\medbreak}
>  
> +\envdef\defblock{%
> +  \startdefun
> +}
> +\let\Edefblock\Edefun
> +
> +\def\deflineheader#1 #2 #3\endheader{%
> +  \defname{#1}{}{#2}\magicamp\defunargs{#3\unskip}%
> +}
> +
> +\def\deflinex{%
> +    \parseargusing\activeparens{\printdefunline\deflineheader}%
> +}
> +
>  % \makedefun{deffoo} (\deffooheader parameters) { (\deffooheader expansion) }
>  %
>  % Define \deffoo, \deffoox  \Edeffoo and \deffooheader.
> 
>