Re: incorrect @math spacing for PDF output with an empty macro

[Jacob Bachmeyer]

Vincent Lefevre wrote:
> On 2022-10-14 21:42:27 +0100, Gavin Smith wrote:
>   
> [...]
> > In your use case, you can avoid line breaks using the @w command:
> >
> > @deftypefun int f4 ()
> > @w{@math{@var{n} = -2}}.
> > @end deftypefun
> >     
>
> If the @w ignored in math mode?
>
> [...]
>
> For PDF output, I want the spaces to be the usual ones that are
> generated in math mode.
>   

For TeX, Texinfo "@w{...}" is effectively TeX "\hbox{...}".  The key to 
Gavin's example is that the @math{} is the argument to @w{}.  This 
suppresses line breaks, but sets the expression in ordinary math mode, 
so the spaces will be the normal math spacing.  In plain TeX, that line 
would be "\hbox{$\var{n} = -2$}" (assuming a \var macro as Texinfo 
defines) if that helps.


-- Jacob