Update of bug #64790 (project groff):
Status: None => Rejected
Assigned to: None => gbranden
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Follow-up Comment #1:
[comment #0 original submission:]
> Subject: [troff] use default value zero for ligatures and kerning in
> nroff mode
>
> Currently both "global_ligature_mode" and "global_kerning_mode" (in
> src/roff/troff/node.cpp) are set to the value one (1, true) for both
> nroff and troff mode.
>
> But in nroff mode the fonts do neither have ligatures nor kerning
> data,
> so the software is executing code, that in effect changes nothing,
> but uses energy for nothing.
>
> The forgoing variables should therefore be initialised to zero
> (0, false) in nroff mode.
>
> Also add a warning when ligature or kerning is asked for when in
> nroff mode.
I don't think these are good ideas. Generally, typesetter-specific features
are silently ignored for nroff-mode devices. (One day, when I recast the
"typesetters/terminals/troff mode/nroff mode" node of our Texinfo manual, I'll
cover this more explicitly.)
Similarly, escape sequences that change the font slant or height are ignored
in nroff mode; they don't produce diagnostic messages.
My impression is that this was a deliberate design choice to keep document
authors from having to lard their documents with `if n` and `if t` conditional
requests except where necessary.
Closing as rejected.
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