[bug #63332] recent fallbacks.tmac change degrades ASCII output

[G. Branden Robinson]

Follow-up Comment #8, bug #63332 (project groff):

Hi Dave,

[comment #7 comment #7:]
> I'll reply more fully later, but I want to address one point now:
> 
> [comment #5 comment #5:]
> > > This means the other "t" conditionals in fallbacks.tmac also
> > > don't do what was intended.
> > 
> > I don't think that's true.
> 
> It's easy enough to demonstrate: pick a definition where     > Weirdly, even
adding the line ".if t .tm troff mode" to that file prints "troff mode" on
stderr when groff is run with -Tascii.  I presume this is because tmac/troffrc
loads fallbacks.tmac before loading the device-specific .tmac file.


Right.  The device description file doesn't say whether it's a "troff" or
"nroff" device; instead a request does that.

    > This means the other "t" conditionals in fallbacks.tmac also don't do
what was intended.

fallbacks.tmac makes a distinction based on the n/t mode, such as:
> 
> .ie t .fchar \[u2012] \v'-.3m'\l'\w"\0"u\[ru]'\v'+.3m'\" figure dash
> .el   .fchar \[u2012] \-
> 
> 
> $ echo '3\[u2012]4' | groff -Tascii | cat -s
> 3_4
> 
> 
> Were this working as designed, we'd see a hyphen in the output rather than
an underscore.

Ah, I see what you mean.  We were both saying true things but somehow I
managed to infer an incorrect one from you.  On re-reading, I'm not sure how.

> > > Weirdly, even adding the line ".if t .tm troff mode" to that file prints
"troff mode" on stderr when groff is run with -Tascii.  I presume this is
because tmac/troffrc loads fallbacks.tmac before loading the device-specific
.tmac file.

> > Right.  The device description file doesn't say whether it's a "troff" or
"nroff" device; instead a request does that.

> > > This means the other "t" conditionals in fallbacks.tmac also don't do
what was intended.

I concur.


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