URL:
<https://savannah.gnu.org/bugs/?63635>
Summary: [troff] support `hydefault` register or similar
Project: GNU troff
Submitter: gbranden
Submitted: Mon 09 Jan 2023 04:20:38 PM UTC
Category: Core
Severity: 3 - Normal
Item Group: Feature change
Status: None
Privacy: Public
Assigned to: None
Open/Closed: Open
Discussion Lock: Any
Planned Release: None
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Follow-up Comments:
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Date: Mon 09 Jan 2023 04:20:38 PM UTC By: G. Branden Robinson <gbranden>
A comment in tmac/an-ext.tmac says it all.
.\" In AT&T troff, there was no register exposing the hyphenation mode,
.\" and no way to save and restore it.
In man pages, we see people fiddle with `hy` requests, often seemingly under
the assumption that it works like `ft`; that calling it without arguments will
restore the previous setting.
But it doesn't, and never has. `.hy` without an argument means `.hy 1`, which
is just about useless for all our hyphenation patterns.
I propose to add a (writable) internal register, `hydefault`, to house that
value that an argumentless `hy` request will set.
Its default value (in the formatter) would be `1`, retaining 50 years of AT&T
troff compatibility.
However, in groff's localization files, this register would be updated to
something sensible for the locale.
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