[bug #64862] [tbl] clobbers value of previously selected font

[G. Branden Robinson]

URL:
  <https://savannah.gnu.org/bugs/?64862>

                 Summary: [tbl] clobbers value of previously selected font
                   Group: GNU roff
               Submitter: gbranden
               Submitted: Sun 05 Nov 2023 10:10:08 PM UTC
                Category: Preprocessor tbl
                Severity: 3 - Normal
              Item Group: Incorrect behaviour
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: None


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Follow-up Comments:


-------------------------------------------------------
Date: Sun 05 Nov 2023 10:10:08 PM UTC By: G. Branden Robinson <gbranden>
Input:


$ cat does-tbl-preserve-font-selections.roff 
.ft 2
.nr p \n(.f
.ft 3
.nr c \n(.f
Font selections before tbl: previous=\np, current=\nc
.ft
2 ?= \n(.f
.ft
.br
before table, font is \n(.f
.TS
box;
Lf(CR).
This is a table.
.TE
after table, font is \n(.f
.br
.nr c \n(.f
.ft
.nr p \n(.f
Font selections after tbl: previous=\np, current=\nc


Output:


$ nroff -t -Tascii EXPERIMENTS/does-tbl-preserve-font-selections.roff | cat
-s
troff:EXPERIMENTS/does-tbl-preserve-font-selections.roff:14: warning: cannot
select font 'CR'
troff:EXPERIMENTS/does-tbl-preserve-font-selections.roff:14: warning: cannot
select font 'CR'
Font selections before tbl: previous=2, current=3 2 ?= 2
before table, font is 3
+------------------+
| This is a table. |
+------------------+
after table, font is 3
Font selections after tbl: previous=3, current=3



I expect GNU _tbl_ to put things back the way they were before the table
region.

For what it's worth, DWB and Heirloom Doctools _tbl_ don't, either.







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