[bug #62825] Incorrect section number using \*($n in a header

[anonymous]

URL:
  <https://savannah.gnu.org/bugs/?62825>

                 Summary: Incorrect section number using \*($n in a header
                 Project: GNU troff
               Submitter: None
               Submitted: Wed 27 Jul 2022 08:18:06 PM UTC
                Category: Macro me
                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: Wed 27 Jul 2022 08:18:06 PM UTC By: Anonymous
When re-defining the $h macro for a custom header when using -me, putting the
section number in the header with \*($n results in the number being off by one
(e.g. 1.1 instead of 1.2). This can be seen by running groff -me on this
example:


.de $h
.tl 'Chapter \\n(ch'Section \\*($n'Page \\n%'
.hl
..
.$c
.sh 2 "Section 1.1"
.lp
This is the first section.
.bp
.sh 2 "Section 1.2"
.lp
This is the second section.
.bp
.sh 2 "Section 1.3"
.lp
This is the third section.


Here's the output when running nroff -ww -me:


$ nroff -ww -me section_test.roff | cat -s
troff: section_test.roff:5: warning: number register 'ch' not defined
troff: section_test.roff:5: warning: macro '$n' not defined
troff: section_test.roff:5: warning: macro '$C' not defined
troff: section_test.roff:6: warning: number register '$1' not defined

Chapter 0                 Section                     Page 1
_________________________________________________________________

                         CHAPTER  1

1.1.  Section 1.1

This is the first section.

Chapter 1                Section 1.1                  Page 2
_________________________________________________________________

1.2.  Section 1.2

This is the second section.

Chapter 1                Section 1.2                  Page 3
_________________________________________________________________

1.3.  Section 1.3

This is the third section.


I don't mind the section number (and chapter number) being off on the first
page, as I always suppress the header anyhow on the first page of a new
chapter. But the wrong section numbers in the headers of subsequent pages is
an issue. If there's something I'm doing wrong, or if there's a simple
fix/workaround I could use, then that would be good to know. Otherwise I guess
it's a bug.







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