[bug #66040] groff no longer warns about unrecognized .hcode input

[Dave]

URL:
  <https://savannah.gnu.org/bugs/?66040>

                 Summary: groff no longer warns about unrecognized .hcode
input
                   Group: GNU roff
               Submitter: barx
               Submitted: Mon 29 Jul 2024 02:07:31 AM CDT
                Category: Core
                Severity: 2 - Minor
              Item Group: Warning/Suspicious 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: Mon 29 Jul 2024 02:07:31 AM CDT By: Dave <barx>
The Texinfo manual states about .hcode, "A hyphenation code must be an
ordinary character (not a special character escape sequence) other than a
digit or a space."  Thus the following warning, as emitted by groff 1.23.0:

$ echo ".hcode \['e] \['e]" | groff -ww
troff:<standard input>:1: error: hyphenation code must be ordinary character

But this warning has disappeared in a groff built from recent (circa two weeks
ago) git code:

$ groff --version | head -1
GNU groff version 1.23.0.1528-d5d4-dirty
$ echo ".hcode \['e] \['e]" | groff -ww
$

Does this mean that the manual is out of date--that bug #42870 has been fixed
and .hcode now recognizes special character escape sequences as hyphenation
codes?

Sadly, no.  As the test file below shows, the .hcode request still fails to
process the \['e] escape as a hyphenation code; groff simply no longer
notifies the user of this.

$ file resume
resume: troff or preprocessor input, ISO-8859 text
$ iconv -f iso-8859-1 resume
.ll 1n
r\['e]sum\['e]
.hcode \['e] \['e]
r\['e]sum\['e]
.hcode \['e] é
r\['e]sum\['e]
$ groff -a -ww -Wbreak resume
<beginning of page>
r<'e>sum<'e>
r<'e>sum<'e>
r<'e><hy>
sum<'e>









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