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| author | G. Branden Robinson <g.branden.robinson@gmail.com> | 2023-03-05 03:10:48 -0600 |
|---|---|---|
| committer | G. Branden Robinson <g.branden.robinson@gmail.com> | 2023-03-09 13:05:00 -0600 |
| commit | 10f779d5485494fad0989fc7406edf6ab6497d34 (patch) | |
| tree | 997cd61aa8081ada492383a2c02ea5f6392e056c | |
| parent | 6f45c33bdf3168708081a1acac09c1c22ddcf0f2 (diff) | |
| download | groff-git-10f779d5485494fad0989fc7406edf6ab6497d34.tar.gz | |
[docs]: Fix Savannah #63812.
* doc/groff.texi (Operators in Conditionals):
* man/groff.7.in (Conditional expressions): Clarify how the output
comparison operator is recognized.
Fixes <https://savannah.gnu.org/bugs/?63812>. Thanks to John Gardner
for the report.
| -rw-r--r-- | ChangeLog | 9 | ||||
| -rw-r--r-- | doc/groff.texi | 11 | ||||
| -rw-r--r-- | man/groff.7.man | 17 |
3 files changed, 34 insertions, 3 deletions
@@ -1,5 +1,14 @@ 2023-03-07 G. Branden Robinson <g.branden.robinson@gmail.com> + * doc/groff.texi (Operators in Conditionals): + * man/groff.7.in (Conditional expressions): Clarify how the + output comparison operator is recognized. + + Fixes <https://savannah.gnu.org/bugs/?63812>. Thanks to John + Gardner for the report. + +2023-03-05 G. Branden Robinson <g.branden.robinson@gmail.com> + [tbl]: Trivially refactor. Rename variables and functions to use the term "rule" rather than "line". The value of the term "rule" is that it is not confusable with "lines" of (text) input diff --git a/doc/groff.texi b/doc/groff.texi index 5c4af4fc9..7e300dbef 100644 --- a/doc/groff.texi +++ b/doc/groff.texi @@ -12571,8 +12571,19 @@ certain other @code{troff} implementations.@footnote{This refers to @code{vtroff}, a translator that would convert the C/A/T output from early-vintage @acronym{AT&T} @code{troff} to a form suitable for Versatec and Benson-Varian plotters.} +@end table + +If the first argument to an @code{if}, @code{ie}, or @code{while} +request begins with a non-alphanumeric character apart from @code{!} +(see below); it performs an @slanted{output comparison test}. +@footnote{Strictly, letters not otherwise recognized @emph{are} treated +as output comparison delimiters. For portability, it is wise to avoid +using letters not in the list above; for example, Plan@tie{}9 +@code{troff} uses @samp{h} to test a mode it calls @code{htmlroff}, and +GNU @code{troff} may provide additional operators in the future.} @cindex output comparison operator +@table @code @item @code{'}@var{xxx}@code{'}@var{yyy}@code{'} True if formatting the comparands @var{xxx} and @var{yyy} produces the same output commands. The delimiter need not be a neutral apostrophe: diff --git a/man/groff.7.man b/man/groff.7.man index 0d0539a98..e16ec458f 100644 --- a/man/groff.7.man +++ b/man/groff.7.man @@ -10,7 +10,7 @@ language reference .\" Legal Terms .\" ==================================================================== .\" -.\" Copyright (C) 2000-2018, 2020-2022 Free Software Foundation, Inc. +.\" Copyright (C) 2000-2023 Free Software Foundation, Inc. .\" .\" This file is part of groff, the GNU roff type-setting system. .\" @@ -2099,9 +2099,20 @@ T} . . .P -The first of the above, +If the first argument to an +.BR .if , +.BR .ie , +or +.B .while +request begins with a non-alphanumeric character apart from +.B !\& +(see below); +it performs an +.I output comparison test. +. +Shown first in the table above, the -.I "output comparison operator," +.I output comparison operator interpolates a true value if formatting its comparands .I s1 and |