diff options
| author | Ingo Schwarze <schwarze@cvs.openbsd.org> | 2014-04-08 01:36:51 +0000 |
|---|---|---|
| committer | Ingo Schwarze <schwarze@cvs.openbsd.org> | 2014-04-08 01:36:51 +0000 |
| commit | 149824b7264545f9974f31e6f67169fbb8b4c5aa (patch) | |
| tree | a4346fea6ca694967bbb166496d2e86ff0835cc0 /share/man/man7 | |
| parent | d2ccc22d72cf638e29f0322fbde6a4c0a792d006 (diff) | |
Fully implement the \B (validate numerical expression) and
partially implement the \w (measure text width) escape sequence
in a way that makes them usable in numerical expressions and in
conditional requests, similar to how \n (interpolate number register)
and \* (expand user-defined string) are implemented.
This lets mandoc(1) handle the baroque low-level roff code
found at the beginning of the ggrep(1) manual.
Thanks to pascal@ for the report.
Diffstat (limited to 'share/man/man7')
| -rw-r--r-- | share/man/man7/roff.7 | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/share/man/man7/roff.7 b/share/man/man7/roff.7 index 39019cd2195..577817788fb 100644 --- a/share/man/man7/roff.7 +++ b/share/man/man7/roff.7 @@ -1,4 +1,4 @@ -.\" $OpenBSD: roff.7,v 1.32 2014/04/07 15:05:12 schwarze Exp $ +.\" $OpenBSD: roff.7,v 1.33 2014/04/08 01:36:50 schwarze Exp $ .\" .\" Copyright (c) 2010, 2011, 2012 Kristaps Dzonsons <kristaps@bsd.lv> .\" Copyright (c) 2010, 2011, 2013, 2014 Ingo Schwarze <schwarze@openbsd.org> @@ -15,7 +15,7 @@ .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. .\" -.Dd $Mdocdate: April 7 2014 $ +.Dd $Mdocdate: April 8 2014 $ .Dt ROFF 7 .Os .Sh NAME @@ -1170,10 +1170,15 @@ Digit width space character. Anchor definition; ignored by .Xr mandoc 1 . .Ss \eB\(aq Ns Ar string Ns \(aq -Test whether +Interpolate +.Sq 1 +if .Ar string -is a numerical expession; ignored by -.Xr mandoc 1 . +conforms to the syntax of +.Sx Numerical expressions +explained above and +.Sq 0 +otherwise. .Ss \eb\(aq Ns Ar string Ns \(aq Bracket building function; ignored by .Xr mandoc 1 . @@ -1297,9 +1302,13 @@ Vertical motion; ignored by .Xr mandoc 1 . .Ss \ew\(aq Ns Ar string Ns \(aq Interpolate the width of the -.Ar string ; -ignored by -.Xr mandoc 1 . +.Ar string . +The +.Xr mandoc 1 +implementation assumes that after expansion of user-defined strings, the +.Ar string +only contains normal characters, no escape sequences, and that each +character has a width of 24 basic units. .Ss \eX\(aq Ns Ar string Ns \(aq Output .Ar string |