version 1.126, 2014/03/31 01:05:32 |
version 1.127, 2014/06/22 16:39:45 |
Line 873 Note that macros like |
|
Line 873 Note that macros like |
|
.Sx \&BR |
.Sx \&BR |
open and close a font scope for each argument. |
open and close a font scope for each argument. |
.Sh COMPATIBILITY |
.Sh COMPATIBILITY |
This section documents areas of questionable portability between |
This section mentions some areas of questionable portability between |
implementations of the |
implementations of the |
.Nm |
.Nm |
language. |
language. |
|
More incompatibilities exist. |
.Pp |
.Pp |
.Bl -dash -compact |
.Bl -dash -compact |
.It |
.It |
Line 888 to close out a literal context opened with |
|
Line 889 to close out a literal context opened with |
|
.Sx \&nf . |
.Sx \&nf . |
This behaviour may not be portable. |
This behaviour may not be portable. |
.It |
.It |
In quoted literals, GNU troff allowed pair-wise double-quotes to produce |
|
a standalone double-quote in formatted output. |
|
It is not known whether this behaviour is exhibited by other formatters. |
|
.It |
|
troff suppresses a newline before |
troff suppresses a newline before |
.Sq \(aq |
.Sq \(aq |
macro output; in mandoc, it is an alias for the standard |
macro output; in mandoc, it is an alias for the standard |
.Sq \&. |
.Sq \&. |
control character. |
control character. |
.It |
.It |
The |
|
.Sq \eh |
|
.Pq horizontal position , |
|
.Sq \ev |
|
.Pq vertical position , |
|
.Sq \em |
|
.Pq text colour , |
|
.Sq \eM |
|
.Pq text filling colour , |
|
.Sq \ez |
|
.Pq zero-length character , |
|
.Sq \ew |
|
.Pq string length , |
|
.Sq \ek |
|
.Pq horizontal position marker , |
|
.Sq \eo |
|
.Pq text overstrike , |
|
and |
|
.Sq \es |
|
.Pq text size |
|
escape sequences are all discarded in mandoc. |
|
.It |
|
The |
|
.Sq \ef |
|
scaling unit is accepted by mandoc, but rendered as the default unit. |
|
.It |
|
The |
|
.Sx \&sp |
|
macro does not accept negative values in mandoc. |
|
In GNU troff, this would result in strange behaviour. |
|
.It |
|
In page header lines, GNU troff versions up to and including 1.21 |
In page header lines, GNU troff versions up to and including 1.21 |
only print |
only print |
.Ar volume |
.Ar volume |
Line 944 is given, like in |
|
Line 910 is given, like in |
|
.El |
.El |
.Pp |
.Pp |
The |
The |
.Sx OP |
.Sx EE , |
macro is part of the extended |
.Sx EX , |
|
.Sx OP , |
|
.Sx UE , |
|
and |
|
.Sx UR |
|
macros are part of the GNU extended |
.Nm |
.Nm |
macro set, and may not be portable to non-GNU troff implementations. |
macro set, and may not be portable to non-GNU troff implementations. |
.Sh SEE ALSO |
.Sh SEE ALSO |