* [9fans] troff ignoring .eo/.ec after first time
@ 2007-11-21 22:06 Pietro Gagliardi
2007-11-21 22:39 ` Martin Neubauer
2007-11-22 16:55 ` Russ Cox
0 siblings, 2 replies; 3+ messages in thread
From: Pietro Gagliardi @ 2007-11-21 22:06 UTC (permalink / raw)
To: Fans of the OS Plan 9 from Bell Labs
Hello. Try this:
tbl /n/sources/contrib/pietro/plan9prog.ms | troff -ms | page
On about the third page, some code begins, but at the print()
statement at the end there is some strangeness. If you look inside
the .ms file, there are some .eo and .ec requests. .eo turns off \x
and .ec turns it back on. But why is it ignored after that first
page, which works correctly?
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [9fans] troff ignoring .eo/.ec after first time
2007-11-21 22:06 [9fans] troff ignoring .eo/.ec after first time Pietro Gagliardi
@ 2007-11-21 22:39 ` Martin Neubauer
2007-11-22 16:55 ` Russ Cox
1 sibling, 0 replies; 3+ messages in thread
From: Martin Neubauer @ 2007-11-21 22:39 UTC (permalink / raw)
To: Fans of the OS Plan 9 from Bell Labs
ms(6) says:
Many nroff and troff
requests are unsafe in conjunction with this package, but
the following requests may be used with impunity after the
first .PP: `.bp', `.br', `.sp', `.ls', `.na'.
Maybe this helps,
Martin
* Pietro Gagliardi (pietro10@mac.com) wrote:
> Hello. Try this:
>
> tbl /n/sources/contrib/pietro/plan9prog.ms | troff -ms | page
>
> On about the third page, some code begins, but at the print()
> statement at the end there is some strangeness. If you look inside
> the .ms file, there are some .eo and .ec requests. .eo turns off \x
> and .ec turns it back on. But why is it ignored after that first
> page, which works correctly?
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [9fans] troff ignoring .eo/.ec after first time
2007-11-21 22:06 [9fans] troff ignoring .eo/.ec after first time Pietro Gagliardi
2007-11-21 22:39 ` Martin Neubauer
@ 2007-11-22 16:55 ` Russ Cox
1 sibling, 0 replies; 3+ messages in thread
From: Russ Cox @ 2007-11-22 16:55 UTC (permalink / raw)
To: 9fans
> On about the third page, some code begins, but at the print()
> statement at the end there is some strangeness. If you look inside
> the .ms file, there are some .eo and .ec requests. .eo turns off \x
> and .ec turns it back on. But why is it ignored after that first
> page, which works correctly?
assuming that /n/sourcesdump/2007/1122/contrib/pietro/plan9prog.ms
is the file in question, the first page isn't "working" correctly either,
since your
print("hello, world\n");
turns into
print("hello, world0);
because the \n" interpolates the " register.
the reason that .eo doesn't manage to turn this off is that
the text between .P1 and .P2 gets copied into a troff
diversion for later processing, and that later processing
happens during the execution of .P2, by which time your idiom
.P1
.eo
text
.ec
.P2
has restored \ as the escape character.
you can get your desired effect by doing
.P1
.eo
text
.P2
.ec
instead.
russ
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2007-11-22 16:55 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2007-11-21 22:06 [9fans] troff ignoring .eo/.ec after first time Pietro Gagliardi
2007-11-21 22:39 ` Martin Neubauer
2007-11-22 16:55 ` Russ Cox
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