paragraph mode

[Larry]

Is there any exact definition of "paragraph mode", i.e.

$/ = '';

Everything I've seen has been somewhat vague. In particular, I am
noticing on ActiveState/Win32 that the Hex sequence "0d 0a 20 0d 0a"
is NOT being treated as a "paragraph boundary" (quite annoyingly).
For some reason the space character alone on a line invalidates it.
However, I am quite sure I have seen "0a 20 0a" treated as a
"paragraph boundary" under Linux (can't test it so easily right now).

What is the correct behavior?

 

[Tad McClellan]

Is there any exact definition of "paragraph mode", i.e.

$/ = '';

In perlvar.pod, where else?

Everything I've seen has been somewhat vague.

It seems pretty clear to me...

In particular, I am
noticing on ActiveState/Win32 that the Hex sequence "0d 0a 20 0d 0a"
is NOT being treated as a "paragraph boundary" (quite annoyingly).
For some reason the space character alone on a line invalidates it.

Because if there is a character on the line, then it is
not an empty line!

However, I am quite sure I have seen "0a 20 0a" treated as a
"paragraph boundary" under Linux (can't test it so easily right now).

I doubt it.

What is the correct behavior?

$/ The input record separator, newline by default. This influences
Perl’s idea of what a "line" is. Works like awk’s RS variable,
including treating empty lines as a terminator if set to the null
string. (An empty line cannot contain any spaces or tabs.)

 

[Jorgen Grahn]

....


I doubt it.

Yes; "Linux" most likely have no particular opinion about paragraphs.

On the other hand, emacs' backward-paragraph function /does/ treat a
line with a blankspace as a paragraph separator. I didn't expect it
to, but it did.

/Jorgen