At times even little things may prove confusing, thus here's
my question (please bare with me since the topic is not overly exciting ;-)
Generally, I'm a fan of delimiting text in my code with
qq| |; or qq~ ~; Here's an example:
my $text = qq~
First line
Second line
~;
print $text;
However, lately, I started to notice (i'm wondering if I
simply ignored that aspect of Perl before) some monks using
alternative delimiters such as <<. Out of curiosity,
I gave it a try in one of my existing scripts. However,
this failed to work miserably... as will be shown below.
Here's a sample tiny script that works:
print <<END
Hello there!
This is a test!
END
Here, I attempt to add an extra line just below print:
print <<END
Hello there!
This is a test!
END
my $i;
and this failes with the error:
syntax error at text_delim.pl line 11, near "my "
Global symbol "$i" requires explicit package name at text_delim.pl lin
+e 11.
Yet, when I add a ; below the line containing closing END, the error
disappears and I can run script well.
print <<END
Hello there!
This is a test!
END
;
my $i;
Strange thing is, however, that I always assumed there should be no ';' after the closing
line/word of the << text delimiter. Since, also a code like this
always worked for me (strangely enough, I never noticed or paid much
attention to the ';' after the first <<END either):
print <<END;
Hello there!
This is a test!
END
my $i;
Could anyone explain me why there should be a ';' in there at all?
And also, why is it permissable to place ';' in either of the two
places. What's the difference?
Thanks.
|
"There is no system but GNU, and Linux is one of its kernels." -- Confession of Faith
|
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