Rob Richardson wrote:
> Dave,
>
> Your response dovetails nicely with my next question.
I don't think the list has a response from Dave at the time of writing?
> The module I'm working in begins as follows:
>
> use warnings;
> use strict;
> use CGI qw/:standard center strong *big delete_all/;
'strong' and 'big' are exported by default as part of ':standard'.
'center' has to be imported explicitly.
> After putting parentheses after my calls to "br", the program compiled
> and started running.
Calls to 'br' shouldn't need parentheses. The subroutine is prototyped
and Perl knows what it is before you use it.
> It barfed, though, at the following line:
>
> $htmlString = p(center(strong("There are not any trains running on this
> day.<br>Use the date dropdowns above to select a different day.")));
>
> It complained that $Schedule::strong was undefined. As you
> illustrated, changing "strong" to "CGI::strong" fixed that problem, and
> it proceeded to complain about "$Schedule::center" being undefined.
So after the code you show, you have a 'package Schedule'.
> I had thought that the "use CGI" line would tell Perl enough about
> those functions that I wouldn't have to qualify them.
Chris's response to your previous thread explained this. Your call to
'use CGI' imports the nmaes into 'main' - the default package before
you declare anything different. You then have '$CGI::strong' and
'$main::strong' as synonyms for the same subroutine. There is still,
however, no 'Schedule::strong'.
> What do I have
> to do to avoid putting the package name before every subroutine that
> doesn't come from the package I'm developing? For a complicated
> program, I would imagine qualifying every subroutine call would get
> very cumbersome!
use strict;
use warnings;
package Schedule;
use CGI qw/:standard center delete_all/;
my $htmlString = p( center( strong(
'There are not any trains running on this day.', br,
'Use the date dropdowns above to select a different day.' )));
> P.S. In the little test program, if I leave the semicolon off the last
> line, it compiles. If I put it on, it complains about the "br"
> bareword. I'm using IndigoPerl.
May we see your little test program?
Cheers,
Rob
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