Re^3: Perl try { } catch(e) { }

"Aaaaahh I think I understood ..."

I don't (for the moment) - but i don't care about and just do:

#!/usr/bin/env perl

use strict;
use warnings;
use Try::Tiny;

try {
    die qq(Goodbye World!);
}
catch {
    warn $_;
};

__END__
[download]

Best regards, Karl

ŤThe Crux of the Biscuit is the Apostropheť

Comment on Re^3: Perl try { } catch(e) { } Download Code

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Re^4: Perl try { } catch(e) { } by jdeguest (Beadle) on Mar 24, 2021 at 03:29 UTC
There is a full implementation of try-catch block using perl filters: Nice::Try So you can do something like embedded try-catch block, return, variable assignments, catching class exception, etc. There is no need for semicolon on the lack brace. `use Nice::Try; try { # do something die( "Argh...\n" ); } catch( $wow ) { return( $self->error( "Caught an error: $wow" ) ); } finally { # do some cleanup }` [download] Full disclosure: I am the author of this module that I created when Devel::Declare on which TryCatch was relying became obsolete.	[reply] [d/l]
Re^5: Perl try { } catch(e) { } by haukex (Archbishop) on Mar 24, 2021 at 08:51 UTC
There is a full implementation of try-catch block using perl filters Source filters are unfortunately quite dangerous, they are very prone to making code extremely brittle (Update: for example, Switch was removed from the Perl core for that reason, see e.g. Perl Code Changes Behavior if Two Subroutine definitions are swapped). Note that there is currently development underway to add try/catch to Perl natively - see Adding a try/catch syntax to Perl and Progress on try/catch.	[reply]
Re^6: Perl try { } catch(e) { } by jdeguest (Beadle) on Jun 17, 2021 at 02:47 UTC
they are very prone to making code extremely brittle Yes, it is true, but it largely depends on what the change are and how they are made. In the case of Nice::Try, the changes are carefully implemented and minimal and the module relies on PPI, which is way much safer than using regular expression. Anyway, try it, and you will see it is quite stable, but if you have any suggestion for improvement, I would very much welcome it.	[reply]
Re^7: Perl try { } catch(e) { } by haukex (Archbishop) on Jun 17, 2021 at 08:57 UTC
Re^8: Perl try { } catch(e) { } by jdeguest (Beadle) on Jun 18, 2021 at 11:53 UTC
Re^7: Perl try { } catch(e) { } by Haarg (Priest) on Jun 18, 2021 at 04:10 UTC
Re^8: Perl try { } catch(e) { } by jdeguest (Beadle) on Jun 18, 2021 at 11:31 UTC
Re^4: Perl try { } catch(e) { } by karlgoethebier (Abbot) on Mar 24, 2021 at 21:44 UTC
See also ŤThe Crux of the Biscuit is the Apostropheť	[reply]