Re^15: Try::Tiny and -E (False Negative)

> False negative:

As I already said:

In this case feature "try" would need to warn about the subs in the caller's stash.

But that's also a convoluted edge case.

If one really needed to activate both Try::Tiny and feature try inside the same file - let's say while gradually refactoring legacy code - and wouldn't want to see the warning, it would be acceptable to require from the author to deactivate the warning class ( no warnings "shadow" or "mask" or whatever)

Cheers Rolf
_{(addicted to the Perl Programming Language :)

see Wikisyntax for the Monastery}

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Re^16: Try::Tiny and -E (False Negative) by ikegami (Patriarch) on Jan 03, 2026 at 16:52 UTC
In this case feature "try" would need to warn about the subs in the caller's stash. Doing it at run-time won't work. We're trying to issue the warning before the compilation error.	[reply]
Re^17: Try::Tiny and -E (False Negative) by LanX (Saint) on Jan 06, 2026 at 21:20 UTC
> Doing it at run-time won't work And I'm talking about compile time: Pragmas like `use feature` have the same import-timing like modules and all subs are declared at compile time. Cheers Rolf _{(addicted to the Perl Programming Language :) see Wikisyntax for the Monastery}	[reply] [d/l]
Re^18: Try::Tiny and -E (False Negative) by ikegami (Patriarch) on Jan 07, 2026 at 15:20 UTC
Ah, you were talking about patching feature.pm. Yes, that (or something like that) would work. That's in line with what I said about it not being Try::Tiny's issue to resolve. Also, having feature.pm (or `perlcritic`) handle it would help with all non-builtin implementations of `try` (not just Try::Tiny's).	[reply] [d/l] [select]
Re^19: Try::Tiny and -E (False Negative) by LanX (Saint) on Jan 07, 2026 at 17:38 UTC
Re^20: Try::Tiny and -E (False Negative) by ikegami (Patriarch) on Jan 08, 2026 at 16:33 UTC
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Re^18: Try::Tiny and -E (False Negative) by LanX (Saint) on Jan 07, 2026 at 01:49 UTC
DEMO: `use strict; use warnings; # selfcontained simulation of feature pragma package my_feature; use Carp; sub import { my $pkg = (caller)[0]; if ( grep {$_ eq "try"} @_ ) { for my $func (qw/try catch finally/) { carp "Warning: ${pkg}::$func() will be shadowed by feature 'tr +y'" if exists &{"${pkg}::$func"}; } } } 1; BEGIN { $INC{"my_feature.pm"} = "DEMO from " . __FILE__ } # end simulation package Foo; use Try::Tiny; use my_feature "try";` [download] --> `perl /home/lanx/perl/pm/check_stash_sub.pl Warning: Foo::try() will be shadowed by feature 'try' at /home/lanx/pe +rl/pm/check_stash_sub.pl line 23. Warning: Foo::catch() will be shadowed by feature 'try' at /home/lanx/ +perl/pm/check_stash_sub.pl line 23. Warning: Foo::finally() will be shadowed by feature 'try' at /home/lan +x/perl/pm/check_stash_sub.pl line 23.` [download] NB: The warnings are emitted before any code following the use feature is compiled. Cheers Rolf _{(addicted to the Perl Programming Language :) see Wikisyntax for the Monastery}	[reply] [d/l] [select]