Re^3: undef/defined &{$name} while "strict refs"

[Anonymous Monk]

I think, however, it's still unclear why defined/undef &{ 'run' } doesn't throw exceptions while "strict refs". ,/i>

Have you read what strict says about refs?

Please read it now

[anazawa]

The POD says we are allowed to get a reference to CODE using symbolic references while "strict refs". I think this doesn't mean we can defined or undef subroutines as well. I may be misreading the document.

[Anonymous Monk]

I think this doesn't mean we can defined or undef subroutines as well.

I don't understand what you're saying here

[anazawa]

When we execute my code above, the script throws an exception because &{ 'run' } violates "strict refs". Khen1950fx explained how to avoid this problem (I appreciate his suggestion).

On the other hand, when we comment out &{ 'run' }, my script doesn't output error messages. This result shows the following doesn't violate "strict refs":

my $walkable = defined &{ 'walk' };
undef &{ 'walk' };

It seems each line uses symbolic references. I don't understand why this is possible.