Re^2: Function name in a variable, can't recall the concept

It's technically the dereference of a symbolic reference that's not allowed. However, there is a (documented) exception:

\&$sub_name
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This means that while

$sub_name->()
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isn't allowed,

(\&$sub_name)->()
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is allowed.

($invocant->$method_name() is also allowed under strict.)

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Re^3: Function name in a variable, can't recall the concept by Eily (Monsignor) on Apr 03, 2019 at 08:18 UTC
It's technically the dereference of a symbolic reference that's not allowed. Is there another case where you would call a variable a symbolic reference when it's not being dereferenced? With eval or when accessing a value through the symbols table? You're right about those two exceptions, at least the exceptions are complex enough that beginners shouldn't use them by accident.	[reply]
Re^3: Function name in a variable, can't recall the concept by LanX (Saint) on Apr 14, 2019 at 13:50 UTC
> However, there is an exception: More there are: `use strict; use warnings; sub tst { warn "tst($_[0]) called\n" } my $symbol="tst"; ($::{$symbol})->(1); &{$::{$symbol}}(2); (main->can($symbol))->(3); &{main->can($symbol)}(4);` [download] `C:/Perl_524/bin\perl.exe d:/exp/symbolic_references.pl tst(1) called tst(2) called tst(3) called tst(4) called` [download] NB: `$::{...}` is a shortcut for STASH lookup `$main::{...}` and returns a type-glob `->can(...)` returns a coderef Cheers Rolf _{(addicted to the Perl Programming Language :) Wikisyntax for the Monastery FootballPerl is like chess, only without the dice}	[reply] [d/l] [select]
Re^4: Function name in a variable, can't recall the concept by ikegami (Patriarch) on Apr 15, 2019 at 00:54 UTC
Those aren't really exceptions. Strict refs is only meant to stop you from accidentally using symbolic refs. (After all, you can always turn it off strict refs off if you want to use symbolic refs intentionally.) `%::` and `can` only take symbol names, so they can't accidentally be used incorrectly.	[reply] [d/l] [select]
Re^5: Function name in a variable, can't recall the concept by LanX (Saint) on Apr 15, 2019 at 11:25 UTC
> Those aren't really exceptions. I was referring to "allowed under strict" requirement. Cheers Rolf _{(addicted to the Perl Programming Language :) Wikisyntax for the Monastery FootballPerl is like chess, only without the dice}	[reply]
Re^6: Function name in a variable, can't recall the concept by ikegami (Patriarch) on Apr 16, 2019 at 19:14 UTC


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