Re^3: warnings pragma anomaly

As the return value of this expression is returned and checked for truthness, it's not used in a void context.

Are you sure about that? If you end a package with just: 1; no warning is produced; but if you end it with just: 42;:

C:\test>perl -Mstrict -w
package x;

sub f{ 1 }

42;
^Z
Useless use of a constant in void context at - line 5.
[download]

Although it is returned and checked at runtime; at the point of parsing it is in a void context.

And you can't avoid that by prefixing a return statement either:

C:\test>perl -Mstrict -w
package x;
sub f{ 1 }
return 42;
^Z
Can't return outside a subroutine at - line 3.
[download]

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Re^4: warnings pragma anomaly by choroba (Cardinal) on Oct 19, 2015 at 22:25 UTC
I usually don't run modules, I use them. No warning is produced in such situations. لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ	[reply]
Re^5: warnings pragma anomaly by muba (Priest) on Oct 19, 2015 at 23:22 UTC
True. But before we even start talking about unit tests, it would be nice to have `perl -wc Foo.pm` [download] at least come up with the "Foo.pm syntax ok" message and without raising any warnings. Given `package Foo; 42;` [download] this would give "syntax ok" but also the "useless use of constant in void context" warning, whereas `package Foo; 1;` [download] would only give the "syntax ok" message.	[reply] [d/l] [select]
Re^6: warnings pragma anomaly by choroba (Cardinal) on Oct 20, 2015 at 07:45 UTC
You can still do `perl -MFoo -wce1` [download] لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ	[reply] [d/l]
Re^5: warnings pragma anomaly by BrowserUk (Patriarch) on Oct 19, 2015 at 22:40 UTC
Good point :)	[reply]