Re^2: Calling module function from within a blessed module


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Re^2: Calling module function from within a blessed module

by Bod (Parson)

on Jan 03, 2021 at 11:57 UTC ( [id://11126193]=note: print w/replies, xml )

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in reply to Re: Calling module function from within a blessed module
in thread Calling module function from within a blessed module

Never, ever, ever do this. The one argument version of bless really should issue a warning.

Actually, in real code I do not generally use the one argument version. I created that as a minimal example to support the question.

Having said that, I don't know why I avoid the single argument version. It is because I have copied other code that works and looks like the author knows what they are doing which is not exactly the most rigorous methodology for learning...

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Re^3: Calling module function from within a blessed module
by dsheroh (Monsignor) on Jan 03, 2021 at 12:45 UTC

bless

If you have two classes, Parent and Child, and Parent uses bless {}, $_[0];, then Child can simply inherit Parent's new (or other constructor) and Child->new() will Just Work^TM.

If Parent uses one-argument bless, then it will always create a Parent object, and Child will have to override the constructor (either writing a completely new constructor, or calling Parent's constructor and re-blessing the result before returning it).

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