Re^4: Check if module is installed


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Re^4: Check if module is installed

by JavaFan (Canon)

on Nov 16, 2009 at 11:46 UTC ( [id://807420]=note: print w/replies, xml )

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in reply to Re^3: Check if module is installed
in thread Check if module is installed

Checking $@ is not an appropriate way to check if an eval failed. An eval can fail, but in the clean up (DESTROY for instance), something can unset $@.

The only way to make sure an eval succeeded is to check its return value:

eval "use Some::Module 94.5; 1" or do {
    printf "Loading Some::Module failed: %s", $@ // "Unknown error";
    ...
};
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Re^5: Check if module is installed by DrHyde (Prior) on Nov 17, 2009 at 10:36 UTC
Can you give an example that would make my code Do The Wrong Thing? Cos I can't think of any way of doing that.	[reply]

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