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Re: Porting a C/C++ Structure to Perl

by tobyink (Abbot)
on Jan 17, 2013 at 20:18 UTC ( #1013879=note: print w/replies, xml ) Need Help??

in reply to Porting a C/C++ Structure to Perl

It can be done that way. The trouble is that hashes don't offer any validation. You could mis-spell it as $data{vaule} somewhere leading to errors which can be hard to detect.

An object would be more appropriate. $data->vaule will throw an exception if the vaule method does not exist.

Creating full classes for each struct you need may seem like a lot of work, but there are various CPAN modules to make it easier for you, such as Class::Struct and MooseX::Struct. Here's an example using MooX::Struct (which I am the author of):

use MooX::Struct Point => [ 'x', 'y' ], Point3D => [ -extends => ['Point'], 'z' ], ; my $origin = Point3D[ 0, 0, 0 ];

PS: if you do wish to continue the hash route, check out Hash::Util's lock_keys function which can be used to restrict which keys a hash can take, reducing the risks of typos.

perl -E'sub Monkey::do{say$_,for@_,do{($monkey=[caller(0)]->[3])=~s{::}{ }and$monkey}}"Monkey say"->Monkey::do'

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[perldigious]: A question since I'm ignorant of what's normal for database management... Do admins change column names a lot in databases?
[perldigious]: On occasion my scripts break, because they will do something that seems laregly pointless to me... like in this case, changing a column name from "ABC Category" to "ABC Category Override".
[perldigious]: Being the ignorant one, my initial reaction to that is, "that's sort of a dick move, a lot of people like me expect column names like that to stay the same, why the hell would you change them like that for seemingly no good reason?"
[perldigious]: Or is my irritation/ frustration well founded?

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