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Re: Template problem [message #14323 is a reply to message #14320]

Fri, 22 February 2008 14:58

bytefield
Messages: 210
Registered: December 2007

Experienced Member

waxblood wrote on Fri, 22 February 2008 15:32

I remember Mirek once said somewhere in the forum that inheriting classes from upp containers is discouraged, as it is with STL... . Maybe problems arise just because STL is not designed to do such operations, but I can't tell more.

David

Yeah i know it's not a good behavior but in that case(it was an example from Bjarne C++ programming book) std::vector doesn't raise any exception if you use [] operator over the vector limits and it could result in segmentation fault. So a solution to this problem is to inherit from vector and in new [] operator use return vector::at(i) which raise an exception if i is out of vector limits(see first example).

Sometimes is useful to inherit from containers[ex. if you want to make some gui stuff(ex. sizers) and cannot keep container as member].

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