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@7of9

c++/stl > STLコンテナクラスは仮想デストラクタを提供していない > このクラスから継承してはいけない

引用: C++のためのAPIデザイン by マーティン・レディ
12.2 継承による拡張

だが、すでに述べたとおり、仮想デストラクタを定義するクラスからのみ派生すべきだ。STLコンテナクラスは仮想デストラクタを提供していない。実際、オーバーライドする仮想メソッドはまったくない。つまり、このクラスから継承してはいけないことを明示しているのだ。

関連して
http://stackoverflow.com/questions/1647298/why-dont-stl-containers-have-virtual-destructors

I think Stroustrup answered this question indirectly in his fantastic paper: Why C++ is not just an ObjectOriented Programming Language:
...
A virtual destructor is only useful for inheritance scenarios. STL containers are not designed to be inherited from (nor is it a supported scenario). Hence they don't have virtual destructors.

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