8c9577ffe90319376fdd4265340220555f036ccb
http://www.sgi.com/tech/stl/EqualityComparable.html If a particular implementation of the stl isn't c++98 compliant, a global template<typename T> bool operator==( const vector<T> &a, const vector<T> &b) can be written (and operator!= of course).
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