What’s wrong with this definition when using a pre-C++11 compiler?

std::vector<std::vector<int>> thematrix;

• There’s nothing wrong with it.
• An std::vector cannot contain more std::vector containers as its elements.
• The correct syntax should be: std::vector[std::vector[int]] thematrix;
• >> is parsed as the shift-right operator, and thus results in a compile error.