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

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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.
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