std::tr1::array compile error

Question

C++ requires a type specifier for all declarations
  ...char, 16>>, MAXPreBorder> _preCloselist)

my code is:

std::tr1::unordered_set<std::tr1::array<unsigned char, 16> >
  dfs(Graphnode _root,
      std::tr1::array<unsigned char, 16> goal,
      unsigned char _totalDepth,
      queue<Graphnode> _preload1,
      queue<Graphnode> _preload2,
      std::tr1::array<
        std::tr1::unordered_set<std::tr1::array<unsigned char, 16>>, 
        MAXPreBorder> _preCloselist
     )

so the problem is this:

std::tr1::array<
  std::tr1::unordered_set<std::tr1::array<unsigned char, 16>>, 
  MAXPreBorder> _preCloselist

Any idea it is wrong?

many thanks!

Answer 1

It could be that your compiler doesn't like the >> in

std::tr1::unordered_set<std::tr1::array<unsigned char, 16>>

This is only guaranteed to work in C++11. Try

std::tr1::unordered_set<std::tr1::array<unsigned char, 16> >