std::tr1::array编译错误

Question

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

我的代码是：

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
     )

所以问题是：

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

你知道这是错的吗？

非常感谢！

Answer 1

这可能是因为您的编译器不喜欢

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

这只保证在C++11中有效。

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