Cannot refer to a template name nested in a template parameter
c++
Solution
typedef typename Provider::template Data<int> D;
The problem is that, when the compilers parses `use()` for the first time, it doesn't know `Provider`, so it doesn't know what `Provider::Data` refers to. It could be a static data member, the name of a member function or something else. That's why you have to put the `typename` in. The additional `template` is necessary whenever the nested name is the name of a template. If it was something else, then `Data < ...` could be a comparison.
Problem
I have the following code: ``` template <typename Provider> inline void use() { typedef Provider::Data<int> D; } ``` Where I'm basically trying to use a template class member 'Data' of some 'Provider' class, applied to 'int', but I get the following errors: ``` util.cpp:5: error: expected init-declarator before '<' token util.cpp:5: error: expected `,' or `;' before '<' token ``` I'm using GCC 4.3.3 on a Solaris System.