On Solaris 11.3 I use latest Oracle Developer Studio with latest compilers.

Scenario:
- Create C/C++ Application project with main.cpp
- Open Project Properties window
- Set Build|C++ Compiler|C++ Standard = C++11
- Press OK button
- Open main.cpp file
- Add and Save such code:
#include <vector>

int main(int argc, char** argv) {
    std::vector<int> v;
    v.push_back(1);
    return 0;
}
- Call context menu and select "Code Assistance|Reparse Project" item
==> I see 2 unresolved identifiers 'vector' and 'push_back'

Workaround:
- Reopen file
- Rebuild project
- Modify and save file