Re: [Boost-users] Boost Bimap Question

10 May 2008

      AMDG

Niels Dekker - mail address until 2008-12-31 wrote:
...
First of all, your MyClass forward declaration should end with a
semicolon (;), of course! Still, you're saying that the forward
declaration would be sufficient when you declare an instance of a
container from the Standard C++ Library, right?  So would the following
compile on your platform?
//----------------------------
  #include <map>
  #include <string>
  using std::string ;
class MyClass ;
  std::map<string, MyClass> my_map ;
int main() { return 0 ; }
  //----------------------------
It doesn't compile on my platform.  I also tried www.dinkumware.com/exam
and www.comeaucomputing.com/tryitout
That can't possible compile.  It is possible that

#include <map>
#include <string>
using std::string ;

class MyClass ;
extern std::map<string, MyClass> my_map ;

class MyClass {};
std::map<string, MyClass> my_map ;

int main() { return 0 ; }

would compile.  I don't think it's technically legal though.

In Christ,
Steven Watanabe