problem with map class and forward class declaration

[Jeremy Dean]

The following test case fails to compile:
 
#include <map>
 
class A;  //forward class declaration
 
std::map<int, A> A_Map;
 
class A
{
    int a;
};
 
int main() { return 0; }
 
The following error occurs:
 
"./../../../include/rw/_pair.h", line 67: Error: The type "A" is incomplete.
"./../../../include/rw/_tree.h", line 98:     Where: While specializing
"std::pa
ir<const int, A>".
"./../../../include/rw/_tree.h", line 98:     Where: Specialized in
__rw::__rw_r
b_tree_node<std::allocator<std::pair<const int, A>>, std::pair<const int,
A>, in
t, __rw::__select1st<std::pair<const int, A>, int>>.
"./../../../include/rw/_tree.h", line 271:     Where: Specialized in
__rw::__rb_
tree<int, std::pair<const int, A>, __rw::__select1st<std::pair<const int,
A>, in
t>, std::less<int>, std::allocator<std::pair<const int, A>>>.
"./../../../include/map", line 98:     Where: Specialized in std::map<int,
A, st
d::less<int>, std::allocator<std::pair<const int, A>>>.
"../st1.cpp", line 5:     Where: Specialized in non-template code.
1 Error(s) detected.
*** Error code 1
make: Fatal error: Command failed for target `st1.o'
 
 
 
Jeremy Dean