Better use forward declarations and export symbols

include/boost/container/pmr/global_resource.hpp

@@ -18,6 +18,7 @@
 #include <boost/container/detail/config_begin.hpp>
 #include <boost/container/detail/workaround.hpp>
 #include <boost/container/detail/auto_link.hpp>
+#include <boost/container/container_fwd.hpp>
 
 #include <cstddef>
 
@@ -25,10 +26,6 @@ namespace boost {
 namespace container {
 namespace pmr {
 
-/// @cond
-class memory_resource;
-/// @endcond
-
 //! <b>Returns</b>: A pointer to a static-duration object of a type derived from
 //!   memory_resource that can serve as a resource for allocating memory using
 //!   global `operator new` and global `operator delete`. The same value is returned every time this function

include/boost/container/pmr/memory_resource.hpp

@@ -17,6 +17,7 @@
 
 #include <boost/container/detail/config_begin.hpp>
 #include <boost/container/detail/workaround.hpp>
+#include <boost/container/container_fwd.hpp>
 #include <boost/move/detail/type_traits.hpp>
 #include <cstddef>
 
@@ -26,7 +27,7 @@ namespace pmr {
 
 //! The memory_resource class is an abstract interface to an
 //! unbounded set of classes encapsulating memory resources.
-class memory_resource
+class BOOST_CONTAINER_DECL memory_resource
 {
    public:
    // For exposition only

include/boost/container/pmr/monotonic_buffer_resource.hpp

@@ -18,6 +18,7 @@
 #include <boost/container/detail/config_begin.hpp>
 #include <boost/container/detail/workaround.hpp>
 #include <boost/container/detail/auto_link.hpp>
+#include <boost/container/container_fwd.hpp>
 #include <boost/container/pmr/memory_resource.hpp>
 #include <boost/container/detail/block_slist.hpp>
 

src/global_resource.cpp

@@ -10,7 +10,7 @@
 
 #define BOOST_CONTAINER_SOURCE
 #include <boost/container/pmr/memory_resource.hpp>
-
+#include <boost/container/pmr/global_resource.hpp>
 #include <boost/core/no_exceptions_support.hpp>
 #include <boost/container/throw_exception.hpp>
 #include <boost/container/detail/dlmalloc.hpp>  //For global lock

test/global_resource_test.cpp

@@ -60,7 +60,6 @@ void operator delete[](void *p) BOOST_CONTAINER_DELETE_EXCEPTION_SPECIFIER
 #pragma warning (pop)
 #endif
 
-#define BOOST_CONTAINER_ASAN
 #ifndef BOOST_CONTAINER_ASAN
 
 void test_new_delete_resource()