v1: aggregate_options (CXX-3237, CXX-3238) (#1533)

Author: eramongodb

src/mongocxx/include/mongocxx/v1/aggregate_options.hpp

@@ -217,6 +217,8 @@ class aggregate_options {
     /// Return the current "comment" field.
     ///
     MONGOCXX_ABI_EXPORT_CDECL(bsoncxx::v1::stdx::optional<bsoncxx::v1::types::view>) comment() const;
+
+    class internal;
 };
 
 } // namespace v1

src/mongocxx/include/mongocxx/v_noabi/mongocxx/options/aggregate-fwd.hpp

@@ -14,6 +14,8 @@
 
 #pragma once
 
+#include <mongocxx/v1/aggregate_options-fwd.hpp> // IWYU pragma: export
+
 #include <mongocxx/config/prelude.hpp>
 
 namespace mongocxx {
@@ -29,7 +31,7 @@ class aggregate;
 namespace mongocxx {
 namespace options {
 
-using ::mongocxx::v_noabi::options::aggregate;
+using v_noabi::options::aggregate;
 
 } // namespace options
 } // namespace mongocxx
@@ -40,3 +42,6 @@ using ::mongocxx::v_noabi::options::aggregate;
 /// @file
 /// Declares @ref mongocxx::v_noabi::options::aggregate.
 ///
+/// @par Includes
+/// - @ref mongocxx/v1/aggregate_options-fwd.hpp
+///