The beta works great this far, just sharing some few initial
surprises.
1) The lookup rules for namespaces seem overly permissive:
extern (C++, A.B.C):
void cpp() { }
All these work:
A.cpp
B.cpp
C.cpp
A.B.cpp
B.C.cpp
A.B.C.cpp
2) We have std.traits.functionLinkage, but no corresponding trait
to get the namespace?