• Jean-Louis Leroy (11/11) Jun 26 2017 https://dlang.org/spec/abi.html states: The leftmost side of the

Jean-Louis Leroy <jl leroy.nyc> writes:

https://dlang.org/spec/abi.html states: The leftmost side of the 
inheritance graph of the interfaces all share their vptrs, this 
is the single inheritance model. Every time the inheritance graph 
forks (for multiple inheritance) a new vptr is created and stored 
in the class' instance.

Then: Every time a virtual method is overridden, a new vtbl[] 
must be created with the updated method pointers in it.

Since the first entry of the vtbl is a pointer to instance of 
TypeInfo, it seems to me that each class has its own vtbl[], 
distinct from all others, even if it does not add any virtual 
function.