typedef inheritance from a pure abstract base

Question

Edit: Found duplicate

I\'ve whittled down some problem code to the simplest working case to illustrate the following: my typedef in a pure abstract base class is not b

Answer 1

you should do

typedef typename TemplateMethod<X>::system_t system_t;

to "inherit" typedef. typedef is not automatically inherited (if compiler is compliant).

if you look through stack overflow, there will be duplicate of this question somewhere.