Question

I am trying to understand a C++ code that reads a dll explicitly.
Does any one know how the line #define LFE_API(name) LFE_##name name below actually works?
I understand #define LFE_API(name) LFE_##name but get confused about the last “name”.

    struct Interface
{
    #   ifdef LFE_API
    #       error You can't define LFE_API before. 
    #   else
    #       define LFE_API(name) LFE_##name name
                LFE_API(Init);
                LFE_API(Close);
                LFE_API(GetProperty);
    #       undef LFE_API
    #   endif
};

Answer 1

Since the first part of the macro (LFE_##name) just concatenates both parts, a call to LFE_API is creating a variable named name with the type LFE##name, such as:

LFE_API(Init) expands to LFE_Init Init;