https://issues.dlang.org/show_bug.cgi?id=19615
--- Comment #2 from Bolpat <[email protected]> --- In the case of classes, this works. For structs, it does not. If not alias member = field.member; or alias member = Test1.member; in Test2, what kind of alias do you think of? I know none. Both don't work. And for the second example, this is not even slightly possible. The built-in index operator for alias sequences cannot be rebuilt by means of the language, i.e. opIndex with statically known argument. The spec [1] is very vague about alias this, when it works etc. Technically, by the spec, alias this to a built-in type field need not work: It only includes structs, classes, and property member function with no parameters. It does not mention alias sequences at all! One could even argue that it is a bug that alias this to an alias sequence even works. [1]: https://dlang.org/spec/class.html#AliasThis --
