Getting all struct members and values with introspection avoiding string mixins

[mw]

On Sunday, 1 May 2016 at 10:13:47 UTC, H. S. Teoh wrote:
>
> Using typeof(T.tupleof) seems a bit circuitous. Here's how I'd 
> do it:
>
> 	void printStructInfo( T )( T info ) {
> 		import std.stdio : writefln;
> 		foreach (memb; __traits(allMembers, T)) {
> 			writefln("%s: %s", memb,
> 				__traits(getMember, info, memb));
> 		}
> 	}
>
> (For structs that have members other than data fields, you'll 
> need a static if to filter out non-value members, but this 
> should get you started.)

How to check `isAlias`? e.g.

```
struct foo {
   int bar;
   alias bar baz;
}
```

I want to filter out baz (right now, it's included).