This is probably trivial or impossible Code Introspection...

[H. S. Teoh via Digitalmars-d-learn]

On Sun, Sep 20, 2015 at 05:21:03AM +0000, WhatMeWorry via Digitalmars-d-learn wrote:
[...]
> Thanks.  But now I have an even more fundamental problem.  I keep
> getting a FieldNameTuple is not defined.  But I've clearly got the
> import statement.  I even copied the example from Phobos verbatim:
> 
> import std.traits;
> 
> struct S { int x; float y; }
> static assert(FieldNameTuple!S == TypeTuple!("x", "y"));

You need to use is(...) when comparing types:

	static assert(is(FieldNameTuple!S == TypeTuple!("x", "y")));

HTH,


--T