On Monday, 30 January 2012 at 13:23:19 UTC, Manu wrote:

Is D capable of accessing the filesystem at compile time, for instance, to
load and parse an XML DOM, or some other structural metadata, which may be
used to generate the associative struct and its members?
I can think of many other uses for the technology too. It seems extremely
powerful, and I'm sure it's been discussed :)

That's what the import("filename") expression is for:
http://dlang.org/expression.html#ImportExpression

You'll need to approve paths for inclusion with the -J switch.