I'm having some trouble finding out how it is possible to conditionally compile code depending on which version of D is set.

This is from the spec about the version statement: "It is inevitable that the D language will evolve over time. Therefore, the version identifier namespace beginning with "D_" is reserved for identifiers indicating D language specification or new feature conformance."

There doesn't seem to be a v1 version identifier however, is this a bug or should it be filed as one?