#2933: CarpetX's reduction.hxx is not self-contained

Reporter: Roland Haas Status: new Milestone: Version: Type: bug Priority: major Component: CarpetX

using just `USES INCLUDE HEADER reduction.hxx` in interface.ccl and then:

``` #include "reduction.hxx"

```

I get an error message:

``` /home/rhaas/postdoc/gr/cactus/ET_trunk/arrangements/CarpetX/CarpetX/src/reduction.hxx:24:22: error: ‘amrex’ does not name a type [-Wtemplate-body] 24 | using tuple_type = amrex::GpuTuple<T, T, T, T, T, T, T, T>; ```

-- Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2933/carpetxs-reduction...