Problem with composite bases with more than two components spotted.
When constructing a composite basis with more than two components, a compiler error is spotted. A simplified test case is added for demonstration. For invoking the compiler error, uncomment line 46 of dune/functions/functionspacebases/test/compositebasistest.cc, enabling the construction of a P1 x P1 x P1 basis on a quadrilateral grid.
According to the implementation of composite bases, this is not meant to happen. A static assert within the class DefaultGlobalBasis failed.
No fix is presented.