The parser doesn't allow
cdef void foo(np.ndarray[float] X):
pass
This is because the parser has to support
cdef void foo(int[] X)
and at the point of parsing the [ it isn't known whether is is a definition or declaration (right?)
One could for instance parse to the end of the line and check for a ":" when encountering the [ in a cdef (and store info to coordinate this in the parsing context) -- as the two cases can be seperated on whether it is a definition or not.
Another option is to use a "TrailingBracketTypeNode?" rather than let the parser resolve it.
