* Enable extended alignment for complex types with a define

* Do not use reserved C identifiers

See https://wiki.sei.cmu.edu/confluence/display/c/DCL37-C.+Do+not+declare+or+define+a+reserved+identifier

* add a comment that this is undocumented

* Use numpy.prod (keep data type) for computing buffer size

* Add comment on computation of 'size'

* Check individual shape components

* Force computation on uint type

* Add check on each dimension datatype

* Add test_allocation_with_various_shape_scalar_types

* Fix flake8 issues

* Fix shape check

* Replace any() with np.any()

* Shape comp: comment phrasing, convert to array only once

Co-authored-by: Andreas Kloeckner <inform@tiker.net>

Co-authored-by: Isuru Fernando <isuruf@gmail.com>