[Wavepacket-ng-devel] chat summary 19-Nov-2014

[Ulf L. <ul...@wa...>]

Hi,

today I had a chat with Andreas, a new developer, and to revive the
habit of sending a summary of what is going on, I am sending this mail.

The task is #49 (unifying propagators), and was focused on making the
OperatorMatrix more accessible. Basic decisions:

* OperatorMatrix gets a new constructor that takes a single operator
  and sets up a 1x1 matrix with this operator (to handle the trivial
  case)
    - invalid_argument exception if the operator is null
* OperatorMatrix gets a new constructor that takes a vector of vectors
  of operators (rows in the matrix), and sets up the operator
    - invalid_argument exception if all operators null
    - invalid_argument exception if matrix not quadratic
    - invalid_argument exception if wrong number of operators in a row
* add a new static variable that represents a null operator (null
  pointer); supplying this operator in the second constructor signals
  that this cell of the matrix is the zero operator.
* add a function getSize() to return the size of the OperatorMatrix
* add a function getOperator(uint row, uint column) that returns the
  appropriate operator in this cell of the matrix
    - invalid_argument exception if the row or column is out of range