# bdm::datalink Class Reference

DataLink is a connection between two data vectors Up and Down. More...

## Detailed Description

DataLink is a connection between two data vectors Up and Down.

Up can be longer than Down. Down must be fully present in Up (TODO optional) See chart:

`#include <bdmbase.h>`

List of all members.

## Public Member Functions
| datalink ()
| Constructor.
| datalink (const RV &rv, const RV &rv_up)
| Convenience constructor.
virtual void | set_connection (const RV &rv, const RV &rv_up)
| set connection, rv must be fully present in rv_up
virtual void | set_connection (int ds, int us, const ivec &upind)
| set connection using indices
vec | pushdown (const vec &val_up)
| Get val for myself from val of "Up".
virtual void | filldown (const vec &val_up, vec &val_down)
| Get val for vector val_down from val of "Up".
virtual void | pushup (vec &val_up, const vec &val)
| Fill val of "Up" by my pieces.
int | _upsize ()
| access functions
int | _downsize ()
| access functions
## Protected Attributes
int | downsize
| Remember how long val should be.
int | upsize
| Remember how long val of "Up" should be.
ivec | v2v_up
| val-to-val link, indices of the upper val

The documentation for this class was generated from the following files:

- bdmbase.h
- bdmbase.cpp