# bdm::datalink_m2m Class Reference

`#include <bdmbase.h>`

List of all members.

## Public Member Functions
| datalink_m2m ()
| Constructor.
void | set_connection (const RV &rv, const RV &rvc, const RV &rv_up, const RV &rvc_up)
| Set connection between the vectors.
vec | get_cond (const vec &val_up, const vec &cond_up)
| Get cond for myself from val and cond of "Up".
void | set_connection (const RV &rv, const RV &rvc, const RV &rv_up)
| Set connection between vectors.
void | set_connection (const RV &rv, const RV &rv_up)
| set connection, rv must be fully present in rv_up
void | set_connection (int ds, int us, const ivec &upind)
| set connection using indices
vec | get_cond (const vec &val_up)
| Construct condition.
void | pushup_cond (vec &val_up, const vec &val, const vec &cond)
| Copy corresponding values to Up.condition.
vec | pushdown (const vec &val_up)
| Get val for myself from val of "Up".
void | pushup (vec &val_up, const vec &val)
| Fill val of "Up" by my pieces.
## Protected Attributes
ivec | c2c_up
| cond-to-cond link, indices of the upper cond
ivec | c2c_lo
| cond-to-cond link, indices of the local cond
int | condsize
| Remember how long cond should be.
ivec | v2c_up
| upper_val-to-local_cond link, indices of the upper val
ivec | v2c_lo
| upper_val-to-local_cond link, indices of the local cond
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

## Detailed Description

DataLink is a connection between mpdf and its superordinate (Up) This class links

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

- bdmbase.h