BCP_warmstart Class Reference
Warmstarting information for the LP solver. More...
#include <BCP_warmstart.hpp>
Public Member Functions | |
| virtual | ~BCP_warmstart () |
| The destructor is pure virtual. | |
| virtual CoinWarmStart * | convert_to_CoinWarmStart () const =0 |
| Return an OsiWarmStart object that can be fed to the LP engine. | |
| virtual BCP_storage_t | storage () const =0 |
| Return how the warmstarting info is stored. | |
| virtual void | update (const BCP_warmstart *const change)=0 |
| Update the current data with the one in the argument. | |
| virtual BCP_warmstart * | as_change (const BCP_warmstart *const old_ws, const BCP_vec< int > &del_vars, const BCP_vec< int > &del_cuts, const double petol, const double detol) const =0 |
Return a pointer to a warmstart info describing the currently stored data as a change with respect to that stored in old_ws. | |
| virtual BCP_warmstart * | clone () const =0 |
| Make a replica of the current warmstart information. | |
| virtual BCP_warmstart * | empty_wrt_this () const =0 |
| Create a warmstart info describing that no change should be done. | |
| virtual int | storage_size () const =0 |
| Return how much memory it'll take to pack this warmstart info. | |
Detailed Description
Warmstarting information for the LP solver.
A realization of the warmstarting information must done in a way that allows to keep the information either in an explicit way or as a change relative to another warmstarting information.
Definition at line 24 of file BCP_warmstart.hpp.
Constructor & Destructor Documentation
| virtual BCP_warmstart::~BCP_warmstart | ( | ) | [inline, virtual] |
The destructor is pure virtual.
(There are no data members here.)
Definition at line 27 of file BCP_warmstart.hpp.
Member Function Documentation
| virtual CoinWarmStart* BCP_warmstart::convert_to_CoinWarmStart | ( | ) | const [pure virtual] |
Return an OsiWarmStart object that can be fed to the LP engine.
Implemented in BCP_warmstart_basis, and BCP_warmstart_dual.
| virtual BCP_storage_t BCP_warmstart::storage | ( | ) | const [pure virtual] |
Return how the warmstarting info is stored.
Implemented in BCP_warmstart_basis, and BCP_warmstart_dual.
| virtual void BCP_warmstart::update | ( | const BCP_warmstart *const | change | ) | [pure virtual] |
Update the current data with the one in the argument.
If the argument is of explicit storage then just replace the current data. If it is relative and the current data is explicit then perform the update. Otherwise throw an exception.
| virtual BCP_warmstart* BCP_warmstart::as_change | ( | const BCP_warmstart *const | old_ws, | |
| const BCP_vec< int > & | del_vars, | |||
| const BCP_vec< int > & | del_cuts, | |||
| const double | petol, | |||
| const double | detol | |||
| ) | const [pure virtual] |
Return a pointer to a warmstart info describing the currently stored data as a change with respect to that stored in old_ws.
However, if the currently stored data is shorter to store than the change, then this method can return a copy of the current data! The current data must be explicitly stored and old_ws must be either explicit or can contain no data. Otherwise an exception must be thrown.
- Parameters:
-
old_ws the old warmstart info del_vars the indices of the variables that are deleted from the formulation old_wswas created fordel_cuts same for the cuts petol primal zero tolerance detol dual zero tolerance
| virtual BCP_warmstart* BCP_warmstart::clone | ( | ) | const [pure virtual] |
Make a replica of the current warmstart information.
Implemented in BCP_warmstart_basis, and BCP_warmstart_dual.
| virtual BCP_warmstart* BCP_warmstart::empty_wrt_this | ( | ) | const [pure virtual] |
Create a warmstart info describing that no change should be done.
This is really the task of a constructor, but BCP does not know the type of warmstart the user will use, so it will invoke this method for a warmstart that was created by the user. Tricky, isn't it?
Implemented in BCP_warmstart_basis, and BCP_warmstart_dual.
| virtual int BCP_warmstart::storage_size | ( | ) | const [pure virtual] |
Return how much memory it'll take to pack this warmstart info.
It is used when comparing which sort of storage is smaller.
Implemented in BCP_warmstart_basis, and BCP_warmstart_dual.
The documentation for this class was generated from the following file:
- /home/coin/svn-release/OptimizationSuite-1.1.0/Bcp/src/include/BCP_warmstart.hpp
