Base-class for branchers. More...
#include <core.hpp>
Protected Member Functions | |
Brancher (Home home) | |
Constructor for creation. | |
Brancher (Space &home, Brancher &b) | |
Constructor for cloning b. | |
Brancher | |
virtual bool | status (const Space &home) const =0 |
Check status of brancher, return true if alternatives left. | |
virtual const Choice * | choice (Space &home)=0 |
Return choice. | |
virtual const Choice * | choice (const Space &home, Archive &e)=0 |
Return choice from e. | |
virtual ExecStatus | commit (Space &home, const Choice &c, unsigned int a)=0 |
Commit for choice c and alternative a. | |
virtual NGL * | ngl (Space &home, const Choice &c, unsigned int a) const |
Create no-good literal for choice c and alternative a. | |
virtual void | print (const Space &home, const Choice &c, unsigned int a, std::ostream &o) const |
Print branch for choice c and alternative a. | |
Id and group support | |
unsigned int | id (void) const |
Return brancher id. | |
BrancherGroup | group (void) const |
Return group brancher belongs to. | |
void | group (BrancherGroup g) |
Add brancher to group g. | |
Additional Inherited Members | |
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virtual Actor * | copy (Space &home)=0 |
Create copy. | |
virtual size_t | dispose (Space &home) |
Delete actor and return its size. | |
virtual | ~Actor (void) |
To avoid warnings. | |
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static void * | operator new (size_t s, Space &home) |
Allocate memory from space. | |
static void | operator delete (void *p, Space &home) |
No-op for exceptions. | |
static void * | operator new (size_t s) |
Not used. | |
static void | operator delete (void *p) |
Not used. | |
Base-class for branchers.
Note that branchers cannot be created inside a propagator (no idea why one would like to do that anyway). If you do that the system will explode in a truly interesting way.
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inlineprotected |
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pure virtual |
Check status of brancher, return true if alternatives left.
This method is called when Space::status is called, it determines whether to continue branching with this brancher or move on to the (possibly) next brancher.
Implemented in CDBF, Gecode::FlatZinc::AuxVarBrancher, Gecode::FlatZinc::IntBoolBrancherBase, Gecode::Gist::StopBrancher, Gecode::Kernel::FunctionBranch, Gecode::ViewBrancher< View, Filter, n >, Gecode::ViewBrancher< IntView, Filter, n >, QueenArmies::QueenBranch, Radiotherapy::NestedSearch, SteelMill::SteelMillBranch, and Warnsdorff.
Return choice.
Note that this method relies on the fact that it is called immediately after a previous call to status. Moreover, the member function can only be called once.
Implemented in CDBF, Gecode::FlatZinc::AuxVarBrancher, Gecode::FlatZinc::IntBoolBrancher< Merit >, Gecode::FlatZinc::IntBoolBrancherBase, Gecode::Gist::StopBrancher, Gecode::Int::Branch::ViewValuesBrancher< n, min, Filter, Print >, Gecode::Int::LDSB::LDSBBrancher< View, n, Val, a, Filter, Print >, Gecode::Kernel::FunctionBranch, Gecode::Set::LDSB::LDSBSetBrancher< View, n, Val, a, Filter, Print >, Gecode::ViewValBrancher< View, n, Val, a, Filter, Print >, QueenArmies::QueenBranch, Radiotherapy::NestedSearch, SteelMill::SteelMillBranch, and Warnsdorff.
Return choice from e.
Implemented in CDBF, Gecode::FlatZinc::AuxVarBrancher, Gecode::FlatZinc::IntBoolBrancherBase, Gecode::Gist::StopBrancher, Gecode::Int::Branch::ViewValuesBrancher< n, min, Filter, Print >, Gecode::Int::LDSB::LDSBBrancher< View, n, Val, a, Filter, Print >, Gecode::Kernel::FunctionBranch, Gecode::ViewValBrancher< View, n, Val, a, Filter, Print >, QueenArmies::QueenBranch, Radiotherapy::NestedSearch, SteelMill::SteelMillBranch, and Warnsdorff.
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pure virtual |
Commit for choice c and alternative a.
The current brancher in the space home performs a commit from the information provided by the choice c and the alternative a.
Implemented in CDBF, Gecode::FlatZinc::AuxVarBrancher, Gecode::FlatZinc::IntBoolBrancherBase, Gecode::Gist::StopBrancher, Gecode::Int::Branch::ViewValuesBrancher< n, min, Filter, Print >, Gecode::Int::LDSB::LDSBBrancher< View, n, Val, a, Filter, Print >, Gecode::Kernel::FunctionBranch, Gecode::Set::LDSB::LDSBSetBrancher< View, n, Val, a, Filter, Print >, Gecode::ViewValBrancher< View, n, Val, a, Filter, Print >, QueenArmies::QueenBranch, Radiotherapy::NestedSearch, SteelMill::SteelMillBranch, and Warnsdorff.
Create no-good literal for choice c and alternative a.
The current brancher in the space home creates a no-good literal from the information provided by the choice c and the alternative a. The brancher has the following options:
Reimplemented in Gecode::FlatZinc::IntBoolBrancherBase, Gecode::Int::Branch::ViewValuesBrancher< n, min, Filter, Print >, and Gecode::ViewValBrancher< View, n, Val, a, Filter, Print >.
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virtual |
Print branch for choice c and alternative a.
Prints an explanation of the alternative a of choice c on the stream o.
Reimplemented in CDBF, Gecode::FlatZinc::AuxVarBrancher, Gecode::FlatZinc::IntBoolBrancherBase, Gecode::Gist::StopBrancher, Gecode::Int::Branch::ViewValuesBrancher< n, min, Filter, Print >, Gecode::Kernel::FunctionBranch, Gecode::ViewValBrancher< View, n, Val, a, Filter, Print >, QueenArmies::QueenBranch, Radiotherapy::NestedSearch, SteelMill::SteelMillBranch, and Warnsdorff.
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inline |
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inline |