Clingo::Observer Class Reference

Observer interface to inspect the current ground program. More...

#include <observe.hh>

Public Member Functions
	Observer ()=default
	The default constructor.
	Observer (Observer &&other)=delete
	Disable move and copy operations.
virtual	~Observer ()=default
	The default destructor.
void	init_program (bool incremental)
	Callback for the beginning of the program.
void	begin_step ()
	Callback for the beginning of a step.
void	end_step (Base base)
	Callback for the end of a step.
void	rule (ProgramAtomSpan head, ProgramLiteralSpan body, bool choice)
	Callback for a rule.
void	weight_rule (ProgramAtomSpan head, Weight lower, WeightedLiteralSpan body, bool choice)
	Callback for a weight rule.
void	minimize (WeightedLiteralSpan literals, Weight priority)
	Callback for a minimize constraint.
void	project (ProgramAtomSpan atoms)
	Callback for a projection directive.
void	external (ProgramAtom atom, ExternalType type)
	Callback for an external statement.
void	assume (ProgramLiteralSpan literals)
	Callback for an assumption directive.
void	heuristic (ProgramAtom atom, HeuristicType type, int bias, unsigned priority, ProgramLiteralSpan condition)
void	edge (int node_u, int node_v, ProgramLiteralSpan condition)
	Callback for an edge statement.

Friends
class	Control

Detailed Description

Observer interface to inspect the current ground program.

Member Function Documentation

assume()

void Clingo::Observer::assume ( ProgramLiteralSpan  literals )

inline

Callback for an assumption directive.

Parameters

literals

the literals to assume

edge()

void Clingo::Observer::edge ( int  node_u, int  node_v, ProgramLiteralSpan  condition  )

inline

Callback for an edge statement.

Parameters

node_u	the first node of the edge
node_v	the second node of the edge
condition	the condition under which the edge is active

external()

void Clingo::Observer::external ( ProgramAtom  atom, ExternalType  type  )

inline

Callback for an external statement.

Parameters

atom	the external atom
type	the type of the external statement

heuristic()

void Clingo::Observer::heuristic ( ProgramAtom  atom, HeuristicType  type, int  bias, unsigned  priority, ProgramLiteralSpan  condition  )

inline

Parameters

atom	the atom to apply the heuristic to
type	the type of the heuristic modification
bias	the bias of the heuristic modification
priority	the priority of the heuristic modification
condition	the condition when to apply the heuristic modification

init_program()

void Clingo::Observer::init_program ( bool  incremental )

inline

Callback for the beginning of the program.

Parameters

incremental

whether the program is incremental

minimize()

void Clingo::Observer::minimize ( WeightedLiteralSpan  literals, Weight  priority  )

inline

Callback for a minimize constraint.

Parameters

literals	the weighted literals to minimize
priority	the priority of the minimize constraint

project()

void Clingo::Observer::project ( ProgramAtomSpan  atoms )

inline

Callback for a projection directive.

Parameters

atoms

the atoms to project on

rule()

void Clingo::Observer::rule ( ProgramAtomSpan  head, ProgramLiteralSpan  body, bool  choice  )

inline

Callback for a rule.

Parameters

head	the head of the rule
body	the body of the rule
choice	whether the head is a choice or a disjunction

weight_rule()

void Clingo::Observer::weight_rule ( ProgramAtomSpan  head, Weight  lower, WeightedLiteralSpan  body, bool  choice  )

inline

Callback for a weight rule.

Parameters

head	the head of the weight rule
lower	the lower bound of the weight rule
body	the weighted body of the weight rule
choice	whether the head is a choice or a disjunction

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

• clingo/observe.hh