Implements choice rules. More...

#include <include/dlvhex2/ChoicePlugin.h>

Inheritance diagram for ChoicePlugin:

Collaboration diagram for ChoicePlugin:

Data Structures
class	CtxData
Public Member Functions
	ChoicePlugin ()
	Constructor.
virtual	~ChoicePlugin ()
	Destructor.
virtual void	printUsage (std::ostream &o) const
	Output help message for this plugin.
virtual void	processOptions (std::list< const char * > &pluginOptions, ProgramCtx &)
	Processes options for this plugin.
virtual std::vector < HexParserModulePtr >	createParserModules (ProgramCtx &)
	Provide parser modules.
virtual std::vector < PluginAtomPtr >	createAtoms (ProgramCtx &ctx) const
	Publish external computation sources to dlvhex.
virtual void	setupProgramCtx (ProgramCtx &)
	Altering the ProgramCtx permits plugins to do many things, e.g., * installing model and finish callbacks * removing default model (and final) hooks * setting maxint * changing and configuring the solver backend to be used See internal plugins for example usage.

Detailed Description

Implements choice rules.

Definition at line 44 of file ChoicePlugin.h.

Constructor & Destructor Documentation

ChoicePlugin::ChoicePlugin ( )

Constructor.

Definition at line 67 of file ChoicePlugin.cpp.

References PluginInterface::setNameVersion().

ChoicePlugin::~ChoicePlugin ( ) [virtual]

Destructor.

Definition at line 74 of file ChoicePlugin.cpp.

Member Function Documentation

std::vector< PluginAtomPtr > ChoicePlugin::createAtoms ( ProgramCtx & ctx ) const [virtual]

Publish external computation sources to dlvhex.

This is the central location where the user's atoms are made public. dlvhex will call this function for all found plugins, which write their atoms in the provided map. This map associates strings with pointers to PluginAtom objects. The strings denote the name of the atom as it should be used in the program.

Override this method to publish your atoms.

Example:

   std::vector<PluginAtomPtr>
   createAtoms(ProgramCtx& ctx) const
   {
    std::vector<PluginAtomPtr> ret;
      PluginAtomPtr newatom1(new MyAtom1);
      PluginAtomPtr newatom2(new MyAtom2);
      ret["newatom1"] = newatom1;
      ret["newatom2"] = newatom2;
      return ret;
   }

Here, we assume to have defined atoms MyAtom1 and MyAtom2 derived from PluginAtom. These atom can now be used in a HEX-program with the predicate &newatom1[]() and &newatom2[]().

Reimplemented from PluginInterface.

Definition at line 461 of file ChoicePlugin.cpp.

std::vector< HexParserModulePtr > ChoicePlugin::createParserModules ( ProgramCtx & ) [virtual]

Provide parser modules.

This is the preferred way to extend the input language by supplying dlvhex with parser modules that plug into the HEX grammar and extend the syntax for valid program input.

See the QueryPlugin and the StrongNegationPlugin for example plugins that use this feature.

Reimplemented from PluginInterface.

Definition at line 446 of file ChoicePlugin.cpp.

References DBGLOG, ChoicePlugin::CtxData::enabled, and ProgramCtx::getPluginData().

void ChoicePlugin::printUsage ( std::ostream & o ) const [virtual]

Output help message for this plugin.

Reimplemented from PluginInterface.

Definition at line 80 of file ChoicePlugin.cpp.

void ChoicePlugin::processOptions	(	std::list< const char * > &	pluginOptions,
		ProgramCtx &	ctx
	)		`[virtual]`

Processes options for this plugin.

If you override this method, remove all options your plugin recognizes from pluginOptions. (Do not free the pointers, the const char* directly come from argv.) You can store configuration of your plugin using PluginData and ProgramCtx::getPluginData (see there for more information.)

Reimplemented from PluginInterface.

Definition at line 92 of file ChoicePlugin.cpp.

References DBGLOG, ChoicePlugin::CtxData::enabled, ProgramCtx::getPluginData(), and WARNING().

void ChoicePlugin::setupProgramCtx ( ProgramCtx & ) [virtual]

Altering the ProgramCtx permits plugins to do many things, e.g., * installing model and finish callbacks * removing default model (and final) hooks * setting maxint * changing and configuring the solver backend to be used See internal plugins for example usage.

Reimplemented from PluginInterface.

Definition at line 469 of file ChoicePlugin.cpp.

References ChoicePlugin::CtxData::enabled, ProgramCtx::getPluginData(), and ProgramCtx::registry().

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

include/dlvhex2/ChoicePlugin.h
src/ChoicePlugin.cpp

Data Structures

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation