spot  1.0
Public Types | Public Member Functions | Public Attributes | Static Public Attributes | Protected Attributes | List of all members
spot::state_explicit_number Class Reference

#include <tgba/tgbaexplicit.hh>

Inheritance diagram for spot::state_explicit_number:
Inheritance graph
Collaboration diagram for spot::state_explicit_number:
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Public Types

typedef int label_t
typedef identity_hash< int > label_hash_t
typedef std::list< transition > transitions_t

Public Member Functions

 state_explicit_number ()
 state_explicit_number (int label)
virtual void destroy () const
 Release a state.
const int & label () const
bool empty () const
virtual int compare (const state *other) const
 Compares two states (that come from the same automaton).
virtual size_t hash () const
 Hash a state.
virtual state_explicit< int,
identity_hash< int > > * 
clone () const
 Duplicate a state.

Public Attributes

transitions_t successors

Static Public Attributes

static const int default_val

Protected Attributes

int label_

Detailed Description

States labeled by an int

Member Typedef Documentation

typedef identity_hash< int > spot::state_explicit< int , identity_hash< int > >::label_hash_t
inherited
typedef int spot::state_explicit< int , identity_hash< int > >::label_t
inherited
typedef std::list<transition> spot::state_explicit< int , identity_hash< int > >::transitions_t
inherited

Constructor & Destructor Documentation

spot::state_explicit_number::state_explicit_number ( )
inline
spot::state_explicit_number::state_explicit_number ( int  label)
inline

Member Function Documentation

virtual state_explicit<int , identity_hash< int > >* spot::state_explicit< int , identity_hash< int > >::clone ( ) const
inlinevirtualinherited

Duplicate a state.

Implements spot::state.

virtual int spot::state_explicit< int , identity_hash< int > >::compare ( const state other) const
inlinevirtualinherited

Compares two states (that come from the same automaton).

This method returns an integer less than, equal to, or greater than zero if this is found, respectively, to be less than, equal to, or greater than other according to some implicit total order.

This method should not be called to compare states from different automata.

See Also
spot::state_ptr_less_than

Implements spot::state.

virtual void spot::state_explicit< int , identity_hash< int > >::destroy ( ) const
inlinevirtualinherited

Release a state.

Methods from the tgba or tgba_succ_iterator always return a new state that you should deallocate with this function. Before Spot 0.7, you had to "delete" your state directly. Starting with Spot 0.7, you update your code to this function instead (which simply calls "delete"). In a future version, some subclasses will redefine destroy() to allow better memory management (e.g. no memory allocation for explicit automata).

Reimplemented from spot::state.

bool spot::state_explicit< int , identity_hash< int > >::empty ( ) const
inlineinherited
virtual size_t spot::state_explicit< int , identity_hash< int > >::hash ( ) const
inlinevirtualinherited

Hash a state.

This method returns an integer that can be used as a hash value for this state.

Note that the hash value is guaranteed to be unique for all equal states (in compare()'s sense) for only has long has one of these states exists. So it's OK to use a spot::state as a key in a hash_map because the mere use of the state as a key in the hash will ensure the state continues to exist.

However if you create the state, get its hash key, delete the state, recreate the same state, and get its hash key, you may obtain two different hash keys if the same state were not already used elsewhere. In practice this weird situation can occur only when the state is BDD-encoded, because BDD numbers (used to build the hash value) can be reused for other formulas. That probably doesn't matter, since the hash value is meant to be used in a hash_map, but it had to be noted.

Implements spot::state.

const int & spot::state_explicit< int , identity_hash< int > >::label ( ) const
inlineinherited

Member Data Documentation

const int spot::state_explicit_number::default_val
static
int spot::state_explicit< int , identity_hash< int > >::label_
protectedinherited
transitions_t spot::state_explicit< int , identity_hash< int > >::successors
inherited

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

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