spot  2.8.1
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spot::state_ta_explicit Class Referencefinal

#include <spot/ta/taexplicit.hh>

Inheritance diagram for spot::state_ta_explicit:
Collaboration diagram for spot::state_ta_explicit:


struct  transition
 Explicit transitions. More...

Public Types

typedef std::list< transition * > transitions

Public Member Functions

 state_ta_explicit (const state *tgba_state, const bdd tgba_condition, bool is_initial_state=false, bool is_accepting_state=false, bool is_livelock_accepting_state=false, transitions *trans=nullptr)
virtual int compare (const spot::state *other) const override
 Compares two states (that come from the same automaton). More...
virtual size_t hash () const override
 Hash a state. More...
virtual state_ta_explicitclone () const override
 Duplicate a state. More...
virtual void destroy () const override
 Release a state. More...
transitions * get_transitions () const
transitions * get_transitions (bdd condition) const
void add_transition (transition *t, bool add_at_beginning=false)
const stateget_tgba_state () const
const bdd get_tgba_condition () const
bool is_accepting_state () const
void set_accepting_state (bool is_accepting_state)
bool is_livelock_accepting_state () const
void set_livelock_accepting_state (bool is_livelock_accepting_state)
bool is_initial_state () const
void set_initial_state (bool is_initial_state)
bool is_hole_state () const
 Return true if the state has no successors. More...
void delete_stuttering_and_hole_successors ()
 Remove stuttering transitions and transitions leading to states having no successors. More...
void free_transitions ()

Public Attributes


Detailed Description

states used by spot::ta_explicit.

Member Function Documentation

◆ clone()

virtual state_ta_explicit* spot::state_ta_explicit::clone ( ) const

Duplicate a state.

Implements spot::state.

◆ compare()

virtual int spot::state_ta_explicit::compare ( const spot::state other) const

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

Implements spot::state.

◆ delete_stuttering_and_hole_successors()

void spot::state_ta_explicit::delete_stuttering_and_hole_successors ( )

Remove stuttering transitions and transitions leading to states having no successors.

◆ destroy()

virtual void spot::state_ta_explicit::destroy ( ) const

Release a state.

Methods from the tgba or twa_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 should update your code to use this function instead. destroy() usually calls delete, except in subclasses that destroy() to allow better memory management (e.g., no memory allocation for explicit automata).

Reimplemented from spot::state.

◆ hash()

virtual size_t spot::state_ta_explicit::hash ( ) const

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 as long as 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.

◆ is_hole_state()

bool spot::state_ta_explicit::is_hole_state ( ) const

Return true if the state has no successors.

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

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