deferred class ABSTRACT_BACKTRACKING_ALTERNATIVE
Summary
Overview
features
  • previous: ABSTRACT_BACKTRACKING_ALTERNATIVE
    For the linked stack of alternatives.
previous: ABSTRACT_BACKTRACKING_ALTERNATIVE
writable attribute
For the linked stack of alternatives.
writable attribute
The sequence to continue after a success in exploration of the current alternative.
set_continuation (value: ABSTRACT_BACKTRACKING_SEQUENCE)
effective procedure
writable attribute
Record of the top of the stack of sequence to restore the state of the exploration after that all alternatives were explored.
set_top_sequence (value: ABSTRACT_BACKTRACKING_SEQUENCE)
effective procedure
next_alternative (explorer: ABSTRACT_BACKTRACKING)
deferred procedure
Called by ABSTRACT_BACKTRACKING to let the current object switch to the next alternative to explore.
release
effective procedure
Called by ABSTRACT_BACKTRACKING to release current instance to the pool.
get_twin: ABSTRACT_BACKTRACKING_ALTERNATIVE
effective function
Return a twin of current from the pool
pool: ABSTRACT_BACKTRACKING_POOL[ABSTRACT_BACKTRACKING_ALTERNATIVE]
deferred function
The pool that will record Current
writable attribute
Internal link used by the pool to chain its poolable items.
set_pool_link (other: ABSTRACT_BACKTRACKING_POOLABLE)
effective procedure
Set 'pool_link' to 'other'