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12.3.59 SP_next_solution()


#include <sicstus/sicstus.h>

SP_next_solution(SP_qid query);

Look for the next solution to the given query.



The query, created by SP_open_query().

Return Value

SP_SUCCESS for success, SP_FAILURE for failure, SP_ERROR if an error condition occurred.


This will cause the Prolog engine to backtrack over any current solution of an open query and look for a new one. The given argument must be the innermost query that is still open, i.e. it must not have been terminated explicitly by SP_close_query() or SP_cut_query(). Only when the return value is SP_SUCCESS are the values in the query arguments valid, and will remain so until backtracking into this query or an enclosing one.

See Also

Finding Multiple Solutions of a Call.

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