0 present participle of backtrack
2 to say that you did not mean something you said earlier or say that you have changed your opinion:
[ + speech ] "All right," he backtracked, "It's possible that I was mistaken."
The officers were forced to backtrack on their statements.
She refused to backtrack from her criticisms of the proposal.
This enables one to start the design stage on a consistent version of the system, which considerably reduces the backtracking process.
When compiling a set of deterministic rules with some non-deterministic matching conditions, some choice points are needed to handle the backtracking.
We explain the modifications needed for backtracking, trailing, variable binding and tidy trail in this new layout.
A solution for this problem is to remove all dangerous entries (those referencing untagged heap cells) from the remembered sets upon backtracking.
This approach is optimal for frequent variable-variable bindings, and where dereferencing is more frequent than backtracking.
Section 5 introduces conflict sets and our generic search algorithm, and recasts backtracking search in that framework.
The presence of the all/2 collector avoids the need for backtracking over multiple remote answers.
This is best done on the heap since backtracking permits the space to be reclaimed when the substitution itself becomes redundant.
