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View Code? Open in Web Editor NEWThis is a data-structure independent implementation of A* search.
License: BSD 3-Clause "New" or "Revised" License
This is a data-structure independent implementation of A* search.
License: BSD 3-Clause "New" or "Revised" License
When given a graph that has loops on every vertex, the aStar
function never returns, even after a path has been found. The actual search seems to succeed, but building the path back to the start never finishes.
As a minimal example, I've been able to reproduce the problem with this (with S
denoting Data.HashSet
):
ghci> aStar (\x -> S.fromList [x, x - 1, x + 1]) (\_ _ -> 1) (const 0) (== 10) 1
ghci then hangs on Just
. This indicates that the goal has been found and that the problem occurs in line 78 (or 133). It happens for both the monadic and normal versions of the function.
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