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Refactor game state computation

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Cleaning up the Tetris module, mainly to favor a MonadState style over
explicit `Game -> Game` functions, which were a little awkward. This also
led naturally to explicitly isolating `IO`, by having pure state modifiers
with types like `Tetris a ~ forall m. StateT Game m a` being executed
with `m ~ Identity`, and those few modifiers that need IO specified by
`TetrisT a ~ StateT Game IO a`.
This commit is contained in:
Sam Tay 2018-12-27 10:28:26 -05:00
parent 09de01695c
commit ad1fcf9192
6 changed files with 179 additions and 157 deletions
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cabal-dev