Generate BrainF**k code_c++转brainf-优快云博客

本文深入探讨了数据处理中的关键操作，如移动、添加、循环、存取整数等，并通过具体代码实例展示了如何将这些操作转换为字符序列。同时，详细介绍了测试用例及其预期输出，为理解数据流编程提供了清晰的指导。

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data Node = Move Int
	| Add Int Int
	| Loop Int [Node] 
	| Put Int 
	| Get Int 
	deriving (Show,Eq)
type Prog = [Node]
gen :: [Node] -> [Char]
gen x = node x 0 0 where
	move :: Int -> [Char]
	move n =
		replicate (abs n) (if n>0 then '>' else '<')
	node :: [Node] -> Int -> Int -> [Char]
	node [] pos end = 
		move(end-pos)
	node (Move n:xs) pos end = 
		node xs (pos-n) end
	node (Add p n:xs) pos end = 
		let c = if n>0 then '+' else '-' in
		move(p-pos)++replicate (abs n) c++node xs p end
	node (Loop p x:xs) pos end = 
		move(p-pos)++"["++node x p p++"]"++node xs p end
	node (Put p:xs) pos end = 
		move(p-pos)++"."++node xs p end
	node (Get p:xs) pos end = 
		move(p-pos)++","++node xs p end

dup :: Int -> Int -> Int -> [Node]
dup from to temp = 
	[Loop from [Add from (-1),Add to 1,Add temp 1],Loop temp [Add temp (-1),Add from 1]]
clr pos = [Loop pos [Add pos (-1)]]
mov from to = 
	[Loop from [Add from (-1),Add to 1]]
swap x y temp = 
	mov x temp++mov y x++mov temp y
stack_push x = 
	[Add 0 x,Move 1]
test :: [([Node],[Char])]
test = [
	(swap 1 0 2, ">[->+<]<[->+<]>>[-<<+>>]<<"),
	(clr 2, ">>[-]<<"),
	([Add 4 2,Add 2 4,Loop 3 [Add 2 (-1),Add 3 1]],">>>>++<<++++>[<->+]<<<"),
	([Add 4 2,Add 2 4,Move 1,Add 0 2]++clr 4,">>>>++<<++++<++>>>>[-]<<<<")
	]

main = do
	print $ map (\(x,y)->gen x==y) test