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ITE stands for if-then-else. ITE([a-z], leaf(R1), leaf(R2)) means: “if the character is in [a-z], the derivative is R1, otherwise it’s R2”. these trees can nest, splitting the character space into finer partitions as needed. the key insight is that the derivative function never takes a character argument - it produces a complete map from all possible characters to their resulting states in one shot.
，详情可参考新收录的资料
Последние новости，更多细节参见新收录的资料
instance.field.subfield
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