12 Jan
2009
12 Jan
'09
4:15 a.m.
One beginner to another, what about just breaking down and using multiple data declarations, then packing the rules into the outer data type and the misc. parameters into the inner data type?: data RuleBox = Rule0 RuleZero | Rule1 RuleOne Rule | Rule2 RuleTwo Rule Rule data RuleZero = Axiom Sequent data RuleOne = WeakeningL Sequent FormulaOccur | WeakeningR Sequent FormulaOccur | ContractionL ... | Contraction R ... | PermutationL ... | PermutationR ... | NotL ... | NotR ... data RuleTwo = Mix Sequent FormulaOccur | AndL ... | AndR ...