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22 lines
578 B
Plaintext
22 lines
578 B
Plaintext
abstract Logic = {
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flags startcat = Stm ;
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cat
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Stm ; -- top-level statement
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Prop ; -- proposition
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Atom ; -- atomic formula
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Ind ; -- individual term
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Dom ; -- domain expression
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Var ; -- variable
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[Prop] {2} ; -- list of propositions, 2 or more
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[Var] {1} ; -- list of variables, 1 or more
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fun
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SProp : Prop -> Stm ;
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And, Or : [Prop] -> Prop ;
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If : Prop -> Prop -> Prop ;
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Not : Prop -> Prop ;
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PAtom : Atom -> Prop ;
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All, Exist : [Var] -> Dom -> Prop -> Prop ;
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IVar : Var -> Ind ;
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VString : String -> Var ;
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}
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