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26 lines
601 B
Text
26 lines
601 B
Text
typeclass Copy =
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& copy : Copy -> Copy
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typeclass (Ord : #Eq) =
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& is_less_then : Ord -> Bool
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typeclass (D : #A #B #C) 'A 'B =
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& do_something : Unit -> (& 'A & 'B)
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typeclass E 'A =
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& do_something : Unit -> 'A
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decl ( == ) ('A : #Ord) : 'A -> 'A -> Bool
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def ( == ) : a b = a.is_equal_to b
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decl ( < ) ('A : #Ord) : 'A -> 'A -> Bool
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def ( < ) : a b = a.is_less_then b
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decl ( > ) ('A : #Ord) : 'A -> 'A -> Bool
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def ( > ) : a b = !(a <= b)
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decl ( <= ) ('A : #Ord) : 'A -> 'A -> Bool
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def ( <= ) : a b = (a < b) || (a == b)
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decl ( >= ) ('A : #Ord) : 'A -> 'A -> Bool
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def ( >= ) : a b = !(a < b)
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