56 lines
969 B
Text
56 lines
969 B
Text
prelude
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precedence `+`:65
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namespace nat
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constant nat : Type.{1}
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constant add : nat → nat → nat
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infixl + := add
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end nat
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namespace int
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open nat (nat)
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constant int : Type.{1}
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constant add : int → int → int
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infixl + := add
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constant of_nat : nat → int
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coercion of_nat
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end int
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constants n m : nat.nat
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constants i j : int.int
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section
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open [notations] nat
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open [notations] int
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open [decls] nat
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open [decls] int
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check n+m
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check i+j
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-- check i+n -- Error
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end
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namespace int
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open [decls] nat (nat)
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-- Here is a possible trick for this kind of configuration
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definition add_ni (a : nat) (b : int) := (of_nat a) + b
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definition add_in (a : int) (b : nat) := a + (of_nat b)
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infixl + := add_ni
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infixl + := add_in
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end int
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section
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open [notations] nat
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open [notations] int
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open [declarations] nat
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open [declarations] int
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check n+m
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check i+n
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check n+i
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end
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section
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open nat
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open int
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check n+m
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check i+n
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end
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