lean2/tests/lean/run/e13.lean

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prelude
precedence `+`:65
namespace nat
constant nat : Type.{1}
constant add : nat → nat → nat
infixl + := add
end nat
namespace int
open nat (nat)
constant int : Type.{1}
constant add : int → int → int
infixl + := add
constant of_nat : nat → int
namespace coercions
coercion of_nat
end coercions
end int
open nat
open int
constants n m : nat
check n+m -- coercion nat -> int is not available
open int.coercions
check n+m -- coercion nat -> int is available