lean2/tests/lean/run/e13.lean

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