lean2/tests/lean/run/e7.lean

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precedence `+`:65
namespace nat
variable nat : Type.{1}
variable add : nat → nat → nat
infixl + := add
end
namespace int
using nat (nat)
variable int : Type.{1}
variable add : int → int → int
infixl + := add
variable of_nat : nat → int
coercion of_nat
end
using nat
using int
variables n m : nat
variables i j : int
-- 'Most recent' are always tried first
print raw i + n
-- So, in the following one int.add is tried first, and we
-- get int.add (int.of_nat n) (int.of_nat m)
check n + m
print ">>> Forcing nat notation"
-- Force natural numbers
check #nat n + m
-- Moving 'nat' to the 'front'
print ">>> Moving nat notation to the 'front'"
using nat
print raw i + n
check n + m