lean2/tests/lean/lua12.lean

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Variables x y z : Int
(**
local env = get_environment()
local plus = Const{"Int", "add"}
local x, y = Consts("x y")
local def = plus(plus(x, y), iVal(1000))
print(def, ":", env:check_type(def))
env:add_definition("sum", def)
**)
Eval sum + 3