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require("import") -- the import fn
import("abstract_access") -- import code
-- catch "undefined" global variables
local env = _ENV -- Lua 5.2
if not env then env = getfenv () end -- Lua 5.1
setmetatable(env, {__index=function (t,i) error("undefined global variable `"..i.."'",2) end})
-- trying to instantiate pure virual classes
-- should fail
assert(pcall(abstract_access.A)==false)
assert(pcall(abstract_access.B)==false)
assert(pcall(abstract_access.C)==false)
-- instantiate object
d=abstract_access.D()
--call fn
assert(d:do_x()==1)
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