There is no reason you can not have something like "variable = int(variable)" in a strongly typed system. In fact, Haskell lets you do (essentially) this by sha

There is no reason you can not have something like "variable = int(variable)" in a strongly typed system. In fact, Haskell lets you do (essentially) this by shadowing variables. This particular example wouldn't work, because Haskell would view it as a recursive definition, but there is no reason you couldn't design a language so that the asignee side looks at the pre-shadow variable.