A common pattern in a world where `null` exists is ```d if (!a) a = b; ``` that is semantically equivalent, if `a` is a pointer (or if it implements opCast!bool), to D ```d if (a is null) a = b; ``` I propose the get rid of the statement layer. The two statments (there are more actually) can be a single expression: ```d a ?= b; ``` As a new binary assign operator.