The syntactic sugar being asked for in this case is awfully thin. I definitely put this in the class of "stop pining for it and just use what's there".
If the poster wants to particularize this to C++ because C++'s syntax can't support it in any reasonable manner, that's fine, but that's a C++ problem, not a "Programming languages..." problem. Which would be perfectly understandable and I'm not really complaining, more clarifying that most of the rest of the world can just rub together three or four existing constructs in a pretty reasonable manner to get this.
If the poster wants to particularize this to C++ because C++'s syntax can't support it in any reasonable manner, that's fine, but that's a C++ problem, not a "Programming languages..." problem. Which would be perfectly understandable and I'm not really complaining, more clarifying that most of the rest of the world can just rub together three or four existing constructs in a pretty reasonable manner to get this.