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> Most C++ code uses switch frequently, usually without taking advantage of fallthrough. I am not so sure about this. Thinking back on my uses of switch in C a

• dbaupp 12y ago
  Rust still offers an equivalent to things like switch (x) { case 0: case 1: foo(); break; case 2: case 3: bar(); break; default: baz(); } in the form of match x { 0 | 1 => foo(), 2 | 3 => bar(), _ => baz() } In any case, Rust's match is so much more powerful than switch, offering (nested) pattern matching like Haskell's `case`.
• DerekL 12y ago
  There's two different kinds of fallthrough in C++. The most common is using the same code for multiple values. Rust already supports this by allowing multiple values and ranges of values for each pattern. The much more rare use of fallthrough is executing code for one case, and then continuing on to execute the code for the next case. This seems to be much more rare. In fact, in my large Android application, I turned on warnings for this type of fallthrough, and out of hundreds of switch statements, only eight used it, and all but one was a mistake.