Switch statement with automatic break at each case step in C++
If we want to have a switch statement where for each case we need to run some instructions then break we would so something like this:
switch (condition) {
case (opt1):
// do stuff
break;
case (opt2):
// do stuff
break;
case (opt3):
// do stuff
break;
// ...
default:
// do stuff
}
Is it possible to have an exclusive switch, without fall through, where by default every option should break and not have to explicitly state the break instruction? And if not in C++ any idea if such a feature is available in other imperative languages?
C# needs the break too, but yells at you if you don't put it. You need to goto label; to explicitly fall through.
In C++, there is no way to do this natively (other than horrible macros, of course). However, Clang has the -Wimplicit-fallthrough warning. You can then insert [[clang::fallthrough]]; to silence the warning for a deliberate fallthrough.
Documentation : http://clang.llvm.org/docs/AttributeReference.html#fallthrough-clang-fallthrough
"There is no automatic fall through" in Golang. https://golang.org/doc/effective_go.html#switch
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