Check for switch-case fall-throughs without any case matching

[stv0g]

By @koraa in #27 (comment)

Severerity: N/A – What is the situation with regards to switch-case-fallthrough and none of the branches of a switch statement being covered in go?

[stv0g]

The Go programming language does not have automatic fallthrough in switch-case statements like some other programming languages (e.g., C and C++). In Go, when a case is matched in a switch statement, it executes the corresponding block of code and then exits the switch statement.

If you want to achieve fallthrough behavior, where the execution continues to the next case block even after matching a case, you need to explicitly use the fallthrough keyword. When the fallthrough keyword is used in a case block, it forces the control flow to transfer to the next case block, regardless of whether the next case's condition is true or not.

Regarding the situation where none of the branches of a switch statement are covered, Go has strict compilation rules that require all cases to be explicitly covered. If a case is missing, the Go compiler will raise a compilation error.