One day, this ex-boss of mine dropped the following bomb:

“Stop using switch statements, the switch statement is archaic.”

The if statement should be even more archaic, right? So, should we stop using ifs as well?

  • 13
    Upcoming C++42 and Java 13 will put things right with new keywords "although", "elsewise" and "failing_this":

    You can then avoid if-else by writing

    although( x == 42 ) { doStuff(); }

    elsewise( x == 666 ){ doOtherStuff(); }

    failing_this{ doWhateverStuff; }
  • 3
    There actually is the anti if movement. And depending on the conext I believe switch and if are actually satements we should avoid
  • 5
    if archaic() {
    return dontUse()

    Oh... Wait...
  • 2
    @host127001 Sure, there are times where you can legitimately use too many ifs. But those are reasonable concerns. This guy wasn't reasonable. 😆
  • 8
    He is right! Legends do this:


    You're welcome!
  • 3
    @mohammed That certainly gets rid of them.
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    You can usually replace switch statements with polymorphism.

    This is also interesting:
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    @FrodoSwaggins I think on the JVM polymorphism would reduce the size of the method, which could lead to both of them being inlined.
  • 0
    @FrodoSwaggins is bringing the sanity of reason yet again.
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    @FrodoSwaggins I wasn't referring to a case because I've replaced it with a method.

    I think:
    If the virtual function is inlined the code is already faster than a jump table. Inlining the outer function could also be possible (MaxInlineLevel = 9).

    I don't know much about this stuff, so this could be wrong. My original point was that polymorphism is often easier to read and I really don't care if it takes a nanosecond longer to call a function.
  • 0
    @FrodoSwaggins I missed you 🙁
  • 0
    @FrodoSwaggins Case was a really bad pun...

    JIT compilers can know this stuff at compile time. For example the code inside a loop can be replaced with a better version after collecting statistics for a few iterations. I guess the C++ compiler can also figure out the exact class in some situations.
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