Exhaustive case

[rogerdpack]

Yeah case statements have been one of the few places where I’ve thought “what?” with crystal…

other examples (though they deal with Enum’s, somewhat related?)

Are there plans for exhaustiveness checks on case with enums?

Given the following code: enum BasicColor Red, Green, Blue end def max_out(color : BasicColor) : String case color when BasicColor::Red then "#ff0000" when BasicColor::Green then "#00ff00" when BasicColor::Blue then "#0000ff" end end puts max_out(BasicColor::Red) Currently, you get this error: Error: method must return String but it is returning (String | Nil) This of course makes no sense, because you annotated the method param as exactly BasicColor (not Ba…

https://groups.google.com/d/msg/crystal-lang/YJbUG1lQP3Q/A2sJzUQACgAJ