[Verse 1] When pattern matching calls your name Each case must stand its ground The compiler checks every lane Makes sure no path's unfound Exhaustive is the rule we play Cover every single way [Chorus] By case, by case, we break it down Transparent paths through code we've found Every branch must have its place By case, by case, embrace the space Transparen shows what's hiding there Match expressions everywhere [Verse 2] Enums and unions take the stage Each variant gets its turn The underscore wildcard saves the page When patterns start to burn But explicit beats the catch-all game Name each case, don't hide in shame [Chorus] By case, by case, we break it down Transparent paths through code we've found Every branch must have its place By case, by case, embrace the space Transparen shows what's hiding there Match expressions everywhere [Bridge] Guards can filter what gets through When conditions must be true Destructuring pulls apart Complex types right from the start Compiler errors guide the way When cases go astray [Verse 3] Option types with Some and None Result with Error, Ok done Boolean true and false must show Nested matches help control flow Every possible outcome planned Safety held in programmer's hand [Chorus] By case, by case, we break it down Transparent paths through code we've found Every branch must have its place By case, by case, embrace the space Transparen shows what's hiding there Match expressions everywhere [Outro] When runtime comes there's no surprise Every case before your eyes By case we conquer, case by case Transparent logic finds its place
← Enums and pattern matching | Efficient Data Structure Selection →