<ul data-eligibleForWebStory="false"><li>The 'unreachable()' function exists to indicate to compilers and programmers that a specific line of code is never executed.</li><li>It can be used to suppress warnings related to unreachable code and to optimize code by conveying to the compiler that certain conditions are impossible.</li><li>By using 'unreachable()', warning messages about unreachable code can be avoided, especially in scenarios like switch statements or function pointer calls.</li><li>In some cases, 'unreachable()' helps in indicating to compilers and programmers that a particular code path is unreachable and should not be considered during compilation.</li></ul>

Unreachable: The Standard Function for Inserting Undefined Behavior

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