Writing clean cleanup logic in C++ without complex try/catch blocks using <scope>:

#include <scope>

void DatabaseTransaction() {
    BeginTransaction();
    // Automatically rolls back if an exception is thrown!
    std::scope_fail rollback([]{ RollbackTransaction(); });
    
    // Automatically releases lock on scope exit (success or failure)
    std::scope_exit cleanup([]{ ReleaseLocks(); });
    
    ExecuteQueries();
    CommitTransaction();
}

std::scope_exit executes upon normal or exceptional scope exit. std::scope_fail executes only if an unhandled exception is currently unwinding the stack!

std::scope_fail is the cleanest way to handle transaction rollbacks without polluting business logic with nested try...catch blocks.

Zero-cost abstraction: compiles directly to RAII destructor calls during stack unwinding.