rof_egnar reversed adapter for(auto x:reversed(range))
summary
Describes a reversible range-for adapter that initially keeps references and therefore uses-after-free when fed temporaries; testing counts constructions and destructions to prove temporaries die before loop body sees elements. Uses C++17 class template argument deduction and special-cases initializer_list, then provides an rvalue overload that holds the container by value (moves in) so the temporary lives for the loop. Proposes deleting begin on temporaries to prevent misuse.
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