Why are deque's pop_front() and pop_back() not noexcept?











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Is there any reason that std::deque's pop_front() and pop_back() are not noexcept in C++11 and higher or was that just forgotten?






c++ c++11 deque c++-standard-library noexcept







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  • How could they be?
    – molbdnilo
    14 hours ago















up vote
9
down vote

favorite












Is there any reason that std::deque's pop_front() and pop_back() are not noexcept in C++11 and higher or was that just forgotten?






c++ c++11 deque c++-standard-library noexcept







share|improve this question






















  • How could they be?
    – molbdnilo
    14 hours ago













up vote
9
down vote

favorite









up vote
9
down vote

favorite











Is there any reason that std::deque's pop_front() and pop_back() are not noexcept in C++11 and higher or was that just forgotten?






c++ c++11 deque c++-standard-library noexcept







share|improve this question













Is there any reason that std::deque's pop_front() and pop_back() are not noexcept in C++11 and higher or was that just forgotten?






c++ c++11 deque c++-standard-library noexcept




c++ c++11 deque c++-standard-library noexcept






share|improve this question













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asked 14 hours ago









Benjamin Buch

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823715












  • How could they be?
    – molbdnilo
    14 hours ago


















  • How could they be?
    – molbdnilo
    14 hours ago
















How could they be?
– molbdnilo
14 hours ago




How could they be?
– molbdnilo
14 hours ago












1 Answer
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6
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If I understood correctly, the standard doesn't specify noexcept on functions with a narrow contract (with a precondition which violation leads to UB). N3279 and more recently P0884 are talking about this and about how to decide whether a function should be noexcept or not (or conditionally).



This is the case for std::deque's pop_front and pop_back but also on front and back where there is no call to a destructor. Same for std::vector's pop_back, front and back for example.






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    1 Answer
    1






    active

    oldest

    votes








    1 Answer
    1






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes








    up vote
    6
    down vote



    accepted










    If I understood correctly, the standard doesn't specify noexcept on functions with a narrow contract (with a precondition which violation leads to UB). N3279 and more recently P0884 are talking about this and about how to decide whether a function should be noexcept or not (or conditionally).



    This is the case for std::deque's pop_front and pop_back but also on front and back where there is no call to a destructor. Same for std::vector's pop_back, front and back for example.






    share|improve this answer








    New contributor




    Rémi Galan Alfonso is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.






















      up vote
      6
      down vote



      accepted










      If I understood correctly, the standard doesn't specify noexcept on functions with a narrow contract (with a precondition which violation leads to UB). N3279 and more recently P0884 are talking about this and about how to decide whether a function should be noexcept or not (or conditionally).



      This is the case for std::deque's pop_front and pop_back but also on front and back where there is no call to a destructor. Same for std::vector's pop_back, front and back for example.






      share|improve this answer








      New contributor




      Rémi Galan Alfonso is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.




















        up vote
        6
        down vote



        accepted







        up vote
        6
        down vote



        accepted






        If I understood correctly, the standard doesn't specify noexcept on functions with a narrow contract (with a precondition which violation leads to UB). N3279 and more recently P0884 are talking about this and about how to decide whether a function should be noexcept or not (or conditionally).



        This is the case for std::deque's pop_front and pop_back but also on front and back where there is no call to a destructor. Same for std::vector's pop_back, front and back for example.






        share|improve this answer








        New contributor




        Rémi Galan Alfonso is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
        Check out our Code of Conduct.









        If I understood correctly, the standard doesn't specify noexcept on functions with a narrow contract (with a precondition which violation leads to UB). N3279 and more recently P0884 are talking about this and about how to decide whether a function should be noexcept or not (or conditionally).



        This is the case for std::deque's pop_front and pop_back but also on front and back where there is no call to a destructor. Same for std::vector's pop_back, front and back for example.







        share|improve this answer








        New contributor




        Rémi Galan Alfonso is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
        Check out our Code of Conduct.









        share|improve this answer



        share|improve this answer






        New contributor




        Rémi Galan Alfonso is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
        Check out our Code of Conduct.









        answered 12 hours ago









        Rémi Galan Alfonso

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        762




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        New contributor





        Rémi Galan Alfonso is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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        Rémi Galan Alfonso is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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