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C++ Weekly - Ep 188 - C++20's `constexpr` `new` Support

C++ Weekly With Jason Turner

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Advanced. Deep dive for people who know the field.

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Programming languagesSystems programmingC++Memory management

Jason Turner explains how C++20 introduces support for dynamic memory allocation using new inside constexpr functions.

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What people say. Recommended as a resource explaining C++20 changes that enable constexpr std::vector.

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user643011on Stack Overflow • Recommends

On “Cannot create constexpr std::vector”

There is a proposal to make std::vector constexpr : https://github.com/ldionne/wg21/blob/master/generated/p1004r1.pdf There is a whole talk about the upcoming C++20/23 changes: link to this video So check again with C++20 ! edit: constexpr std::vector has been approved for C++20 ! https://www.reddit.com/r/cpp/comments/au0c4x/201902_kona_iso_c_committee_trip_report_c20/ edit 2019-10: gcc trunk (with --std=c++2a flag) has started to implement constexpr new (a prerequisite for constexpr vector ). See: link to this video edit 2021-11: both constexpr std::vector and constexpr std::basic_string are now implemented in gcc 12 ( https://en.cppreference.com/w/cpp/compiler_support )
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