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c++ reflection c++26

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May 12, 2026 Score: 5 Rep: 45,734 Quality: Medium Completeness: 50%

membersof returns a std::vector. This can be part of a constant expression as long as it is destroyed before the constant expression ends, but cannot be the entire constant expression because the elements are not deallocated.

Use std::definestaticarray to get an static storage duration array instead of a vector referring to dynamic storage duration elements:

#include 
#include  
int main() {
    constexpr auto nsrefl = ^^std;
    constexpr auto ctx = std::meta::accesscontext::unchecked();
    constexpr auto members = std::definestaticarray(std::meta::membersof(nsrefl, ctx));
    template for (constexpr auto& member : auto(members)) {
        if constexpr (std::meta::hasidentifier(member))
            std::cout