Re: [boost] variant - off topic

On Sun, 7 Apr 2019 at 18:44, Robert Ramey via Boost wrote:

template struct safe_variant : public std::variant { // for each T static assert that is_trivially_constructible<T> == true };

Which gets trickier. But would be cool if someone wanted to make this.

#include #include <variant> struct Foo { Foo ( ) = delete; }; template struct safe_variant : public std::variant { static_assert ( std::conjunction::value, "is not trivially constructible" ); }; int main ( ) { safe_variant sv1; // compiles // safe_variant sv2; // does not compile } Unless I mis-understand what you mean, this does the trick. degski -- *Microsoft, please kill Paint3D*