Disable rvalue binding through constructor to element constant reference

Question

I am working on a class of matrix representations from which the constructor takes the matrix as a parameter and binds it to the const element of the link. I would really like to avoid the rvalues ​​binding, since they do not bind using the constructor parameter, and we end up with a link. I came up with the following (simplified code):

 struct Foo{}; class X { const Foo& _foo; public: X(const Foo&&) = delete; // prevents rvalue binding X(const Foo& foo): _foo(foo){} // lvalue is OK }; Foo get_Foo() { return {}; } const Foo get_const_Foo() { return {}; } Foo& get_lvalue_Foo() { static Foo foo; return foo; } int main() { // X x1{get_Foo()}; // does not compile, use of deleted function // X x2{get_const_Foo()}; // does not compile, use of deleted function X x3{get_lvalue_Foo()}; // this should be OK } 

I basically delete the constructor that takes const Foo&& as a parameter. Note that I need const , because otherwise, someone might return const Foo from the function, in which case it will be bound to the const Foo& constructor.

Question:

Is this the correct paradigm for disabling rvalue bindings? Did I miss something?