Lambda implicit capture fails with variable declared from structured binding

Question

With the following code, I get a compile error C2065 \'a\': undeclared identifier (using visual studio 2017):

[] {
    auto [a, b] = [] {return          


        

Answer 1

A possible workaround is to use a lambda capture with the initializer. The following code compiles fine in Visual Studio 2017 15.5.

[] {
    auto[a, b] = [] {return std::make_tuple(1, 2); }();
    auto r = [a = a] {return a; }();
}();