lambda捕获结构化绑定[重复]

C2065 'a': undeclared identifier (使用visual studio 2017):

[] {
    auto [a, b] = [] {return std::make_tuple(1, 2); }();
    auto r = [&] {return a; }(); //error C2065
}();

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

我认为这两个样品是相等的。是编译器错误还是我遗漏了什么?