如何在 C Lambda（C 11 和 C 14）中實現移動捕獲？

auto u = make_unique<some_type>( some, parameters ); 

// move the unique_ptr into the lambda
go.run( [ u = move(u) ] { do_something_with( u ); } ); 

go.run( [ u = move(u) ] mutable { do_something_with( std::move(u) ); } );

#include <cassert>
#include <memory>
#include <utility>

template <typename T>
struct rref_impl
{
    rref_impl() = delete;
    rref_impl( T &amp;&amp; x ) : x{std::move(x)} {}
    // ... implementation
};

template<typename T> rref_impl<T> make_rref( T &amp;&amp; x )
{
    return rref_impl<T>{ std::move(x) };
}

int main()
{
    std::unique_ptr<int> p{new int(0)};
    auto rref = make_rref( std::move(p) );
    auto lambda =
        [rref]() mutable -> std::unique_ptr<int> { return rref.move(); };
    assert(  lambda() );
    assert( !lambda() );
}

#include <utility>

template <typename T, typename F>
class capture_impl
{
    T x;
    F f;
public:
    // ... implementation
};

template <typename T, typename F>
capture_impl<T,F> capture( T &amp;&amp; x, F &amp;&amp; f )
{
    return capture_impl<T,F>(
        std::forward<T>(x), std::forward<F>(f) );
}

int main()
{
    std::unique_ptr<int> p{new int(0)};
    auto lambda = capture( std::move(p),
        []( std::unique_ptr<int> &amp; p ) { return std::move(p); } );
    assert(  lambda() );
    assert( !lambda() );
}