error C2248: 'std::unique_ptr<_Ty>::unique_ptr' : cannot access private member declared in class 'std::unique_ptr<_Ty>'

gistfile1.cpp

class AstNode
{
public:
};

typedef std::unique_ptr<AstNode> AstPtr;
typedef std::vector<AstPtr> AstList;

class AstFuncImpl : public AstNode
{
public:
    AstFuncImpl(TypedName type, AstList&& list)
    	: type(type)
		, list(std::move(list))
	{
	}

	TypedName type;
	AstList list;
private:
	AstFuncImpl(const AstFuncImpl&);
	AstFuncImpl&operator=(const AstFuncImpl&);
};

gistfile2.cpp

if (accept(Token::LBLOCK)) {
	if (name.type->ttype != TypeBase::FUNC)
		throw CompileError("Expected a function type");
	AstList node = parse_block();
	require(Token::RBLOCK);
	return AstPtr(new AstFuncImpl(name, std::move(node)));
}

gistfile3.cpp

class AstCall : public AstExprNode
{
public:
    AstCall(AstExprPtr&& func, std::vector<AstExprPtr>&& params)
		: func(std::move(func))
		, params(std::move(params))
	{
	}

	AstExprPtr func;
	std::vector<AstExprPtr> params;
};