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嵌套模板的模板参数推导问题:MSVC编译失败Clang正常

MSVC下模板类嵌套视图的模板参数推导问题

我尝试让以下表达式自动推导view的模板参数:

object<bool> object;
object<bool>::view view = object.make_view(std::string("compA"), std::string("compB"));

// 而非显式指定模板参数
// object<bool>::view<false, 2> view = object.make_view(std::string("compA"), std::string("compB"));

对应的实现代码如下:

template <typename owner_t>
struct object
{
    template <bool const_v, std::size_t component_v>
    struct view
    {
        using object_t = std::conditional_t<const_v, const object, object>;

        object_t& object;
        std::array<std::string, component_v> components;

        template <typename... components_t>
        inline view(object_t& object, components_t&&... components)
            : object(object),
                components {std::forward<components_t>(components)...}
        {
        }
    };

    template <typename... components_t>
    view(const object&, components_t&&...)
        -> view<true, sizeof...(components_t)>;

    template <typename... components_t>
    view(object&, components_t&&...)
        -> view<false, sizeof...(components_t)>;

    template <typename... components_t>
    inline auto make_view(components_t&&... components)
    {
        return view {
            *this,
            std::forward<components_t>(components)...,
        };
    }
};

这段代码在Clang中可正常编译,但在MSVC中无法编译。若移除owner模板参数,将object改为普通非模板类型,代码即可正常编译。请问是否有人遇到过该问题并找到了解决方案?

内容的提问来源于stack exchange,提问作者Jazzwave06

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最近更新时间:2026.07.11 09:12:23