小编Nie*_*sen的帖子

以下代码是googlemock项目中的代码的简化版本,无法在Visual Studio 2015 Update 1中编译,但它在clang [Apple LLVM版本7.0.0(clang-700.1.76)]上编译.

struct ConvertibleFromAny
{
    ConvertibleFromAny(int a_value);

    template <typename T>
    ConvertibleFromAny(const T& a_value);
};

template <typename T>
struct Matcher
{
    Matcher(T value);
};

template <typename Rhs>
struct EqMatcher
{
    explicit EqMatcher(const Rhs& rhs);

    template <typename Lhs>
    operator Matcher<Lhs>() const;
};

int main()
{
    EqMatcher<ConvertibleFromAny> em(1);
    Matcher<ConvertibleFromAny> m = em;

    return 0;
}

错误发生在 分配 声明

Matcher<ConvertibleFromAny> m = em;

并且错误消息是

error C2440: 'initializing': cannot convert from 'EqMatcher<ConvertibleFromAny>' to 'Matcher<ConvertibleFromAny>'
note: No constructor could take the …