如何在实例化模板化的类类型时抛出错误？

#include <type_traits>

template <typename T>
class MyTemplateClass {
public:
    MyTemplateClass() {
        static_assert(std::is_integral<T>::value, "T must be an integral type");
    }
};

int main() {
    MyTemplateClass<int> validInstance; // 编译通过
    MyTemplateClass<double> invalidInstance; // 编译失败，显示错误消息
    return 0;
}

#include <stdexcept>

template <typename T>
class MyTemplateClass {
public:
    MyTemplateClass() {
        if (!std::is_integral<T>::value) {
            throw std::runtime_error("T must be an integral type");
        }
    }
};

int main() {
    try {
        MyTemplateClass<int> validInstance; // 运行正常
        MyTemplateClass<double> invalidInstance; // 抛出异常
    } catch (const std::runtime_error& e) {
        std::cerr << "Error: " << e.what() << std::endl;
    }
    return 0;
}