宣言中可能的大部分关键词

Question

纯粹出于好奇，我一直想知道有多少关键字可以适用于声明。 假设模板不算数（因为无穷大），我能想出的最长模板是：

extern const unsigned long int i;

我也试图在那里适应新的。

我看了一堆，但没有看到任何关于它的事情。只是为了好玩！

修改 - 由于这个问题过于宽泛，您只能为每个不同的关键字添加一次关键字。没有例外。当然，长期是一个完全合法的类型，我只想知道可以一起使用多少不同的类型。因此，在一个声明中可以容纳多少个关键字。可以是函数，成员函数或变量。

Answer 1

你说声明。这里有一个function declaration，其总数为10，其中包括踢球：

int inline long constexpr volatile static unsigned const long foo() noexcept;

您可以使用member function执行12次操作：

virtual int inline long constexpr volatile unsigned const long foo() const noexcept = delete;

我不知道你会怎么做，但我相信这是variable declaration的有效二十，不包括初始化的可能性（虽然不包括那个，但包括{ {1}}有问题）：

decltype

当有无数重复的可能性时，很难知道要远离什么。例如，我的变量声明没有强制转换，这就是我说允许alignas(sizeof(decltype(typeid(const volatile unsigned long long int)))) static thread_local decltype(typeid(const volatile unsigned long long int).name()) foo{}; 有问题的原因：

decltype

Answer 2

这是一个几乎无限的：

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