声明中可能的大多数关键字
Most Keywords Possible In Declaration
纯粹出于好奇，我一直在想一个声明中可以容纳多少个关键字。假设模板不计算在内(因为是无限的)，我能想到的最长的模板是:
extern const unsigned long int i;
我也试着在那里放新的
我查了很多，但没有看到任何关于它的东西。只是为了好玩!
编辑- 因为这个问题太宽泛了，你可以为每个不同的关键字只使用一个关键字。没有例外。当然long long是一个完全合法的类型，我只是想知道有多少不同的类型可以一起使用。那么给定这个，一个声明可以容纳多少个关键字。可以是函数、成员函数或变量
你说的声明。下面是一个函数声明，总共有10个，顺序混乱:
int inline long constexpr volatile static unsigned const long foo() noexcept;
你可以用一个成员函数做12:
virtual int inline long constexpr volatile unsigned const long foo() const noexcept = delete;
我不知道你会怎么理解，但我相信这是一个有效的变量声明，不包括初始化的可能性(虽然不包括，但包括decltype是可疑的):
alignas(sizeof(decltype(typeid(const volatile unsigned long long int)))) static thread_local decltype(typeid(const volatile unsigned long long int).name()) foo{};
当无限重复的可能性如此之多的时候，很难知道该远离什么。例如，我的变量声明没有强制转换，这就是为什么我说允许decltype是有问题的:
int i;
decltype(const_cast<const int &>(const_cast<int &>(const_cast<const int &>(i)))) foo{i};
这里有一个实际上是无限的:
thread_local constexpr static const unsigned long long*
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