C标准使用以下语言： 6.5.3.4 The sizeof and _Alignof operators Semantics The sizeof operator yields the size (in bytes) of its operand, which may be an expression or the parenthesized name of a type. The size is determined from the type of the operand. The result ...

All standard references below refers to the current ISO Standard Working Draft, generated on 2020-06-22. [dcl.fct]/18 states that [extract, emphasis mine]: 缩写函数模板是具有一个或多个通用参数类型占位符（[dcl.spec.auto]）的函数声明。缩写功能模板等效于功能模板（[temp.fct]），其模板参数列表按外观顺序针对功能声明的每个通用参数类型占...

(This question is a branch-out from the discussion in the comments of Template specialization of variable template and type deduction.) [temp.expl.spec]/10 states that [emphasis mine]: A trailing template-argument can be left unspecified in the te...

[expr.unary.noexcept]的措辞在C ++ 20中已更改。 Previously (n4140, 5.3.7 noexcept operator [expr.unary.noexcept]), my emphasis: 如果在可能评估的上下文中表达式包含以下内容，则noexcept运算符的结果为false           （3.1）对函数，成员函数的潜在评估调用，     函数指针或不具有成员的成员函数指针     非抛出异常规范（[except.spec]），除非调用     是一个常...

Pardon my ignorance, it appears to me that std::array is meant to be an STL replacement for your regular arrays. But because the array size has to be passed as a template parameter, it prevents us from creating std::array with a size known only at runtime....