c++ - C++ draft中的word pack是什么？

Question

C++ 标准草案中的pack 是什么意思[basic]p3 ？如果不能用精确的术语解释，你能给出一些具体的解释吗？

An entity is a value, object, reference, structured binding, function, enumerator, type, class member, bit-field, template, template specialization, namespace, or pack.

Answer 1

该标准还有一个 index如果我们在索引中搜索 pack，我们会得到以下 entry for pack :

pack, [temp.variadic]

导致[temp.variadic]p4其中说:

A pack is a template parameter pack, a function parameter pack, or an init-capture pack. The number of elements of a template parameter pack or a function parameter pack is the number of arguments provided for the parameter pack. The number of elements of an init-capture pack is the number of elements in the pack expansion of its initializer.