std::vector 与 array[number] 相同吗? [英] is std::vector same as array[number]?

问题描述

可能的重复:
是否保证 std::vector 元素是连续的?

std::vector 是否总是将连续内存地址中的数据包含为数组[编号]?

does std::vector always contain the data in sequential memory addresses as array[number]?

推荐答案

对于除 bool 之外的所有类型，标准要求元素在内存中是连续的:

For all types except bool, the standard requires the elements are contiguous in memory:

23.2.4/1 ... 向量的元素是连续存储的，这意味着如果 v 是一个向量，其中 T 是 bool 以外的某种类型，那么它遵循恒等式 &v[n] == &v[0] + n 对于所有 0 <= n

23.2.4/1 ... The elements of a vector are stored contiguously, meaning that if v is a vector where T is some type other than bool, then it obeys the identity &v[n] == &v[0] + n for all 0 <= n < v.size()

请记住，std::vector 有特殊要求，与 bool 数组不同.

Do keep in mind that std::vector<bool> has special requirements and is not the same as an array of bool.

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