哪个是正确的:vector< const string>或const vector< string>吗? [英] Which is correct: vector<const string> OR const vector<string>?

问题描述

哪个是正确的: vector< const string> 或 const vector< string>?

我想创建一个 std :: string s的 std :: vector ，并且我不会对其进行更改.但是我不确定这两种方式中哪种更好，为什么呢.

I want to create an std::vector of std::strings, and I won't make changes to it. But I am not sure which of the two ways is better and why.

推荐答案

如果您的唯一选择是这两个，并且希望编译程序，请使用 const std :: vector< std :: string> .

If your only choices are those two and you want the program to compile, use const std::vector<std::string>.

如果您不介意编译错误(在 GCC4.8 和 Clang )，可能是由于 const std :: string 不符合 CopyAssignable (在C ++ 11之前)的要求，或者 MoveAssignable (自C ++ 11起)，即使 Destructible ，请使用 std :: vector< conststd :: string> .

If you don't mind compilation errors (both on GCC4.8 and Clang), probably due to the fact that const std::string does not meet the requirement of CopyAssignable (prior to C++11) or MoveAssignable (since C++11), even though, apparently, it's mostly because it's not Destructible, use std::vector<const std::string>.

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