VS2019 16.3.8编译时语言环境错误

Question

我的VS2019今天早上更新，现在xlocbuf库中有18个编译器错误； xlocbuf内部标头（来自locale），我什至都不直接使用。

除了可能#include序列问题外，网上几乎没有其他内容；我更改了#include顺序，但没有发生错误。

VS2019 version 16.3.8

Severity    Code    Description Project File    Line    Suppression State
Error   C2144   syntax error: 'unknown-type' should be preceded by '('      C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xlocbuf 221 
Error   C2062   type 'unknown-type' unexpected      C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xlocbuf 221 
Error   C2144   syntax error: 'unknown-type' should be preceded by '('      C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xlocbuf 216 
Error   C2062   type 'unknown-type' unexpected      C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xlocbuf 216 
Error   C2589   '=': illegal token on right side of '::'        C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xlocbuf 221 
Error   C2589   '=': illegal token on right side of '::'        C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xlocbuf 216 
Error   C2144   syntax error: 'unknown-type' should be preceded by '('      C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xlocbuf 221 
Error   C2062   type 'unknown-type' unexpected      C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xlocbuf 221 
Error   C2144   syntax error: 'unknown-type' should be preceded by '('      C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xlocbuf 216 
Error   C2062   type 'unknown-type' unexpected      C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xlocbuf 216 
Error   C2589   '=': illegal token on right side of '::'        C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xlocbuf 221 
Error   C2589   '=': illegal token on right side of '::'        C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xlocbuf 216 
Error   C2144   syntax error: 'unknown-type' should be preceded by '('      C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xlocbuf 221 
Error   C2062   type 'unknown-type' unexpected      C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xlocbuf 221 
Error   C2144   syntax error: 'unknown-type' should be preceded by '('      C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xlocbuf 216 
Error   C2062   type 'unknown-type' unexpected      C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xlocbuf 216 
Error   C2589   '=': illegal token on right side of '::'        C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xlocbuf 221 
Error   C2589   '=': illegal token on right side of '::'        C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.23.28105\include\xlocbuf 216 

文件系统也有错误-我认为解决xlocbuf所存在的问题也将解决文件系统问题。我把这个问题集中在xlocbuf上，因为我什至不使用那个库。

没有下面的代码行就不会有错误，仅由#include <filesystem>本身就会产生错误

#include <filesystem>
namespace fs = filesystem;

void read_batch( ) { 
    string path = "batch_in/"; 
    for (const auto& entry : fs::directory_iterator(path) ) { 
        read(entry.path().string() ); 
        cout << entry.path() << endl; 
    } 
}

Answer 1

*警告：卢克史派克和他的兄弟*

在注释掉文件系统行并进行编译然后取消注释和编译时，它是否已编译？

首先，出现链接器错误。然后再次编译时，链接器错误消失了？

IDK。不要问不在乎现在可以了！