VS2017: E0135 namespace “std” has no member “filesystem”

问题

In order to use: std::filesystem from the C++17 library, my project was migrated from vs2015 to vs2017.

My project compiles and runs without error, the lib is included without error, but when trying to use std::filesystem I get the following:

It seems the library is not being included but cant see why not?

Edit:

Microsoft Visual Studio Enterprise 2017

VisualStudio.15.Release/15.7.3+27703.2026

Visual C++ 2017 00369-90000-00000-AA466

Microsoft Visual C++ 2017

回答1:

A couple of options to investigate.

• Check the language standard. You need C++17 or above:
• If your version of visual studio doesn't support std::filesystem yet, you can try std::experimental::filesystem.

I have the following version and std::filesystem works (with the C++17 language selection shown above):

Microsoft Visual Studio Community 2017 Preview
Version 15.8.0 Preview 1.1
VisualStudio.15.Preview/15.8.0-pre.1.1+27705.2000

来源：https://stackoverflow.com/questions/50668814/vs2017-e0135-namespace-std-has-no-member-filesystem