如何在 VScode 中包含 C++20 模块

如何解决如何在 VScode 中包含 C++20 模块

我正在用 VScode 编写 c++20。我的配置如下：

c_cpp_properties.json

{
    "configurations": [
        {
            "name": "Mac","includePath": [
                "${workspaceFolder}/**"
            ],"defines": [],"macFrameworkPath": [
                "/Library/Developer/CommandLinetools/SDKs/MacOSX.sdk/System/Library/Frameworks"
            ],"compilerPath": "/usr/local/Cellar/gcc/10.2.0/bin/g++-10","cStandard": "c11","cppStandard": "c++20","intelliSenseMode": "clang-x64"
        }
    ],"version": 4
}

tasks.json：

{
    "version": "2.0.0","tasks": [
        {
            "type": "cppbuild","label": "C/C++: clang++ build active file","command": "/usr/local/Cellar/gcc/10.2.0/bin/g++-10","args": [
                "-g","-pthread","-std=c++20","-I/usr/local/Cellar/gcc/10.2.0/include","-I/usr/local/Cellar/fmt/7.1.3/include","${file}","-o","${fileDirname}/${fileBasenameNoExtension}"
            ],"options": {
                "cwd": "${workspaceFolder}"
            },"problemmatcher": [
                "$gcc"
            ],"group": {
                "kind": "build","isDefault": true
            },"detail": "Task generated by Debugger."
        }
    ]
}

一切看起来都很好，直到我尝试使用 C++20 中引入的 syncstream。

当我运行 #include <syncstream> 时，编译器总是给我错误：

Fatal error: syncstream: No such file or directory
    5 | #include <syncstream>
      |          ^~~~~~~~~~~~
compilation terminated.

我想知道我应该如何在我的 vscode 中进行配置，以便编译器可以使用 C++20 模块？

解决方法

请参阅 https://en.cppreference.com/w/cpp/compiler_support#C.2B.2B20_library_features 处的“同步缓冲 ostream”

你需要 libstdc++11。您的编译器 (g++10) 尚不支持 syncstream。