How to enable C++17 support in VSCode C++ Extension

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This has become much easier now. Search for cppstandard in your vs code extension settings and choose the version of C++ you want the extension to use from the drop down.

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In order to make sure your debugger is using the same version, make sure you have something like this for your tasks.json, where the important lines are the --std and the line after that defines the version.

{
  "tasks": [
    {
      "type": "cppbuild",
      "label": "C/C++: g++ build active file",
      "command": "/usr/bin/g++",
      "args": [
        "-std=c++17",
        "-I",
        "${fileDirname}",
        "-g",
        "${fileDirname}/*.cpp",
        "-o",
        "${workspaceFolder}/out/${fileBasenameNoExtension}.o"
      ],
      "options": {
        "cwd": "${workspaceFolder}"
      },
      "problemMatcher": ["$gcc"],
      "group": {
        "kind": "build",
        "isDefault": true
      }
    }
  ],
  "version": "2.0.0"
}

Note that if you’re copying the above tasks.json directly, you’ll need to have a folder named out in your workspace root.

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