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Of course, not all of the features are supported by the current compiler selection and we are restricted in that sense.

For now we have

    "gcc": "9.0",
    "clang": "9.0",
    "apple_clang": "11.0.0",
    "msvc": {
      "year": "2019",
      "number": "16",
      "toolset": "142"

where the msvc compiler has version 19 and the currently tested minimum is 19.24.

So according to the compiler support page the few interesting, IMO, things are now available:

• constexpr try catch blocks
• Allow lambda-capture [=, this]
• Designated initializers
• Concepts (partial)
• init-statements for range-based for

and from the library:

• std::endian
• String prefix and suffix checking
• std::lerp() and std::midpoint()
• std::erase() and std::erase_if()

1. Feature description was added to the changelog