C++ features

• https://devdocs.io/cpp/23
• https://en.wikipedia.org/wiki/C%2B%2B23
• https://en.wikipedia.org/wiki/C%2B%2B20
• https://en.wikipedia.org/wiki/C%2B%2B17
• https://turpin.one/posts/fav.html
• https://turpin.one/posts/cpp-features.html

C++23

See the presentation by Marc Gregoire (CppCon 2022).

• Multidimensional array operator: data[x, y, z] and std::mdspan
• Deducing this (wtf)
• constevel -- immediate functions: only execute at compile time
• uz literals
• Unicode assigned name
• std::print
• import std; -- modules
• New container adapters: std::flat_map std::flat_set
• A standard coroutine generator defined in <generator>
• basic_string::contains()
• .contains for strings and containers | 23 |
• <stack_trace>
• std::expected
• std::byteswap
• extended constexpr for optional and variant

std::ranges

• starts_with()
• shift_left()
• ranges::to
• find_if
• contains
• contains_subrange
• fold_left

std::views

• zip
• adjacent
• pairwise
• chunk
• slide
• chunk_by
• join_with
• stride -- take every nth element
• repeat
• iota -- infinite views may be more performant as no boundary check

What's missing?

In the standard but not supported yet.

• ranges::to
• <print>

C++20

• ranges and views (part one)
• .contains for maps
• .starts_with for strings

Big news but haven't tried them

• coroutines
• modules
• concepts

C++17

• Structured bindings
• Execution policy (although slow to be supported)
• std::filesystem
• std::string_view
• std::clamp

C++11

• Range-based for loops
• Brace initialisers
• constexpr (catching UB)