C++ is not done yet.

• Reflection on language constructs.
• Programmatically inject code.
• Scoped and typesafe expressions expansion (hygienic macros).
• Starting and controlling child processes.
• A framework for asynchrony and heterogeneous programming (S/R).
• A standard executor to make asynchrony available out of the box.
• Fixed-sized non-allocating coroutines and deferred layouts.
• More ergonomic coroutines APIs.
• Guaranteed tail calls.
• Mapping of system memory and files.
• More user-friendly Pseudo Random Number Generators.
• Library support for SIMD.
• SIMD algorithms.
• Parallel algorithms for ranges.
• Asynchronous Networking facilities.
• Parallel execution and executors integration.
• Small buffer optimization for std::vector.
• Open addressing hash map and set.
• Unicode algorithms.
• Unicode properties.
• Tailored Unicode algorithms.
• Unicode/BCP 47 locales.
• Collation.
• cldr-compliant localized date formatting.
• cldr-compliant localized number formatting.
• User-friendly encoding conversions.
• A generic facility to get the extent of an array.
• constexpr formatting.
• Expressions in static_assert messages.
• Compile time assertions.
• Contracts (assertions).
• Non-throwing default allocator.
• Terser lambda syntax.
• Language construct for std::forward.
• Pack indexing.
• Pack as members.
• Non-trailing packs deduction.
• Universal template parameters.
• First-class support for Customization Points Objects, Niebloids and Overload Sets.
• Trees and ropes types.
• Improving the inserter interface for maps and sets.
• Concepts and variable templates as template parameters.
• A better from_chars interface.
• Template argument deduction for return types.
• views::enumerate.
• Threads should have a name.
• Replace initializer_list with language tuples.
• A strong int8_t type.
• Getting rid of std::locale.
• Getting rid of char_traits.
• Embedding resources in source files.
• Container rellocation.
• optional<T&>.
• Uninitialized vector.
• constexpr warnings.
• More implicit noexcept.
• Structured bindings in constexpr contexts.
• More formatting support for library types.
• u8/u16/u32 support in std::format.
• char* ⬄ char8_t* casting.
• Better hashing facilities.
• Correctly rounded floating points functions.
• Regular void
• Fixing ADL.
• Two phases parsing.
• Breaking ABI.
• A pipeline operator for improved ranges and sender/receiver code usability.
• Views and iterators facades.
• null-terminated string views.
• Phasing out null-terminated string interfaces.
• Max buffer size for to_chars.
• Elastic integers.
• Safe overflow/saturating functions.
• Fixing std::vector<bool>
• A replacement for std::bitset.
• ranges::to support for fixed-size arrays.
• Improving the freestanding and embedded platforms story.
• Make more friends hidden to improve compile times and diagnostics.
• Improve the helpfulness of compilation errors.
• Nested structured bindings.
• Pattern matching.
• Unused variable placeholder.
• Efficient, compile-time checked, Unicode compliant regexes.
• More ergonomic allocators.
• Better error management facilities.
• Language or library support for enum bit flags.
• An easier way to construct explicit types in range pipelines.
• Fast binary I/O separate from text facilities.
• Improve the usability of pointer to members.
• A set of replacement functions for volatile.
• Generalized = delete.
• Generalized using.
• ABI resilience features.