What can C++ do that Rust can’t? (2021 edition)

• C++ Format

  161 19,307 9.8 C++

  A modern formatting library

  

Yes, mentioned in the features here: https://github.com/fmtlib/fmt

• staticvec

  10 267 4.9 Rust

  Implements a fixed-capacity stack-allocated Vec alternative backed by an array, using const generics.

The lack of decltype-esque functionality has consequences that are far-reaching enough to be worthy of more than a throwaway mention, IMO. See this ongoing issue for a crate of mine, for example.

• InfluxDB

  www.influxdata.com sponsored

  Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

  

• compile-time-regular-expressions

  26 3,157 7.5 C++

  Compile Time Regular Expression in C++

There is also https://github.com/hanickadot/compile-time-regular-expressions that is written by one of the cpp committee and is meant to be almost as fast burntsushi's regex lib.

• rust

  2,682 92,831 10.0 Rust

  Empowering everyone to build reliable and efficient software.

  

mostly this issue https://github.com/rust-lang/rust/issues/39412

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