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Re: C/C++ timeline (was Re: Python: A Little Trick For Every Need)

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John Ames <commodorejohn@gmail.com> wrote or quoted:
>(Correction to my original remark: it looks like lambdas didn't make it
>into C23 after all...? I confess I lost track of the discussion at the
>time, as I haven't needed any new features in the language since C99
>added // comments, declare-anywhere, and stdint.h.)

  C++ has had lambdas for ages. Here's a code example from
  Sebastian Theophil's Cppcon talk from 2025. (The lambdas
  start with the square brackets.)

expected<double, string> parse_and_invert(string_view sv) {
  return parse_int(sv).transform(
    [](int n) { return n*2; }
  ).transform_error([](parse_error p) -> string {
    switch(p) {
      case parse_error::out_of_bounds:
        return "out of bounds";
      case parse_error::invalid_input:
        return "invalid_input";
    }
  }).and_then(
    [](int n) -> std::expected<double, std::string> {
      if(0==n) {
        return std::unexpected("division by zero");
      } else {
        return std::expected<double, std::string>(1.0/n);
      }
    });
}

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Re: C/C++ timeline (was Re: Python: A Little Trick For Every Need) ram@zedat.fu-berlin.de (Stefan Ram) - 2026-02-06 20:01 +0000
  Re: C/C++ timeline (was Re: Python: A Little Trick For Every Need) Bonita Montero <Bonita.Montero@gmail.com> - 2026-02-07 08:27 +0100

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