D-like ranges for C++17 in a 2.5 klines single header file

[claptrap]

On Tuesday, 13 October 2020 at 10:33:05 UTC, user1234 wrote:
> On Tuesday, 13 October 2020 at 09:12:58 UTC, Per Nordlöw wrote:
>> Here's a more compact encoding of D/C++20-like ranges packed 
>> into a 2.5 klines single header file:
>>
>> The file `ranges.hpp` syntaxcheck in 0.3s with Clang 10 on 
>> Ubuntu 20.04 on my 6 year old laptop.
>>
>> https://github.com/simonask/rx-ranges/
>
> compared to std.range or std.algorithm it is very unpleasant to 
> read.

And that's "simpler ranges"... how bad are the ones he thinks are 
too complicated?