Add support for RFC2822

[rypervenche]

Adding support for RFC2822 as per https://tools.ietf.org/html/rfc2822#section-3.3.

[zerodogg]

Useful. Sort of. I just implemented the exact same thing and was about to submit a pull request. Serves me right for not checking existing ones. Anyhoo, could this be merged? It's quite useful - in my case for parsing dates in RSS feeds.

[zerodogg]

@rypervenche your implementation breaks when DateTime::Timezones is in use.

[1 zerodogg@mal ~]+$ raku -MDateTime::Parse -e 'say DateTime::Parse.new("Tue, 08 Sep 2020 14:11:48 +0230")'                                                            
2020-09-08T14:11:48Z
[0 zerodogg@mal ~]+$ raku -MDateTime::Timezones -MDateTime::Parse -e 'say DateTime::Parse.new("Tue, 08 Sep 2020 14:11:48 +0230")'
This type cannot unbox to a native integer: P6opaque, Str
  in method <anon> at /var/home/zerodogg/.raku/sources/3B675F5F3A9B8F11C18AE4B193F9F53345002C31 (DateTime::Timezones) line 120
  in method rfc2822-date at /var/home/zerodogg/.raku/sources/703635D3023B1FE6D98BF2600452B9BCA55789BB (DateTime::Parse) line 173
  in regex rfc2822-date at /var/home/zerodogg/.raku/sources/703635D3023B1FE6D98BF2600452B9BCA55789BB (DateTime::Parse) line 70
  in regex TOP at /var/home/zerodogg/.raku/sources/703635D3023B1FE6D98BF2600452B9BCA55789BB (DateTime::Parse) line 8
  in method new at /var/home/zerodogg/.raku/sources/703635D3023B1FE6D98BF2600452B9BCA55789BB (DateTime::Parse) line 307
  in block <unit> at -e line 1

Using non-RFC2822 works, however:

[0 zerodogg@mal ~]+$ raku -MDateTime::Timezones -MDateTime::Parse -e 'say DateTime::Parse.new("Tue, 08 Sep 2020 14:11:48 GMT")' 
2020-09-08T14:11:48Z

[zerodogg]

@alabamenhu do you have any idea what is going on here -^ ?

[alabamenhu]

@alabamenhu do you have any idea what is going on here -^ ?

This should be resolved now with DateTime::Timezones:ver<0.3.2> More details in alabamenhu/DateTimeTimezones#2 . Let me know if it works okay and I'll package up a release too

[zerodogg]

@alabamenhu That fixed it, cheers!

[sergot]

I've just merged some old PRs and I wanted to merge this, but there are conflicts, could you please take a look @rypervenche ?

[sergot]

Or if you @zerodogg or @alabamenhu want to create a new PR for that, I'll be forever grateful :)