cannot parse edtf dates prior to 1000AD #35
Description
Even if the use of datetime was removed in favor of time_struct as mentioned here: #26
When parsing dates (both with the default parse_edtf or even by only using level0Expression the parsing is limited to 1000AD +. For example:
parse_edtf("576")
[...]
3...) W:(0123...) W:(0123...)} ^ {W:(0123...) "u" W:(0123...) W:(0123...)} ^ {W:(0123...) W:(0123...) "u" W:(0123...)} ^ {W:(0123...) W:(0123...) W:(0123...) "u"}}) "-" Combine:({01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 ^ Combine:({0u | 1u ^ {"u" W:(0123...)}})}) "-" Combine:({01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 ^ Combine:({{"u" W:(0123...)} ^ {W:(0123...) "u"}})})} ^ {Combine:({W:(0123...) ^ {~{"-0000"} "-" W:(0123...)}}) "-" Combine:({0u | 1u ^ {"u" W:(0123...)}}) "-" Combine:({01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 ^ Combine:({{"u" W:(0123...)} ^ {W:(0123...) "u"}})})} ^ {Combine:({W:(0123...) ^ {~{"-0000"} "-" W:(0123...)}}) "-" 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 "-" Combine:({{"u" W:(0123...)} ^ {W:(0123...) "u"}})}}}}} ^ {"y" Combine:({["-"] Combine:({W:(1234...) [W:(0123...)]...})}) "e" Combine:({W:(1234...) [W:(0123...)]...}) [{"p" Combine:({W:(1234...) [W:(0123...)]...})}]} ^ {{Combine:({W:(0123...) ^ {~{"-0000"} "-" W:(0123...)}}) "-" 21 | 22 | 23 | 24} "^" Re:('\\S')}}}, found end of text (at char 3), (line:1, col:4)The stack trace is humongous, therefore I'm not pasting it here. The bottom line (as far as I can tell) is because of the use of Combine. I'm debugging a bit more to try to figure out why and I'm happy to contribute with a fix. But I'd appreciate any help on further investigation :)