SAS date formats (YYMMDDxw) not converted

[andrewsali]

I have come upon SAS files where the date format string is not purely YYMMDD but a bit more detailed - YYMMDDN in my case. These are not converted to R dates by haven but left as doubles.

It appears that there are multiple date formats in SAS: http://support.sas.com/documentation/cdl/en/lrdict/64316/HTML/default/viewer.htm#a000589916.htm

However these extended ones are not considered:

haven/src/haven_types.h

Line 62 in 699b7c3

else if (format == "YYMMDD") return HAVEN_DATE;

Would it be possible to load these extended formats as dates as well?

[hadley]

Looks like we should switch to hasPrefix() here because all of the date formats can be followed by optional parameters.

[lock]

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