Automatic indexing POSIXct

[gsee]

I get an error when I try to subset a .POSIXct column when auto indexing is turned on.

library(data.table)
#data.table 1.9.5  For help type: ?data.table
#*** NB: by=.EACHI is now explicit. See README to restore previous behaviour.

options(datatable.auto.index=FALSE)  # Have to turn off to avoid error.
DT <- data.table(Time=.POSIXct(0, tz="UTC")+0:1, Value=1:2)
DT[Time==Time[1]]
#         Time Value
#1: 1970-01-01     1
DT[Time==.POSIXct(0, tz="UTC")]
#         Time Value
#1: 1970-01-01     1

options(datatable.auto.index=TRUE)
DT[Time==Time[1]]
#Error in UseMethod("as.data.table") : 
#  no applicable method for 'as.data.table' applied to an object of class "c('POSIXct', 'POSIXt')"
DT[Time==.POSIXct(0, tz="UTC")]
#Error in UseMethod("as.data.table") : 
#  no applicable method for 'as.data.table' applied to an object of class "c('POSIXct', 'POSIXt')"

sessionInfo()
#R version 3.1.1 (2014-07-10)
#Platform: x86_64-pc-linux-gnu (64-bit)
#
#locale:
#  [1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C         LC_TIME=C            LC_COLLATE=C        
#[5] LC_MONETARY=C        LC_MESSAGES=C        LC_PAPER=C           LC_NAME=C           
#[9] LC_ADDRESS=C         LC_TELEPHONE=C       LC_MEASUREMENT=C     LC_IDENTIFICATION=C 
#
#attached base packages:
#  [1] stats     graphics  grDevices utils     datasets  methods   base     
#
#other attached packages:
#  [1] data.table_1.9.5
#
#loaded via a namespace (and not attached):
#  [1] chron_2.3-45 tools_3.1.1 

[arunsrinivasan]

Jan's PR for #969 fixes this. Will add tests and close.