Closes #1315. as.list.IDate works as intended.

R/IDateTime.R

@@ -24,12 +24,14 @@ seq.IDate <-
 c.IDate <-
 rep.IDate <-
 split.IDate <-
-as.list.IDate <-
 unique.IDate <-
     function(x, ...) {
         as.IDate(NextMethod())
     }
 
+# fix for #1315
+as.list.IDate <- function(x, ...) NextMethod()
+
 # rounding -- good for graphing / subsetting
 ## round.IDate <- function (x, digits, units=digits, ...) {
 ##     if (missing(digits)) digits <- units # workaround to provide a units argument to match the round generic and round.POSIXt

README.md

@@ -252,6 +252,8 @@
 
   66. Evaluating quoted expressions with `.` in `by` works as intended. That is, `dt = data.table(a=c(1,1,2,2), b=1:4); expr=quote(.(a)); dt[, sum(b), eval(expr)]` works now. Closes [#1298](https://github.com/Rdatatable/data.table/issues/1298). Thanks @eddi.
 
+  67. `as.list` method for `IDate` object works properly. Closes [#1315](https://github.com/Rdatatable/data.table/issues/1315). Thanks to @gwerbin.
+
 #### NOTES
 
   1. Clearer explanation of what `duplicated()` does (borrowed from base). Thanks to @matthieugomez for pointing out. Closes [#872](https://github.com/Rdatatable/data.table/issues/872).

inst/tests/tests.Rraw

@@ -6974,6 +6974,11 @@ d = data.table(a = 1)
 q = quote(.(a))
 test(1561, d[, 1, by = eval(q)], d[, 1, by = .(a)])
 
+# Fix for #1315
+d = as.IDate(seq(as.Date("2015-01-01"), as.Date("2015-01-15"), by='1 day'))
+test(1562.1, as.list(d), lapply(as.list(as.Date(d)), as.IDate))
+test(1562.2, sapply(d, identity), as.integer(sapply(as.Date(d), identity)))
+
 ##########################