R Under development (unstable) (2024-05-24 r86611 ucrt) -- "Unsuffered Consequences"
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> 
> library(nanotime)
> 
> z <- RcppCCTZ:::parseDouble("1970-01-01T00:00:00.000000001+00:00")
> cat("z is: ")
z is: > print(z)
     [,1] [,2]
[1,]    0    1
> 
> x <- nanotime("1970-01-01T00:00:00.000000001+00:00")
> cat("x is: ")
x is: > print(x)
[1] 1970-01-01T00:00:00.000000001+00:00
> format(x)
[1] "1970-01-01T00:00:00.000000001+00:00"
> 
> cat("x+1 is: ")
x+1 is: > x <- x + 1
> print(x)
[1] 1970-01-01T00:00:00.000000002+00:00
> format(x)
[1] "1970-01-01T00:00:00.000000002+00:00"
> 
> cat("y is: ")
y is: > y <- nanotime(z)
> print(y)
[1] 1970-01-01T00:00:00.000000000+00:00 1970-01-01T00:00:00.000000001+00:00
> #print(class(y))
> format(y)
[1] "1970-01-01T00:00:00.000000000+00:00" "1970-01-01T00:00:00.000000001+00:00"
> 
> cat("y+1 is: ")
y+1 is: > y <- y + 1
> print(y)
[1] 1970-01-01T00:00:00.000000001+00:00 1970-01-01T00:00:00.000000002+00:00
> format(y)
[1] "1970-01-01T00:00:00.000000001+00:00" "1970-01-01T00:00:00.000000002+00:00"
> 
> print(x == y)
[1] FALSE  TRUE
> 
> od <- getOption("digits.secs")
> options("digits.secs"=6)
> as.POSIXct(x)
[1] "1970-01-01 01:00:00 CET"
> as.POSIXct(x+1000)
[1] "1970-01-01 01:00:00.000001 CET"
> as.POSIXlt(x)
[1] "1970-01-01 01:00:00 CET"
> as.POSIXlt(x+1000)
[1] "1970-01-01 01:00:00.000001 CET"
> as.Date(x)
[1] "1970-01-01"
> as.Date(x, tz="UTC")
[1] "1970-01-01"
> options("digits.secs"=od)
> 
> 
> y <- nanotime(1L)  # integer, may dispatch via nanotime.numeric
> print(y)
[1] 1970-01-01T00:00:00.000000001+00:00
> 
> y <- nanotime(1)   # numeric
> print(y)
[1] 1970-01-01T00:00:00.000000001+00:00
> 
> ## v <- nanotime:::nanotime.default(1)     # forced call, gets imprecise value
> ## print(v)
> 
> 
> options("nanotimeFormat"="%Y-%m-%d %H:%M:%S")
> format(x <- nanotime("1970-01-01 00:00:00"))
[1] "1970-01-01 00:00:00"
> 
> options("nanotimeFormat"="%Y-%m-%d %H:%M:%E*S")
> format(x <- nanotime("1970-01-01 00:00:00.123456789"))
[1] "1970-01-01 00:00:00.123456789"
> 
> options("nanotimeFormat"="%Y-%m-%d %H:%M:%E*S%Ez")   # default
> 
> cat("Done\n")
Done
> 
> proc.time()
   user  system elapsed 
   0.90    0.12    1.01