Code for testing plyr dll loading

test.r

# Initial setup ================================
# Start new R session
install.packages('plyr')

library(plyr)
packageVersion('plyr')           # Should be 1.7.1
# Should throw error because function isn't exported in 1.7.1
split_indices(c(1L, 1L, 2L), 2L)


# Restart R session
library(devtools)
# Install updated version of plyr
setwd('Z:/Dropbox/Projects/plyr')
install()
# or install_github("plyr", ref = "plyr-1.8-rc")
# Will print a warning installing DLL


# Crashing with DLL mismatch ================================

# Restart R session
library(plyr)
packageVersion('plyr')           # Should be 1.8
split_indices(c(1L, 1L, 2L), 2L) # Should crash

# Now you can modify the C code, and re-install
setwd('Z:/Dropbox/Projects/plyr')
install()

# To test any changes, restart R and run split_indices() code from above


# Overwriting the DLL ================================

# Restart R
library(devtools)
setwd('Z:/Dropbox/Projects/plyr')
unload()    # This will unload the plyr DLL
install()   # Now install will not have a problem overwriting the DLL


# Restart R session
library(plyr)
split_indices(c(1L, 1L, 2L), 2L) # Should not crash

# At this point, you can try different versions of the C code and see if it
# crashes. Any time you make a change, you must use unload(), then install().