R devel - Oct 2001 - Bug when trying to save a character vector with an embedded / (PR#1115)

Here is an example involving "VIA\B".
> version
         _                   
platform sparc-sun-solaris2.6
arch     sparc               
os       solaris2.6          
system   sparc, solaris2.6   
status                       
major    1                   
minor    3.0                 
year     2001                
month    06                  
day      22                  
language R                   
> ls()
character(0)
> test <- "VIA\\B"	# I proceed the \ with another to escape it.
> cat(test, "\n")
VIA\B			# This is how the string should look.
> save(test, ascii = TRUE, file = "here")
> remove(list = ls())
> ls()
character(0)
> load("here")
> ls()
[1] "test"
> cat(test, "\n")
VIAB		# This is not how the string should look! Where did the \ go?
 
> unlink("here")

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a296180@mica.fmr.com writes:
> VIA\B			# This is how the string should look.
> > save(test, ascii = TRUE, file = "here")
> > remove(list = ls())
> > ls()
> character(0)
> > load("here")
> > ls()
> [1] "test"
> > cat(test, "\n")
> VIAB		# This is not how the string should look! Where did the \ go?
Fixed now for r-devel. Will commit shortly.

(Martin, here's a way to test all characters:

 x <- y <- unlist(as.list(
   parse(text=paste("\"\\",
         as.character(structure(0:255,class="octmode")),
         "\"",sep=""))))
 save(x, ascii=T, file="here")
 load("here")
 all(x==y)

- I'd commit it for the regression test suite, but I'm not sure what
our conventions are for temporary files)

BTW: printing and deparsing x and y causes display corruption. Perhaps
we should have an isprint somewhere? 

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard@biostat.ku.dk)             FAX: (+45) 35327907
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