parser problem in R2.15.2 and updated packages?

[cyrus621]

Last year there was the issue https://github.com/yihui/knitr/issues/18 where running knitR with highlight=TRUE resulted in the error:

Error in match(data$token, grammar_symbols$token) : 
  object 'grammar_symbols' not found

I have been using knitr w/o problems but now after updating to R2.15.2 and the latest packages I get the same problem. Code compiles with highlight=FALSE but not =TRUE

In the .Rnw source:

opts_knit$set(...., highlight=TRUE)  ## gives the above error
opts_knit$set(...., highlight=FALSE) ## no error but code does not format correctly

versions (all up-to-date via update.packages(dependencies=TRUE):

> version
               _                            
platform       x86_64-apple-darwin9.8.0     
arch           x86_64                       
os             darwin9.8.0                  
system         x86_64, darwin9.8.0          
status                                      
major          2                            
minor          15.2                         
year           2012                         
month          10                           
day            26                           
svn rev        61015                        
language       R                            
version.string R version 2.15.2 (2012-10-26)
nickname       Trick or Treat  

> 
> help(package="knitr")$info[[1]][4]
[1] "Version:            0.9"
> help(package="parser")$info[[1]][4]
[1] "Version:            0.1"
> help(package="formatR")$info[[1]][4]
[1] "Version:            0.7"

[yihui]

This should not be an issue of the formatR package, since it no longer depends on parser. I do not know what happened in the current version of the parser package, but I think this issue can be solved by library(parser). In future (after R 3.0.0 comes out) the dependencies on highlight and parser will be completely removed, and knitr will support native syntax highlighting.

[cyrus621]

谢先生，thanks so much! Yes, that solved the problem. I suppose forcing parser to load (I used require rather than library) was necessary because formatR does not load parser any more.

Thanks so much for this wonderful package!! I was a loyal Sweave user, many thanks to Leisch for leading the way, but your solution is much more elegant. I converted with about one day of trial and error.

[yihui]

Glad to know the problem was solved, and thanks for the kind words :smiley: