Hi,
I have a feature request for 'parse', and possibly the 'R CMD INSTALL'
command to display more informative error information. Specifically,
after making several modifications to a package on my system (the
package name is irrelevant; I'm using R 2.3.1 on Debian):
$ R CMD INSTALL seas
* Installing *source* package 'seas' ...
** R
** data
** inst
** preparing package for lazy loading
Error in parse(file, n, text, prompt) : syntax error at
1222: ylim <-
1223: else
Execution halted
ERROR: lazy loading failed for package 'seas'
** Removing '/usr/local/lib/R/site-library/seas'
Of the 24 or so *.R source files in the edited package, I'm not sure
where I had made the syntax error, but it would be very nice to see an
error message that says something more helpful, such as "Error in
parse(file, n, text, prompt) : syntax error in function 'foo' at ...".
Is it possible for 'parse' to display the parent function name in which
the error occurred? As for 'R CMD INSTALL' goes, I realize that all the
*.R files are cat'ed together, then parsed as one file, so it is
difficult report a file name and line number(s). Is this concatenating
necessary? Or couldn't the individual files be parsed (and errors/line
#'s reported for offending files), then combined in an environment for
the INSTALL'ed package?
In the mean time, my solution to find the offending file is:
for(i in dir(pattern=".R$")){
print(i)
parse(i)
}
Thanks,
+mt
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