R devel - Jan 2015 - gsub with perl=TRUE results in 'this version of PCRE is not compiled with Unicode property support' in R-devel

The following code:

res <- gsub("(*UCP)\\b(i)\\b", 
    "", "nhgrimelanomaclass", perl = TRUE)

results in:

Error in gsub(sprintf("(*UCP)\\b(%s)\\b", "i"),
"", "nhgrimelanomaclass",  :
  invalid regular expression '(*UCP)\b(i)\b'
In addition: Warning message:
In gsub(sprintf("(*UCP)\\b(%s)\\b", "i"), "",
"nhgrimelanomaclass",  :
  PCRE pattern compilation error
	'this version of PCRE is not compiled with Unicode property support'
	at '(*UCP)\b(i)\b'

on

R Under development (unstable) (2015-01-01 r67290)
Platform: x86_64-apple-darwin13.4.0 (64-bit)
Running under: OS X 10.9.5 (Mavericks)

locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base 

And also on the same version of R-devel on Snow Leopard, Windows, and Linux. But
it does not produce an error on

R version 3.1.2 (2014-10-31)
Platform: x86_64-apple-darwin13.4.0 (64-bit)

locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

Dan

Why are you reporting that your PCRE library does not have something 
which the R-admin manual says it should preferably have?  To wit, 
footnote 37 says

'and not PCRE2, which started at version 10.0. PCRE must be built with 
UTF-8 support (not the default) and support for Unicode properties is 
assumed by some R packages. Neither are tested by configure. JIT support 
is desirable.'

That certainly does not fail on my Linux, Windows and OS X builds of 
R-devel.  (Issues about pre-built binaries, if that is what you used, 
should be reported to their maintainers, not here.)

And the help does say in ?regex

      In UTF-8 mode, some Unicode properties may be supported via
      ?\p{xx}? and ?\P{xx}? which match characters with and without
      property ?xx? respectively.

Note the 'may'.




On 07/01/2015 23:25, Dan Tenenbaum wrote:
> The following code:
>
> res <- gsub("(*UCP)\\b(i)\\b",
>      "", "nhgrimelanomaclass", perl = TRUE)
>
> results in:
>
> Error in gsub(sprintf("(*UCP)\\b(%s)\\b", "i"),
"", "nhgrimelanomaclass",  :
>    invalid regular expression '(*UCP)\b(i)\b'
> In addition: Warning message:
> In gsub(sprintf("(*UCP)\\b(%s)\\b", "i"), "",
"nhgrimelanomaclass",  :
>    PCRE pattern compilation error
> 	'this version of PCRE is not compiled with Unicode property
support'
> 	at '(*UCP)\b(i)\b'
>
> on
>
> R Under development (unstable) (2015-01-01 r67290)
> Platform: x86_64-apple-darwin13.4.0 (64-bit)
> Running under: OS X 10.9.5 (Mavericks)
>
> locale:
> [1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8
>
> attached base packages:
> [1] stats     graphics  grDevices utils     datasets  methods   base
>
> And also on the same version of R-devel on Snow Leopard, Windows, and
Linux. But it does not produce an error on
>
> R version 3.1.2 (2014-10-31)
> Platform: x86_64-apple-darwin13.4.0 (64-bit)
>
> locale:
> [1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8
>
> attached base packages:
> [1] stats     graphics  grDevices utils     datasets  methods   base
>
> Dan
>
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
>

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Emeritus Professor of Applied Statistics, University of Oxford
1 South Parks Road, Oxford OX1 3TG, UK

Dan, for OS X, there is a new pcre library posted at
http://r.research.att.com/libs/ with a date stamp of Dec 28.  This fixes
this problem.  You can test for this by running
  make check
post compilation.  It'll bang out with a failure if this is not in order.

(And I know that all of this is described in R-admin).

It would be helpful (time saving) if a message is posted to r-sig-mac
whenever a new (version of a) library is added to
http://r.research.att.com/libs/
I know it is adding more work to the helpful people who are doing all the
heavy lifting.

Kasper

On Thu, Jan 8, 2015 at 7:06 AM, Prof Brian Ripley <ripley at
stats.ox.ac.uk>
wrote:
> Why are you reporting that your PCRE library does not have something which
> the R-admin manual says it should preferably have?  To wit, footnote 37
says
>
> 'and not PCRE2, which started at version 10.0. PCRE must be built with
> UTF-8 support (not the default) and support for Unicode properties is
> assumed by some R packages. Neither are tested by configure. JIT support is
> desirable.'
>
> That certainly does not fail on my Linux, Windows and OS X builds of
> R-devel.  (Issues about pre-built binaries, if that is what you used,
> should be reported to their maintainers, not here.)
>
> And the help does say in ?regex
>
>      In UTF-8 mode, some Unicode properties may be supported via
>      ?\p{xx}? and ?\P{xx}? which match characters with and without
>      property ?xx? respectively.
>
> Note the 'may'.
>
>
>
>
>
> On 07/01/2015 23:25, Dan Tenenbaum wrote:
>
>> The following code:
>>
>> res <- gsub("(*UCP)\\b(i)\\b",
>>      "", "nhgrimelanomaclass", perl = TRUE)
>>
>> results in:
>>
>> Error in gsub(sprintf("(*UCP)\\b(%s)\\b", "i"),
"",
>> "nhgrimelanomaclass",  :
>>    invalid regular expression '(*UCP)\b(i)\b'
>> In addition: Warning message:
>> In gsub(sprintf("(*UCP)\\b(%s)\\b", "i"),
"", "nhgrimelanomaclass",  :
>>    PCRE pattern compilation error
>>         'this version of PCRE is not compiled with Unicode property
>> support'
>>         at '(*UCP)\b(i)\b'
>>
>> on
>>
>> R Under development (unstable) (2015-01-01 r67290)
>> Platform: x86_64-apple-darwin13.4.0 (64-bit)
>> Running under: OS X 10.9.5 (Mavericks)
>>
>> locale:
>> [1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8
>>
>> attached base packages:
>> [1] stats     graphics  grDevices utils     datasets  methods   base
>>
>> And also on the same version of R-devel on Snow Leopard, Windows, and
>> Linux. But it does not produce an error on
>>
>> R version 3.1.2 (2014-10-31)
>> Platform: x86_64-apple-darwin13.4.0 (64-bit)
>>
>> locale:
>> [1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8
>>
>> attached base packages:
>> [1] stats     graphics  grDevices utils     datasets  methods   base
>>
>> Dan
>>
>> ______________________________________________
>> R-devel at r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-devel
>>
>>
>
> --
> Brian D. Ripley,                  ripley at stats.ox.ac.uk
> Emeritus Professor of Applied Statistics, University of Oxford
> 1 South Parks Road, Oxford OX1 3TG, UK
>
>
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
>
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