IIUC, from the build errors you're seeing, the compiler can't decide if it should convert `0U` (unsigned int) to an `unsigned long` or a `char*` (e.g. as a null pointer). In other words, these two overloads are competing:
void insert (iterator p, size_t n, char c); string& insert (size_t pos, size_t n, char c); Most other standard library implementations have 'iterator' as a completely separate type from a plain `char*` pointer, to avoid things like this (since 0 can implicitly be converted to a pointer). To work around this (on Rcpp's side) I think we could cast `0` to a `std::size_t` in each call, or else perform what is essentially a 'push_front' in a separate way. Kevin On Sat, Apr 18, 2015 at 7:02 PM, Latchezar (Lucho) Dimitrov < [email protected]> wrote: > OK. Here it is. > > Hi All, > > Please see bellow my original e-mail to Mr. Eddelbuettel. > > Help anyone? I do not need necessarily a Solaris user, rather someone who > knows the actual types of 0U bellow or another way to resolve the ambiguity. > > Thanks a lot, > Latchezar > > " > Dear Mr. Eddelbuettel, > > I have just built R-3.1.2 on solaris 11.2 with solaris stufio 12.4. Then > starting it from the build I tried to install Rcpp. I failed due to the > following compilation errors: > > "attributes.cpp", line 1369: Error: Overloading ambiguity between > "std::string::insert(char*, unsigned long, char)" and > "std::string::insert(unsigned long, unsigned long, char)". > "attributes.cpp", line 1378: Error: Overloading ambiguity between > "std::string::insert(char*, unsigned long, char)" and > "std::string::insert(unsigned long, unsigned long, char)". > > The lines in the code are: > > typeText.insert(0U, 1U, *it); > and > name.insert(0U, 1U, ch); > > Apparently I have to specify the type of 0U argument. Would you please > help? > > Thanks a lot, > > Latchezar Dimitrov, > Analyst/Programmer, Wake Forest Univ. School of Medicine, > Winston-Salem, NC > U.S.A. > " > > > > > -----Original Message----- > From: Dirk Eddelbuettel [mailto:[email protected]] > Sent: Saturday, April 18, 2015 10:15 AM > To: Latchezar (Lucho) Dimitrov > Cc: [email protected] > Subject: Re: Rcpp attributes.cpp issue > > > I'd prefer the question on rcpp-devel. You may find a Solaris user there. > > Dirk > > > Thank you for your email concerning Rcpp. > > Due to the number of emails I receive about Rcpp, I can no longer respond > to each incoming email individually. However, documentation is available > via: > > eight pdf "vignette" files which are included in the package, among them > a > FAQ and an introduction to Rcpp > > the introductory vignette is also published in the Journal of Statistical > Software (http://www.jstatsoft.org/v40/i08/) > > my book at Springer (see http://www.rcpp.org/book) released in June 2013 > > about 80 examples published in the Rcpp Gallery (http://gallery.rcpp.org > ) > > numerous answers on the rcpp-devel mailing list > (http://lists.r-forge.r-project.org/mailman/listinfo/rcpp-devel) and > you are > invited to ask on the list (but need to subscribe first) > > numerous posts on the StackOverflow site under the 'rcpp' tag > (http://stackoverflow.com/questions/tagged/rcpp) and you are invited to > ask > there as well (though the rcpp-devel list may still get better answers) > > posts on my blog (http://dirk.eddelbuettel.com/blog) > > the code archive itself at GitHub https://github.com/RcppCore/Rcpp and > the > package itself on CRAN ( > http://cran.r-project.org/web/packages/Rcpp/index.html), > in particular the unitTest examples can be instructive > > the over 320 packages on CRAN (and 41 more on BioConductor) using Rcpp > > Additionally, the introductory vignettes for RcppArmadillo and RcppEigen > have now been published as well ( > http://dx.doi.org/10.1016/j.csda.2013.02.005; > http://www.jstatsoft.org/v52/i05/) > > In particular, the rcpp-devel mailing list is the perfect place for > questions (but please register in order to post, a measure required to keep > spammers away). > > Sincerely, Dirk Eddelbuettel > > -- > http://dirk.eddelbuettel.com | @eddelbuettel | [email protected] > > _______________________________________________ > Rcpp-devel mailing list > [email protected] > https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel >
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