[Rcpp-devel] inline error

[Romain Francois]

Just a warning that this code creates a NumericVector of length 1 initialised with 0. 

1 is not a NumericVector so the compiler looks for a conversion, the one that is found is the ctor for NumericVector that takes an int. 

Romain

Le 28 oct. 2013 à 17:05, Hadley Wickham <h.wickham at gmail.com> a écrit :

> FYI, that's equivalent to the somewhat cleaner
> 
> library(Rcpp)
> cppFunction("NumericVector x(NumericVector start) {
>  return 1;
> }")
> 
> Hadley
> 
> On Mon, Oct 28, 2013 at 8:58 AM, Simon Zehnder <szehnder at uni-bonn.de> wrote:
>> Dear Rcpp::Users and Rcpp::Devels,
>> 
>> I get a weird error when using inline and I want to know, where it comes from. I run the following code:
>> 
>> library(Rcpp)
>> library(inline)
>> cfunc <- cxxfunction(signature(start="vector"), body = "Rcpp::NumericVector x(start); return 1;", plugins = "Rcpp”)
>> 
>> And I get the following Error:
>> 
>> Error in compileCode(f, code, language = language, verbose = verbose) :
>>  Compilation ERROR, function(s)/method(s) not created! file1606062c0507.cpp: In function ‘SEXPREC* file1606062c0507(SEXP)’:
>> file1606062c0507.cpp:19:1: error: ‘Rcpp’ has not been declared
>> Rcpp::NumericVector x(start); return 1;
>> ^
>> file1606062c0507.cpp:19:21: error: expected ‘;’ before ‘x’
>> Rcpp::NumericVector x(start); return 1;
>>                     ^
>> file1606062c0507.cpp:19:38: error: invalid conversion from ‘int’ to ‘SEXP’ [-fpermissive]
>> Rcpp::NumericVector x(start); return 1;
>>                                      ^
>> make: *** [file1606062c0507.o] Error 1
>> In addition: Warning message:
>> running command '/Library/Frameworks/R.framework/Resources/bin/R CMD SHLIB file1606062c0507.cpp 2> file1606062c0507.cpp.err.txt' had status 1
>> 
>> Best
>> Simon
>> 
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> 
> 
> 
> -- 
> Chief Scientist, RStudio
> http://had.co.nz/
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