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How to avoid the ambiguous overloaded operator problem when using list and numeric vector in Rcpp?

December 27, 2019, 4:53 am
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Goal

The code below is a very simplified version of my original code for creating a reproducible example. In this code, I am trying to generate a vector that is filled up by using 2 values in each iteration from a for-loop. These values are first multiplied with a parameter p_BL that I provide in a parameters list. You can see that at the end of the code I multiply the parameter (from a list) to a integer in a NumericVector. That's where I get the overloaded operator error. How can I resolve this?

Code in the simple_function.cpp file

#include <Rcpp.h>
using namespace Rcpp;


// [[Rcpp::export]]
NumericVector my_func(List parameters, int number_simulations)
{

  NumericVector vector_trig_times (number_simulations);
  NumericVector vector_trig_times1 (number_simulations);
  NumericVector vector_trig_times2 (number_simulations);


  for (int i_simulation = 0; i_simulation < number_simulations; i_simulation++) {

    int vector_activation1 = i_simulation + 2;

    int vector_activation2 = i_simulation + 5;



    vector_trig_times1[i_simulation] = vector_activation1;

    vector_trig_times2[i_simulation] = vector_activation2;



    vector_trig_times[i_simulation] = (parameters["p_BL"] * vector_trig_times2[i_simulation]) + ((1-parameters["p_BL"]) * vector_trig_times1[i_simulation]);

  } // i_simulations for loop


    return vector_trig_times;
}

Compiling the file:

library(Rcpp)
sourceCpp("simple_function.cpp")

Error

enter image description here

Note: Line 28 refers to:

vector_trig_times[i_simulation] = (parameters["p_BL"] * vector_trig_times2[i_simulation]) + ((1-parameters["p_BL"]) * vector_trig_times1[i_simulation]);

Edit: Text of the error message

C:/RBuildTools/3.5/mingw_64/bin/g++  -I"C:/PROGRA~1/R/R-36~1.1/include" -DNDEBUG   -I"C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include" -I"C:/Users/durraniu/GOOGLE~1/DISSER~1"        -O2 -Wall  -mtune=generic -c simple_function.cpp -o simple_function.o

simple_function.cpp: In function 'Rcpp::NumericVector my_func(Rcpp::List, int)':

simple_function.cpp:28:59: error: no match for 'operator*' (operand types are 'Rcpp::Vector<19>::NameProxy {aka Rcpp::internal::generic_name_proxy<19, Rcpp::PreserveStorage>}' and 'Rcpp::traits::storage_type<14>::type {aka double}')

     vector_trig_times[i_simulation] = (parameters["p_BL"] * vector_trig_times2[i_simulation]) + ((1-parameters["p_BL"]) * vector_trig_times1[i_simulation]);

                                                           ^

simple_function.cpp:28:59: note: candidates are:

In file included from C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/RcppCommon.h:136:0,

                 from C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp.h:27,

                 from simple_function.cpp:1:

C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/complex.h:25:17: note: Rcomplex operator*(const Rcomplex&, const Rcomplex&)

 inline Rcomplex operator*( const Rcomplex& lhs, const Rcomplex& rhs) {

                 ^

C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/complex.h:25:17: note:   no known conversion for argument 2 from 'Rcpp::traits::storage_type<14>::type {aka double}' to 'const Rcomplex&'

In file included from C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/sugar/operators/operators.h:33:0,

                 from C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/sugar/sugar.h:30,

                 from C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp.h:74,

                 from simple_function.cpp:1:

C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/sugar/operators/times.h:473:1: note: template<int RTYPE, bool LHS_NA, class LHS_T, bool RHS_NA, class RHS_T> Rcpp::sugar::Times_Vector_Vector<RTYPE, LHS_NA, LHS_T, RHS_NA, RHS_T> Rcpp::operator*(const Rcpp::VectorBase<RHS_RTYPE, RHS_NA, RHS_T>&, const Rcpp::VectorBase<RTYPE, RHS_NA, RHS_T>&)

 operator*(

 ^

C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/sugar/operators/times.h:473:1: note:   template argument deduction/substitution failed:

simple_function.cpp:28:92: note:   'Rcpp::Vector<19>::NameProxy {aka Rcpp::internal::generic_name_proxy<19, Rcpp::PreserveStorage>}' is not derived from 'const Rcpp::VectorBase<RHS_RTYPE, RHS_NA, RHS_T>'

     vector_trig_times[i_simulation] = (parameters["p_BL"] * vector_trig_times2[i_simulation]) + ((1-parameters["p_BL"]) * vector_trig_times1[i_simulation]);

                                                                                            ^

In file included from C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/sugar/operators/operators.h:33:0,

                 from C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/sugar/sugar.h:30,

                 from C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp.h:74,

                 from simple_function.cpp:1:

C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/sugar/operators/times.h:459:1: note: template<int RTYPE, bool NA, class T, class U> typename Rcpp::traits::enable_if<Rcpp::traits::is_convertible<typename Rcpp::traits::remove_const_and_reference<U>::type, typename Rcpp::traits::storage_type<RTYPE>::type>::value, Rcpp::sugar::Times_Vector_Primitive_nona<RTYPE, NA, T> >::type Rcpp::operator*(const Rcpp::sugar::NonaPrimitive<U>&, const Rcpp::VectorBase<RHS_RTYPE, RHS_NA, RHS_T>&)

 operator*(

 ^

C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/sugar/operators/times.h:459:1: note:   template argument deduction/substitution failed:

simple_function.cpp:28:92: note:   'Rcpp::Vector<19>::NameProxy {aka Rcpp::internal::generic_name_proxy<19, Rcpp::PreserveStorage>}' is not derived from 'const Rcpp::sugar::NonaPrimitive<U>'

     vector_trig_times[i_simulation] = (parameters["p_BL"] * vector_trig_times2[i_simulation]) + ((1-parameters["p_BL"]) * vector_trig_times1[i_simulation]);

                                                                                            ^

In file included from C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/sugar/operators/operators.h:33:0,

                 from C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/sugar/sugar.h:30,

                 from C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp.h:74,

                 from simple_function.cpp:1:

C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/sugar/operators/times.h:450:1: note: template<int RTYPE, bool NA, class T, class U> typename Rcpp::traits::enable_if<Rcpp::traits::is_convertible<typename Rcpp::traits::remove_const_and_reference<U>::type, typename Rcpp::traits::storage_type<RTYPE>::type>::value, Rcpp::sugar::Times_Vector_Primitive_nona<RTYPE, NA, T> >::type Rcpp::operator*(const Rcpp::VectorBase<RHS_RTYPE, RHS_NA, RHS_T>&, const Rcpp::sugar::NonaPrimitive<U>&)

 operator*(

 ^

C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/sugar/operators/times.h:450:1: note:   template argument deduction/substitution failed:

simple_function.cpp:28:92: note:   'Rcpp::Vector<19>::NameProxy {aka Rcpp::internal::generic_name_proxy<19, Rcpp::PreserveStorage>}' is not derived from 'const Rcpp::VectorBase<RHS_RTYPE, RHS_NA, RHS_T>'

     vector_trig_times[i_simulation] = (parameters["p_BL"] * vector_trig_times2[i_simulation]) + ((1-parameters["p_BL"]) * vector_trig_times1[i_simulation]);

                                                                                            ^

In file included from C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/sugar/operators/operators.h:33:0,

                 from C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/sugar/sugar.h:30,

                 from C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp.h:74,

                 from simple_function.cpp:1:

C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/sugar/operators/times.h:439:1: note: template<int RTYPE, bool NA, class T, class U> typename Rcpp::traits::enable_if<Rcpp::traits::is_convertible<typename Rcpp::traits::remove_const_and_reference<U>::type, typename Rcpp::traits::storage_type<RTYPE>::type>::value, Rcpp::sugar::Times_Vector_Primitive<RTYPE, NA, T> >::type Rcpp::operator*(const U&, const Rcpp::VectorBase<RHS_RTYPE, RHS_NA, RHS_T>&)

 operator*(

 ^

C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/sugar/operators/times.h:439:1: note:   template argument deduction/substitution failed:

simple_function.cpp:28:92: note:   mismatched types 'const Rcpp::VectorBase<RHS_RTYPE, RHS_NA, RHS_T>' and 'Rcpp::traits::storage_type<14>::type {aka double}'

     vector_trig_times[i_simulation] = (parameters["p_BL"] * vector_trig_times2[i_simulation]) + ((1-parameters["p_BL"]) * vector_trig_times1[i_simulation]);

                                                                                            ^

In file included from C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/sugar/operators/operators.h:33:0,

                 from C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/sugar/sugar.h:30,

                 from C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp.h:74,

                 from simple_function.cpp:1:

C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/sugar/operators/times.h:429:1: note: template<int RTYPE, bool NA, class T, class U> typename Rcpp::traits::enable_if<Rcpp::traits::is_convertible<typename Rcpp::traits::remove_const_and_reference<U>::type, typename Rcpp::traits::storage_type<RTYPE>::type>::value, Rcpp::sugar::Times_Vector_Primitive<RTYPE, NA, T> >::type Rcpp::operator*(const Rcpp::VectorBase<RHS_RTYPE, RHS_NA, RHS_T>&, const U&)

 operator*(

 ^

C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/sugar/operators/times.h:429:1: note:   template argument deduction/substitution failed:

simple_function.cpp:28:92: note:   'Rcpp::Vector<19>::NameProxy {aka Rcpp::internal::generic_name_proxy<19, Rcpp::PreserveStorage>}' is not derived from 'const Rcpp::VectorBase<RHS_RTYPE, RHS_NA, RHS_T>'

     vector_trig_times[i_simulation] = (parameters["p_BL"] * vector_trig_times2[i_simulation]) + ((1-parameters["p_BL"]) * vector_trig_times1[i_simulation]);

                                                                                            ^

In file included from C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/Vector.h:58:0,

                 from C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp.h:40,

                 from simple_function.cpp:1:

C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/vector/Matrix.h:271:14: note: template<int RTYPE, template<class> class StoragePolicy, class T> typename Rcpp::traits::enable_if<Rcpp::traits::is_convertible<typename Rcpp::traits::remove_const_and_reference<T>::type, typename Rcpp::Matrix<RTYPE, StoragePolicy>::stored_type>::value, Rcpp::Matrix<RTYPE, StoragePolicy> >::type Rcpp::operator*(const T&, const Rcpp::Matrix<RTYPE, StoragePolicy>&)

              operator __OPERATOR__ (const T &lhs, const Matrix<RTYPE, StoragePolicy> &rhs) {                                  \

              ^

C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/vector/Matrix.h:280:1: note: in expansion of macro 'RCPP_GENERATE_SCALAR_MATRIX_OPERATOR'

 RCPP_GENERATE_SCALAR_MATRIX_OPERATOR(*)

 ^

C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/vector/Matrix.h:271:14: note:   template argument deduction/substitution failed:

              operator __OPERATOR__ (const T &lhs, const Matrix<RTYPE, StoragePolicy> &rhs) {                                  \

              ^

C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/vector/Matrix.h:280:1: note: in expansion of macro 'RCPP_GENERATE_SCALAR_MATRIX_OPERATOR'

 RCPP_GENERATE_SCALAR_MATRIX_OPERATOR(*)

 ^

simple_function.cpp:28:92: note:   mismatched types 'const Rcpp::Matrix<RTYPE, StoragePolicy>' and 'Rcpp::traits::storage_type<14>::type {aka double}'

     vector_trig_times[i_simulation] = (parameters["p_BL"] * vector_trig_times2[i_simulation]) + ((1-parameters["p_BL"]) * vector_trig_times1[i_simulation]);

                                                                                            ^

In file included from C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/Vector.h:58:0,

                 from C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp.h:40,

                 from simple_function.cpp:1:

C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/vector/Matrix.h:254:14: note: template<int RTYPE, template<class> class StoragePolicy, class T> typename Rcpp::traits::enable_if<Rcpp::traits::is_convertible<typename Rcpp::traits::remove_const_and_reference<T>::type, typename Rcpp::Matrix<RTYPE, StoragePolicy>::stored_type>::value, Rcpp::Matrix<RTYPE, StoragePolicy> >::type Rcpp::operator*(const Rcpp::Matrix<RTYPE, StoragePolicy>&, const T&)

              operator __OPERATOR__ (const Matrix<RTYPE, StoragePolicy> &lhs, const T &rhs) {                                  \

              ^

C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/vector/Matrix.h:262:1: note: in expansion of macro 'RCPP_GENERATE_MATRIX_SCALAR_OPERATOR'

 RCPP_GENERATE_MATRIX_SCALAR_OPERATOR(*)

 ^

C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/vector/Matrix.h:254:14: note:   template argument deduction/substitution failed:

              operator __OPERATOR__ (const Matrix<RTYPE, StoragePolicy> &lhs, const T &rhs) {                                  \

              ^

C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/vector/Matrix.h:262:1: note: in expansion of macro 'RCPP_GENERATE_MATRIX_SCALAR_OPERATOR'

 RCPP_GENERATE_MATRIX_SCALAR_OPERATOR(*)

 ^

simple_function.cpp:28:92: note:   'Rcpp::Vector<19>::NameProxy {aka Rcpp::internal::generic_name_proxy<19, Rcpp::PreserveStorage>}' is not derived from 'const Rcpp::Matrix<RTYPE, StoragePolicy>'

     vector_trig_times[i_simulation] = (parameters["p_BL"] * vector_trig_times2[i_simulation]) + ((1-parameters["p_BL"]) * vector_trig_times1[i_simulation]);

                                                                                            ^

simple_function.cpp:28:100: error: ambiguous overload for 'operator-' (operand types are 'int' and 'Rcpp::Vector<19>::NameProxy {aka Rcpp::internal::generic_name_proxy<19, Rcpp::PreserveStorage>}')

     vector_trig_times[i_simulation] = (parameters["p_BL"] * vector_trig_times2[i_simulation]) + ((1-parameters["p_BL"]) * vector_trig_times1[i_simulation]);

                                                                                                    ^

simple_function.cpp:28:100: note: candidates are:

In file included from C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/date_datetime/date_datetime.h:29:0,

                 from C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp.h:62,

                 from simple_function.cpp:1:

C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/date_datetime/Datetime.h:158:20: note: double Rcpp::operator-(const Rcpp::Datetime&, const Rcpp::Datetime&)

     inline double  operator-(const Datetime& d1, const Datetime& d2) { return d1.m_dt - d2.m_dt; }

                    ^

In file included from C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/date_datetime/date_datetime.h:25:0,

                 from C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp.h:62,

                 from simple_function.cpp:1:

C:/Users/durraniu/Documents/R/win-library/3.6/Rcpp/include/Rcpp/date_datetime/Date.h:164:19: note: double Rcpp::operator-(const Rcpp::Date&, const Rcpp::Date&)

     inline double operator-( const Date& d1, const Date& d2) { return d1.m_d -  d2.m_d; }

                   ^

make: *** [C:/PROGRA~1/R/R-36~1.1/etc/x64/Makeconf:215: simple_function.o] Error 1

Error in sourceCpp("simple_function.cpp") : 
  Error 1 occurred building shared library.
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