Check whether CPP function was properly exported

This check function uses check_code with an advanced regex pattern.

check_cpp_function_exported(state, return_type, name,
  not_exported_msg = NULL)

Arguments

state	A child state that focuses on the cpp portion of an exercise submission.
return_type	A character string denoting the return type of the function that should have been exported.
name	A character string denoting name of the function that should have been exported.
not_exported_msg	An optional character string with a message that is shown if the function was not exported properly.

Examples

# NOT RUN {
# Example solution cpp
#include 
using namespace Rcpp ;

// [[Rcpp::export]]
int answer(){
  return 42 ;
}

/*** R
x <- answer()
x
*/

# SCT
ex() %>% check_cpp() %>% check_cpp_function_exported("int", "answer")
# }