How to create matlab::data::CharArrayRef for matlab::data::CharArray?
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Florian Wolters
on 13 Dec 2021
Answered: Eswaramoorthy
on 28 Feb 2023
I'm using the C++ (not C!) MATLAB Data API from MATLAB R2019b. I would like to handle data referenced by a matlab::data::CharArray and a matlab::data::CharArrayRef in the same manner, i.e. I would like to implement something such as the following in C++ without using code duplication:
std::string toString(matlab::data::CharArray const& in) {
// TODO(2021-12-13 by wolters): How-to create `CharArrayRef` from
// `CharArray` in order to call the other toString function and avoid
// code duplication?
auto const multiByte = in.toUTF16();
return std::string{multiByte.begin(), multiByte.end()};
}
std::string toString(matlab::data::CharArrayRef const& in) {
auto const multiByte = in.toUTF16();
return std::string{multiByte.begin(), multiByte.end()};
}
I've tried a lot, but can't find a way to create an instance of matlab::data::CharArrayRef from an existing matlab::data::CharArray. (the same applies to other data types of the MATLAB Data API). Do you know how to achieve that?
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Accepted Answer
Eswaramoorthy
on 28 Feb 2023
Hi
Yes, you can create an instance of matlab::data::CharArrayRef from an existing matlab::data::CharArray by using the createArrayRef function. Here's an example of how you could modify your code to avoid code duplication:
std::string toString(matlab::data::CharArray const& in) {
auto const multiByte = in.toUTF16();
return std::string{multiByte.begin(), multiByte.end()};
}
std::string toString(matlab::data::CharArrayRef const& in) {
auto const multiByte = in.toUTF16();
return std::string{multiByte.begin(), multiByte.end()};
}
// Wrapper function that calls the appropriate toString function
std::string toStringWrapper(const matlab::data::CharArray& in) {
return toString(in.createArrayRef());
}
In the toStringWrapper function, we create a matlab::data::CharArrayRef object from the matlab::data::CharArray input using the createArrayRef function. This matlab::data::CharArrayRef object can then be passed to the toString function that takes a matlab::data::CharArrayRef input. By using this wrapper function, you can avoid code duplication while still being able to handle both matlab::data::CharArray and matlab::data::CharArrayRef inputs in the same manner
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