Implicit type conversion - compiler warnings [+suggestion]

[jaw]

When compiling with -Wconversion and -Wsign-conversion, the generated code results in some worrisome warnings about type conversions.

The main culprit seems to be the size_type in LoanableCollection:

class LoanableCollection
{
public:

    using size_type = int32_t;

This is mixed with size_t in the generated code which is unsigned. ( https://en.cppreference.com/w/c/types/size_t.html )
Does LoanableCollection::size_type really have to be signed?

This warning goes away if one changes this to size_t.

Would it be possible to change this to simply size_t?

Examples in the generated code

length() being int32_t here but returned as size_t:

SWIGINTERN size_t eprosima_fastdds_dds_LoanableSequence_Sl_HelloWorld_Sc_std_false_type_Sg____len__(eprosima::fastdds::dds::LoanableSequence< HelloWorld,std::false_type > const *self){
        return self->length();
    }

Operator being fed i of type size_t:

SWIGINTERN HelloWorld const &eprosima_fastdds_dds_LoanableSequence_Sl_HelloWorld_Sc_std_false_type_Sg____getitem__(eprosima::fastdds::dds::LoanableSequence< HelloWorld,std::false_type > const *self,size_t i){
        return (*self)[i];
    }

Thanks!