struct.h

#pragma once
#include <string>
#include <vector>
#include <cstdint>
/* typedef is allowed */
typedef unsigned long long int my_uint_t;
 
namespace sn {
    namespace typecheck {
        struct record_t { /*the types with direct mapping to HDF5*/
            char  _char; unsigned char _uchar; short _short; unsigned short _ushort; int _int; unsigned int _uint;
            long _long; unsigned long _ulong; long long int _llong; unsigned long long _ullong;
            float _float; double _double; long double _ldouble;
            bool _bool;
            // wide characters are not supported in HDF5
            // wchar_t _wchar; char16_t _wchar16; char32_t _wchar32;
        };
    }
    namespace other {
        struct record_t {                    // POD struct with nested namespace
            my_uint_t                   idx; // typedef type 
            my_uint_t                    aa; // typedef type 
            double              field_02[3]; // const array mapped 
            typecheck::record_t field_03[4]; //
        };
    }
    namespace example {
        struct record_t {                    // POD struct with nested namespace
            my_uint_t                     idx; // typedef type 
            float              field_02[7]; // const array mapped 
            sn::other::record_t field_03[5]; // embedded Record
            sn::other::record_t field_04[5]; // must be optimized out, same as previous
            other::record_t  field_05[3][8]; // array of arrays 
        };
    }
    namespace not_supported_yet {
        // NON POD: not supported in phase 1
        // C++ Class -> PODstruct -> persistence[ HDF5 | ??? ] -> PODstruct -> C++ Class 
        struct container_t {
            double                              idx; // 
            std::string                    field_05; // c++ object makes it non-POD
            std::vector<example::record_t> field_02; // ditto
        };
    }
    /* BEGIN IGNORED STRUCT */
    // these structs are not referenced with h5::read|h5::write|h5::create operators
    // hence compiler should ignore them.
    struct ignored_record_t {
        signed long int   idx;
        float        field_0n;
    };
    /* END IGNORED STRUCTS */
}