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How to use D structures from C code?

Could anyone explain me how to use D structures from C code? If I am trying to use it I receive such an error:

error: storage size of 'myStruct' isn't known
   struct str_struct myStruct;

This is a structure:

extern(C) {
    struct str_struct {
        string str;
      };
}

I use it in C like this : struct str_struct myStruct;

Solution

  • You have to duplicate the struct definition with all members in both languages (unless you want to refer to it only by pointer). C can't see a field list written in D.

    D:

    struct Foo {
    int length;
    int* data;
}

    C:

    typedef struct Foo {
    int length;
    int* data;
};

    The tricky thing is to get long right. long in D is always 64 bits, so in C, that would be long long. Most other basic types translate pretty easily though: short=>short, int to int, char to char, pointers work the same way, etc.