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<tr class="memdesc:gab9efb238a82207d91643994c5295cf8c"><td class="mdescLeft">&#160;</td><td class="mdescRight">Defines members of a structure, while at the same time modeling <code>Struct</code>.Using this macro in the body of a user-defined type will define the given members inside that type, and will also provide a model of the <code>Struct</code> concept for that user-defined type. This macro is often the easiest way to define a model of the <code>Struct</code> concept.  <a href="group__group-St