On 2 January 2013 14:32, NAVEEN CHANDRAKAR wrote: > > My question is what is the definition/grammer of empty structure. As i > couldn't find it covered in C/Cxx standard document.
The page you linked to defines a GCC extension to the C language, so if course it's not in the C standard. As the page says, ISO C++ allows empty structures, it's just a class with no members, which is valid in ISO C++ anyway.