Anonymous struct inside loop

The code below compiles fine with g++ ``` #include <iostream> using namespace std; int main() { for (struct { int i; double j; } x = {0,0}; x.i < 10; ++x.i, x.j+=.1) { std::cout << x.i << " " << x.j << '\n'; } } ``` But with MSVC2005 I get errors ``` error C2332: 'struct' : missing tag name error C2143: syntax error : missing ')' before '{' warning C4094: untagged 'struct' declared no symbols error C2059: syntax error : 'empty declaration' error C2143: syntax error : missing ';' before ')' error C2143: syntax error : missing ';' before ')' error C2065: 'x' : undeclared identifier error C2059: syntax error : '{' error C2143: syntax error : missing ';' before '{' error C2143: syntax error : missing ';' before '}' error C2228: left of '.i' must have class/struct/union 1> type is ''unknown-type'' error C2228: left of '.i' must have class/struct/union 1> type is ''unknown-type'' error C2228: left of '.j' must have class/struct/union 1> type is ''unknown-type'' error C2059: syntax error : ')' error C2143: syntax error : missing ';' before '{' error C2228: left of '.i' must have class/struct/union 1> type is ''unknown-type'' error C2228: left of '.j' must have class/struct/union 1> type is ''unknown-type'' ``` I want to know if anonymous struct inside loops are an "extension" or a language feature and MSC2005 is missing it?