Plain old C: accessing member of a function returning struct -

please me question of "legitimacy".

assuming foo() function returning structure, officially acceptable assign member of structure directly variable, example

x = foo().member

both gnu-c complier , embedded c compiler (keil) accept without grumbles legitimate according official c standard or relaxed attitude of these particular compilers? if it's legit, has been legit or recent development?

here's example compiles , runs ok:

typedef struct {     int a;     int b; } footype;  footype testfoo(void) {     footype n;      n.a = 1;     n.b = 2;     return n; }  int main() {     printf("\ntest = %d\n", testfoo().a);     return 0; } 

yes, standard c syntax.