Why is size_t an alias and not a typedef(or a struct that is not implictly convertable)
----test.d
void main(){
ulong a;
size_t b=a;//only compiles on 64-bit
}
----
$ dmd -m64 test
$ dmd -m32 test
test.d(3): Error: cannot implicitly convert expression (a) of
type ulong to uint
