namespace foo{
    import bar;

    // this Bar can be from bar
    // thats the point of imports
    alias Foo = Bar;
}

namespace foo{
    // the question is, can this Bar be from bar?
    alias Foo = Bar;

    import bar;
}

// or, alternatively, we can completely disallow imports
// after the first non-import directive

// that interferes with macros, because it is not possible
// to do things like this anymore (Debug can be from foo, so
// first name lookup happens before all imports are presented):
import foo;
static_if ( Debug ) {
    import debug;
}