Method empty

src/simulate/simulate_gc.cpp:22–22

        PtrRange ( char * F, size_t size ) : from(F), to(F+size) {}
        void clear() { from = to = nullptr; }
        __forceinline bool empty() const { return from==to; }
        __forceinline bool contains ( const PtrRange & r ) { return !empty() && !r.empty() && from<=r.from && to>=r.to; }
    };