Here you 'go': http://golang.org/src/pkg/sort/sort.go http://golang.org/src/pkg/sort/sort.go http://golang.org/doc/go_spec.html#Type_assertions http://golang.o

Here you 'go': http://golang.org/src/pkg/sort/sort.go http://golang.org/src/pkg/sort/sort.go http://golang.org/doc/go_spec.html#Type_assertions http://golang.org/doc/go_spec.html#Type_assertions is possible, but it is costly. Basically, you either have to go through the tedium of writing "convenience" boiler plate (per above sort.go) or bite the runtime hit.