Can someone tell me what the "~" does in generics/type-constraints?

[warm flax]

type Ordered interface {
    ~int | ~int8 | ~int16 | ~int32 | ~int64 |
        ~uint | ~uint8 | ~uint16 | ~uint32 | ~uint64 | ~uintptr |
        ~float32 | ~float64 |
        ~string
}
``` this code works just fine without the tildas. I just don't understand.

[north lava]

it's means that match derived types

type derived int

is also part of Ordered by of the ~ in front of int