Go; call operator by name : what is the golang equivelent of python's `operator` package for calling builtin operators by name?
https://docs.python.org/3.4/library/operator.html

Meaning, how can I do something like

```
func f(op func(int, int)bool, a int, b int)
    return op(a, b)

f(operators.LessThan, 1, 2) // true
``` 