use Any
use Boolean
use Equality
use Less

```doc
# LessOrEqual

Values which implement the `<=` infix operator must implement this protocol.

If the value also implements the `Less` and `Equality` protocols then this protocol can be automatically implemented.
```
protocol LessOrEqual, requires: Less + Equality, as: do
  ```doc
  Compare `self` and `other` returning a boolean.

  The default implementation delegates to the `Less` and `Equality` protocols, however you should probably implement this function as a single comparison is more than likely much faster.
  ```
  def less_or_equal?(self: Self, other: Any): Boolean, when: Less.less?(self, other), as: true
  def less_or_equal?(self: Self, other: Any): Boolean, when: Equality.equal?(self, other), as: true
  def less_or_equal?(_self: Self, _other: Any): Boolean, as: false
end