package diag

// Ranger wraps the Range method.
type Ranger interface {
	// Range returns the range associated with the value.
	Range() Ranging
}

// Ranging represents a range [From, To) within an indexable sequence. Structs
// can embed Ranging to satisfy the Ranger interface.
type Ranging struct {
	From int
	To   int
}

// Range returns the Ranging itself.
func ( Ranging) () Ranging { return  }

// PointRanging returns a zero-width Ranging at the given point.
func ( int) Ranging {
	return Ranging{, }
}

// MixedRanging returns a Ranging from the start position of a to the end
// position of b.
func (,  Ranger) Ranging {
	return Ranging{.Range().From, .Range().To}
}