direct_mod_range_hashing Interface

# `direct_mod_range_hashing` Interface

A mod range-hashing class (uses the modulo function).

1. `hash_policy.hpp`
2. Template parameters.
3. Public Types and Constants:
   1. General definitions.
4. Public Methods:
   1. Constructors, destructor, and related.
5. Protected Methods:
   1. Notification methods.
   2. Operators.

## Template parameters.

Parameter | Description | Default Value
    Size_Type
| Size type. | size_t

## General definitions.

Type | Definition | Description
    size_type
    Size_Type
| Size type.

## Constructors, destructor, and related.

Method | Description
    void
      swap
      (direct_mod_range_hashing &r_other)
| Swaps content.

## Notification methods.

## Operators.

Method | Description
    inline size_type
      operator()
      (size_type hash) const
| Transforms the hash value `hash` into a ranged-hash value (using a modulo operation).