|  | Home | Libraries | People | FAQ | More | 
        These traits are all value traits, which is to say the
        traits classes all inherit from integral_constant,
        and are used to access some numerical property of a type. Often this is a
        simple true or false Boolean value, but in a few cases may be some other
        integer value (for example when dealing with type alignments, or array bounds:
        see alignment_of,
        rank
        and extent).