Good examples of value types

[Justin Whear via Digitalmars-d]

On Tue, 05 May 2015 20:40:58 +0000, Luís Marques wrote:

> could you come up with some type that would really benefit from being a
> value type but that isn't numeric (or otherwise similar)?

Dates, times, durations, regular expressions, tokens, lazy generators, 
digests, vectors, really any type that provides a interpretation/behavior 
wrapper around one or more trivially copyable types.

Frankly, the real divide in my mind is polymorphic/non-polymorphic, not 
by-reference vs by-value, though I will occasionally use `final class` if 
I want a convenience reference type around a resource.