commit 76cd60a0275f085ec1f379324b0314da1902c431
author Travis Cross <tc@traviscross.com> Sun Oct 05 08:02:14 2025 +0000
committer Travis Cross <tc@traviscross.com> Sun Oct 05 08:22:48 2025 +0000
tree 6bd5ab9137fbb3379a3c6f644c6d1b19d4b0878d
parent 5acc59fe14a31c268576b1e9af07c7ec66827a4a

Revise extending tuple struct constructor examples

The example for the tuple enum variant constructor should go above the
example that already uses a tuple enum variant constructor in a nested
manner.  This also matches the order in the list of extending
expressions above -- the list items for tuple struct constructors and
tuple enum variant constructors come after tuple expressions and
before block expressions.

For demonstrating a tuple enum variant constructor, it's better to use
`Some(_)` than to define one; `Option<T>` is well known enough.

For the tuple struct that we need to define, let's use a short name
like `W<T>` here rather than `TupleStruct<T>` (and show its
definition).  When I see a name like `TupleStruct`, it takes me a
moment to confirm it's just a name and not more than that.  We use
this `W<T>(T)` "wrapper" tuple struct definition elsewhere in the
Reference.

As a wording matter, we say "argument to" rather than "argument of".

Similarly, something isn't an argument to a tuple struct but an
argument to the tuple struct constructor, so let's say that.