Naming conventions for derive-deftly expansions

Here we discuss some naming conventions used in the naming of derive-deftly expansions.

Many derive-deftly expansions' names start with a single letter to indicate what information they use:

• t for top-level (the struct, enum, or union you are applying the template to),
• v for variant (a variant of an enum),
• or f for field (a single field of a struct or variant).

For example, there is $ttype for "top-level type" and $fname for "field name".

(We say "top-level" instead of "struct", since the "top-level" part of a declaration can also be an enum or a union.)

Many derive-deftly expansions end with a short identifier for what they contain. For example, $tname is the name of a top-level type, $vname is the name of a variant, and $fname is the name of a field. Whenever possible (and logical), we have tried to use the same identifier for the t, v, and f cases.