resrap-0.17.0 doesn't have any documentation.
A parsing library heavily leveraged by proc_macro.
In resrap, syntax trees are defined by the structure of data types implmenting [Parse].
Given T : Parse, a resrap::Result<T> is returned by passing a [Position] to T::parse.
Along with the [Parse] trait, there's also a derive macro of the same name which
automatically implements [Parse] for a struct or enum, given each of its members or variants also implement it.