Yog Script (.ys, .yns) analyzed: its lexer, parser and syntax tree, names resolved, the class index model — what the build and the editors read a source with.
namespace System;
/// A value on the heap with one owner: a recursive struct or enum, a big
/// struct moved in O(1) (Rust's `Box<T>`).
[Intrinsic]
public sealed class Box<T> {
public Box(T value) {}
/// The value, read and written in place.
public T Value { get; set; }
}