Based off of https://github.com/jakubtomsu/odin-lbp-serialization/blob/main/serializer.odin, I created an example and made some modifications to support the latest odin compiler.

What's in this repo:

• src/reader: a program that will read the data file and print its contents, or fail if the data file is a "future" version.
• src/writer: a program that will write to the data file with the latest version.
• src/serializer: a package that contains serialization and versioning code for the example.

Using this codebase, the following things can be demoed:

• Adding fields to a struct
• Removing fields from a struct
• Converting field types (example: a single f32 converted to an array of f32s)
• Moving an already serialized struct to another struct
  • Foo moves to Collection.Foo
  • This is cool cause it shows how a restructure can be versioned
• Attempting to read from a "future version" in an "older version" of the reader app gets an error
• Accounting for fields that are added, but then later removed

The commit history of the src/serializer/serializer.odin file might also better illustrate versioning over time.