EDIT: The Rust API evolution RFC distinguishes between breaking changes and changes that require a new semver-major version (called major changes). All major changes are breaking, but not all breaking changes are major. Changing a struct to an enum is always breaking (as pointed out on r/rust) but is not always major (equivalent to this case). In this post, we're trying to avoid making a major change.The title and content has been slightly edited since the original publication for clarity on ...
