Policy: Discussing past behavior

[ehuss]

Should the spec ever refer to past behavior of Rust?

• ehuss's preference is to never refer to past behavior.

[mattheww]

On this subject, rfc3355 says

The specification is specific to the latest version of Rust. [...]

While the specification might include notes about the Rust version that a feature was introduced in for informative purposes (similar to standard library documentation), it does not attempt to accurately specify older, unsupported versions of Rust.

The Vision blog post says:

The descriptive definitions tell the reader how a construct will behave with
respect to a specific Rust version (e.g. Rust 1.76).