renovatebot_renovate/lib/modules/versioning/cargo

Cargo versioning uses Semantic Versioning 2.0.

Cargo supports ranges in a similar manner to npm, but not identical. The important differences are:

Use of commas

Multiple version requirements can also be separated with a comma, e.g. >= 1.2, < 1.5. We interpret this to mean AND.

No exact versions unless using equals =

In Cargo, 1.2.3 doesn't mean "exactly 1.2.3", it actually means >=1.2.3 <2.0.0. So this is like the equivalent of ^1.2.3 in npm.