I can actually help you out on this one. I spent the summer hacking on the Rust compiler for my internship. If I'm understanding the code correctly, this is the

I can actually help you out on this one. I spent the summer hacking on the Rust compiler for my internship. If I'm understanding the code correctly, this is the enum of elements represented in the dependency graph. https://manishearth.github.io/rust-internals-docs/rustc/dep_graph/enum.DepNode.html https://manishearth.github.io/rust-internals-docs/rustc/dep_... Note that as per: https://manishearth.github.io/rust-internals-docs/rustc/dep_graph/struct.DepGraph.html https://manishearth.github.io/rust-internals-docs/rustc/dep_... The DepGraph that we actually care about is specialized to talk about DefIds. In rustc, DefIds are attached to the following things: https://manishearth.github.io/rust-internals-docs/rustc/hir/def/enum.Def.html https://manishearth.github.io/rust-internals-docs/rustc/hir/... This means dependencies are analyzed down to local variables and uses. But even beyond that it tracks things such as borrow checks, linting and more!