Visualize ownership and lifetimes in Rust for debugging and optimization

RustOwl visualizes ownership movement and lifetimes of variables. When you save Rust source code, it is analyzed, and the ownership and lifetimes of variables are visualized when you hover over a variable or function call.

RustOwl visualizes those by using underlines:

green: variable's actual lifetime blue: immutable borrowing purple: mutable borrowing orange: value moved red: lifetime error - diff of lifetime between actual and expected

Currently, we offer VSCode extension and Neovim plugin. We implemented LSP server cargo owlsp which extends the protocol. So, RustOwl can be used easily from other editor.