A Cargo plugin to list unsafe code in a Rust project. Right now mostly a proof of concept.
Not actually a cargo plugin yet.
Example from winit, a crate that does a large amount of
platform-specific FFI:
```
cargo run -- winit/src/**.rs ... Unsafe functions: 20/85 Unsafe expressions: 222/16847 Unsafe traits: 0/14 Unsafe methods: 14/460 Unsafe impls: 21/136 ```
Example from ggez, a crate that mostly uses dependencies that
provide safe wrappers, and so needs little unsafe code itself:
```
cargo run -- ggez/src/**.rs ... Unsafe functions: 0/101 Unsafe expressions: 0/6786 Unsafe traits: 0/7 Unsafe methods: 0/312 Unsafe impls: 1/122 ```
Right now it only provides a simple command line program that reads in N Rust source files. Doesn't walk dependencies or anything, you have to provide all files on the command line. It has no command line flags worth speaking of.
The code itself is nigh trivial, just read the source. It uses syn
to walk a Rust source code file and counts up the occurances of
unsafe in various places. There may be some it misses, just open an
issue or whatever.
Should be split into a library someday maybe.