syn-select

Lightweight path selector for searching Rust code.

mod a {
    mod b {
        trait C {
            fn d(self) {}

            fn f() {}
        }
    }
}

fn main() {
    let src_file = syn::parse_str(include_str!("./rs")).unwrap();

    // This will print out the trait `C`, limited to only function `d`.
    dbg!(syn_select::select("a::b::C::d", &src_file).unwrap());
}

Wildcards

Using _ as a path segment in a wildcard will match any element in that position. For example, in the following:

mod imp {
    struct H;
}

mod imp2 {
    struct H;
}

The selector _::H would match both structs named H.

lib.rs:

Library to get a specific element by path in Rust code.

Usage

let file: syn::File = syn::parse_str(
    r#"
    mod a {
        mod b {
            trait C {
                fn d(self) {}
                fn f() {}
            }
        }
    }"#).unwrap();
let results = syn_select::select("a::b::C::d", &file).unwrap();
assert_eq!(results.len(), 1);