darling_core/util/
path_to_string.rs

1/// Transform Rust paths to a readable and comparable string.
2///
3/// # Limitations
4/// * Leading colons are ignored.
5/// * Angle brackets and `as` elements are ignored.
6///
7/// # Example
8/// ```rust
9/// # use darling_core::util::path_to_string;
10/// # use syn::parse_quote;
11/// assert_eq!(path_to_string(&parse_quote!(a::b)), "a::b");
12/// ```
13pub fn path_to_string(path: &syn::Path) -> String {
14    path.segments
15        .iter()
16        .map(|s| s.ident.to_string())
17        .collect::<Vec<String>>()
18        .join("::")
19}
20
21#[cfg(test)]
22mod tests {
23    use syn::parse_quote;
24
25    use super::path_to_string;
26
27    #[test]
28    fn simple_ident() {
29        assert_eq!(path_to_string(&parse_quote!(a)), "a");
30    }
31
32    #[test]
33    fn simple_path() {
34        assert_eq!(path_to_string(&parse_quote!(a::b)), "a::b");
35    }
36}