bon_macros/util/
path.rs

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1use crate::util::prelude::*;
2
3pub(crate) trait PathExt {
4    /// Check if the path starts with the given segment.
5    fn starts_with_segment(&self, desired_segment: &str) -> bool;
6
7    /// Returns an error if this path has some generic arguments.
8    fn require_mod_style(&self) -> Result;
9}
10
11impl PathExt for syn::Path {
12    fn starts_with_segment(&self, desired_segment: &str) -> bool {
13        self.segments
14            .first()
15            .map(|first| first.ident == desired_segment)
16            .unwrap_or(false)
17    }
18
19    fn require_mod_style(&self) -> Result {
20        if self
21            .segments
22            .iter()
23            .any(|seg| seg.arguments != syn::PathArguments::None)
24        {
25            bail!(self, "expected a simple path e.g. `foo::bar`");
26        }
27
28        Ok(())
29    }
30}
bon_macros/util/path.rs

bon_macros/util/
path.rs
