educe/common/
path.rs

1use quote::ToTokens;
2use syn::{spanned::Spanned, Expr, Lit, LitStr, Meta, MetaNameValue, Path};
3
4#[inline]
5pub(crate) fn meta_name_value_2_path(name_value: &MetaNameValue) -> syn::Result<Path> {
6    match &name_value.value {
7        Expr::Lit(lit) => {
8            if let Lit::Str(lit) = &lit.lit {
9                return lit.parse();
10            }
11        },
12        Expr::Path(path) => return Ok(path.path.clone()),
13        _ => (),
14    }
15
16    Err(syn::Error::new(
17        name_value.value.span(),
18        format!("expected `{path} = Path`", path = path_to_string(&name_value.path)),
19    ))
20}
21
22#[inline]
23pub(crate) fn meta_2_path(meta: &Meta) -> syn::Result<Path> {
24    match &meta {
25        Meta::NameValue(name_value) => meta_name_value_2_path(name_value),
26        Meta::List(list) => {
27            if let Ok(lit) = list.parse_args::<LitStr>() {
28                lit.parse()
29            } else {
30                list.parse_args()
31            }
32        },
33        Meta::Path(path) => Err(syn::Error::new(
34            path.span(),
35            format!("expected `{path} = Path` or `{path}(Path)`", path = path_to_string(path)),
36        )),
37    }
38}
39
40#[inline]
41pub(crate) fn path_to_string(path: &Path) -> String {
42    path.into_token_stream().to_string().replace(' ', "")
43}
educe/common/path.rs

educe/common/
path.rs
