syn_query 0.1.2

implement Trait Syn::Visit
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31

 implement Trait Syn::Visit
 ## Example
 ```rust
 extern crate proc_macro2;
 extern crate syn;
 extern crate syn_query;
 use proc_macro2::Span;
 use syn::{ExprStruct, FieldValue, Ident};
 use syn_query::Queryable;
 fn main() {
     let s = "Point { x: 1, y: 1 }";
     let st: ExprStruct = syn::parse_str(s).unwrap();
     let qr = st.query::<Ident>();
     assert_eq!(qr[0].data, Ident::new("Point", Span::call_site()));
     assert_eq!(qr[0].path, vec![0i64, 0i64, 0i64]);
     assert_eq!(qr[1].data, Ident::new("x", Span::call_site()));
     assert_eq!(qr[1].path, vec![2i64, 0i64, 0i64]);
     assert_eq!(qr[2].data, Ident::new("y", Span::call_site()));
     assert_eq!(qr[2].path, vec![3i64, 0i64, 0i64]);
     let qr = st.query::<FieldValue>()
         .filter(|x| x.path[0] == 3)
         .query::<Ident>();
     assert_eq!(qr[0].data, Ident::new("y", Span::call_site()));
     assert_eq!(qr[0].path, vec![3i64, 0i64, 0i64]);
     let qr = st.children::<syn::Path>()
         .children::<syn::PathSegment>()
         .children::<Ident>();
     assert_eq!(qr[0].data, Ident::new("Point", Span::call_site()));
     assert_eq!(qr[0].path, vec![0i64, 0i64, 0i64]);
 }
 ```