Lib.rs

实现Trait Syn::Visit jquery风格

示例

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]);
}