extern crate proc_macro2;
extern crate syn;
use std::str::FromStr;
use proc_macro2::TokenStream;
use syn::{Expr, ExprRange};
#[test]
fn test_expr_parse() {
let code = "..100u32";
let tt = TokenStream::from_str(code).unwrap();
let expr: Expr = syn::parse2(tt.clone()).unwrap();
let expr_range: ExprRange = syn::parse2(tt).unwrap();
assert_eq!(expr, Expr::Range(expr_range));
}