1 // aux-build: proc_macro_with_span.rs
3 #![warn(clippy::single_match_else)]
4 #![allow(clippy::needless_return)]
5 #![allow(clippy::no_effect)]
7 extern crate proc_macro_with_span;
8 use proc_macro_with_span::with_span;
16 static NODE: ExprNode = ExprNode::Unicorns;
18 fn unwrap_addr() -> Option<&'static ExprNode> {
19 let _ = match ExprNode::Butterflies {
20 ExprNode::ExprAddrOf => Some(&NODE),
28 with_span!(span match ExprNode::Butterflies {
29 ExprNode::ExprAddrOf => Some(&NODE),
37 macro_rules! unwrap_addr {
38 ($expression:expr) => {
40 ExprNode::ExprAddrOf => Some(&NODE),
51 unwrap_addr!(ExprNode::Unicorns);
54 // don't lint single exprs/statements
59 Some(a) => println!("${:?}", a),
65 Some(a) => println!("${:?}", a),
73 Some(a) => println!("${:?}", a),
80 // lint multiple exprs/statements "else" blocks
85 Some(a) => println!("${:?}", a),
87 println!("else block");
94 Some(a) => println!("${:?}", a),
96 println!("else block");
102 use std::convert::Infallible;
103 match Result::<i32, Infallible>::Ok(1) {
104 Ok(a) => println!("${:?}", a),
106 println!("else block");
111 use std::borrow::Cow;
112 match Cow::from("moo") {
113 Cow::Owned(a) => println!("${:?}", a),
114 Cow::Borrowed(_) => {
115 println!("else block");