src/test/ui/macros/macro-with-braces-in-expr-position.rs

   1 // run-pass
   2 #![allow(unused_must_use)]
   3 // ignore-emscripten no threads support
   4
   5 use std::thread;
   6
   7 macro_rules! expr { ($e: expr) => { $e } }
   8
   9 macro_rules! spawn {
  10     ($($code: tt)*) => {
  11         expr!(thread::spawn(move|| {$($code)*}).join())
  12     }
  13 }
  14
  15 pub fn main() {
  16     spawn! {
  17         println!("stmt");
  18     };
  19     let _ = spawn! {
  20         println!("expr");
  21     };
  22 }