src/test/compile-fail/empty-struct-braces-pat-1.rs

   1 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 // Can't use empty braced struct as constant pattern
  12
  13 // aux-build:empty-struct.rs
  14
  15 extern crate empty_struct;
  16 use empty_struct::*;
  17
  18 struct Empty1 {}
  19
  20 enum E {
  21     Empty3 {}
  22 }
  23
  24 fn main() {
  25     let e1 = Empty1 {};
  26     let e3 = E::Empty3 {};
  27     let xe1 = XEmpty1 {};
  28     let xe3 = XE::XEmpty3 {};
  29
  30     match e1 {
  31         Empty1 => () // Not an error, `Empty1` is interpreted as a new binding
  32     }
  33     match e3 {
  34         E::Empty3 => ()
  35         //~^ ERROR expected unit struct/variant or constant, found struct variant `E::Empty3`
  36     }
  37     match xe1 {
  38         XEmpty1 => () // Not an error, `XEmpty1` is interpreted as a new binding
  39     }
  40     match xe3 {
  41         XE::XEmpty3 => ()
  42         //~^ ERROR expected unit struct/variant or constant, found struct variant `XE::XEmpty3`
  43     }
  44 }