src/test/compile-fail/rfc1445/feature-gate.rs

   1 // Copyright 2012 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 // Test that structural match is only permitted with a feature gate,
  12 // and that if a feature gate is supplied, it permits the type to be
  13 // used in a match.
  14
  15 // revisions: with_gate no_gate
  16
  17 #![allow(dead_code)]
  18 #![deny(future_incompatible)]
  19 #![feature(rustc_attrs)]
  20 #![cfg_attr(with_gate, feature(structural_match))]
  21
  22 #[structural_match] //[no_gate]~ ERROR semantics of constant patterns is not yet settled
  23 struct Foo {
  24     x: u32
  25 }
  26
  27 const FOO: Foo = Foo { x: 0 };
  28
  29 #[rustc_error]
  30 fn main() { //[with_gate]~ ERROR compilation successful
  31     let y = Foo { x: 1 };
  32     match y {
  33         FOO => { }
  34         _ => { }
  35     }
  36 }