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Add compile fail test for unboxed_closures feature #40047

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Feb 28, 2017
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24 changes: 24 additions & 0 deletions src/test/compile-fail/feature-gate-unboxed-closures.rs
Original file line number Diff line number Diff line change
@@ -0,0 +1,24 @@
// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

struct Test;

impl FnOnce<(u32, u32)> for Test {
type Output = u32;

extern "rust-call" fn call_once(self, (a, b): (u32, u32)) -> u32 {
a + b
}
//~^^^ ERROR rust-call ABI is subject to change (see issue #29625)
}

fn main() {
assert_eq!(Test(1u32, 2u32), 3u32);
}
4 changes: 2 additions & 2 deletions src/tools/tidy/src/features.rs
Original file line number Diff line number Diff line change
Expand Up @@ -169,8 +169,8 @@ pub fn check(path: &Path, bad: &mut bool) {
let whitelist = vec![
"abi_ptx", "simd",
"cfg_target_has_atomic",
"unboxed_closures", "stmt_expr_attributes",
"cfg_target_thread_local", "unwind_attributes"
"stmt_expr_attributes",
"cfg_target_thread_local", "unwind_attributes",
];

// Only check the number of lang features.
Expand Down