27 lines
702 B
Rust
27 lines
702 B
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#![feature(core_intrinsics)]
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use std::intrinsics::assume;
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unsafe fn f(x: i32) -> i32 {
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assume(x == 34);
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match x {
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34 => 42,
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_ => 30
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}
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}
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fn main() {
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let x = unsafe { f(34) };
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assert_eq!(x, 42);
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}
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