37 lines
1.0 KiB
Rust
37 lines
1.0 KiB
Rust
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// Copyright 2017 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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// compile-flags: -C debug_assertions=yes
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#![feature(i128_type)]
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use std::panic;
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fn main() {
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macro_rules! overflow_test {
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($t:ident) => (
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let r = panic::catch_unwind(|| {
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($t::max_value()).next_power_of_two()
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});
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assert!(r.is_err());
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let r = panic::catch_unwind(|| {
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(($t::max_value() >> 1) + 2).next_power_of_two()
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});
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assert!(r.is_err());
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)
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}
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overflow_test!(u8);
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overflow_test!(u16);
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overflow_test!(u32);
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overflow_test!(u64);
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overflow_test!(u128);
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}
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