0fcb85997d
This follows the same pattern as the other numeric trait impls, and reduces the clutter in std::num.
50 lines
1.4 KiB
Rust
50 lines
1.4 KiB
Rust
// Copyright 2012 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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//! Operations and constants for `u32`
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use num::{CheckedAdd, CheckedSub, CheckedMul};
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use option::{Option, Some, None};
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use unstable::intrinsics;
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pub use self::generated::*;
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uint_module!(u32, i32, 32)
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impl CheckedAdd for u32 {
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#[inline]
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fn checked_add(&self, v: &u32) -> Option<u32> {
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unsafe {
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let (x, y) = intrinsics::u32_add_with_overflow(*self, *v);
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if y { None } else { Some(x) }
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}
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}
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}
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impl CheckedSub for u32 {
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#[inline]
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fn checked_sub(&self, v: &u32) -> Option<u32> {
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unsafe {
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let (x, y) = intrinsics::u32_sub_with_overflow(*self, *v);
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if y { None } else { Some(x) }
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}
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}
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}
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impl CheckedMul for u32 {
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#[inline]
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fn checked_mul(&self, v: &u32) -> Option<u32> {
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unsafe {
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let (x, y) = intrinsics::u32_mul_with_overflow(*self, *v);
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if y { None } else { Some(x) }
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}
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}
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}
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