rust/library/std
Manish Goregaokar 3209582a87
Rollup merge of #87601 - a1phyr:feature_uint_add_signed, r=kennytm
Add functions to add unsigned and signed integers

This PR adds methods to unsigned integers to add signed integers with good overflow semantics under `#![feature(mixed_integer_ops)]`.

The added API is:

```rust
// `uX` is `u8`, `u16`, `u32`, `u64`,`u128`, `usize`
impl uX {
    pub const fn checked_add_signed(self, iX) -> Option<Self>;
    pub const fn overflowing_add_signed(self, iX) -> (Self, bool);
    pub const fn saturating_add_signed(self, iX) -> Self;
    pub const fn wrapping_add_signed(self, iX) -> Self;
}

impl iX {
    pub const fn checked_add_unsigned(self, uX) -> Option<Self>;
    pub const fn overflowing_add_unsigned(self, uX) -> (Self, bool);
    pub const fn saturating_add_unsigned(self, uX) -> Self;
    pub const fn wrapping_add_unsigned(self, uX) -> Self;

    pub const fn checked_sub_unsigned(self, uX) -> Option<Self>;
    pub const fn overflowing_sub_unsigned(self, uX) -> (Self, bool);
    pub const fn saturating_sub_unsigned(self, uX) -> Self;
    pub const fn wrapping_sub_unsigned(self, uX) -> Self;
}
```

Maybe it would be interesting to also have `add_signed` that panics in debug and wraps in release ?
2021-10-06 12:33:13 -07:00
..
benches mv std libs to library/ 2020-07-27 19:51:13 -05:00
primitive_docs Add primitive documentation to libcore 2021-09-12 02:23:08 +00:00
src Rollup merge of #87601 - a1phyr:feature_uint_add_signed, r=kennytm 2021-10-06 12:33:13 -07:00
tests Update aarch64 runtime feature detection tests 2021-08-03 12:07:56 +00:00
build.rs Add SOLID targets 2021-09-28 11:31:47 +09:00
Cargo.toml Expose the std_detect env_override feature 2021-09-25 20:30:25 +02:00