commit | 72e001aa680f7609da94c0c86a9ef22c789d7c82 | [log] [tgz] |
---|---|---|
author | James Farrell <[email protected]> | Tue May 21 14:39:33 2024 +0000 |
committer | Automerger Merge Worker <[email protected]> | Tue May 21 14:39:33 2024 +0000 |
tree | 843f6409b281e80510410d566e992774628c9a41 | |
parent | 5be6c59d5645942c2ea2b0313359b917103fe128 [diff] | |
parent | c5c55530bd11526a8996d2fd62774116c14984ff [diff] |
Update Android.bp by running cargo_embargo am: c5c55530bd Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/bitflags/+/3094766 Change-Id: If5c3c32b9f4d6bfb1be10657cdc9b969a14d45cb Signed-off-by: Automerger Merge Worker <[email protected]>
bitflags
generates flags enums with well-defined semantics and ergonomic end-user APIs.
You can use bitflags
to:
You can't use bitflags
to:
guarantee only bits corresponding to defined flags will ever be set. bitflags
allows access to the underlying bits type so arbitrary bits may be set.
define bitfields. bitflags
only generates types where set bits denote the presence of some combination of flags.
Add this to your Cargo.toml
:
[dependencies] bitflags = "2.4.2"
and this to your source code:
use bitflags::bitflags;
Generate a flags structure:
use bitflags::bitflags; // The `bitflags!` macro generates `struct`s that manage a set of flags. bitflags! { /// Represents a set of flags. #[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)] struct Flags: u32 { /// The value `A`, at bit position `0`. const A = 0b00000001; /// The value `B`, at bit position `1`. const B = 0b00000010; /// The value `C`, at bit position `2`. const C = 0b00000100; /// The combination of `A`, `B`, and `C`. const ABC = Self::A.bits() | Self::B.bits() | Self::C.bits(); } } fn main() { let e1 = Flags::A | Flags::C; let e2 = Flags::B | Flags::C; assert_eq!((e1 | e2), Flags::ABC); // union assert_eq!((e1 & e2), Flags::C); // intersection assert_eq!((e1 - e2), Flags::A); // set difference assert_eq!(!e2, Flags::A); // set complement }
The minimum supported Rust version is documented in the Cargo.toml
file. This may be bumped in minor releases as necessary.