fparkan/vendor/bitflags/examples/custom_derive.rs
Valentin Popov 1b6a04ca55
Initial vendor packages
Signed-off-by: Valentin Popov <valentin@popov.link>
2024-01-08 01:21:28 +04:00

24 lines
644 B
Rust

//! An example of implementing the `BitFlags` trait manually for a flags type.
use std::str;
use bitflags::bitflags;
// Define a flags type outside of the `bitflags` macro as a newtype
// It can accept custom derives for libaries `bitflags` doesn't support natively
#[derive(zerocopy::AsBytes, zerocopy::FromBytes)]
#[repr(transparent)]
pub struct ManualFlags(u32);
// Next: use `impl Flags` instead of `struct Flags`
bitflags! {
impl ManualFlags: u32 {
const A = 0b00000001;
const B = 0b00000010;
const C = 0b00000100;
const ABC = Self::A.bits() | Self::B.bits() | Self::C.bits();
}
}
fn main() {}