93 lines
2.1 KiB
Rust
93 lines
2.1 KiB
Rust
use super::*;
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use crate::Flags;
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#[test]
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fn cases() {
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case(
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TestFlags::A | TestFlags::B,
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&[
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(TestFlags::A, 1 << 1),
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(TestFlags::B, 1),
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(TestFlags::from_bits_retain(1 << 3), 1 | 1 << 1),
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],
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TestFlags::difference,
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);
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case(
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TestFlags::from_bits_retain(1 | 1 << 3),
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&[
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(TestFlags::A, 1 << 3),
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(TestFlags::from_bits_retain(1 << 3), 1),
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],
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TestFlags::difference,
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);
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case(
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TestExternal::from_bits_retain(!0),
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&[(TestExternal::A, 0b1111_1110)],
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TestExternal::difference,
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);
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assert_eq!(
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0b1111_1110,
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(TestExternal::from_bits_retain(!0) & !TestExternal::A).bits()
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);
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assert_eq!(
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0b1111_1110,
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(TestFlags::from_bits_retain(!0).difference(TestFlags::A)).bits()
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);
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// The `!` operator unsets bits that don't correspond to known flags
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assert_eq!(
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1 << 1 | 1 << 2,
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(TestFlags::from_bits_retain(!0) & !TestFlags::A).bits()
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);
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}
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#[track_caller]
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fn case<T: Flags + std::fmt::Debug + std::ops::Sub<Output = T> + std::ops::SubAssign + Copy>(
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value: T,
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inputs: &[(T, T::Bits)],
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mut inherent: impl FnMut(T, T) -> T,
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) where
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T::Bits: std::fmt::Debug + PartialEq + Copy,
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{
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for (input, expected) in inputs {
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assert_eq!(
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*expected,
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inherent(value, *input).bits(),
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"{:?}.difference({:?})",
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value,
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input
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);
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assert_eq!(
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*expected,
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Flags::difference(value, *input).bits(),
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"Flags::difference({:?}, {:?})",
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value,
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input
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);
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assert_eq!(
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*expected,
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(value - *input).bits(),
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"{:?} - {:?}",
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value,
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input
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);
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assert_eq!(
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*expected,
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{
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let mut value = value;
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value -= *input;
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value
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}
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.bits(),
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"{:?} -= {:?}",
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value,
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input,
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);
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}
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}
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