Created
August 16, 2022 22:43
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trait PushUnique { | |
type Item; | |
fn push_unique(&mut self, item: Self::Item) -> Result<(), Self::Item>; | |
} | |
impl<T> PushUnique for Vec<T> | |
where | |
T: PartialEq, | |
{ | |
type Item = T; | |
fn push_unique(&mut self, item: Self::Item) -> Result<(), Self::Item> { | |
if self.contains(&item) { | |
Err(item) | |
} else { | |
self.push(item); | |
Ok(()) | |
} | |
} | |
} | |
#[cfg(test)] | |
mod test { | |
use super::PushUnique; | |
#[test] | |
fn can_push_single() { | |
let mut v = Vec::new(); | |
v.push_unique(0).unwrap(); | |
} | |
#[test] | |
fn cant_push_multiple() { | |
let v = Vec::new(); | |
let mut v: Vec<_> = v.into(); | |
assert!(v.push_unique(0).is_ok()); | |
assert!(v.push_unique(0).is_err()); | |
} | |
} |
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use std::slice; | |
pub fn scrutinize<T>(_x: T) { | |
let p = &_x; | |
let s = unsafe { | |
let p = p as *const T as *mut u8; | |
slice::from_raw_parts(p, std::mem::size_of::<T>()) | |
}; | |
dbg!(s); | |
} | |
#[cfg(test)] | |
mod test { | |
use crate::scrutinize::scrutinize; | |
use std::mem::MaybeUninit; | |
#[test] | |
fn zeroize() { | |
let a = &() as *const (); | |
let b = &() as *const (); | |
println!("{:?}", a.cmp(&b)); | |
} | |
#[test] | |
fn arghhhh() { | |
let bytes = MaybeUninit::<bool>::uninit(); | |
dbg!(&bytes); | |
scrutinize(bytes); | |
} | |
} |
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