jpastuszek’s gists

jpastuszek / pin.rs

Last active April 25, 2023 13:52 — forked from rust-play/playground.rs

Pin and PhantomPinned

	use core::pin::Pin;
	use core::marker::PhantomPinned;

	#[derive(Debug)]
	struct Unm(i32, PhantomPinned); // !Unpin
	//struct Unm(i32); // Unpin

	fn foo() -> Pin<Box<Unm>> {
	// PhantomPinned is !Unpin so Pin does not implement get_mut (disallowing mem::swap/replece and then move) nor into_inner (move out Unm of Box)
	Box::pin(Unm(1, PhantomPinned))

jpastuszek / playground.rs

Last active December 20, 2022 15:04 — forked from rust-play/playground.rs

Return impl Trait generic trainsient borrow

	#![feature(type_alias_impl_trait)]

	use std::io::Read;
	use std::io::Cursor;

	struct B(String);
	struct RefPairA<'b>(&'b B, String);

	trait GetPair {
	fn pair(&self) -> (&str, &str);

jpastuszek / smuggle.rs

Created March 5, 2021 17:24

Toy to export HTTP request smuggling

jpastuszek / playground.rs

Last active February 8, 2021 15:09 — forked from rust-play/playground.rs

Using vtable dispatch to work with owned type behind Box<dyn> trait

	use std::any::{Any, TypeId};
	use std::fmt::Debug;

	pub trait Resource: Any + Debug {
	// this returns correct function for the Self to work on Box so that it can be casted and unboxed
	fn combine_fn(&self) -> fn(left: Box<dyn Resource>, right: Box<dyn Resource>) -> Box<dyn Resource>;
	}

	#[derive(Debug)]
	struct File(u32);

jpastuszek / sync_cache.rs

Last active May 12, 2022 02:30 — forked from rust-play/playground.rs

Rust: RwLock Cache

	use std::sync::Mutex;
	use std::sync::RwLock;
	use std::sync::Arc;
	use std::collections::HashMap;
	use lazy_static::lazy_static;

	lazy_static! {
	static ref CACHE: Mutex<HashMap<&'static str, Arc<RwLock<Option<u32>>>>> = Mutex::new(HashMap::new());
	}

jpastuszek / raii_drop_phantop_ref.rs

Last active May 7, 2020 12:22 — forked from rust-play/playground.rs

Drop and pahntom ref unsound drop order

	use std::marker::PhantomData;

	struct Connection(u32);

	impl Connection {
	fn statement(&self) -> Statement {
	Statement(Raii(self.0), PhantomData)
	}
	}

jpastuszek / mullvard.rs

Created January 31, 2020 17:31

Check mullvard.net IP status with Denim

jpastuszek / csv_const_generics.rs

Last active January 7, 2020 12:02 — forked from rust-play/playground.rs

Rust: Using const generics on trait to write CSV records of const number of columns

	#![feature(const_generics)]
	#![feature(const_generic_impls_guard)]

	trait CsvRecord<const COLS: usize> {
	fn columns() -> [&'static str; COLS];
	fn values(&self) -> [String; COLS];
	}

	struct Foo {
	id: u32,

jpastuszek / tracer.rs

Last active November 6, 2019 13:13

Groups GDB stack traces

jpastuszek / playground.rs

Created July 8, 2019 09:41 — forked from rust-play/playground.rs

Code shared from the Rust Playground

	// https://stackoverflow.com/questions/50519147/double-mutable-borrow-error-in-a-loop-happens-even-with-nll-on
	// https://github.com/rust-lang/rust/issues/54663
	// This will complie with polonius: rustc +nightly -Zpolonius --edition=2018 /tmp/p.rs
	struct Foo(u8);

	impl Foo {
	fn even<'i>(&'i mut self) -> &'i u8 {
	loop {
	match self.next() {
	Some(even) => return even,

Jakub Pastuszek jpastuszek