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|
#![warn(rust_2018_idioms, single_use_lifetimes)]
#![allow(dead_code)]
use pin_project::{pin_project, pinned_drop};
use std::pin::Pin;
#[test]
fn safe_project() {
#[pin_project(PinnedDrop)]
pub struct Struct<'a> {
was_dropped: &'a mut bool,
#[pin]
field: u8,
}
#[pinned_drop]
impl PinnedDrop for Struct<'_> {
fn drop(self: Pin<&mut Self>) {
**self.project().was_dropped = true;
}
}
let mut was_dropped = false;
drop(Struct { was_dropped: &mut was_dropped, field: 42 });
assert!(was_dropped);
}
#[test]
fn mut_self_argument() {
#[pin_project(PinnedDrop)]
struct Struct {
data: usize,
}
#[pinned_drop]
impl PinnedDrop for Struct {
fn drop(mut self: Pin<&mut Self>) {
let _: &mut _ = &mut self.data;
}
}
}
#[test]
fn self_in_vec() {
#[pin_project(PinnedDrop)]
struct Struct {
data: usize,
}
#[pinned_drop]
impl PinnedDrop for Struct {
fn drop(self: Pin<&mut Self>) {
let _: Vec<_> = vec![self.data];
}
}
}
#[test]
fn self_in_macro_containing_fn() {
#[pin_project(PinnedDrop)]
pub struct Struct {
data: usize,
}
macro_rules! emit {
($($tt:tt)*) => {
$($tt)*
};
}
#[pinned_drop]
impl PinnedDrop for Struct {
fn drop(self: Pin<&mut Self>) {
let _ = emit!({
impl Struct {
pub fn f(self) {}
}
});
let _ = self.data;
}
}
}
#[test]
fn self_call() {
#[pin_project(PinnedDrop)]
pub struct Struct {
data: usize,
}
trait Trait {
fn self_ref(&self) {}
fn self_pin_ref(self: Pin<&Self>) {}
fn self_mut(&mut self) {}
fn self_pin_mut(self: Pin<&mut Self>) {}
fn assoc_fn(_this: Pin<&mut Self>) {}
}
impl Trait for Struct {}
#[pinned_drop]
impl PinnedDrop for Struct {
fn drop(mut self: Pin<&mut Self>) {
self.self_ref();
self.as_ref().self_pin_ref();
self.self_mut();
self.as_mut().self_pin_mut();
Self::assoc_fn(self.as_mut());
<Self>::assoc_fn(self.as_mut());
}
}
}
#[test]
fn self_expr() {
#[pin_project(PinnedDrop)]
pub struct Struct {
x: usize,
}
#[pinned_drop]
impl PinnedDrop for Struct {
fn drop(mut self: Pin<&mut Self>) {
let _: Self = Self { x: 0 };
}
}
#[pin_project(PinnedDrop)]
pub struct TupleStruct(usize);
#[pinned_drop]
impl PinnedDrop for TupleStruct {
fn drop(mut self: Pin<&mut Self>) {
let _: Self = Self(0);
}
}
}
#[rustversion::since(1.37)]
#[test]
fn self_expr_enum() {
#[pin_project(PinnedDrop)]
pub enum Enum {
StructVariant { x: usize },
TupleVariant(usize),
}
#[pinned_drop]
impl PinnedDrop for Enum {
fn drop(mut self: Pin<&mut Self>) {
let _: Self = Self::StructVariant { x: 0 };
let _: Self = Self::TupleVariant(0);
}
}
}
#[test]
fn self_pat() {
#[pin_project(PinnedDrop)]
pub struct Struct {
x: usize,
}
#[pinned_drop]
impl PinnedDrop for Struct {
#[allow(irrefutable_let_patterns)]
#[allow(clippy::match_single_binding)]
fn drop(mut self: Pin<&mut Self>) {
match *self {
Self { x: _ } => {}
}
if let Self { x: _ } = *self {}
let Self { x: _ } = *self;
}
}
#[pin_project(PinnedDrop)]
pub struct TupleStruct(usize);
#[pinned_drop]
impl PinnedDrop for TupleStruct {
#[allow(irrefutable_let_patterns)]
fn drop(mut self: Pin<&mut Self>) {
match *self {
Self(_) => {}
}
if let Self(_) = *self {}
let Self(_) = *self;
}
}
}
#[rustversion::since(1.37)]
#[test]
fn self_pat_enum() {
#[pin_project(PinnedDrop)]
pub enum Enum {
StructVariant { x: usize },
TupleVariant(usize),
}
#[pinned_drop]
impl PinnedDrop for Enum {
fn drop(mut self: Pin<&mut Self>) {
match *self {
Self::StructVariant { x: _ } => {}
Self::TupleVariant(_) => {}
}
if let Self::StructVariant { x: _ } = *self {}
if let Self::TupleVariant(_) = *self {}
}
}
}
// See also `ui/pinned_drop/self.rs`.
#[rustversion::since(1.40)] // https://github.com/rust-lang/rust/pull/64690
#[test]
fn self_in_macro_def() {
#[pin_project(PinnedDrop)]
pub struct Struct {
x: usize,
}
#[pinned_drop]
impl PinnedDrop for Struct {
fn drop(self: Pin<&mut Self>) {
macro_rules! t {
() => {{
let _ = self;
}};
}
t!();
}
}
}
|
