114 lines
2.2 KiB
Rust
114 lines
2.2 KiB
Rust
#![feature(async_closure)]
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#![warn(clippy::redundant_closure_call)]
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#![allow(clippy::redundant_async_block)]
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#![allow(clippy::type_complexity)]
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#![allow(unused)]
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async fn something() -> u32 {
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21
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}
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async fn something_else() -> u32 {
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2
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}
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fn main() {
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let a = (|| 42)();
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let b = (async || {
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let x = something().await;
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let y = something_else().await;
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x * y
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})();
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let c = (|| {
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let x = 21;
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let y = 2;
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x * y
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})();
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let d = (async || something().await)();
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macro_rules! m {
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() => {
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(|| 0)()
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};
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}
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macro_rules! m2 {
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() => {
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(|| m!())()
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};
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}
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m2!();
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issue9956();
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}
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fn issue9956() {
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assert_eq!((|| || 43)()(), 42);
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// ... and some more interesting cases I've found while implementing the fix
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// not actually immediately calling the closure:
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let a = (|| 42);
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dbg!(a());
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// immediately calling it inside of a macro
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dbg!((|| 42)());
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// immediately calling only one closure, so we can't remove the other ones
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let a = (|| || || 123)();
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dbg!(a()());
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// nested async closures
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let a = (|| || || || async || 1)()()()()();
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let h = async { a.await };
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// macro expansion tests
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macro_rules! echo {
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($e:expr) => {
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$e
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};
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}
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let a = (|| echo!(|| echo!(|| 1)))()()();
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assert_eq!(a, 1);
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let a = (|| echo!((|| 123)))()();
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assert_eq!(a, 123);
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// chaining calls, but not closures
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fn x() -> fn() -> fn() -> fn() -> i32 {
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|| || || 42
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}
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let _ = x()()()();
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fn bar() -> fn(i32, i32) {
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foo
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}
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fn foo(_: i32, _: i32) {}
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bar()((|| || 42)()(), 5);
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foo((|| || 42)()(), 5);
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}
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async fn issue11357() {
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(|| async {})().await;
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}
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mod issue11707 {
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use core::future::Future;
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fn spawn_on(fut: impl Future<Output = ()>) {}
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fn demo() {
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spawn_on((|| async move {})());
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}
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}
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fn avoid_double_parens() {
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std::convert::identity((|| 13_i32 + 36_i32)()).leading_zeros();
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}
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fn fp_11274() {
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macro_rules! m {
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($closure:expr) => {
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$closure(1)
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};
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}
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m!(|x| println!("{x}"));
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}
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