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|
1| |// compile-flags: --edition=2018
2| |#![feature(no_coverage)]
3| |
4| |macro_rules! bail {
5| | ($msg:literal $(,)?) => {
6| | if $msg.len() > 0 {
7| | println!("no msg");
8| | } else {
9| | println!($msg);
10| | }
11| | return Err(String::from($msg));
12| | };
13| |}
14| |
15| |macro_rules! on_error {
16| | ($value:expr, $error_message:expr) => {
17| | $value.or_else(|e| { // FIXME(85000): no coverage in closure macros
18| | let message = format!($error_message, e);
19| | if message.len() > 0 {
20| | println!("{}", message);
21| | Ok(String::from("ok"))
22| | } else {
23| | bail!("error");
24| | }
25| | })
26| | };
27| |}
28| |
29| 1|fn load_configuration_files() -> Result<String, String> {
30| 1| Ok(String::from("config"))
31| 1|}
32| |
33| 1|pub async fn test() -> Result<(), String> {
34| 1| println!("Starting service");
35| 1| let config = on_error!(load_configuration_files(), "Error loading configs: {}")?;
^0
36| |
37| 1| let startup_delay_duration = String::from("arg");
38| 1| let _ = (config, startup_delay_duration);
39| 1| Ok(())
40| 1|}
41| |
42| |#[no_coverage]
43| |fn main() {
44| | executor::block_on(test());
45| |}
46| |
47| |mod executor {
48| | use core::{
49| | future::Future,
50| | pin::Pin,
51| | task::{Context, Poll, RawWaker, RawWakerVTable, Waker},
52| | };
53| |
54| | #[no_coverage]
55| | pub fn block_on<F: Future>(mut future: F) -> F::Output {
56| | let mut future = unsafe { Pin::new_unchecked(&mut future) };
57| | use std::hint::unreachable_unchecked;
58| | static VTABLE: RawWakerVTable = RawWakerVTable::new(
59| |
60| | #[no_coverage]
61| | |_| unsafe { unreachable_unchecked() }, // clone
62| |
63| | #[no_coverage]
64| | |_| unsafe { unreachable_unchecked() }, // wake
65| |
66| | #[no_coverage]
67| | |_| unsafe { unreachable_unchecked() }, // wake_by_ref
68| |
69| | #[no_coverage]
70| | |_| (),
71| | );
72| | let waker = unsafe { Waker::from_raw(RawWaker::new(core::ptr::null(), &VTABLE)) };
73| | let mut context = Context::from_waker(&waker);
74| |
75| | loop {
76| | if let Poll::Ready(val) = future.as_mut().poll(&mut context) {
77| | break val;
78| | }
79| | }
80| | }
81| |}
|
