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