LL| |// compile-flags: --edition=2018 | |
LL| |#![feature(coverage_attribute)] | |
LL| | | |
LL| |macro_rules! bail { | |
LL| | ($msg:literal $(,)?) => { | |
LL| | if $msg.len() > 0 { | |
LL| | println!("no msg"); | |
LL| | } else { | |
LL| | println!($msg); | |
LL| | } | |
LL| | return Err(String::from($msg)); | |
LL| | }; | |
LL| |} | |
LL| | | |
LL| |macro_rules! on_error { | |
LL| | ($value:expr, $error_message:expr) => { | |
LL| | $value.or_else(|e| { // FIXME(85000): no coverage in closure macros | |
LL| | let message = format!($error_message, e); | |
LL| | if message.len() > 0 { | |
LL| | println!("{}", message); | |
LL| | Ok(String::from("ok")) | |
LL| | } else { | |
LL| | bail!("error"); | |
LL| | } | |
LL| | }) | |
LL| | }; | |
LL| |} | |
LL| | | |
LL| 1|fn load_configuration_files() -> Result<String, String> { | |
LL| 1| Ok(String::from("config")) | |
LL| 1|} | |
LL| | | |
LL| 1|pub async fn test() -> Result<(), String> { | |
LL| 1| println!("Starting service"); | |
LL| 1| let config = on_error!(load_configuration_files(), "Error loading configs: {}")?; | |
^0 | |
LL| | | |
LL| 1| let startup_delay_duration = String::from("arg"); | |
LL| 1| let _ = (config, startup_delay_duration); | |
LL| 1| Ok(()) | |
LL| 1|} | |
LL| | | |
LL| |#[coverage(off)] | |
LL| |fn main() { | |
LL| | executor::block_on(test()).unwrap(); | |
LL| |} | |
LL| | | |
LL| |mod executor { | |
LL| | use core::{ | |
LL| | future::Future, | |
LL| | pin::Pin, | |
LL| | task::{Context, Poll, RawWaker, RawWakerVTable, Waker}, | |
LL| | }; | |
LL| | | |
LL| | #[coverage(off)] | |
LL| | pub fn block_on<F: Future>(mut future: F) -> F::Output { | |
LL| | let mut future = unsafe { Pin::new_unchecked(&mut future) }; | |
LL| | use std::hint::unreachable_unchecked; | |
LL| | static VTABLE: RawWakerVTable = RawWakerVTable::new( | |
LL| | #[coverage(off)] | |
LL| | |_| unsafe { unreachable_unchecked() }, // clone | |
LL| | #[coverage(off)] | |
LL| | |_| unsafe { unreachable_unchecked() }, // wake | |
LL| | #[coverage(off)] | |
LL| | |_| unsafe { unreachable_unchecked() }, // wake_by_ref | |
LL| | #[coverage(off)] | |
LL| | |_| (), | |
LL| | ); | |
LL| | let waker = unsafe { Waker::from_raw(RawWaker::new(core::ptr::null(), &VTABLE)) }; | |
LL| | let mut context = Context::from_waker(&waker); | |
LL| | | |
LL| | loop { | |
LL| | if let Poll::Ready(val) = future.as_mut().poll(&mut context) { | |
LL| | break val; | |
LL| | } | |
LL| | } | |
LL| | } | |
LL| |} | |