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