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