[rustc.git] / src / test / ui / async-await / issue-72442.rs

// edition:2018
// incremental

use std::fs::File;
use std::future::Future;
use std::io::prelude::*;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    block_on(async {
        {
            let path = std::path::Path::new(".");
            let mut f = File::open(path.to_str())?;
            //~^ ERROR the trait bound
            let mut src = String::new();
            f.read_to_string(&mut src)?;
            Ok(())
        }
    })
}

fn block_on<F>(f: F) -> F::Output
where
    F: Future<Output = Result<(), Box<dyn std::error::Error>>>,
{
    Ok(())
}
Commit	Line	Data
f9f354fc	1	// edition:2018
c295e0f8	2	// incremental
f9f354fc XL	3
	4	use std::fs::File;
	5	use std::future::Future;
	6	use std::io::prelude::*;
	7
	8	fn main() -> Result<(), Box<dyn std::error::Error>> {
	9	block_on(async {
	10	{
	11	let path = std::path::Path::new(".");
	12	let mut f = File::open(path.to_str())?;
	13	//~^ ERROR the trait bound
	14	let mut src = String::new();
	15	f.read_to_string(&mut src)?;
	16	Ok(())
	17	}
	18	})
	19	}
	20
	21	fn block_on<F>(f: F) -> F::Output
	22	where
	23	F: Future<Output = Result<(), Box<dyn std::error::Error>>>,
	24	{
	25	Ok(())
	26	}