readme.rs - Codebrowser

1	#[macro_use(defer)]
2	extern crate scopeguard;
3
4	use scopeguard::guard;
5
6	fn f() {
7	defer! {
8	println!("Called at return or panic");
9	}
10	panic!();
11	}
12
13	use std::fs::File;
14	use std::io::Write;
15
16	fn g() {
17	let f = File::create("newfile.txt").unwrap();
18	let mut file = guard(f, \|f\| {
19	// write file at return or panic
20	let _ = f.sync_all();
21	});
22	// access the file through the scope guard itself
23	file.write_all(b"test me`\n`").unwrap();
24	}
25
26	fn main() {
27	f();
28	g();
29	}
30