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
|
pub static MESSAGE: &'static str = "Hello";
#[derive(Debug)]
pub enum SimpleFsData {
File(u64, String),
Directory(u64, Vec<(String, SimpleFsData)>)
}
// pub static HELLO: &'static SimpleFsData =
// SimpleFsData:File("hello.txt", "Hello World");
pub fn get_data1() -> SimpleFsData {
SimpleFsData::Directory(
1, vec!(("hello".to_string(),
SimpleFsData::File(2, "Hello, World!".to_string()))))
}
pub fn traverse_fs<F>(file: SimpleFsData, f: &mut F)
where F: FnMut(& SimpleFsData) {
f(&file);
match file {
SimpleFsData::Directory(_, children) => for (_, file) in children {
traverse_fs(file, f);
},
_ => (),
}
}
#[test]
fn traverse() {
let mut result = String::new();
{
let mut f = |ref file: &SimpleFsData| {
match *file {
&SimpleFsData::File(_, ref s) => result += &s,
_ => (),
};
};
traverse_fs(get_data1(), &mut f);
}
assert_eq!("Hello, World!", result);
}
|
