Revision control
Copy as Markdown
Other Tools
use core::fmt::Display;
use ref_cast::RefCast;
use std::path::{Path, PathBuf};
use thiserror::Error;
#[derive(Error, Debug)]
#[error("failed to read '{file}'")]
struct StructPathBuf {
file: PathBuf,
}
#[derive(Error, Debug, RefCast)]
#[repr(C)]
#[error("failed to read '{file}'")]
struct StructPath {
file: Path,
}
#[derive(Error, Debug)]
enum EnumPathBuf {
#[error("failed to read '{0}'")]
Read(PathBuf),
}
fn assert<T: Display>(expected: &str, value: T) {
assert_eq!(expected, value.to_string());
}
#[test]
fn test_display() {
let path = Path::new("/thiserror");
let file = path.to_owned();
assert("failed to read '/thiserror'", StructPathBuf { file });
let file = path.to_owned();
assert("failed to read '/thiserror'", EnumPathBuf::Read(file));
assert("failed to read '/thiserror'", StructPath::ref_cast(path));
}