mirror of
https://github.com/dtolnay/thiserror.git
synced 2025-04-04 21:37:57 +03:00
520343e37d
DisplayDebug currently works but DebugDisplay does not.
error[E0277]: `PathBuf` doesn't implement `std::fmt::Display`
--> tests/test_path.rs:36:13
|
32 | #[derive(Error, Debug)]
| ----- in this derive macro expansion
...
36 | #[error("debug:{0:?} display:{0}")]
| ^^^^^^^^^^^^^^^^^^^^^^^^^ `PathBuf` cannot be formatted with the default formatter; call `.display()` on it
|
= help: the trait `std::fmt::Display` is not implemented for `PathBuf`
= note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
= note: call `.display()` or `.to_string_lossy()` to safely print paths, as they may contain non-Unicode data
= help: the trait `std::fmt::Display` is implemented for `Var<'_, T>`
= note: this error originates in the macro `$crate::format_args` which comes from the expansion of the derive macro `Error` (in Nightly builds, run with -Z macro-backtrace for more info)
52 lines
1.1 KiB
Rust
52 lines
1.1 KiB
Rust
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),
|
|
}
|
|
|
|
#[derive(Error, Debug)]
|
|
#[error("{tail}")]
|
|
pub struct UnsizedError {
|
|
pub head: i32,
|
|
pub tail: str,
|
|
}
|
|
|
|
#[derive(Error, Debug)]
|
|
pub enum BothError {
|
|
#[error("display:{0} debug:{0:?}")]
|
|
DisplayDebug(PathBuf),
|
|
#[error("debug:{0:?} display:{0}")]
|
|
DebugDisplay(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));
|
|
}
|