1 unstable release
0.1.0 | May 15, 2023 |
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#195 in #add
6KB
107 lines
reveal
This library provides a macro to automatically add context to error.
Example
use std::fs;
use std::path::Path;
use reveal::error;
fn main() {
let e = save_user_data(1, "test").unwrap_err();
println!("{}", e);
}
#[error]
fn save_user_data(uid: usize, data: &str) -> reveal::Result<()> {
file_put_contents(Path::new(&format!("/root/{}", uid)), data.as_bytes())?;
Ok(())
}
// `content = "_"` excludes argument `content` from context
#[error(content = "_")]
fn file_put_contents(path: &Path, content: &[u8]) -> reveal::Result<()> {
fs::write(path, content)?;
Ok(())
}
Permission denied (os error 13)
0: fs :: write(path, content)
in file_put_contents(path = "/root/1")
at src/main.rs:21
1: file_put_contents(Path :: new(& format! ("/root/{}", uid)), data.as_bytes())
in save_user_data(uid = 1, data = "test")
at src/main.rs:14
Dependencies
~210–650KB
~15K SLoC