16 releases

0.2.1 Nov 20, 2024
0.2.0 Apr 26, 2024
0.1.2 Apr 18, 2024
0.1.1 Mar 6, 2024
0.0.9 Nov 29, 2023

#548 in Rust patterns

Download history 1453/week @ 2024-09-25 512/week @ 2024-10-02 1256/week @ 2024-10-09 1147/week @ 2024-10-16 1124/week @ 2024-10-23 1170/week @ 2024-10-30 823/week @ 2024-11-06 840/week @ 2024-11-13 1530/week @ 2024-11-20 1169/week @ 2024-11-27 1042/week @ 2024-12-04 864/week @ 2024-12-11 912/week @ 2024-12-18 681/week @ 2024-12-25 935/week @ 2025-01-01 728/week @ 2025-01-08

3,379 downloads per month
Used in 7 crates (5 directly)

Apache-2.0

26KB
438 lines

thiserror-ext

Crate Docs

Useful extension utilities for thiserror. See the documentation for more details.

#[derive(
    Debug,
    thiserror::Error,
    thiserror_ext::Box,
    thiserror_ext::Construct,
    thiserror_ext::ContextInto,
    thiserror_ext::Macro,
)]
#[thiserror_ext(
    newtype(name = Error, backtrace),
    macro(path = "crate::foo"),
)]
enum ErrorKind {
    #[error("cannot parse int from `{from}`")]
    Parse {
        source: std::num::ParseIntError,
        from: String,
    },

    #[error("not yet implemented: {msg}")]
    NotImplemented {
        issue: Option<i32>,
        #[message] msg: String,
    },

    #[error("internal error: {0}")]
    Internal(String),
}

// `thiserror_ext::Construct`
let error: Error = Error::internal("oops");

// `thiserror_ext::Box`
assert_eq!(std::mem::size_of::<Error>(), std::mem::size_of::<usize>());
let bt: &Backtrace = std::error::request_ref(&error).unwrap();

// `thiserror_ext::ContextInto`
let result: Result<i32, Error> = "foo".parse().into_parse("foo");

// `thiserror_ext::AsReport`
//
// "cannot parse int from `foo`: invalid digit found in string"
println!("{}", result.unwrap_err().as_report());

// `thiserror_ext::Macro`
bail_not_implemented!(issue = 42, "an {} feature", "awesome");

Dependencies

~260–730KB
~17K SLoC