1 unstable release
0.1.0 | Aug 22, 2022 |
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#18 in #error-derive
Used in shanimation-rs
14KB
133 lines
Error Stack Derive
A simple crate with a simple derive macro to make your error handling workflow simpler than ever :)
Check out the examples directory for, well, examples and check out the docs for more information about the macro.
Or, here's one
use std::fs::read_to_string;
use error_stack::{IntoReport, ResultExt};
use error_stack_derive::ErrorStack;
#[derive(ErrorStack, Debug)]
#[error_message(&format!("Error occured with foo ({}, {})", self.bar, self.baz))]
struct FooError {
bar: u8,
baz: u8,
}
fn main() {
let foo = read_to_string("foo.txt")
.report()
.change_context(FooError { bar: 0, baz: 1 });
assert!(foo.is_err());
let err = foo.err().unwrap();
// Error occured with foo (0, 1)
// at examples/structs.rs:16:10
//
// Caused by:
// 0: No such file or directory (os error 2)
// at examples/structs.rs:15:10
// FooError { bar: 0, baz: 1 }
println!("{:?}\n{:?}", err, err.downcast_ref::<FooError>().unwrap())
}
Dependencies
~1.5MB
~35K SLoC