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|
mod lifetimes {
use snafu::prelude::*;
#[derive(Debug, Snafu)]
struct Error<'a> {
key: &'a i32,
}
#[test]
fn are_allowed() {
let key = 42;
let e = Snafu { key: &key }.build();
assert_eq!(*e.key, key);
}
}
mod types {
use snafu::prelude::*;
#[derive(Debug, Snafu)]
struct Error<T> {
key: T,
}
#[test]
fn are_allowed() {
let key = 42;
let e: Error<i32> = Snafu { key }.build();
assert_eq!(e.key, key);
}
#[cfg(feature="std")]
mod with_defaults {
use snafu::{prelude::*, AsErrorSource};
use std::{error::Error as StdError, fmt::Debug, io};
#[derive(Debug, Snafu)]
struct Error<S = io::Error, T = String>
where
S: StdError + AsErrorSource,
T: Debug,
{
source: S,
key: T,
}
#[test]
fn allows_non_default_types() {
#[derive(Debug, Snafu)]
struct AnotherError;
let r = AnotherSnafu.fail::<()>();
let _e: Error<_, u8> = r.context(Snafu { key: 42 }).unwrap_err();
}
}
}
mod bounds {
mod inline {
use snafu::prelude::*;
use std::fmt::Display;
#[derive(Debug, Snafu)]
#[snafu(display("key: {}", key))]
struct Error<T: Display> {
key: T,
}
#[test]
fn are_preserved() {
let e: Error<bool> = Snafu { key: true }.build();
let display = e.to_string();
assert_eq!(display, "key: true");
}
}
mod where_clause {
use snafu::prelude::*;
use std::fmt::Display;
#[derive(Debug, Snafu)]
#[snafu(display("key: {}", key))]
struct Error<T>
where
T: Display,
{
key: T,
}
#[test]
fn are_preserved() {
let e: Error<bool> = Snafu { key: true }.build();
let display = e.to_string();
assert_eq!(display, "key: true");
}
}
}
|
