rust/comprehensive-rust
1
0
Fork 0
mirror of https://github.com/google/comprehensive-rust.git synced 2025-05-24 11:13:48 +02:00
Code Issues Releases Activity

As done in Rust book

Browse Source 
https://doc.rust-lang.org/rust-by-example/error/multiple_error_types/boxing_errors.html
This commit is contained in:
Alexandre Senges 2023-08-14 16:58:18 +02:00 committed by GitHub
parent 0ac245ee61
commit 7e59a106a1
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
src/error-handling/dynamic-errors.md
View File

@ -7,12 +7,13 @@ all the different possibilities. `std::error::Error` makes this easy.
use std::fs; use std::fs;
use std::io::Read; use std::io::Read;
use thiserror::Error; use thiserror::Error;
use std::error;
#[derive(Clone, Debug, Eq, Error, PartialEq)] #[derive(Clone, Debug, Eq, Error, PartialEq)]
#[error("Found no username in {0}")] #[error("Found no username in {0}")]
struct EmptyUsernameError(String); struct EmptyUsernameError(String);
fn read_username(path: &str) -> Result<String, Box<dyn std::error::Error>> { fn read_username(path: &str) -> Result<String, Box<dyn error::Error>> {
let mut username = String::new(); let mut username = String::new();
fs::File::open(path)?.read_to_string(&mut username)?; fs::File::open(path)?.read_to_string(&mut username)?;
if username.is_empty() { if username.is_empty() {