mirror of
https://github.com/haraldh/chainerror.git
synced 2024-10-05 12:15:10 +02:00
28 lines
560 B
Rust
28 lines
560 B
Rust
use chainerror::*;
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use std::error::Error;
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use std::io;
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use std::result::Result;
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fn do_some_io() -> Result<(), Box<Error>> {
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Err(io::Error::from(io::ErrorKind::NotFound))?;
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Ok(())
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}
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fn func2() -> Result<(), Box<Error>> {
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let filename = "foo.txt";
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do_some_io().map_err(mstrerr!("Error reading '{}'", filename))?;
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Ok(())
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}
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fn func1() -> Result<(), Box<Error>> {
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func2().map_err(mstrerr!("func1 error"))?;
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Ok(())
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}
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fn main() -> Result<(), Box<Error>> {
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if let Err(e) = func1() {
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eprintln!("{:?}", e);
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}
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Ok(())
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}
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