#![recursion_limit = "1024"]
#[macro_use]
extern crate error_chain;
mod errors {
error_chain! { }
}
use errors::*;
fn main() {
if let Err(ref e) = run() {
use ::std::io::Write;
let stderr = &mut ::std::io::stderr();
let errmsg = "Error writing to stderr";
writeln!(stderr, "error: {}", e).expect(errmsg);
for e in e.iter().skip(1) {
writeln!(stderr, "caused by: {}", e).expect(errmsg);
}
if let Some(backtrace) = e.backtrace() {
writeln!(stderr, "backtrace: {:?}", backtrace).expect(errmsg);
}
::std::process::exit(1);
}
}
#[allow(dead_code)]
fn alternative_main() {
if let Err(ref e) = run() {
use std::io::Write;
use error_chain::ChainedError; let stderr = &mut ::std::io::stderr();
let errmsg = "Error writing to stderr";
writeln!(stderr, "{}", e.display()).expect(errmsg);
::std::process::exit(1);
}
}
fn run() -> Result<()> {
use std::fs::File;
File::open("tretrete")
.chain_err(|| "unable to open tretrete file")?;
Ok(())
}