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// Copyright (C) 2019 Robin Krahl <robin.krahl@ireas.org>
// SPDX-License-Identifier: MIT
use std::fmt;
use std::io;
use std::process;
use std::result;
use std::str;
use std::string;
/// A result returned by `dialog`.
pub type Result<T> = result::Result<T, Error>;
/// An error returned by `dialog`.
#[derive(Debug)]
pub enum Error {
/// A general error with an error message.
Error(String),
/// An input or output error.
IoError(io::Error),
/// An UTF-8 error.
Utf8Error(str::Utf8Error),
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match *self {
Error::Error(ref s) => write!(f, "Error: {}", s),
Error::IoError(ref e) => write!(f, "I/O error: {}", e),
Error::Utf8Error(ref e) => write!(f, "UTF-8 error: {}", e),
}
}
}
impl From<&str> for Error {
fn from(string: &str) -> Error {
Error::Error(string.to_string())
}
}
impl From<io::Error> for Error {
fn from(error: io::Error) -> Error {
Error::IoError(error)
}
}
impl From<str::Utf8Error> for Error {
fn from(error: str::Utf8Error) -> Error {
Error::Utf8Error(error)
}
}
impl From<string::FromUtf8Error> for Error {
fn from(error: string::FromUtf8Error) -> Error {
Error::Utf8Error(error.utf8_error())
}
}
impl From<(&str, process::ExitStatus)> for Error {
fn from(data: (&str, process::ExitStatus)) -> Error {
let (command, status) = data;
let msg = match status.code() {
Some(code) => format!("Command {} failed with exit status {}", command, code),
None => format!("Command {} was terminated by a signal", command),
};
Error::Error(msg)
}
}
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