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use std::{error, fmt};
use crate::platform_impl;
#[derive(Debug)]
pub enum ExternalError {
NotSupported(NotSupportedError),
Os(OsError),
}
#[derive(Clone)]
pub struct NotSupportedError {
_marker: (),
}
#[derive(Debug)]
pub struct OsError {
line: u32,
file: &'static str,
error: platform_impl::OsError,
}
impl NotSupportedError {
#[inline]
#[allow(dead_code)]
pub(crate) fn new() -> NotSupportedError {
NotSupportedError { _marker: () }
}
}
impl OsError {
#[allow(dead_code)]
pub(crate) fn new(line: u32, file: &'static str, error: platform_impl::OsError) -> OsError {
OsError { line, file, error }
}
}
#[allow(unused_macros)]
macro_rules! os_error {
($error:expr) => {{
crate::error::OsError::new(line!(), file!(), $error)
}};
}
impl fmt::Display for OsError {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
f.pad(&format!(
"os error at {}:{}: {}",
self.file, self.line, self.error
))
}
}
impl fmt::Display for ExternalError {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
match self {
ExternalError::NotSupported(e) => e.fmt(f),
ExternalError::Os(e) => e.fmt(f),
}
}
}
impl fmt::Debug for NotSupportedError {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
f.debug_struct("NotSupportedError").finish()
}
}
impl fmt::Display for NotSupportedError {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
f.pad("the requested operation is not supported by Winit")
}
}
impl error::Error for OsError {}
impl error::Error for ExternalError {}
impl error::Error for NotSupportedError {}