winit-sonoma-fix/src/error.rs

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2.1 KiB
Rust
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use std::fmt;
use std::error;
use platform_impl;
/// An error whose cause it outside Winit's control.
#[derive(Debug)]
pub enum ExternalError {
/// The operation is not supported by the backend.
NotSupported(NotSupportedError),
/// The OS cannot perform the operation.
Os(OsError),
}
/// The error type for when the requested operation is not supported by the backend.
#[derive(Clone)]
pub struct NotSupportedError {
_marker: (),
}
/// The error type for when the OS cannot perform the requested operation.
#[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, formatter: &mut fmt::Formatter) -> Result<(), fmt::Error> {
formatter.pad(&format!("os error at {}:{}: {}", self.file, self.line, self.error))
}
}
impl fmt::Display for ExternalError {
fn fmt(&self, formatter: &mut fmt::Formatter) -> Result<(), fmt::Error> {
match self {
ExternalError::NotSupported(e) => e.fmt(formatter),
ExternalError::Os(e) => e.fmt(formatter),
}
}
}
impl fmt::Debug for NotSupportedError {
fn fmt(&self, formatter: &mut fmt::Formatter) -> Result<(), fmt::Error> {
formatter.debug_struct("NotSupportedError").finish()
}
}
impl fmt::Display for NotSupportedError {
fn fmt(&self, formatter: &mut fmt::Formatter) -> Result<(), fmt::Error> {
formatter.pad("the requested operation is not supported by Winit")
}
}
impl error::Error for OsError {}
impl error::Error for ExternalError {}
impl error::Error for NotSupportedError {}