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use std::error::Error;
use std::fmt::{self, Display, Formatter};
use std::io;
use std::result;
use image::ImageError;
use sdl2::video::WindowBuildError;
use sdl2::IntegerOrSdlError;
pub type Result<T = ()> = result::Result<T, TetraError>;
#[derive(Debug)]
pub enum TetraError {
Io(io::Error),
Sdl(String),
OpenGl(String),
Image(ImageError),
#[doc(hidden)]
__Nonexhaustive,
}
impl Display for TetraError {
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
match self {
TetraError::Io(e) => write!(f, "IO error: {}", e),
TetraError::Sdl(e) => write!(f, "SDL error: {}", e),
TetraError::OpenGl(e) => write!(f, "OpenGL error: {}", e),
TetraError::Image(e) => write!(f, "Image processing error: {}", e),
TetraError::__Nonexhaustive => unreachable!(),
}
}
}
impl Error for TetraError {
fn source(&self) -> Option<&(dyn Error + 'static)> {
match self {
TetraError::Io(e) => Some(e),
TetraError::Sdl(_) => None,
TetraError::OpenGl(_) => None,
TetraError::Image(e) => Some(e),
TetraError::__Nonexhaustive => unreachable!(),
}
}
}
impl From<io::Error> for TetraError {
fn from(e: io::Error) -> TetraError {
TetraError::Io(e)
}
}
impl From<ImageError> for TetraError {
fn from(e: ImageError) -> TetraError {
TetraError::Image(e)
}
}
impl From<WindowBuildError> for TetraError {
fn from(e: WindowBuildError) -> TetraError {
TetraError::Sdl(e.to_string())
}
}
impl From<IntegerOrSdlError> for TetraError {
fn from(e: IntegerOrSdlError) -> TetraError {
TetraError::Sdl(e.to_string())
}
}