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#![forbid(unsafe_code)]
#[derive(Debug)]
pub struct Error {
pub message: String,
}
pub type Result<T> = std::result::Result<T, Error>;
impl std::fmt::Display for Error {
fn fmt(&self, fmt: &mut std::fmt::Formatter<'_>)
-> std::result::Result<(), std::fmt::Error>
{
fmt.write_str(&self.message)
}
}
impl From<winit::error::EventLoopError> for Error {
fn from(e: winit::error::EventLoopError) -> Self {
match e {
winit::error::EventLoopError::NotSupported(e) => Self::from(e),
winit::error::EventLoopError::Os(e) => Self::from(e),
winit::error::EventLoopError::RecreationAttempt => Error {
message:
"There may only ever be a single winit event loop.".to_string()
},
winit::error::EventLoopError::ExitFailure(code) => Error {
message:
format!("Clean unhappy exit with code {} via winit event loop",
code)
}
}
}
}
impl From<winit::error::NotSupportedError> for Error {
fn from(e: winit::error::NotSupportedError) -> Self {
Error {
message:
format!("The winit backend does not support an operation: {}",
e.to_string())
}
}
}
impl From<winit::error::OsError> for Error {
fn from(e: winit::error::OsError) -> Self {
Error {
message: format!("The OS told winit about an error: {}", e.to_string())
}
}
}
impl From<libloading::Error> for Error {
fn from(e: libloading::Error) -> Self {
Error {
message: format!("The dynamic object loader reported an error: {}",
e.to_string())
}
}
}
impl From<Box<dyn vulkanalia::loader::LoaderError>> for Error {
fn from(e: Box<dyn vulkanalia::loader::LoaderError>) -> Self {
Error {
message: format!("The Vulkan loader reported an error: {}",
e.to_string())
}
}
}
impl From<vulkanalia::vk::ErrorCode> for Error {
fn from(e: vulkanalia::vk::ErrorCode) -> Self {
Error {
message: format!("Vulkan gave an error code: {}", e.to_string())
}
}
}
impl From<vulkanalia::bytecode::BytecodeError> for Error {
fn from(e: vulkanalia::bytecode::BytecodeError) -> Self {
Error {
message: match e {
vulkanalia::bytecode::BytecodeError::Alloc =>
"Unable to allocate buffer for SPIR-V bytecode.".to_string(),
vulkanalia::bytecode::BytecodeError::Length(length) =>
format!("Compiled SPIR-V bytecode has length {}, \
which means it's corrupt.", length)
}
}
}
}
impl From<std::io::Error> for Error {
fn from(e: std::io::Error) -> Self {
Error {
message: format!("System I/O error: {}", e),
}
}
}
impl From<png::DecodingError> for Error {
fn from(e: png::DecodingError) -> Self {
match e {
png::DecodingError::IoError(e) => Self::from(e),
png::DecodingError::Format(_) => Error {
message: "Texture image is not a valid PNG.".to_string(),
},
png::DecodingError::Parameter(e) => Error {
message: format!("PNG library misusage: {}", e),
},
png::DecodingError::LimitsExceeded => Error {
message: "PNG needed too much memory to decode.".to_string(),
}
}
}
}
pub fn ignore_errors(mut body: impl FnMut() -> Result<()>) -> () {
if let Err(e) = body() {
eprintln!("Error: {}", e);
}
}
pub enum Acceptable<T> {
Accepted(T),
Rejected(String),
}
impl<T> Acceptable<T> {
#[allow(unused)]
pub fn is_accepted(&self) -> bool {
if let Acceptable::Accepted(_) = self { true } else { false }
}
#[allow(unused)]
pub fn is_rejected(&self) -> bool {
if let Acceptable::Rejected(_) = self { true } else { false }
}
#[allow(unused)]
pub fn unwrap(self) -> T {
if let Acceptable::Accepted(result) = self {
result
} else {
panic!("Unwrapped a rejected Acceptable.");
}
}
pub fn require(self) -> Result<T> {
match self {
Acceptable::Accepted(value) => Ok(value),
Acceptable::Rejected(message) => Err(Error { message }),
}
}
}
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