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use std::{error::Error, fmt};
#[derive(Clone, Debug)]
pub struct ShaderError<E> {
/// The source code of the shader.
pub source: String,
pub label: Option<String>,
pub inner: Box<E>,
}
#[cfg(feature = "wgsl-in")]
impl fmt::Display for ShaderError<crate::front::wgsl::ParseError> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let label = self.label.as_deref().unwrap_or_default();
let string = self.inner.emit_to_string(&self.source);
write!(f, "\nShader '{label}' parsing {string}")
}
}
#[cfg(feature = "glsl-in")]
impl fmt::Display for ShaderError<crate::front::glsl::ParseErrors> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let label = self.label.as_deref().unwrap_or_default();
let string = self.inner.emit_to_string(&self.source);
write!(f, "\nShader '{label}' parsing {string}")
}
}
#[cfg(feature = "spv-in")]
impl fmt::Display for ShaderError<crate::front::spv::Error> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let label = self.label.as_deref().unwrap_or_default();
let string = self.inner.emit_to_string(&self.source);
write!(f, "\nShader '{label}' parsing {string}")
}
}
impl fmt::Display for ShaderError<crate::WithSpan<crate::valid::ValidationError>> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
use codespan_reporting::{
diagnostic::{Diagnostic, Label},
files::SimpleFile,
term,
};
let label = self.label.as_deref().unwrap_or_default();
let files = SimpleFile::new(label, &self.source);
let config = term::Config::default();
let mut writer = term::termcolor::NoColor::new(Vec::new());
let diagnostic = Diagnostic::error().with_labels(
self.inner
.spans()
.map(|&(span, ref desc)| {
Label::primary((), span.to_range().unwrap()).with_message(desc.to_owned())
})
.collect(),
);
term::emit(&mut writer, &config, &files, &diagnostic).expect("cannot write error");
write!(
f,
"\nShader validation {}",
String::from_utf8_lossy(&writer.into_inner())
)
}
}
impl<E> Error for ShaderError<E>
where
ShaderError<E>: fmt::Display,
E: Error + 'static,
{
fn source(&self) -> Option<&(dyn Error + 'static)> {
Some(&self.inner)
}
}
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