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pub type Result<T> = std::result::Result<T, Error>;
#[derive(Default, Debug)]
pub struct Error {
message: String,
path: String,
span: Option<(usize, usize)>,
}
impl std::error::Error for Error {}
impl From<Error> for std::io::Error {
fn from(error: Error) -> Self {
std::io::Error::new(std::io::ErrorKind::Other, error.message.as_str())
}
}
impl From<syn::Error> for Error {
fn from(error: syn::Error) -> Self {
let start = error.span().start();
Self { message: error.to_string(), span: Some((start.line, start.column)), ..Self::default() }
}
}
impl std::fmt::Display for Error {
fn fmt(&self, fmt: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
writeln!(fmt, "error: {}", self.message)?;
if !self.path.is_empty() {
if let Some((line, column)) = self.span {
writeln!(fmt, " --> {}:{line}:{column}", self.path)?;
} else {
writeln!(fmt, " --> {}", self.path)?;
}
}
Ok(())
}
}
impl Error {
pub(crate) fn new(message: &str) -> Self {
Self { message: message.to_string(), ..Self::default() }
}
pub(crate) fn with_path(self, path: &str) -> Self {
Self { path: path.to_string(), ..self }
}
// pub(crate) fn with_span(self, span: proc_macro2::Span) -> Self {
// let start = span.start();
// Self {
// span: Some((start.line, start.column)),
// ..self
// }
// }
}
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