74 lines
1.4 KiB
Rust
74 lines
1.4 KiB
Rust
use std::error::Error;
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#[derive(Debug, Clone, Copy)]
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pub struct Location<'a> {
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pub line: usize,
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pub col: usize,
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pub file: Option<&'a str>,
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}
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#[derive(Debug, Clone)]
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pub struct OwnedLocation {
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pub line: usize,
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pub col: usize,
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pub file: Option<String>,
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}
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impl<'a> From<Location<'a>> for OwnedLocation {
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fn from(l: Location<'a>) -> OwnedLocation {
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OwnedLocation {
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line: l.line,
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col: l.col,
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file: l.file.map(|v| v.to_string()),
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}
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}
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}
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impl<'a> From<&'a OwnedLocation> for Location<'a> {
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fn from(l: &'a OwnedLocation) -> Location<'a> {
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Location {
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line: l.line,
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col: l.col,
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file: l.file.as_deref(),
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}
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}
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}
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pub trait ErrorWithLocation: Error {
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fn get_location(&self) -> Location;
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}
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#[derive(Debug)]
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pub struct ErrorLocationWrapper<T: Error> {
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pub inner: T,
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location: OwnedLocation,
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}
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impl<T: Error> ErrorLocationWrapper<T> {
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pub fn new(inner: T, location: OwnedLocation) -> Self {
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Self { inner, location }
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}
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}
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impl<T: std::error::Error> ErrorWithLocation for ErrorLocationWrapper<T> {
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fn get_location(&self) -> Location {
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(&self.location).into()
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}
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}
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impl<T: Error> std::fmt::Display for ErrorLocationWrapper<T> {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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write!(
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f,
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"An error occured: {} \n On line: {}, col: {}",
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self.inner, self.location.line, self.location.col
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)
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}
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}
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impl<T: Error> Error for ErrorLocationWrapper<T> {
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fn cause(&self) -> Option<&dyn Error> {
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Some(&self.inner)
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}
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}
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