80 lines
2.3 KiB
Rust
80 lines
2.3 KiB
Rust
use std::error::Error;
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use std::fmt;
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use std::path::PathBuf;
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use crate::{Diagnostic, SourceLocation};
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/// Source provenance, independent of filesystem layout or VM heap handles.
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/// Endor revisions are opaque labels supplied by the host, not verified hashes.
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub enum SourceOrigin {
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Text { name: String },
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Stream { name: String },
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File { path: PathBuf },
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Endor { uri: String, revision: String },
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}
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impl fmt::Display for SourceOrigin {
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fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
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match self {
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Self::Text { name } | Self::Stream { name } => formatter.write_str(name),
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Self::File { path } => write!(formatter, "{}", path.display()),
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Self::Endor { uri, revision } => write!(formatter, "{uri} [revision {revision}]"),
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}
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}
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}
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/// An owned, immutable UTF-8 snapshot. Reader adapters preserve the text exactly
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/// so token byte offsets still refer to the original decoded source.
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub struct SourceUnit {
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origin: SourceOrigin,
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text: String,
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}
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impl SourceUnit {
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pub(crate) fn new(origin: SourceOrigin, text: String) -> Self {
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Self { origin, text }
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}
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pub fn origin(&self) -> &SourceOrigin {
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&self.origin
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}
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pub fn text(&self) -> &str {
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&self.text
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}
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/// Bind a diagnostic to this snapshot before discarding its source buffer.
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pub fn annotate(&self, diagnostic: Diagnostic) -> SourceDiagnostic {
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SourceDiagnostic {
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location: diagnostic.location(&self.text),
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origin: self.origin.clone(),
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diagnostic: Box::new(diagnostic),
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}
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}
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}
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub struct SourceDiagnostic {
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pub origin: SourceOrigin,
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pub location: SourceLocation,
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pub diagnostic: Box<Diagnostic>,
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}
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impl fmt::Display for SourceDiagnostic {
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fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
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write!(
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formatter,
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"{}:{}:{}: {}",
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self.origin, self.location.line, self.location.column, self.diagnostic.message
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)
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}
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}
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impl Error for SourceDiagnostic {
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fn source(&self) -> Option<&(dyn Error + 'static)> {
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Some(self.diagnostic.as_ref())
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}
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}
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