quarto-source-map

Unified source-location tracking with byte-range provenance, for parsers and diagnostics.

quarto-source-map records where a piece of text came from and follows it through transformation chains (extraction, concatenation, normalization), so a position in derived text can be mapped back to a line/column in the original source file. It is the source-location substrate underneath Quarto's diagnostics, but it has no Quarto-specific dependencies and is usable on its own.

Core types

• SourceInfo — a location plus its transformation history.
• SourceContext — registers files and provides the content needed to map offsets to row/column.
• MappedLocation — the result of mapping an offset back through the chain.

Example

use quarto_source_map::*;

// Create a context and register a file.
let mut ctx = SourceContext::new();
let file_id = ctx.add_file("main.qmd".into(), Some("# Hello\nWorld".into()));

// A source location stores only offsets…
let info = SourceInfo::original(file_id, 0, 7);

// …and maps to row/column on demand.
let mapped = info.map_offset(0, &ctx).unwrap();
assert_eq!(mapped.location.row, 0);
assert_eq!(mapped.location.column, 0);

License

MIT © Posit Software, PBC