Clone this repo:
  1. b27ac98 Add SourceSpan.subspan() (#54) by Natalie Weizenbaum · 2 weeks ago master 1.7.0
  2. d510221 Re-enable lint disabled in the last PR (#53) by Nate Bosch · 10 weeks ago
  3. 2990380 Add support for highlighting multiple spans at once (#49) by Natalie Weizenbaum · 3 months ago 1.6.0
  4. 709dcb0 Fix newly enforced package:pedantic lints (#51) by Nate Bosch · 4 months ago
  5. 1ec57ba Enable comment_references lint (#50) by Nate Bosch · 4 months ago

source_span is a library for tracking locations in source code. It's designed to provide a standard representation for source code locations and spans so that disparate packages can easily pass them among one another, and to make it easy to generate human-friendly messages associated with a given piece of code.

The most commonly-used class is the package's namesake, SourceSpan. It represents a span of characters in some source file, and is often attached to an object that has been parsed to indicate where it was parsed from. It provides access to the text of the span via SourceSpan.text and can be used to produce human-friendly messages using SourceSpan.message().

When parsing code from a file, SourceFile is useful. Not only does it provide an efficient means of computing line and column numbers, SourceFile.span() returns special FileSpans that are able to provide more context for their error messages.