Clone this repo:
  1. 24151fd populate the pubspec repository field (#82) by Devon Carew · 3 weeks ago master
  2. 8ae724c Add SourceSpanWithContextExtension.subspan (#81) by Natalie Weizenbaum · 7 weeks ago 1.9.0
  3. dc189b4 Don't crash when highlighting multiple spans with null URLs (#78) by Natalie Weizenbaum · 5 months ago
  4. 7b6dba6 Fix broken lints, update to pkg:lints, Bump SDK constraint (#77) by Kevin Moore · 8 months ago
  5. 73ab711 fix lint (#76) by Kevin Moore · 1 year, 1 month ago

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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.