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  1. d492551 travis: test on the oldest supported SDK (#34) by Kevin Moore · 3 weeks ago master
  2. 9e498b0 Fix a highlighting bug (#33) by Natalie Weizenbaum · 3 months ago 1.5.5
  3. 1a97871 Drop special support for point spans at the end of files (#31) by Natalie Weizenbaum · 4 months ago 1.5.4
  4. 69fdf30 Fix a bug when highlighting an end-of-file point span (#30) by Natalie Weizenbaum · 4 months ago 1.5.3
  5. b2673d3 Merge pull request #29 from dart-lang/fixes by Natalie Weizenbaum · 4 months ago 1.5.2

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.