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Issue 381363002: Extract out a source_span package from source_maps. (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart
Patch Set: code review Created 6 years, 5 months ago
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1 `source_span` is a library for tracking locations in source code. It's designed
2 to provide a standard representation for source code locations and spans so that
3 disparate packages can easily pass them among one another, and to make it easy
4 to generate human-friendly messages associated with a given piece of code.
5
6 The most commonly-used class is the package's namesake, `SourceSpan`. It
7 represents a span of characters in some source file, and is often attached to an
8 object that has been parsed to indicate where it was parsed from. It provides
9 access to the text of the span via `SourceSpan.text` and can be used to produce
10 human-friendly messages using `SourceSpan.message()`.
11
12 When parsing code from a file, `SourceFile` is useful. Not only does it provide
13 an efficient means of computing line and column numbers, `SourceFile.span()`
14 returns special `FileSpan`s that are able to provide more context for their
15 error messages.
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