a2668e3327
* Add some docs for meta.rs * add better explanation for Span merging * Add some doc tests - not sure how to get them to run * get rid of doc comments for the temporary method * add doc test for is_unknown * fmt |
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| build.rs | ||
| Cargo.toml | ||
| README.md | ||
nu-source
Overview
The nu-source crate contains types and traits used for keeping track of metadata about values being processed.
Nu uses Tags to keep track of where a value came from, an AnchorLocation,
as well as positional information about the value, a Span.
An AchorLocation can be a Url, File, or Source text that a value was parsed from.
The source Text is special in that it is a type similar to a String that comes with the ability to be cheaply cloned.
A Span keeps track of a value's start and end positions.
These types make up the metadata for a value and are wrapped up together in a Tagged struct,
which holds everything needed to track and locate a value.
Nu's metadata system can be seen when reporting errors. In the following example Nu is able to report to the user where the typo of a column originated from.
1 | ls | get typ
| ^^^ did you mean 'type'?
In addition to metadata tracking, nu-source also contains types and traits related to debugging, tracing, and formatting the metadata and values it processes.
Other Resources
- Nushell Github Project: Contains all projects in the Nushell ecosystem such as the source code to Nushell as well as website and books.
- Nushell Git Repository: A direct link to the source git repository for Nushell
- Nushell Contributor Book: An overview of topics about Nushell to help you get started contributing to the project.
- Discord Channel