FASTXML

FASTXML is a recently created project that integrates with Moose and leverages the Tree-Sitter parser to analyze XML source code in Pharo.

Features

FASTXML relies on:

• FAST, to ensure compatibility with Moose.
• Pharo-Tree-Sitter, implemented in Pharo via the FFI protocol to efficiently parse XML source code. It is also used to do incremental parsing.

FASTXML metamodel is defined in a way where nodes align with those generated by Tree-Sitter.

Installation

To load FASTXML in Pharo, execute the following in a Moose image:

Metacello new  
  baseline: 'FASTXML';  
  repository: 'github://Evref-BL/FAST-XML:main';  
  load.

Usage

To use it, please ensure that you have installed the corresponding libraries for Tree Sitter on your machine, to ensure parsing succeeds. Normally, this has been automated for different operating systems. But for more details, you can have a look at this blog-post.

To use it in Pharo, you can check example below:

res := FASTXMLImporter new parse:  '<hello>Welcome</hello>'. 

NB

The project is updated starting October 1 2026. It works on Moose 12+ (despite making the ci runs only for Moose 13, and this is because one of the tests is using a slot that is not defined in Moose 12, which makes the tests fail). The metamodel is complete following the description of tree sitter xml original repo.

If you think an update is recommended or new feature is requested ... Your contribution is more than welcome. Happy coding with Pharo and XML :)