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rascal

The implementation of the Rascal meta-programming language (including interpreter, type checker, parser generator, compiler and JVM based run-time system)

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Description

The implementation of the Rascal meta-programming language (including interpreter, type checker, parser generator, compiler and JVM based run-time system)

README

Rascal - Metaprogramming Language

Build and Deploy

This is the core implementation of the Rascal meta-programming language. It contains the interpreter, the parser generator, the parser run-time, the (documented) standard library, the type checker, the compiler, and the documentation compiler ("tutor").

Other relevant repositories:

Please visit http://www.rascal-mpl.org for all information regarding Rascal.

For questions use the rascal tag on StackOverflow.

Release History

VersionChangesUrgencyDate
v0.42.2Latest release: v0.42.2High4/14/2026
v0.42.1Fixed 2 bugs: - An type-checker error with parameterized types (https://github.com/usethesource/rascal/pull/2693) - Subtle errors caused by programmatic uses of doImport forgot to clear lookup caches afterwards, it fixes #2694 (https://github.com/usethesource/rascal/pull/2695)Medium3/17/2026
v0.42.0Read the full release notes here: https://www.rascal-mpl.org/release-notes/rascal-0-42-x-release-notes/Low3/3/2026
v0.41.3-RC1Release v0.41.3-RC1Low1/27/2026
v0.41.0Release v0.41.0Low12/19/2025
v0.41.1Release v0.41.1Low12/19/2025
v0.41.2The new latest release of rascal, please read the release-notes: https://www.rascal-mpl.org/release-notes/rascal-0-41-x-release-notes/Low12/17/2025
v0.40.17Newest release of rascal, containing a year of fixes and improvements, [read the release-notes for more details](https://www.rascal-mpl.org/release-notes/rascal-0-40-x-release-notes/)Low11/15/2024
v0.34.1Release v0.34.1Low5/31/2024
v0.31.0Release v0.31.0Low6/29/2023
v0.32.0Release v0.32.0Low6/29/2023
v0.33.0Release v0.33.0Low6/29/2023
v0.28.11Release v0.28.11Low2/1/2023
v0.23.2- Improvements to the IDE Services availability in REPLs - New URIResolverRegistry feature: Fallback resolvers, a special class that can be passed as argument to the jvm to handle all scheme's not defined by the resolvers in the jar. Low5/17/2022
v0.23.0Release v0.23.0Low4/22/2022
v0.23.1Release v0.23.1Low4/22/2022
v0.22.2Release v0.22.2Low4/2/2022
v0.22.3Release v0.22.3Low4/2/2022
v0.19.5Release v0.19.5Low4/2/2022
v0.19.6This is a release of Rascal that is still executable with a java 8 jvm. Is a collection of fixes and small features needed for rascal-language-server. **Full Changelog**: https://github.com/usethesource/rascal/compare/v0.19.3...v0.19.6Low11/2/2021
v0.19.5-RC2Release v0.19.5-RC2Low10/18/2021
v0.19.4-RC11Release v0.19.4-RC11Low10/18/2021
v0.19.3Release v0.19.3Low10/18/2021
v0.19.2Release v0.19.2Low10/18/2021
v0.19.1Release v0.19.1Low10/18/2021
v0.18.2Release v0.18.2Low10/18/2021
v0.18.1Release v0.18.1Low10/18/2021
v0.18.0Release v0.18.0Low10/18/2021
v0.17.0Release v0.17.0Low10/18/2021
v0.15.4Release v0.15.4Low10/18/2021
v0.16.3Release v0.16.3Low10/18/2021
v0.15.3Release v0.15.3Low10/18/2021
v0.15.1Release v0.15.1Low10/18/2021
v0.16.0Release v0.16.0Low10/18/2021
v0.14.1Release v0.14.1Low10/18/2021
v0.14.0Release v0.14.0Low10/18/2021
v0.13.1Release v0.13.1Low10/18/2021
v0.13.0Release v0.13.0Low10/18/2021
v0.11.0Release v0.11.0Low10/18/2021
v0.10.0Release v0.10.0Low10/18/2021
v0.9.3Release v0.9.3Low10/18/2021
v0.9.2Release v0.9.2Low10/18/2021
v0.9.1Release v0.9.1Low10/18/2021
v0.9.0Release v0.9.0Low10/18/2021
v0.8.4-bs14Release v0.8.4-bs14Low10/18/2021
v0.8.3-bs14Release v0.8.3-bs14Low10/18/2021
v0.8.0Release v0.8.0Low10/18/2021
v0.7.3Release v0.7.3Low10/18/2021
v0.7.2Release v0.7.2Low10/18/2021
v0.7.0Release v0.7.0Low10/18/2021

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