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| |=== |
| a| NOTE: _WARNING:_ |
| Material on this page is still under development! We are currently releasing alpha versions of Groovy 4.0 with a goal |
| of gathering feedback on the language changes from our community. In addition, the beta versions assist other projects |
| and tool vendors within the Groovy ecosystem to begin assessing the impact of moving to/supporting Groovy 4.0. |
| Caution should be exercised if using new features as the details may change before final release. |
| |=== |
| |
| [[Groovy4.0old-parser]] |
| == Old parser removal |
| |
| In Groovy 4.0, the old Antlr2 based parser is removed. Please use Groovy versions up to 3.x if you require the old parser. |
| |
| [[Groovy4.0indy]] |
| == Classic bytecode generation removal |
| |
| For many versions, Groovy could generate classic _call-site based_ bytecode |
| or bytecode targetting the JDK7+ invoke dynamic ("indy") bytecodes. |
| In Groovy 4.0, only bytecode using the latter approach can be generated. |
| Consequently, there are no longer any "-indy" jars. |
| |
| Currently, the Groovy runtime still contains any necessary support for |
| classes compiled using older versions of Groovy. |
| Please use Groovy versions up to 3.x if you need to generate old bytecode. |
| |
| [[Groovy4.0maven-coordinates]] |
| == Maven coordinates |
| |
| In Groovy 4.0, the _groupId_ of the maven coordinates for Groovy have changed from `org.codehaus.groovy` |
| to `org.apache.groovy`. Please update your Gradle/Maven/other build settings appropriately. |
| |
| [[Groovy4.0other]] |
| == Other improvements |
| |
| === JavaShell (incubating) |
| |
| A Java equivalent of GroovyShell, allowing to more easily work with snippets of Java code. |
| |
| === JSR308 improvements (work in progress) |
| |
| Groovy has been improving JSR-308 support over recent versions. |
| In Groovy 4.0, additional support has been added. |
| |
| === Java-inspired changes (under investigation) |
| |
| The following changes are being explored: |
| |
| * Switch expressions |
| * Module definitions written in Groovy |
| * Support for records |
| |
| == JDK requirements |
| |
| Groovy 4.0 requires JDK9+ to build and JDK8 is the minimum version of the JRE that we support. |
| |
| [[Groovy4.0releasenotes-Moreinformation]] |
| == More information |
| |
| You can browse all the link:../changelogs/changelog-4.0.0-unreleased.html[tickets closed for Groovy 4.0 in JIRA]. |
