Roadmap

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• Groovy 1.8-final: End of April 2011 
• Groovy 1.8.1: End of July 2011 
• Groovy 1.8.3: Early September 2011 
• Groovy 1.8.4: Octobre 2011 
• Groovy 1.8.5: End of December 2011 
• Groovy 1.8.6: February 2012 
• Groovy 1.8.7: April 20122012 

Groovy 2.0

Groovy 2.0 was formerly known as Groovy 1.9, but considering the important new features, a 2.0 moniker was better representing the importance of that release.

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Release mainly geared towards the alignments with the upcoming but delayed JDK 7.

• work related to JDK 7
  
  • notes on JDK 7 and JDK 8 future
  • usage of invokedynamic and annonymous classloader (JDK7 features)
  • updates for JDK 7 language features (aka Project Coin)
• modularity of Groovy (splitting Groovy in smaller JARs on a per feature basis) and extension modules
• static type checking AST transform
• static compilation AST transform

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• Groovy 1.9-beta-1: July 2011 
• Groovy 1.9-beta-3: September 2011 
• Groovy 1.9-beta-4: October 2011 
• Groovy 2.0-beta-1: November 2011 
• Groovy 2.0-beta-2: December 2011 
• Groovy 2.0-beta-3: March May 2012
• Groovy 2.0-betarc-4: April 20121: end of May 2012 
• Groovy 2.0-rc-1: April 2012(possible 2: early June 2012 
• Groovy 2.0-rc-3: mid June 2012 
• Groovy 2: Mid April 2012 if needed).0-rc-4: end of June 2012 
• Groovy 2.0-final: End end of April June 2012

Groovy 3.0

Feature set

• New Meta-Object Protocol
• Rewrite the Groovy grammar from scratch with Antlr 4
• Retrofitting Groovy closures to accomodate JDK 8 upcoming closures for interoperability

Other topics we could consider for Groovy

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2.

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x and beyond

• compiler related:
  • investigate the integration of the Eclipse joint compiler to replace the Groovy stub-based joint compiler
  • investigate making the groovyc compiler multithreaded
• a treturn keyword for tail calls for closures and methods
• Incremental compiler
• Improved runtime performance
• ability to pass expression trees / AST nodes as parameters (see C# 4's own expression tree)
• lexical categories
• a symbol concept, a bit like Ruby's :symbol, or like Java interned strings
• co-routines and/or generators
• tail-call recursion
• pattern matching
• parser combinators
• a native template engine compiling to AST (faster, correct line numbers for error reporting, optimized outputting, etc.)
• ...